From: mpv <mpv@opencascade.com>
Date: Mon, 29 Aug 2016 10:09:27 +0000 (+0300)
Subject: Implementation of experimental approximated pipe creation feature done by Edouard... 
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=a06f792be11561a0a3378524d7a1f0cb7ef782bb;p=modules%2Fshaper.git

Implementation of experimental approximated pipe creation feature done by Edouard Mei.
---

diff --git a/src/FeaturesPlugin/CMakeLists.txt b/src/FeaturesPlugin/CMakeLists.txt
index 451b9c002..03df9caa6 100644
--- a/src/FeaturesPlugin/CMakeLists.txt
+++ b/src/FeaturesPlugin/CMakeLists.txt
@@ -28,6 +28,10 @@ SET(PROJECT_HEADERS
     FeaturesPlugin_ValidatorTransform.h
     FeaturesPlugin_Validators.h
     FeaturesPlugin_RemoveSubShapes.h
+    FeaturesPlugin_PipeApprox.h
+    FeaturesPlugin_PipeApproxLaw.h
+    FeaturesPlugin_ParameterLaw.h
+    FeaturesPlugin_Validators.h
 )
 
 SET(PROJECT_SOURCES
@@ -54,6 +58,10 @@ SET(PROJECT_SOURCES
     FeaturesPlugin_ValidatorTransform.cpp
     FeaturesPlugin_Validators.cpp
     FeaturesPlugin_RemoveSubShapes.cpp
+    FeaturesPlugin_PipeApprox.cpp
+    FeaturesPlugin_PipeApproxLaw.cpp
+    FeaturesPlugin_ParameterLaw.cpp
+    FeaturesPlugin_Validators.cpp
 )
 
 SET(XML_RESOURCES
@@ -74,6 +82,9 @@ SET(XML_RESOURCES
   pipe_widget.xml
   remove_subshapes_widget.xml
   union_widget.xml
+  pipeapprox_widget.xml
+  pipeapproxlaw_widget.xml
+  parameterlaw_widget.xml
 )
 
 SET(TEXT_RESOURCES
diff --git a/src/FeaturesPlugin/FeaturesPlugin_ParameterLaw.cpp b/src/FeaturesPlugin/FeaturesPlugin_ParameterLaw.cpp
new file mode 100644
index 000000000..4f38329ea
--- /dev/null
+++ b/src/FeaturesPlugin/FeaturesPlugin_ParameterLaw.cpp
@@ -0,0 +1,131 @@
+// Copyright
+
+// File:        FeaturesPlugin_ParameterLaw.cpp
+
+
+#include "FeaturesPlugin_ParameterLaw.h"
+#include <ModelAPI_CompositeFeature.h>
+#include <ModelAPI_Tools.h>
+#include <ModelAPI_Attribute.h>
+#include <ModelAPI_Object.h>
+#include <Events_Loop.h>
+#include <ModelAPI_Events.h>
+//??#include "ParametersPlugin_Parameter.h"
+//??#include <SketchPlugin_SketchEntity.h>
+#include <ModelAPI_AttributeDouble.h>
+//#include <ModelAPI_AttributeSelectionList.h>
+#include <ModelAPI_AttributeSelection.h>
+#include <ModelAPI_AttributeString.h>
+#include <ModelAPI_AttributeBoolean.h>
+#include <ModelAPI_BodyBuilder.h>
+#include <ModelAPI_Session.h>
+#include <ModelAPI_Validator.h>
+#include <ModelAPI_ResultConstruction.h>
+#include <ModelAPI_ResultBody.h>
+#include <GeomAlgoAPI_CompoundBuilder.h>
+#include <GeomAlgoAPI_ShapeTools.h>
+#include <GeomAPI_Edge.h>
+#include <GeomAPI_Lin.h>
+
+#include <sstream>
+#include <string> 
+
+//=================================================================================================
+FeaturesPlugin_ParameterLaw::FeaturesPlugin_ParameterLaw()
+{
+}
+
+//=================================================================================================
+void FeaturesPlugin_ParameterLaw::initAttributes()
+{
+	data()->addAttribute(LAW_REFERENCE_ID(), ModelAPI_AttributeSelection::typeId());
+	data()->addAttribute(LAW_DEFINITION_ID(), ModelAPI_AttributeSelection::typeId());
+	data()->addAttribute(VARIABLE_ID(), ModelAPI_AttributeString::typeId());
+
+	data()->addAttribute(REVERSE_ID(), ModelAPI_AttributeBoolean::typeId());
+
+	data()->addAttribute(CREATION_METHOD(), ModelAPI_AttributeString::typeId());
+}
+
+//=================================================================================================
+void FeaturesPlugin_ParameterLaw::execute()
+{
+	// Getting Ref and Def
+	std::shared_ptr<GeomAPI_Shape> aRef;
+	std::shared_ptr<GeomAPI_Shape> aDef;
+	//REFERENCE
+	AttributeSelectionPtr aRefSelection = selection(LAW_REFERENCE_ID());
+	if(!aRefSelection.get()) {
+		setError("Error: Ref selection is empty.");
+		return;
+	}
+	aRef = std::dynamic_pointer_cast<GeomAPI_Shape>(aRefSelection->value());
+	if(!aRef.get()) {
+		// Probably it is a construction.
+		aRef = aRefSelection->context()->shape();
+	}
+	if(!aRef.get() || aRef->isNull()) {
+		setError("Error: Ref shape is null.");
+		return;
+	}
+	//DEFINITION
+	AttributeSelectionPtr aDefSelection = selection(LAW_DEFINITION_ID());
+	if(!aDefSelection.get()) {
+		setError("Error: Def selection is empty.");
+		return;
+	}
+	aDef = std::dynamic_pointer_cast<GeomAPI_Shape>(aDefSelection->value());
+	if(!aDef.get()) {
+		// Probably it is a construction.
+		aDef = aDefSelection->context()->shape();
+	}
+	if(!aDef.get() || aDef->isNull()) {
+		setError("Error: Def shape is null.");
+		return;
+	}
+
+	// Flags for reverse path
+    bool isReverse = boolean(REVERSE_ID())->value();
+
+	GeomAlgoAPI_ParameterLaw aParameterLawAlgo = GeomAlgoAPI_ParameterLaw(aDef, aRef, isReverse);
+	int aResultIndex = 0;
+
+	if(!aParameterLawAlgo.isDone()) {
+		static const std::string aPrismAlgoError = "Error: Param algo failed.";
+		setError(aPrismAlgoError);
+		aResultIndex = 0;
+		//break;
+	}
+	// Check if shape is valid
+	if(!aParameterLawAlgo.shape().get() || aParameterLawAlgo.shape()->isNull()) {
+		static const std::string aShapeError = "Error: Resulting shape is Null.";
+		setError(aShapeError);
+		aResultIndex = 0;
+		return;
+	}
+	if(!aParameterLawAlgo.isValid()) {
+		std::string aPrismAlgoError = "Error: Resulting shape is not valid.";
+		setError(aPrismAlgoError);
+		aResultIndex = 0;
+		//break;
+	}
+
+	ResultBodyPtr aResultBody = document()->createBody(data(), aResultIndex);
+	
+	loadNamingDS(aParameterLawAlgo, aResultBody);
+	setResult(aResultBody, aResultIndex);
+	aResultIndex++;
+	removeResults(aResultIndex);
+}
+
+void FeaturesPlugin_ParameterLaw::loadNamingDS(GeomAlgoAPI_ParameterLaw& theParameterLawAlgo,
+                    std::shared_ptr<ModelAPI_ResultBody> theResultBody)
+{
+	theResultBody->store(theParameterLawAlgo.shape());
+	
+	int aIndex = 0, aTag = 0;
+	const std::string aName = "Law";
+	std::ostringstream aStr;
+	aStr << aName << "_" << aIndex++;
+	theResultBody->generated(theParameterLawAlgo.shape(), aStr.str(), aTag++);
+}
\ No newline at end of file
diff --git a/src/FeaturesPlugin/FeaturesPlugin_ParameterLaw.h b/src/FeaturesPlugin/FeaturesPlugin_ParameterLaw.h
new file mode 100644
index 000000000..c6b48951b
--- /dev/null
+++ b/src/FeaturesPlugin/FeaturesPlugin_ParameterLaw.h
@@ -0,0 +1,97 @@
+// Copyright
+
+// File:        FeaturesPlugin_ParameterLaw.h
+
+
+#ifndef FeaturesPlugin_ParameterLaw_H_
+#define FeaturesPlugin_ParameterLaw_H_
+
+#include <FeaturesPlugin.h>
+
+#include <GeomAlgoAPI_ParameterLaw.h>
+#include <ModelAPI_Feature.h>
+#include <ModelAPI_AttributeSelection.h>
+#include <ModelAPI_AttributeSelectionList.h>
+#include <ModelAPI_Attribute.h>
+#include <ModelAPI_ResultBody.h>
+
+#include <memory>
+#include <list>
+
+class GeomAPI_Shape;
+class ModelAPI_ResultBody;
+
+/** \class FeaturesPlugin_Pipe
+ *  \ingroup Plugins
+ *  \brief Feature for creation of Pipe from the planar face.
+ *  Pipe creates the lateral faces based on edges of the base face and
+ *  the start and end faces and/or start and end angles.
+ */
+class FeaturesPlugin_ParameterLaw : public ModelAPI_Feature
+{
+ public:
+  /// Pipe kind.
+  inline static const std::string& ID()
+  {
+    static const std::string MY_ParameterLaw_ID("ParameterLaw");
+    return MY_ParameterLaw_ID;
+  }
+
+      /// attribute name of law reference curve
+  inline static const std::string& LAW_REFERENCE_ID()
+  {
+    static const std::string MY_LAW_REFERENCE_ID("law_reference");
+    return MY_LAW_REFERENCE_ID;
+  }
+
+      /// attribute name of law definition curve
+  inline static const std::string& LAW_DEFINITION_ID()
+  {
+    static const std::string MY_LAW_DEFINITION_ID("law_definition");
+    return MY_LAW_DEFINITION_ID;
+  }
+
+      /// attribute name of parameter name
+  inline static const std::string& VARIABLE_ID()
+  {
+    static const std::string MY_VARIABLE_ID("variable");
+    return MY_VARIABLE_ID;
+  }
+
+    /// attribute name of flag of reverse direction
+  inline static const std::string& REVERSE_ID()
+  {
+    static const std::string MY_REVERSE_ID("reverse_direction");
+    return MY_REVERSE_ID;
+  }
+
+  /// attribute name for creation method
+  inline static const std::string& CREATION_METHOD()
+  {
+    static const std::string METHOD_ATTR("CreationMethod");
+    return METHOD_ATTR;
+  }
+
+
+  /// \return the kind of a feature.
+  FEATURESPLUGIN_EXPORT virtual const std::string& getKind()
+  {
+    static std::string MY_KIND = FeaturesPlugin_ParameterLaw::ID();
+    return MY_KIND;
+  }
+
+  /// Creates a new part document if needed.
+  FEATURESPLUGIN_EXPORT virtual void execute();
+
+  /// Request for initialization of data model of the feature: adding all attributes.
+  FEATURESPLUGIN_EXPORT virtual void initAttributes();
+
+  /// Use plugin manager for features creation.
+  FeaturesPlugin_ParameterLaw();
+
+private:
+  /// Load Naming data structure of the feature to the document.
+  void loadNamingDS(GeomAlgoAPI_ParameterLaw& theParameterLawAlgo,
+                    std::shared_ptr<ModelAPI_ResultBody> theResultBody);
+};
+#endif
diff --git a/src/FeaturesPlugin/FeaturesPlugin_PipeApprox.cpp b/src/FeaturesPlugin/FeaturesPlugin_PipeApprox.cpp
new file mode 100644
index 000000000..b0804d590
--- /dev/null
+++ b/src/FeaturesPlugin/FeaturesPlugin_PipeApprox.cpp
@@ -0,0 +1,314 @@
+// Copyright
+
+// File:        FeaturesPlugin_PipeApprox.cpp
+
+
+#include "FeaturesPlugin_PipeApprox.h"
+
+#include <ModelAPI_CompositeFeature.h>
+#include <ModelAPI_Tools.h>
+#include <ModelAPI_Attribute.h>
+#include <ModelAPI_Object.h>
+#include <Events_Loop.h>
+#include <ModelAPI_Events.h>
+//??#include "ParametersPlugin_Parameter.h"
+//??#include <SketchPlugin_SketchEntity.h>
+#include <ModelAPI_AttributeDouble.h>
+//#include <ModelAPI_AttributeSelectionList.h>
+#include <ModelAPI_AttributeSelection.h>
+#include <ModelAPI_AttributeString.h>
+#include <ModelAPI_BodyBuilder.h>
+#include <ModelAPI_Session.h>
+#include <ModelAPI_Validator.h>
+#include <ModelAPI_ResultConstruction.h>
+#include <ModelAPI_ResultBody.h>
+
+#include <GeomAlgoAPI_CompoundBuilder.h>
+#include <GeomAlgoAPI_ShapeTools.h>
+#include <GeomAPI_Edge.h>
+#include <GeomAPI_Lin.h>
+
+#include <sstream>
+#include <string> 
+
+namespace patch
+{
+	template < typename T > std::string to_string( const T& n )
+	{
+		std::ostringstream stm ;
+		stm << n ;
+		return stm.str() ;
+	}
+}
+
+//static ListOfShape makeProfileList(ObjectPtr theProfileObjRef);
+static ListOfShape makeProfileList(AttributeSelectionListPtr aFacesSelectionList);
+//=================================================================================================
+FeaturesPlugin_PipeApprox::FeaturesPlugin_PipeApprox()
+{
+}
+
+//=================================================================================================
+void FeaturesPlugin_PipeApprox::initAttributes()
+{
+	AttributeSelectionListPtr aSelection = 
+		std::dynamic_pointer_cast<ModelAPI_AttributeSelectionList>(data()->addAttribute(
+		PROFILE_ID(), ModelAPI_AttributeSelectionList::typeId()));
+	aSelection->setSelectionType("FACE");
+
+
+	data()->addAttribute(PATH_OBJECT_ID(), ModelAPI_AttributeSelection::typeId());
+	//data()->addAttribute(PATH_OBJECT_ID(), ModelAPI_AttributeSelectionList::typeId());
+	data()->addAttribute(BINORMAL_ID(), ModelAPI_AttributeSelection::typeId());
+
+	data()->addAttribute(LAW_REFERENCE_ID(), ModelAPI_AttributeSelection::typeId());
+	data()->addAttribute(LAW_DEFINITION_ID(), ModelAPI_AttributeSelection::typeId());
+
+	data()->addAttribute(CREATION_METHOD(), ModelAPI_AttributeString::typeId());
+
+}
+
+//=================================================================================================
+void FeaturesPlugin_PipeApprox::execute()
+{
+	// Getting creation method.
+	std::string aCreationMethod = string(CREATION_METHOD())->value();
+
+	//Getting path 
+	//limit to edge
+
+	std::shared_ptr<GeomAPI_Edge> aPath;
+	std::shared_ptr<ModelAPI_AttributeSelection> anObjRef = selection(PATH_OBJECT_ID());
+
+	if(anObjRef && anObjRef->value() && anObjRef->value()->isEdge()) {
+		aPath = std::shared_ptr<GeomAPI_Edge>(new GeomAPI_Edge(anObjRef->value()));
+	} else if(anObjRef->context() && anObjRef->context()->shape() && anObjRef->context()->shape()->isEdge()) {
+		aPath = std::shared_ptr<GeomAPI_Edge>(new GeomAPI_Edge(anObjRef->context()->shape()));
+	}
+	/*
+	//list of edge
+	ListOfShape aEdgesList;
+	AttributeSelectionListPtr aEdgesSelectionList = selectionList(PATH_OBJECT_ID());
+	for(int anIndex = 0; anIndex < aEdgesSelectionList->size(); anIndex++) {
+	AttributeSelectionPtr aEdgeSel = aEdgesSelectionList->value(anIndex);
+	std::shared_ptr<GeomAPI_Shape> aEdgeShape = aEdgeSel->value();
+	if(aEdgeShape.get() && !aEdgeShape->isNull()) { 
+	aEdgesList.push_back(aEdgeShape);
+	}
+	}
+	*/
+
+	//Getting profile
+	ListOfShape aFacesList;
+	AttributeSelectionListPtr aFacesSelectionList = selectionList(PROFILE_ID());
+	for(int anIndex = 0; anIndex < aFacesSelectionList->size(); anIndex++) {
+		AttributeSelectionPtr aFaceSel = aFacesSelectionList->value(anIndex);
+		std::shared_ptr<GeomAPI_Shape> aFaceShape = aFaceSel->value();
+		if(aFaceShape.get() && !aFaceShape->isNull()) { // Getting face.
+			aFacesList.push_back(aFaceShape);
+		} else { // This may be the whole sketch result selected, check and get faces.
+			ResultPtr aContext = aFaceSel->context();
+			std::shared_ptr<GeomAPI_Shape> aContextShape = aContext->shape();
+			if(!aContextShape.get()) {
+				static const std::string aContextError = "Error: The selection context is bad.";
+				setError(aContextError);
+				return;
+			}
+			ResultConstructionPtr aConstruction = std::dynamic_pointer_cast<ModelAPI_ResultConstruction>(aContext);
+			if(!aConstruction.get()) {
+				static const std::string aFaceError = "Error: Can not find basis for extrusion.";
+				setError(aFaceError);
+				return;
+			}
+			int aFacesNum = aConstruction->facesNum();
+			for(int aFaceIndex = 0; aFaceIndex < aFacesNum || aFacesNum == -1; aFaceIndex++) {
+				aFaceShape = std::dynamic_pointer_cast<GeomAPI_Shape>(aConstruction->face(aFaceIndex));
+				aFacesList.push_back(aFaceShape);
+			}
+		}
+	}
+
+	// Getting Bi-Normal
+	std::shared_ptr<GeomAPI_Shape> aBiNormal;
+	if(aCreationMethod == "binormal") {
+		AttributeSelectionPtr aBiNormalSelection = selection(BINORMAL_ID());
+		if(!aBiNormalSelection.get()) {
+			setError("Error: Bi-Normal selection is empty.");
+			return;
+		}
+		aBiNormal = std::dynamic_pointer_cast<GeomAPI_Shape>(aBiNormalSelection->value());
+		if(!aBiNormal.get()) {
+			// Probably it is a construction.
+			aBiNormal = aBiNormalSelection->context()->shape();
+		}
+		if(!aBiNormal.get() || aBiNormal->isNull()) {
+			setError("Error: Bi-Normal shape is null.");
+			return;
+		}
+	}
+
+	// Getting Ref and Def
+	std::shared_ptr<GeomAPI_Shape> aRef;
+	std::shared_ptr<GeomAPI_Shape> aDef;
+	if(aCreationMethod == "with law") {
+		//REFERENCE
+		AttributeSelectionPtr aRefSelection = selection(LAW_REFERENCE_ID());
+		if(!aRefSelection.get()) {
+			setError("Error: Ref selection is empty.");
+			return;
+		}
+		aRef = std::dynamic_pointer_cast<GeomAPI_Shape>(aRefSelection->value());
+		if(!aRef.get()) {
+			// Probably it is a construction.
+			aRef = aRefSelection->context()->shape();
+		}
+		if(!aRef.get() || aRef->isNull()) {
+			setError("Error: Ref shape is null.");
+			return;
+		}
+		//DEFINITION
+		AttributeSelectionPtr aDefSelection = selection(LAW_DEFINITION_ID());
+		if(!aDefSelection.get()) {
+			setError("Error: Def selection is empty.");
+			return;
+		}
+		aDef = std::dynamic_pointer_cast<GeomAPI_Shape>(aDefSelection->value());
+		if(!aDef.get()) {
+			// Probably it is a construction.
+			aDef = aDefSelection->context()->shape();
+		}
+		if(!aDef.get() || aDef->isNull()) {
+			setError("Error: Def shape is null.");
+			return;
+		}
+	}
+
+	// Generating result for each shell and face.
+	int aResultIndex = 0;
+	if(aCreationMethod == "simple" || aCreationMethod == "binormal" 
+		|| aCreationMethod == "with law") {
+			for(ListOfShape::const_iterator anIter = aFacesList.cbegin(); anIter != aFacesList.cend(); anIter++) {
+				std::shared_ptr<GeomAPI_Shape> aBaseShape = *anIter;
+				//std::shared_ptr<GeomAPI_Shape> aBaseShape = aFaceShape;
+				GeomAlgoAPI_PipeApprox aPipeApproxAlgo = GeomAlgoAPI_PipeApprox();
+				if(aCreationMethod == "simple"){
+					aPipeApproxAlgo = GeomAlgoAPI_PipeApprox(aBaseShape, aPath);
+				}else if(aCreationMethod == "binormal"){
+					aPipeApproxAlgo = GeomAlgoAPI_PipeApprox(aBaseShape, aPath, aBiNormal);
+				}else if(aCreationMethod == "with law"){
+					aPipeApproxAlgo = GeomAlgoAPI_PipeApprox(aBaseShape, aPath, aDef, aRef);
+				}
+
+
+				/*
+				GeomAlgoAPI_PipeApprox aPipeApproxAlgo = aCreationMethod == "simple" ? GeomAlgoAPI_PipeApprox(aBaseShape, aEdgesList) :
+				GeomAlgoAPI_PipeApprox(aBaseShape, aEdgesList, aBiNormal);
+				*/
+				if(!aPipeApproxAlgo.isDone()) {
+					static const std::string aPrismAlgoError = "Error: Pipe algorithm failed.";
+					setError(aPrismAlgoError);
+					aResultIndex = 0;
+					//break;
+				}
+				// Check if shape is valid
+				if(!aPipeApproxAlgo.shape().get() || aPipeApproxAlgo.shape()->isNull()) {
+					static const std::string aShapeError = "Error: Resulting shape is Null.";
+					setError(aShapeError);
+					aResultIndex = 0;
+					//break;
+				}
+				if(!aPipeApproxAlgo.isValid()) {
+					std::string aPrismAlgoError = "Error: Resulting shape is not valid.";
+					setError(aPrismAlgoError);
+					aResultIndex = 0;
+					//break;
+				}
+
+				ResultBodyPtr aResultBody = document()->createBody(data(), aResultIndex);
+				loadNamingDS(aPipeApproxAlgo, aResultBody, aBaseShape);
+				setResult(aResultBody, aResultIndex);
+				aResultIndex++;
+			}
+	}
+	removeResults(aResultIndex);
+}
+
+//=================================================================================================
+void FeaturesPlugin_PipeApprox::loadNamingDS(GeomAlgoAPI_PipeApprox& thePipeApproxAlgo,
+	std::shared_ptr<ModelAPI_ResultBody> theResultBody,
+	std::shared_ptr<GeomAPI_Shape> theBasis)
+{
+	//load result
+	theResultBody->storeGenerated(theBasis, thePipeApproxAlgo.shape());
+
+	std::shared_ptr<GeomAPI_DataMapOfShapeShape> aSubShapes = thePipeApproxAlgo.mapOfSubShapes();
+
+	//Insert lateral face : Face from Edge
+	const std::string aLatName = "LateralFace";
+	const int aLatTag = 1;
+	theResultBody->loadAndOrientGeneratedShapes(&thePipeApproxAlgo, theBasis, GeomAPI_Shape::EDGE, aLatTag, aLatName, *aSubShapes);
+
+	//Insert to faces
+	int aToFaceIndex = 1;
+	const std::string aToName = "ToFace";
+	int aToTag = 2;
+	const ListOfShape& aToFaces = thePipeApproxAlgo.toShapes();
+	for(ListOfShape::const_iterator anIt = aToFaces.cbegin(); anIt != aToFaces.cend(); anIt++) {
+		std::shared_ptr<GeomAPI_Shape> aToFace = *anIt;
+		if(aSubShapes->isBound(aToFace)) {
+			aToFace = aSubShapes->find(aToFace);
+		}
+		std::ostringstream aStr;
+		aStr << aToName << "_" << aToFaceIndex++;
+		theResultBody->generated(aToFace, aStr.str(), aToTag++);
+	}
+
+	//Insert from faces
+	int aFromFaceIndex = 1;
+	const std::string aFromName = "FromFace";
+	int aFromTag = aToTag > 10000 ? aToTag : 10000;
+	const ListOfShape& aFromFaces = thePipeApproxAlgo.fromShapes();
+	for(ListOfShape::const_iterator anIt = aFromFaces.cbegin(); anIt != aFromFaces.cend(); anIt++) {
+		std::shared_ptr<GeomAPI_Shape> aFromFace = *anIt;
+		if(aSubShapes->isBound(aFromFace)) {
+			aFromFace = aSubShapes->find(aFromFace);
+		}
+		std::ostringstream aStr;
+		aStr << aFromName << "_" << aFromFaceIndex++;
+		theResultBody->generated(aFromFace, aStr.str(), aFromTag++);
+	}
+}
+
+
+
+//ListOfShape makeProfileList(ObjectPtr theProfileObjRef){
+ListOfShape makeProfileList(AttributeSelectionListPtr aFacesSelectionList){
+	ListOfShape aFacesList;
+	//AttributeSelectionListPtr aFacesSelectionList = theProfileObjRef->data()->selectionList("profile");
+	for(int anIndex = 0; anIndex < aFacesSelectionList->size(); anIndex++) {
+		AttributeSelectionPtr aFaceSel = aFacesSelectionList->value(anIndex);
+		std::shared_ptr<GeomAPI_Shape> aFaceShape = aFaceSel->value();
+		if(aFaceShape.get() && !aFaceShape->isNull()) { // Getting face.
+			aFacesList.push_back(aFaceShape);
+		} else { // This may be the whole sketch result selected, check and get faces.
+			ResultPtr aContext = aFaceSel->context();
+			std::shared_ptr<GeomAPI_Shape> aContextShape = aContext->shape();
+			if(!aContextShape.get()) {
+				static const std::string aContextError = "Error: The selection context is bad.";
+				return aFacesList;
+			}
+			ResultConstructionPtr aConstruction = std::dynamic_pointer_cast<ModelAPI_ResultConstruction>(aContext);
+			if(!aConstruction.get()) {
+				static const std::string aFaceError = "Error: Can not find basis for extrusion.";
+				return aFacesList;
+			}
+			int aFacesNum = aConstruction->facesNum();
+			for(int aFaceIndex = 0; aFaceIndex < aFacesNum || aFacesNum == -1; aFaceIndex++) {
+				aFaceShape = std::dynamic_pointer_cast<GeomAPI_Shape>(aConstruction->face(aFaceIndex));
+				aFacesList.push_back(aFaceShape);
+			}
+		}
+	}
+
+	return aFacesList;
+}
diff --git a/src/FeaturesPlugin/FeaturesPlugin_PipeApprox.h b/src/FeaturesPlugin/FeaturesPlugin_PipeApprox.h
new file mode 100644
index 000000000..b742ae330
--- /dev/null
+++ b/src/FeaturesPlugin/FeaturesPlugin_PipeApprox.h
@@ -0,0 +1,105 @@
+// Copyright
+
+// File:        FeaturesPlugin_PipeApprox.h
+
+
+#ifndef FeaturesPlugin_PipeApprox_H_
+#define FeaturesPlugin_PipeApprox_H_
+
+#include <FeaturesPlugin.h>
+
+#include <GeomAlgoAPI_PipeApprox.h>
+#include <ModelAPI_Feature.h>
+#include <ModelAPI_AttributeSelection.h>
+#include <ModelAPI_AttributeSelectionList.h>
+#include <ModelAPI_Attribute.h>
+#include <ModelAPI_ResultBody.h>
+
+#include <memory>
+#include <list>
+
+class GeomAPI_Shape;
+class ModelAPI_ResultBody;
+
+/** \class FeaturesPlugin_Pipe
+ *  \ingroup Plugins
+ *  \brief Feature for creation of Pipe from the planar face.
+ *  Pipe creates the lateral faces based on edges of the base face and
+ *  the start and end faces and/or start and end angles.
+ */
+class FeaturesPlugin_PipeApprox : public ModelAPI_Feature
+{
+ public:
+  /// Pipe kind.
+  inline static const std::string& ID()
+  {
+    static const std::string MY_PipeApprox_ID("PipeApprox");
+    return MY_PipeApprox_ID;
+  }
+
+  /// Attribute name of references sketch entities list, it should contain a sketch result or
+  /// a pair a sketch result to sketch face.
+  inline static const std::string& PROFILE_ID()
+  {
+    static const std::string MY_PROFILE_LIST_ID("profile");
+    return MY_PROFILE_LIST_ID;
+  }
+
+  /// Attribute name of an Pipe path.
+  inline static const std::string& PATH_OBJECT_ID()
+  {
+    static const std::string MY_PATH_ID("path_object");
+    return MY_PATH_ID;
+  }
+
+  /// Attribute name of Bi-Normal.
+  inline static const std::string& BINORMAL_ID()
+  {
+    static const std::string MY_BINORMAL_ID("binormal");
+    return MY_BINORMAL_ID;
+  }
+
+  inline static const std::string& LAW_REFERENCE_ID()
+  {
+    static const std::string MY_LAW_REFERENCE_ID("law_reference");
+    return MY_LAW_REFERENCE_ID;
+  }
+
+  inline static const std::string& LAW_DEFINITION_ID()
+  {
+    static const std::string MY_LAW_DEFINITION_ID("law_definition");
+    return MY_LAW_DEFINITION_ID;
+  }
+
+  /// attribute name for creation method
+  inline static const std::string& CREATION_METHOD()
+  {
+    static const std::string METHOD_ATTR("CreationMethod");
+    return METHOD_ATTR;
+  }
+
+
+  /// \return the kind of a feature.
+  FEATURESPLUGIN_EXPORT virtual const std::string& getKind()
+  {
+    static std::string MY_KIND = FeaturesPlugin_PipeApprox::ID();
+    return MY_KIND;
+  }
+
+  /// Creates a new part document if needed.
+  FEATURESPLUGIN_EXPORT virtual void execute();
+
+  /// Request for initialization of data model of the feature: adding all attributes.
+  FEATURESPLUGIN_EXPORT virtual void initAttributes();
+
+  /// Use plugin manager for features creation.
+  FeaturesPlugin_PipeApprox();
+
+private:
+  /// Load Naming data structure of the feature to the document.
+  void loadNamingDS(GeomAlgoAPI_PipeApprox& thePipeApproxAlgo,
+                    std::shared_ptr<ModelAPI_ResultBody> theResultBody,
+                    std::shared_ptr<GeomAPI_Shape> theBasis);
+
+};
+#endif
diff --git a/src/FeaturesPlugin/FeaturesPlugin_PipeApproxLaw.cpp b/src/FeaturesPlugin/FeaturesPlugin_PipeApproxLaw.cpp
new file mode 100644
index 000000000..a23b9ee78
--- /dev/null
+++ b/src/FeaturesPlugin/FeaturesPlugin_PipeApproxLaw.cpp
@@ -0,0 +1,460 @@
+// Copyright
+
+// File:        FeaturesPlugin_PipeApproxLaw.cpp
+
+//TODO: SORT ALL THE INCLUDES
+#include "FeaturesPlugin_PipeApproxLaw.h"
+
+#include <FeaturesPlugin_ParameterLaw.h>
+#include <ModelAPI_CompositeFeature.h>
+#include <ModelAPI_AttributeBoolean.h>
+#include <ModelAPI_AttributeInteger.h>
+#include <ModelAPI_Tools.h>
+#include <ModelAPI_Attribute.h>
+#include <ModelAPI_Object.h>
+#include <Events_Loop.h>
+#include <ModelAPI_Events.h>
+//??#include "ParametersPlugin_Parameter.h"
+//??#include <SketchPlugin_SketchEntity.h>
+#include <ModelAPI_AttributeDouble.h>
+#include <ModelAPI_AttributeSelectionList.h>
+#include <ModelAPI_AttributeSelection.h>
+#include <ModelAPI_AttributeString.h>
+#include <ModelAPI_BodyBuilder.h>
+#include <ModelAPI_Session.h>
+#include <ModelAPI_Validator.h>
+#include <ModelAPI_ResultConstruction.h>
+#include <ModelAPI_ResultBody.h>
+
+#include <GeomAlgoAPI_CompoundBuilder.h>
+#include <GeomAlgoAPI_ShapeTools.h>
+#include <GeomAPI_Edge.h>
+#include <GeomAPI_Lin.h>
+
+#include <sstream>
+
+namespace patch
+{
+	template < typename T > std::string to_string( const T& n )
+	{
+		std::ostringstream stm ;
+		stm << n ;
+		return stm.str() ;
+	}
+}
+
+
+static ListOfShape makeProfileList(AttributeSelectionListPtr aFacesSelectionList);
+
+
+//for splitting string
+std::vector<std::string> &split(const std::string &s, char delim, std::vector<std::string> &elems) {
+	std::stringstream ss(s);
+	std::string item;
+	while (std::getline(ss, item, delim)) {
+		elems.push_back(item);
+	}
+	return elems;
+}
+
+std::vector<std::string> split(const std::string &s, char delim) {
+	std::vector<std::string> elems;
+	split(s, delim, elems);
+	return elems;
+}
+
+
+//=================================================================================================
+FeaturesPlugin_PipeApproxLaw::FeaturesPlugin_PipeApproxLaw()
+{
+}
+
+//=================================================================================================
+void FeaturesPlugin_PipeApproxLaw::initAttributes()
+{
+	mySelection = 
+		std::dynamic_pointer_cast<ModelAPI_AttributeSelectionList>(data()->addAttribute(
+		PROFILE_ID(), ModelAPI_AttributeSelectionList::typeId()));
+	mySelection->setSelectionType("FACE");
+	mySelection->setImmutable(false);
+
+	data()->addAttribute(PATH_OBJECT_ID(), ModelAPI_AttributeSelection::typeId());
+	data()->addAttribute(BINORMAL_ID(), ModelAPI_AttributeSelection::typeId());
+
+
+	myParameter = data()->addAttribute(VARIABLE_ID(), ModelAPI_AttributeSelectionList::typeId());
+	data()->addAttribute(NBSECT_ID(), ModelAPI_AttributeInteger::typeId());
+	data()->addAttribute(REVERSE_ID(), ModelAPI_AttributeBoolean::typeId());
+	data()->addAttribute(FRENET_ID(), ModelAPI_AttributeBoolean::typeId());
+	data()->addAttribute(CREATION_METHOD(), ModelAPI_AttributeString::typeId());
+
+}
+
+//=================================================================================================
+void FeaturesPlugin_PipeApproxLaw::performSketchIteration()
+{
+	for(int i = 0; i < myNbLaws; i++){ 		
+		const std::string & theValue = patch::to_string(myIterationMOI[i][myCPT]); //it -> devient compteur sur le vect
+		FeaturePtr aIterationParamFeature = ModelAPI_Feature::feature(myVectResultParameterPtr[i]);
+		aIterationParamFeature->data()->string("expression")->setValue(theValue);
+	}
+}
+
+//=================================================================================================
+void FeaturesPlugin_PipeApproxLaw::getParamLaws(GeomAlgoAPI_ParameterLaw& aParameterLawAlgo)
+{
+	ObjectPtr aFeatureObj = mySelection->owner();
+	DocumentPtr aDocument = aFeatureObj->document();
+
+	bool haveParam;
+
+	AttributeSelectionListPtr aLawsSelectionList = selectionList(VARIABLE_ID());
+	myNbLaws = aLawsSelectionList->size();
+
+	for(int i = 0; i < myNbLaws; i++){
+		AttributeSelectionPtr aFaceSel = aLawsSelectionList->value(i);
+		ObjectPtr aLawObj = aFaceSel->context();
+		FeaturePtr aLawFeature = ModelAPI_Feature::feature(aLawObj);
+
+		//check existence of the laws
+		haveParam = false;
+
+		//get the param, and the def and ref curves
+		std::string aParameterName = aLawFeature->data()->string(FeaturesPlugin_ParameterLaw::VARIABLE_ID())->value();
+
+		int anIndex2 = 0, aSize2 = aDocument->size(ModelAPI_ResultParameter::group());
+		ObjectPtr aParamObj = aDocument->object(ModelAPI_ResultParameter::group(), anIndex2);
+
+		while(anIndex2 < aSize2 && aParamObj->data()->name() != aParameterName){
+			anIndex2++;
+			aParamObj = aDocument->object(ModelAPI_ResultParameter::group(), anIndex2);
+		}
+		if(aParamObj->data()->name() == aParameterName)
+		{
+			ResultParameterPtr aParam = std::dynamic_pointer_cast<ModelAPI_ResultParameter>(aParamObj);
+			if (aParam.get()){
+				FeaturePtr aFeature = ModelAPI_Feature::feature(aParam);
+				haveParam = (aFeature != myParameter->owner());
+			}
+		}
+		ResultParameterPtr aParam;
+		if (haveParam) {
+			aParam = std::dynamic_pointer_cast<ModelAPI_ResultParameter>(aParamObj);
+			haveParam = aParam.get() != NULL;
+		}
+		if(!haveParam)
+		{
+			break;
+		}else{
+			myVectResultParameterPtr.push_back(aParam);
+
+			bool isReverse = 
+				aLawFeature->data()->boolean(FeaturesPlugin_ParameterLaw::REVERSE_ID())->value();
+			std::shared_ptr<GeomAPI_Shape> aDef = 
+				aLawFeature->data()->selection(FeaturesPlugin_ParameterLaw::LAW_DEFINITION_ID())->value();
+
+			std::shared_ptr<GeomAPI_Shape> aRef = 
+				aLawFeature->data()->selection(FeaturesPlugin_ParameterLaw::LAW_REFERENCE_ID())->value();
+
+			std::vector<double> tempVec = aParameterLawAlgo.getVectorOfScalar(aDef, aRef, isReverse, myNbSections);
+			myIterationMOI.insert(std::pair<int, std::vector<double>>(i, tempVec));
+		}
+	}
+}
+
+//=================================================================================================
+bool FeaturesPlugin_PipeApproxLaw::checkParamLaws()
+{
+	ObjectPtr aFeatureObj = mySelection->owner();
+	DocumentPtr aDocument = aFeatureObj->document();
+
+	bool res;
+
+	AttributeSelectionListPtr aLawsSelectionList = selectionList(VARIABLE_ID());
+	myNbLaws = aLawsSelectionList->size();
+
+	for(int i = 0; i < myNbLaws; i++){
+		AttributeSelectionPtr aFaceSel = aLawsSelectionList->value(i);
+
+		ObjectPtr aLawObj = aFaceSel->context();
+		FeaturePtr aLawFeature = ModelAPI_Feature::feature(aLawObj);
+		//check existence of the laws
+
+		res = false;
+
+		std::string aParameterName = aLawFeature->data()->string(FeaturesPlugin_ParameterLaw::VARIABLE_ID())->value();
+
+		int anIndex2 = 0, aSize2 = aDocument->size(ModelAPI_ResultParameter::group());
+		ObjectPtr aParamObj = aDocument->object(ModelAPI_ResultParameter::group(), anIndex2);
+
+		while(anIndex2 < aSize2 && aParamObj->data()->name() != aParameterName){
+			anIndex2++;
+			aParamObj = aDocument->object(ModelAPI_ResultParameter::group(), anIndex2);
+		}
+		if(aParamObj->data()->name() == aParameterName)
+		{
+			ResultParameterPtr aParam = std::dynamic_pointer_cast<ModelAPI_ResultParameter>(aParamObj);
+			if (aParam.get()){
+				FeaturePtr aFeature = ModelAPI_Feature::feature(aParam);
+
+				res = (aFeature != myParameter->owner());
+			}
+		}
+		ResultParameterPtr aParam;
+
+		if (res) {
+			aParam = std::dynamic_pointer_cast<ModelAPI_ResultParameter>(aParamObj);
+
+			res = aParam.get() != NULL;
+		}
+	}
+	return res;
+}
+
+//=================================================================================================
+void FeaturesPlugin_PipeApproxLaw::execute()
+{
+	int cpt = 0;
+	if (!myIterationMOI.empty()) { // iteration is performed
+		// do the iteration
+		// get the updated sketch
+
+		AttributeSelectionPtr aUpdatedShapeSel = myIterationUpdatedFacesSelectionList->value(cpt);
+		std::shared_ptr<GeomAPI_Shape> aUpdatedShape = aUpdatedShapeSel->value();
+		myIterationLOS.push_back(aUpdatedShape);
+
+		myCPT--;
+
+
+		if (myCPT >= 0) {
+			// set new param to update sketch
+			performSketchIteration();
+			return; // the execution will be called again with an updated sketch
+		} else {
+			myIterationMOI.clear(); // finish the iteration
+		}
+	}
+
+	// Getting creation method.
+	std::string aCreationMethod = string(CREATION_METHOD())->value();
+
+	// Flags for reverse path
+	bool isReverse = boolean(REVERSE_ID())->value();
+
+	// Flags for min torsion
+	bool withFrenet = boolean(FRENET_ID())->value();
+
+	// Getting nb sections.
+	myNbSections = integer(NBSECT_ID())->value();
+
+
+	// Getting path.
+	AttributeSelectionPtr aPathSelection = selection(PATH_OBJECT_ID());
+	if(!aPathSelection.get()) {
+		setError("Error: Path selection is empty.");
+		return;
+	}
+	std::shared_ptr<GeomAPI_Shape> aPathShape = std::dynamic_pointer_cast<GeomAPI_Shape>(aPathSelection->value());
+	if(!aPathShape.get()) {
+		// Probaply it is a construction.
+		aPathShape = aPathSelection->context()->shape();
+	}
+	if(!aPathShape.get() || aPathShape->isNull()) {
+		setError("Error: Path shape is null.");
+		return;
+	}
+
+	//Getting profile
+	ListOfShape aFacesList;
+	AttributeSelectionListPtr aFacesSelectionList = selectionList(PROFILE_ID());
+	for(int anIndex = 0; anIndex < aFacesSelectionList->size(); anIndex++) {
+		AttributeSelectionPtr aFaceSel = aFacesSelectionList->value(anIndex);
+		std::shared_ptr<GeomAPI_Shape> aFaceShape = aFaceSel->value();
+		if(aFaceShape.get() && !aFaceShape->isNull()) { // Getting face.
+			aFacesList.push_back(aFaceShape);
+		} else { // This may be the whole sketch result selected, check and get faces.
+			ResultPtr aContext = aFaceSel->context();
+			std::shared_ptr<GeomAPI_Shape> aContextShape = aContext->shape();
+			if(!aContextShape.get()) {
+				static const std::string aContextError = "Error: The selection context is bad.";
+				setError(aContextError);
+				return;
+			}
+			ResultConstructionPtr aConstruction = std::dynamic_pointer_cast<ModelAPI_ResultConstruction>(aContext);
+			if(!aConstruction.get()) {
+				static const std::string aFaceError = "Error: Can not find basis for extrusion.";
+				setError(aFaceError);
+				return;
+			}
+			int aFacesNum = aConstruction->facesNum();
+			for(int aFaceIndex = 0; aFaceIndex < aFacesNum || aFacesNum == -1; aFaceIndex++) {
+				aFaceShape = std::dynamic_pointer_cast<GeomAPI_Shape>(aConstruction->face(aFaceIndex));
+				aFacesList.push_back(aFaceShape);
+			}
+		}
+	}
+
+
+	// Getting Bi-Normal
+
+	std::shared_ptr<GeomAPI_Shape> aBiNormal;
+	if(aCreationMethod == "with binormal") {
+		AttributeSelectionPtr aBiNormalSelection = selection(BINORMAL_ID());
+		if(!aBiNormalSelection.get()) {
+			setError("Error: Bi-Normal selection is empty.");
+			return;
+		}
+		aBiNormal = std::dynamic_pointer_cast<GeomAPI_Shape>(aBiNormalSelection->value());
+		if(!aBiNormal.get()) {
+			// Probably it is a construction.
+			aBiNormal = aBiNormalSelection->context()->shape();
+		}
+		if(!aBiNormal.get() || aBiNormal->isNull()) {
+			setError("Error: Bi-Normal shape is null.");
+			return;
+		}
+	}
+
+	// Generating result for each shell and face.
+	int aResultIndex = 0;
+	//this is "fake" for loop
+	//we expect to only treat one face
+	//think I need the selectionlist to have access to sketch, not sure
+	for(ListOfShape::const_iterator anIter = aFacesList.cbegin(); anIter != aFacesList.cend(); anIter++) {
+		std::shared_ptr<GeomAPI_Shape> aBaseShape = *anIter;
+		GeomAlgoAPI_PipeApprox aPipeApproxLawAlgo = GeomAlgoAPI_PipeApprox();
+		GeomAlgoAPI_ParameterLaw aParameterLawAlgo = GeomAlgoAPI_ParameterLaw();
+
+		ObjectPtr aFeatureObj = mySelection->owner();
+		DocumentPtr aDocument = aFeatureObj->document();
+		if(checkParamLaws())
+		{
+			if (myIterationLOS.empty()) { // starts the iteration
+				myCPT = myNbSections - 1;
+				getParamLaws(aParameterLawAlgo);
+				myIterationUpdatedFacesSelectionList = aFeatureObj->data()->selectionList(PROFILE_ID());
+				// init the iteration by first modification of the sketch
+				performSketchIteration();
+				return;
+			} else {  // perform the algo on already computed contours in the previous iteration
+				if(aCreationMethod == "simple"){
+					aPipeApproxLawAlgo = GeomAlgoAPI_PipeApprox(myIterationLOS, aPathShape, isReverse, myNbSections, withFrenet);
+				}
+				if(aCreationMethod == "with binormal"){
+					aPipeApproxLawAlgo = GeomAlgoAPI_PipeApprox(myIterationLOS, aPathShape, aBiNormal, isReverse, myNbSections/*, crossSections*/);
+				}
+				myIterationLOS.clear();
+				myCPT = myNbSections - 1;
+			}
+		}
+
+
+		if(!aPipeApproxLawAlgo.isDone()) {
+			static const std::string aPrismAlgoError = "Error: Pipe algorithm failed.";
+			setError(aPrismAlgoError);
+			aResultIndex = 0;
+			//break;
+		}
+		// Check if shape is valid
+		if(!aPipeApproxLawAlgo.shape().get() || aPipeApproxLawAlgo.shape()->isNull()) {
+			static const std::string aShapeError = "Error: Resulting shape is Null.";
+			setError(aShapeError);
+			aResultIndex = 0;
+			//break;
+		}
+		if(!aPipeApproxLawAlgo.isValid()) {
+			std::string aPrismAlgoError = "Error: Resulting shape is not valid.";
+			setError(aPrismAlgoError);
+			aResultIndex = 0;
+			//break;
+		}
+
+		ResultBodyPtr aResultBody = document()->createBody(data(), aResultIndex);
+		loadNamingDS(aPipeApproxLawAlgo, aResultBody, aBaseShape);
+		setResult(aResultBody, aResultIndex);
+		aResultIndex++;
+
+		cpt++;
+	}
+
+	removeResults(aResultIndex);
+
+}
+
+//=================================================================================================
+void FeaturesPlugin_PipeApproxLaw::loadNamingDS(GeomAlgoAPI_PipeApprox& thePipeApproxLawAlgo,
+	std::shared_ptr<ModelAPI_ResultBody> theResultBody,
+	std::shared_ptr<GeomAPI_Shape> theBasis)
+{
+	//load result
+	theResultBody->storeGenerated(theBasis, thePipeApproxLawAlgo.shape());
+
+	std::shared_ptr<GeomAPI_DataMapOfShapeShape> aSubShapes = thePipeApproxLawAlgo.mapOfSubShapes();
+
+	//Insert lateral face : Face from Edge
+	const std::string aLatName = "LateralFace";
+	const int aLatTag = 1;
+	theResultBody->loadAndOrientGeneratedShapes(&thePipeApproxLawAlgo, theBasis, GeomAPI_Shape::EDGE, aLatTag, aLatName, *aSubShapes);
+
+	//Insert to faces
+	int aToFaceIndex = 1;
+	const std::string aToName = "ToFace";
+	int aToTag = 2;
+	const ListOfShape& aToFaces = thePipeApproxLawAlgo.toShapes();
+	for(ListOfShape::const_iterator anIt = aToFaces.cbegin(); anIt != aToFaces.cend(); anIt++) {
+		std::shared_ptr<GeomAPI_Shape> aToFace = *anIt;
+		if(aSubShapes->isBound(aToFace)) {
+			aToFace = aSubShapes->find(aToFace);
+		}
+		std::ostringstream aStr;
+		aStr << aToName << "_" << aToFaceIndex++;
+		theResultBody->generated(aToFace, aStr.str(), aToTag++);
+	}
+
+	//Insert from faces
+	int aFromFaceIndex = 1;
+	const std::string aFromName = "FromFace";
+	int aFromTag = aToTag > 10000 ? aToTag : 10000;
+	const ListOfShape& aFromFaces = thePipeApproxLawAlgo.fromShapes();
+	for(ListOfShape::const_iterator anIt = aFromFaces.cbegin(); anIt != aFromFaces.cend(); anIt++) {
+		std::shared_ptr<GeomAPI_Shape> aFromFace = *anIt;
+		if(aSubShapes->isBound(aFromFace)) {
+			aFromFace = aSubShapes->find(aFromFace);
+		}
+		std::ostringstream aStr;
+		aStr << aFromName << "_" << aFromFaceIndex++;
+		theResultBody->generated(aFromFace, aStr.str(), aFromTag++);
+	}
+}
+
+
+
+ListOfShape makeProfileList(AttributeSelectionListPtr aFacesSelectionList){
+	ListOfShape aFacesList;
+	for(int anIndex = 0; anIndex < aFacesSelectionList->size(); anIndex++) {
+		AttributeSelectionPtr aFaceSel = aFacesSelectionList->value(anIndex);
+		std::shared_ptr<GeomAPI_Shape> aFaceShape = aFaceSel->value();
+		if(aFaceShape.get() && !aFaceShape->isNull()) { // Getting face.
+			aFacesList.push_back(aFaceShape);
+		} else { // This may be the whole sketch result selected, check and get faces.
+			ResultPtr aContext = aFaceSel->context();
+			std::shared_ptr<GeomAPI_Shape> aContextShape = aContext->shape();
+			if(!aContextShape.get()) {
+				static const std::string aContextError = "Error: The selection context is bad.";
+				return aFacesList;
+			}
+			ResultConstructionPtr aConstruction = std::dynamic_pointer_cast<ModelAPI_ResultConstruction>(aContext);
+			if(!aConstruction.get()) {
+				static const std::string aFaceError = "Error: Can not find basis for extrusion.";
+				return aFacesList;
+			}
+			int aFacesNum = aConstruction->facesNum();
+			for(int aFaceIndex = 0; aFaceIndex < aFacesNum || aFacesNum == -1; aFaceIndex++) {
+				aFaceShape = std::dynamic_pointer_cast<GeomAPI_Shape>(aConstruction->face(aFaceIndex));
+				aFacesList.push_back(aFaceShape);
+			}
+		}
+	}
+
+	return aFacesList;
+}
diff --git a/src/FeaturesPlugin/FeaturesPlugin_PipeApproxLaw.h b/src/FeaturesPlugin/FeaturesPlugin_PipeApproxLaw.h
new file mode 100644
index 000000000..7c575176c
--- /dev/null
+++ b/src/FeaturesPlugin/FeaturesPlugin_PipeApproxLaw.h
@@ -0,0 +1,146 @@
+// Copyright
+
+// File:        FeaturesPlugin_PipeApproxLaw.h
+
+
+#ifndef FeaturesPlugin_PipeApproxLaw_H_
+#define FeaturesPlugin_PipeApproxLaw_H_
+
+#include <FeaturesPlugin.h>
+
+#include <GeomAlgoAPI_PipeApprox.h>
+#include <GeomAlgoAPI_ParameterLaw.h>
+#include <ModelAPI_Feature.h>
+#include <ModelAPI_ResultParameter.h>
+#include <ModelAPI_AttributeSelection.h>
+#include <ModelAPI_AttributeSelectionList.h>
+#include <ModelAPI_Attribute.h>
+#include <ModelAPI_ResultBody.h>
+
+#include <memory>
+#include <list>
+#include <vector>
+#include <map>
+#include <string> 
+
+class GeomAPI_Shape;
+class ModelAPI_ResultBody;
+
+/** \class FeaturesPlugin_Pipe
+ *  \ingroup Plugins
+ *  \brief Feature for creation of Pipe from the planar face.
+ *  Pipe creates the lateral faces based on edges of the base face and
+ *  the start and end faces and/or start and end angles.
+ */
+class FeaturesPlugin_PipeApproxLaw : public ModelAPI_Feature
+{
+ public:
+  /// Pipe kind.
+  inline static const std::string& ID()
+  {
+    static const std::string MY_PipeApproxLaw_ID("PipeApproxLaw");
+    return MY_PipeApproxLaw_ID;
+  }
+
+  /// Attribute name of references sketch entities list, it should contain a sketch result or
+  /// a pair a sketch result to sketch face.
+  inline static const std::string& PROFILE_ID()
+  {
+    static const std::string MY_PROFILE_LIST_ID("profile");
+    return MY_PROFILE_LIST_ID;
+  }
+
+  /// Attribute name of an Pipe path.
+  inline static const std::string& PATH_OBJECT_ID()
+  {
+    static const std::string MY_PATH_ID("path_object");
+    return MY_PATH_ID;
+  }
+
+  /// Attribute name of Bi-Normal.
+  inline static const std::string& BINORMAL_ID()
+  {
+    static const std::string MY_BINORMAL_ID("binormal");
+    return MY_BINORMAL_ID;
+  }
+
+  /// Attribute name of ParmLaws
+  inline static const std::string& VARIABLE_ID()
+  {
+    static const std::string MY_VARIABLE_ID("Parameter_laws");
+    return MY_VARIABLE_ID;
+  }
+
+  /// Attribute name of nb cross-sections
+  inline static const std::string& NBSECT_ID()
+  {
+    static const std::string MY_NBSECT_ID("nb_sect");
+    return MY_NBSECT_ID;
+  }
+
+  /// attribute name of flag of minimizetorsion
+  inline static const std::string& FRENET_ID()
+  {
+    static const std::string MY_FRENET_ID("use_Frenet");
+    return MY_FRENET_ID;
+  }
+  
+  /// attribute name of flag of reverse direction
+  inline static const std::string& REVERSE_ID()
+  {
+    static const std::string MY_REVERSE_ID("reverse_direction");
+    return MY_REVERSE_ID;
+  }
+
+  /// attribute name for creation method
+  inline static const std::string& CREATION_METHOD()
+  {
+    static const std::string METHOD_ATTR("CreationMethod");
+    return METHOD_ATTR;
+  }
+
+
+  /// \return the kind of a feature.
+  FEATURESPLUGIN_EXPORT virtual const std::string& getKind()
+  {
+    static std::string MY_KIND = FeaturesPlugin_PipeApproxLaw::ID();
+    return MY_KIND;
+  }
+
+  /// Creates a new part document if needed.
+  FEATURESPLUGIN_EXPORT virtual void execute();
+
+  /// Request for initialization of data model of the feature: adding all attributes.
+  FEATURESPLUGIN_EXPORT virtual void initAttributes();
+
+  /// Use plugin manager for features creation.
+  FeaturesPlugin_PipeApproxLaw();
+
+private:
+  /// Load Naming data structure of the feature to the document.
+  void loadNamingDS(GeomAlgoAPI_PipeApprox& thePipeApproxLawAlgo,
+                    std::shared_ptr<ModelAPI_ResultBody> theResultBody,
+                    std::shared_ptr<GeomAPI_Shape> theBasis);
+
+  /// does the update of sketch that will call "execution" of this feature
+  void performSketchIteration();
+
+  bool checkParamLaws();
+  void FeaturesPlugin_PipeApproxLaw::getParamLaws(GeomAlgoAPI_ParameterLaw& aParameterLawAlgo);
+
+  AttributeSelectionListPtr mySelection;
+  AttributePtr myParameter;
+
+  /// fields needed for iteration of updated sketch
+  std::map<int, std::vector<double>> myIterationMOI; ///< empty means iteration is not started
+
+  std::vector<ResultParameterPtr> myVectResultParameterPtr;
+  
+  AttributeSelectionListPtr myIterationUpdatedFacesSelectionList;
+  ListOfShape myIterationLOS;
+  
+  int myCPT;
+  int myNbLaws;
+  int myNbSections;
+};
+#endif
diff --git a/src/FeaturesPlugin/FeaturesPlugin_Plugin.cpp b/src/FeaturesPlugin/FeaturesPlugin_Plugin.cpp
index 54b0021f0..0f210e69b 100644
--- a/src/FeaturesPlugin/FeaturesPlugin_Plugin.cpp
+++ b/src/FeaturesPlugin/FeaturesPlugin_Plugin.cpp
@@ -21,6 +21,10 @@
 #include <FeaturesPlugin_ValidatorTransform.h>
 #include <FeaturesPlugin_Validators.h>
 
+#include <FeaturesPlugin_PipeApprox.h>
+#include <FeaturesPlugin_PipeApproxLaw.h>
+#include <FeaturesPlugin_ParameterLaw.h>
+
 #include <ModelAPI_Session.h>
 
 #include <string>
@@ -60,6 +64,8 @@ FeaturesPlugin_Plugin::FeaturesPlugin_Plugin()
                               new FeaturesPlugin_ValidatorUnionSelection);
   aFactory->registerValidator("FeaturesPlugin_ValidatorUnionArguments",
                               new FeaturesPlugin_ValidatorUnionArguments);
+  aFactory->registerValidator("FeaturesPlugin_ValidatorParameterLaw",
+	                          new FeaturesPlugin_ValidatorParameterLaw);
 
   // register this plugin
   ModelAPI_Session::get()->registerPlugin(this);
@@ -99,6 +105,12 @@ FeaturePtr FeaturesPlugin_Plugin::createFeature(string theFeatureID)
     return FeaturePtr(new FeaturesPlugin_RemoveSubShapes);
   } else if (theFeatureID == FeaturesPlugin_Union::ID()) {
     return FeaturePtr(new FeaturesPlugin_Union);
+  } else if (theFeatureID == FeaturesPlugin_ParameterLaw::ID()) {
+    return FeaturePtr(new FeaturesPlugin_ParameterLaw);
+  }else if (theFeatureID == FeaturesPlugin_PipeApproxLaw::ID()) {
+    return FeaturePtr(new FeaturesPlugin_PipeApproxLaw);
+  }else if (theFeatureID == FeaturesPlugin_PipeApprox::ID()) {
+    return FeaturePtr(new FeaturesPlugin_PipeApprox);
   }
 
   // feature of such kind is not found
diff --git a/src/FeaturesPlugin/FeaturesPlugin_Validators.cpp b/src/FeaturesPlugin/FeaturesPlugin_Validators.cpp
index c77f516b6..b0b4cba2d 100644
--- a/src/FeaturesPlugin/FeaturesPlugin_Validators.cpp
+++ b/src/FeaturesPlugin/FeaturesPlugin_Validators.cpp
@@ -782,3 +782,49 @@ bool FeaturesPlugin_ValidatorUnionArguments::isNotObligatory(std::string theFeat
 {
   return false;
 }
+
+//==================================================================================================
+bool FeaturesPlugin_ValidatorParameterLaw::isValid(const AttributePtr& theAttribute,
+                                                        const std::list<std::string>& theArguments,
+                                                        Events_InfoMessage& theError) const
+{
+	//SEEMS THIS DOES NOTHING SPECIAL!!
+  bool isLawValid = true;
+  //if(theArguments.empty()) {
+  //  theError = "Error: Validator parameters is empty.";
+  //  return false;
+  //}
+  std::string anAttributeType = theAttribute->attributeType();
+  std::string anAttirbuteID = theAttribute->id();
+  if (anAttributeType == ModelAPI_AttributeSelectionList::typeId()) {
+    AttributeSelectionListPtr aSelectionListAttr = 
+                      std::dynamic_pointer_cast<ModelAPI_AttributeSelectionList>(theAttribute);
+    // all context objects should be sketch entities
+    for (int i = 0, aSize = aSelectionListAttr->size(); i < aSize ; i++) {
+      AttributeSelectionPtr aSelectAttr = aSelectionListAttr->value(i);
+      ObjectPtr anObject = aSelectAttr->context();
+      if (!anObject.get())
+        isLawValid = false;
+      else {
+        FeaturePtr aFeature = ModelAPI_Feature::feature(anObject);
+        isLawValid = true;
+      }
+    }
+  }
+  if (anAttributeType == ModelAPI_AttributeSelection::typeId()) {
+    AttributeSelectionPtr aSelectAttr = 
+                      std::dynamic_pointer_cast<ModelAPI_AttributeSelection>(theAttribute);
+    ObjectPtr anObject = aSelectAttr->context();
+    // a context of the selection attribute is a feature result. It can be a case when the result
+    // of the feature is null, e.g. the feature is modified and has not been executed yet.
+    // The validator returns an invalid result here. The case is an extrusion built on a sketch
+    // feature. A new sketch element creation leads to an empty result.
+    if (!anObject.get())
+      isLawValid = false;
+    else {
+      FeaturePtr aFeature = ModelAPI_Feature::feature(anObject);
+	  isLawValid = true;
+	}
+  }
+  return isLawValid;
+}
\ No newline at end of file
diff --git a/src/FeaturesPlugin/FeaturesPlugin_Validators.h b/src/FeaturesPlugin/FeaturesPlugin_Validators.h
index ce3fe042e..4f853042d 100644
--- a/src/FeaturesPlugin/FeaturesPlugin_Validators.h
+++ b/src/FeaturesPlugin/FeaturesPlugin_Validators.h
@@ -202,4 +202,15 @@ class FeaturesPlugin_ValidatorUnionArguments: public ModelAPI_FeatureValidator
   virtual bool isNotObligatory(std::string theFeature, std::string theAttribute);
 };
 
+class FeaturesPlugin_ValidatorParameterLaw: public ModelAPI_AttributeValidator
+{
+public:
+  //! \return true if attribute has selection type listed in the parameter arguments.
+  //! \param[in] theAttribute the checked attribute.
+  //! \param[in] theArguments arguments of the attribute.
+  //! \param[out] theError error message.
+   virtual bool isValid(const AttributePtr& theAttribute,
+                        const std::list<std::string>& theArguments,
+                        Events_InfoMessage& theError) const;
+};
 #endif
diff --git a/src/FeaturesPlugin/parameterlaw_widget.xml b/src/FeaturesPlugin/parameterlaw_widget.xml
new file mode 100644
index 000000000..d92e464bd
--- /dev/null
+++ b/src/FeaturesPlugin/parameterlaw_widget.xml
@@ -0,0 +1,28 @@
+<source>
+  <toolbox id="CreationMethod">
+    <box id="parameter law" title="" icon="">
+      <stringvalue id="variable" label="Name" icon=":pictures/expression.png" placeholder="Please input the parameter name">
+        <!--validator id="Parameters_VariableValidator"/-->
+      </stringvalue>
+      <shape_selector id="law_reference"
+          label="Select a reference line"
+          icon=""
+          tooltip="By convention, create a line from Left to Right"
+          shape_types="edge">
+        <validator id="GeomValidators_ShapeType" parameters="line"/>
+      </shape_selector>
+      <shape_selector id="law_definition"
+                label="Select a definition curve"
+                icon=""
+                tooltip=""
+                shape_types="edge">
+        <validator id="GeomValidators_ShapeType" parameters="edge"/>
+      </shape_selector>
+      <boolvalue id="reverse_direction"
+          label="Reverse"
+          default="false"
+          tooltip="Reverse path direction"/>
+    
+  </box>
+  </toolbox>
+</source>
\ No newline at end of file
diff --git a/src/FeaturesPlugin/pipeapprox_widget.xml b/src/FeaturesPlugin/pipeapprox_widget.xml
new file mode 100644
index 000000000..58b401fd3
--- /dev/null
+++ b/src/FeaturesPlugin/pipeapprox_widget.xml
@@ -0,0 +1,74 @@
+<!-- Copyright -->
+
+<source>
+  <toolbox id="CreationMethod">
+    <box id="simple" title="Simple pipeApprox by objects and path" icon="">
+      <multi_selector id="profile"
+                      label="Select the profile"
+                      icon=":icons/sketch.png"
+                      tooltip="Select the profile"
+                      type_choice="faces">
+        <validator id="FeaturesPlugin_ValidatorBaseForGeneration" parameters="face"/>
+      </multi_selector>
+      <shape_selector id="path_object"
+                      label="Select a path"
+                      icon=""
+                      tooltip="Select edges for a path"
+                      shape_types="edge wire">
+        <validator id="FeaturesPlugin_ValidatorPipePath"/>
+      </shape_selector>
+  </box>
+    <box id="with law" title="" icon="">
+      <shape_selector id="law_reference"
+          label="Select a reference line"
+          icon=""
+          tooltip=""
+          shape_types="edge">
+        <validator id="GeomValidators_ShapeType" parameters="line"/>
+      </shape_selector>
+      <shape_selector id="law_definition"
+                label="Select a definition curve"
+                icon=""
+                tooltip=""
+                shape_types="edge">
+        <validator id="GeomValidators_ShapeType" parameters="edge"/>
+      </shape_selector>
+      <multi_selector id="profile"
+                      label="Select the profile"
+                      icon=":icons/sketch.png"
+                      tooltip="Select the profile"
+                      type_choice="faces">
+        <validator id="FeaturesPlugin_ValidatorBaseForGeneration" parameters="face"/>
+      </multi_selector>
+      <shape_selector id="path_object"
+                label="Select a path"
+                icon=""
+                tooltip="Select edges for a path"
+                shape_types="edge">
+        <validator id="FeaturesPlugin_ValidatorPipePath"/>
+      </shape_selector>
+  </box>
+    <box id="binormal" title="Pipe by objects, path and Bi-Normal" icon="">
+      <shape_selector id="binormal"
+                      label="Bi-Normal:"
+                      tooltip="Select an edge for Bi-Normal"
+                      shape_types="edge">
+        <validator id="GeomValidators_ShapeType" parameters="line"/>
+      </shape_selector>
+      <multi_selector id="profile"
+                      label="Select the profile"
+                      icon=":icons/sketch.png"
+                      tooltip="Select the profile"
+                      type_choice="faces">
+        <validator id="FeaturesPlugin_ValidatorBaseForGeneration" parameters="face"/>
+      </multi_selector>
+      <shape_selector id="path_object"
+                      label="Select a path"
+                      icon=""
+                      tooltip="Select edges for a path"
+                      shape_types="edge wire">
+        <validator id="FeaturesPlugin_ValidatorPipePath"/>
+      </shape_selector>
+    </box>
+  </toolbox>
+</source>
diff --git a/src/FeaturesPlugin/pipeapproxlaw_widget.xml b/src/FeaturesPlugin/pipeapproxlaw_widget.xml
new file mode 100644
index 000000000..feb2bd414
--- /dev/null
+++ b/src/FeaturesPlugin/pipeapproxlaw_widget.xml
@@ -0,0 +1,90 @@
+<source>
+  <toolbox id="CreationMethod">
+    <box id="simple" title="" icon="icons/Features/pipe_locations_32x32.png">
+      <multi_selector id="profile"
+                      label="Select the profile"
+                      icon=":icons/sketch.png"
+                      tooltip="Select the profile"
+                      type_choice="faces">
+        <validator id="FeaturesPlugin_ValidatorBaseForGeneration" parameters="face"/>
+      </multi_selector>
+      <!-- shape_selector id="path_object"
+                      label="Path object:"
+                      tooltip="Select an edge or wire for path"
+                      shape_types="edge">
+        <validator id="GeomValidators_ShapeType" parameters="edge"/>
+      </shape_selector> -->
+      <shape_selector id="path_object"
+                label="Select a path"
+                icon=""
+                tooltip="Select edges for a path"
+                shape_types="edge wire">
+        <validator id="FeaturesPlugin_ValidatorPipePath"/>
+      </shape_selector>
+      <multi_selector id="Parameter_laws"
+                label="Select the laws"
+                icon=":icons/sketch.png"
+                tooltip="Select the laws"
+                type_choice="Objects">
+        <validator id="FeaturesPlugin_ValidatorParameterLaw"/>
+      </multi_selector>
+      <integervalue
+          id="nb_sect"
+          label="Number of sections for approx"
+          default="50"
+          min ="2"
+          icon=""
+          tooltip="Please input the number of sections for approx, by default 50">
+      </integervalue>
+      <boolvalue id="use_Frenet"
+          label="use frenet trihedron"
+          default="false"
+          tooltip="Use Frenet (by default try to minimize torsion)"/>
+      <boolvalue id="reverse_direction"
+                label="Reverse"
+                default="false"
+                tooltip="Reverse path direction"/>
+    </box>
+    <box id="with binormal" title="" icon="icons/Features/pipe_binormal_32x32.png">
+      <multi_selector id="profile"
+                      label="Select the profile"
+                      icon=":icons/sketch.png"
+                      tooltip="Select the profile"
+                      type_choice="faces">
+        <validator id="FeaturesPlugin_ValidatorBaseForGeneration" parameters="face"/>
+      </multi_selector>
+      <shape_selector id="path_object"
+                      label="Path object:"
+                      tooltip="Select an edge or wire for path"
+                      shape_types="edge wire">
+        <validator id="FeaturesPlugin_ValidatorPipePath"/>
+      </shape_selector>
+      <shape_selector id="binormal"
+                label="Bi-Normal:"
+                tooltip="Select an edge for Bi-Normal"
+                shape_types="edge">
+        <validator id="GeomValidators_ShapeType" parameters="line"/>
+      </shape_selector>
+      <multi_selector id="Parameter_laws"
+                label="Select the laws"
+                icon=":icons/sketch.png"
+                tooltip="Select the laws"
+                type_choice="Objects">
+        <validator id="FeaturesPlugin_ValidatorParameterLaw"/>
+      </multi_selector>
+      <integervalue
+          id="nb_sect"
+          label="Number of sections for approx"
+          default="50"
+          min ="2"
+          icon=""
+          tooltip="Please input the number of sections for approx, by default 50">
+      </integervalue>
+      <boolvalue id="reverse_direction"
+                label="Reverse"
+                default="false"
+                tooltip="Reverse path direction"/>
+    
+  </box>
+  </toolbox>
+</source>
\ No newline at end of file
diff --git a/src/FeaturesPlugin/plugin-Features.xml b/src/FeaturesPlugin/plugin-Features.xml
index 6a5cba33d..61ad6ecb0 100644
--- a/src/FeaturesPlugin/plugin-Features.xml
+++ b/src/FeaturesPlugin/plugin-Features.xml
@@ -28,6 +28,17 @@
       <feature id="Pipe" title="Pipe" tooltip="Generates extrusion along a path" icon="icons/Features/pipe.png">
         <source path="pipe_widget.xml"/>
       </feature>
+    </group>
+	<group id="Parametric Pipe">
+      <feature id="PipeApprox" title="PipeApprox" tooltip="Create a Pipe by approx" icon="icons/Features/pipe.png">
+        <source path="pipeapprox_widget.xml"/>
+      </feature>
+      <feature id="ParameterLaw" title="ParameterLaw" tooltip="Create a ParameterLaw" icon="">
+        <source path="parameterlaw_widget.xml"/>
+      </feature>
+      <feature id="PipeApproxLaw" title="PipeApproxLaw" tooltip="Create a Pipe by approx with law" icon="icons/Features/pipe_locations_32x32.png">
+        <source path="pipeapproxlaw_widget.xml"/>
+      </feature>
     </group>
     <group id="Boolean">
       <feature id="Boolean" title="Boolean" tooltip="Perform boolean operations with solids" icon="icons/Features/cut.png"
diff --git a/src/GeomAlgoAPI/CMakeLists.txt b/src/GeomAlgoAPI/CMakeLists.txt
index 7d05409ac..a64feb4f1 100644
--- a/src/GeomAlgoAPI/CMakeLists.txt
+++ b/src/GeomAlgoAPI/CMakeLists.txt
@@ -41,6 +41,8 @@ SET(PROJECT_HEADERS
     GeomAlgoAPI_ShapeBuilder.h
     GeomAlgoAPI_XAOExport.h
     GeomAlgoAPI_XAOImport.h
+    GeomAlgoAPI_PipeApprox.h
+    GeomAlgoAPI_ParameterLaw.h
 )
 
 SET(PROJECT_SOURCES
@@ -78,6 +80,8 @@ SET(PROJECT_SOURCES
     GeomAlgoAPI_ShapeBuilder.cpp
     GeomAlgoAPI_XAOExport.cpp
     GeomAlgoAPI_XAOImport.cpp
+    GeomAlgoAPI_PipeApprox.cpp
+    GeomAlgoAPI_ParameterLaw.cpp
 )
 
 SET(PROJECT_LIBRARIES
diff --git a/src/GeomAlgoAPI/GeomAlgoAPI_ParameterLaw.cpp b/src/GeomAlgoAPI/GeomAlgoAPI_ParameterLaw.cpp
new file mode 100644
index 000000000..c0c7c1424
--- /dev/null
+++ b/src/GeomAlgoAPI/GeomAlgoAPI_ParameterLaw.cpp
@@ -0,0 +1,314 @@
+// Copyright
+
+// File:        GeomAlgoAPI_ParameterLaw.cpp
+
+
+#include "GeomAlgoAPI_ParameterLaw.h"
+
+//trier les include un jour...
+//#include <GeomAPI_Face.h>
+#include <math.h>   
+#include <GeomAPI_Lin.h>
+#include <Geom_Line.hxx>
+#include <gp_Lin.hxx>
+#include <GeomAPI_ShapeExplorer.h>
+#include <GeomAlgoAPI_DFLoader.h>
+#include <GeomAlgoAPI_MakeShapeList.h>
+#include <GeomAlgoAPI_ShapeTools.h>
+
+#include <BRep_Builder.hxx>
+#include <BRep_Tool.hxx>
+#include <BRepAlgoAPI_Cut.hxx>
+#include <BRepBuilderAPI_MakeFace.hxx>
+#include <BRepBuilderAPI_Transform.hxx>
+#include <BRepBuilderAPI_MakeWire.hxx>
+#include <BRepCheck_Analyzer.hxx>
+#include <BRepOffsetAPI_MakePipe.hxx>
+#include <GeomFill_Trihedron.hxx>
+#include <BRepOffsetAPI_MakePipeShell.hxx>
+#include <BRepGProp.hxx>
+#include <Geom_Plane.hxx>
+#include <GeomLib_IsPlanarSurface.hxx>
+#include <gp_Pln.hxx>
+#include <GProp_GProps.hxx>
+#include <TopExp_Explorer.hxx>
+#include <TopoDS.hxx>
+#include <TopoDS_Wire.hxx>
+#include <TopoDS_Edge.hxx>
+#include <TopTools_ListIteratorOfListOfShape.hxx>
+#include <GProp_PGProps.hxx>
+#include <Extrema_ExtPElC.hxx>
+#include "GeomAPI.h"
+#include "GeomAPI_Edge.h"
+#include "GeomAPI_Wire.h"
+#include "GeomAPI_Pnt.h"
+#include "GeomAPI_Dir.h"
+#include "GeomAPI_Ax3.h"
+#include "GeomAPI_Curve.h"
+
+#include <GeomAPI.hxx>
+#include <Geom2d_Curve.hxx>
+#include <Geom2d_BezierCurve.hxx>
+#include <TColgp_Array1OfPnt2d.hxx>
+#include <GeomAPI_IntCS.hxx>
+#include <BRepAlgo_NormalProjection.hxx>
+#include <BRep_Tool.hxx>
+#include <Geom_Curve.hxx>
+#include <BRepAdaptor_HCompCurve.hxx>
+#include <BRepAdaptor_HCurve.hxx>
+#include <GeomAdaptor_Curve.hxx>
+#include <GCPnts_AbscissaPoint.hxx>
+#include <BRepOffsetAPI_ThruSections.hxx>
+#include "GeomAlgoAPI_Placement.h"
+#include <BRepBuilderAPI_Transform.hxx>
+#include "GeomAlgoAPI_MakeShape.h"
+
+#include <GeomAlgoAPI_CompoundBuilder.h>
+#include <GeomAPI_PlanarEdges.h>
+#include <GeomAlgoAPI_SketchBuilder.h>
+#include <BRepBuilderAPI_MakeVertex.hxx>
+#include <BRepBuilderAPI_MakeEdge.hxx>
+
+//#define NB_SECT 50
+
+/// \return solid created from face or shell.
+static TopoDS_Solid makeSolidFromShape(const TopoDS_Shape& theShape);
+
+//=================================================================================================
+GeomAlgoAPI_ParameterLaw::GeomAlgoAPI_ParameterLaw()
+{
+}
+
+//=================================================================================================
+GeomAlgoAPI_ParameterLaw::GeomAlgoAPI_ParameterLaw(std::shared_ptr<GeomAPI_Shape> theDefShape,
+	std::shared_ptr<GeomAPI_Shape>   theRefShape,
+	bool isReverse)
+{
+	build(theDefShape, theRefShape, isReverse);
+}
+
+//=================================================================================================
+void GeomAlgoAPI_ParameterLaw::build(const std::shared_ptr<GeomAPI_Shape>& theDefShape,
+	const std::shared_ptr<GeomAPI_Shape>&   theRefShape,
+	const bool isReverse)
+{
+	if(!theDefShape || !theRefShape) {
+		return;
+	}
+
+	// Getting Def
+	TopoDS_Edge aDefEdge;
+	if(theDefShape->shapeType() == GeomAPI_Shape::EDGE) {
+		aDefEdge = TopoDS::Edge(theDefShape->impl<TopoDS_Shape>());
+	}
+	// Getting Ref
+	TopoDS_Edge aRefEdge;
+	if(theRefShape->shapeType() == GeomAPI_Shape::EDGE) {
+		aRefEdge = TopoDS::Edge(theRefShape->impl<TopoDS_Shape>());
+	}
+
+
+	//COMPUTE RESULT
+	TopoDS_Shape aResult;
+
+	double defFirst, defLast, refFirst, refLast;
+	Handle(Geom_Curve) aDefCurve = BRep_Tool::Curve(aDefEdge, defFirst, defLast);
+	if(isReverse)
+	{
+		double aTemp = defFirst;
+		defFirst = defLast;
+		defLast = aTemp;
+	}
+
+	//recover Ref line
+	Handle(Geom_Curve) aRefCurve = BRep_Tool::Curve(aRefEdge, refFirst, refLast);
+	GeomAdaptor_Curve aRefAdaptorCurve = GeomAdaptor_Curve(aRefCurve);
+
+	gp_Pnt rFP, rLP;
+	gp_XYZ rF, rL;
+	aRefCurve->D0(refFirst, rFP);
+	aRefCurve->D0(refLast, rLP);
+	rF = rFP.XYZ();
+	rL = rLP.XYZ();
+	rL.Subtract(rF);
+	gp_Lin aRefLin = gp_Lin(rFP, rL);
+	refFirst = aRefAdaptorCurve.FirstParameter();
+	refLast = aRefAdaptorCurve.LastParameter();
+
+	gp_Pnt DF;
+	aDefCurve->D0(defFirst, DF);
+
+
+	//to store edges for the final result
+	BRepBuilderAPI_MakeEdge mkEdge;
+	TopTools_ListOfShape aEL;
+
+	//project First Point of the def curve on the ref line
+	// to get the translation vector
+	double Tol = 1.0e-10;
+	Extrema_ExtPElC aProjDF = Extrema_ExtPElC(DF, aRefLin, Tol, refFirst, refLast);
+	int nbDMin = aProjDF.NbExt();
+	nbDMin++;
+	int k = 1;
+	while(k < nbDMin && !aProjDF.IsMin(k))
+	{
+		k++;
+	}
+
+	Extrema_POnCurv DFPOC = aProjDF.Point(k);
+	gp_Pnt DFP = DFPOC.Value();
+
+	//get translation vector
+	// and make the translation transformation
+	// then do the transformation and recover curve.
+	gp_Vec aTransVec = rF - DFP.XYZ();
+	gp_Trsf aTrans = gp_Trsf();
+	aTrans.SetTranslation(aTransVec);
+
+	TopoDS_Edge aTransDefEdge;
+	BRepBuilderAPI_Transform* aBuilder = new BRepBuilderAPI_Transform(aDefEdge, aTrans, false);
+	if(aBuilder) {
+		if(aBuilder->IsDone()) {
+			aTransDefEdge = TopoDS::Edge(aBuilder->Shape());
+		}
+	}
+
+	aEL.Append(aTransDefEdge);
+	double tdFirst, tdLast;
+	Handle(Geom_Curve) aTransDefCurve = BRep_Tool::Curve(aTransDefEdge, tdFirst, tdLast);
+	if(isReverse)
+	{
+		double aTemp = tdFirst;
+		tdFirst = tdLast;
+		tdLast = aTemp;
+	}
+
+	//now project last point of the transDefEdge
+	// then make the needed edges for final result
+	gp_Pnt TDF, TDL;
+	aTransDefCurve->D0(tdLast, TDL);
+	aTransDefCurve->D0(tdFirst, TDF);
+	Extrema_ExtPElC aProjDL = Extrema_ExtPElC(TDL, aRefLin, Tol, refFirst, refLast);
+	nbDMin = aProjDF.NbExt();
+	nbDMin++;
+	k = 1;
+	while(k < nbDMin && !aProjDF.IsMin(k))
+	{
+		k++;
+	}
+	Extrema_POnCurv DLPOC = aProjDL.Point(k);
+	gp_Pnt DLP = DLPOC.Value();
+
+	mkEdge = BRepBuilderAPI_MakeEdge(rFP, DLP);
+	if(mkEdge.IsDone())
+		aEL.Append(mkEdge.Edge());
+	mkEdge = BRepBuilderAPI_MakeEdge(DLP, TDL);
+	if(mkEdge.IsDone())
+		aEL.Append(mkEdge.Edge());
+	mkEdge = BRepBuilderAPI_MakeEdge(TDF, rFP);
+	if(mkEdge.IsDone())
+		aEL.Append(mkEdge.Edge());
+
+	BRepBuilderAPI_MakeWire mkWire;
+	mkWire.Add(aEL);
+	BRepBuilderAPI_MakeFace mkFace;
+	if(mkWire.IsDone())
+		mkFace = BRepBuilderAPI_MakeFace(mkWire.Wire());
+	if(mkFace.IsDone())
+		aResult = mkFace.Face();
+
+	// Setting result.
+	if(aResult.IsNull()) {
+		return;
+	}
+
+
+	std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape());
+	aShape->setImpl(new TopoDS_Shape(aResult));
+	this->setShape(aShape);
+	this->setDone(true);
+}
+
+
+
+//=================================================================================================
+std::vector<double> GeomAlgoAPI_ParameterLaw::getVectorOfScalar(const std::shared_ptr<GeomAPI_Shape>&   theDef,
+	const std::shared_ptr<GeomAPI_Shape>&   theRef,
+	const bool isReverse,
+	const int nbSect)
+{
+	std::vector<double> result;
+
+	// Getting law
+	// DEF
+	TopoDS_Edge aDefEdge;
+	if(theDef->shapeType() == GeomAPI_Shape::EDGE) {
+		aDefEdge = TopoDS::Edge(theDef->impl<TopoDS_Shape>());
+	}
+	// REF
+	TopoDS_Edge aRefEdge;
+	if(theRef->shapeType() == GeomAPI_Shape::EDGE) {
+		aRefEdge = TopoDS::Edge(theRef->impl<TopoDS_Shape>());
+	}
+
+	double d, dFirst, dLast, rFirst, rLast;
+
+	//recover Def curve
+	Handle(Geom_Curve) aDefCurve = BRep_Tool::Curve(aDefEdge, dFirst, dLast);
+	if(isReverse)
+	{
+		//aPathCurve = aPathCurve->Reversed();
+		double aTemp = dFirst;
+		dFirst = dLast;
+		dLast = aTemp;
+	}
+	d = dFirst;
+	const double dStep = abs(dLast - dFirst) / (nbSect - 1);
+
+	double coeffReverse = 1.0;
+	if(isReverse)
+	{
+		coeffReverse = -1.0;
+	}
+
+	//recover Ref line
+	Handle(Geom_Curve) aRefCurve = BRep_Tool::Curve(aRefEdge, rFirst, rLast);
+	GeomAdaptor_Curve aRefAdaptorCurve = GeomAdaptor_Curve(aRefCurve);
+
+	gp_Pnt rFP, rLP;
+	gp_XYZ rF, rL;
+	aRefCurve->D0(rFirst, rFP);
+	aRefCurve->D0(rLast, rLP);
+	rF = rFP.XYZ();
+	rL = rLP.XYZ();
+	rL.Subtract(rF);
+	gp_Lin aRefLin = gp_Lin(rFP, rL);
+	rFirst = aRefAdaptorCurve.FirstParameter();
+	rLast = aRefAdaptorCurve.LastParameter();
+
+	gp_Pnt D;
+
+	for (int i = 0; i < nbSect; ++i)
+	{	
+		//get value for param
+		//will calculate from law
+
+		aDefCurve->D0(d, D);
+		double Tol = 1.0e-10;
+		Extrema_ExtPElC aCalcD = Extrema_ExtPElC(D, aRefLin, Tol, rFirst, rLast);
+		int nbDMin = aCalcD.NbExt();
+		nbDMin++;
+		int k = 1;
+		while(k < nbDMin && !aCalcD.IsMin(k))
+		{
+			k++;
+		}
+		double ii = aCalcD.SquareDistance(k);
+		ii = sqrt(ii);
+		result.push_back(ii);
+
+		d+= (coeffReverse*dStep);
+	}
+
+	return result;
+}
\ No newline at end of file
diff --git a/src/GeomAlgoAPI/GeomAlgoAPI_ParameterLaw.h b/src/GeomAlgoAPI/GeomAlgoAPI_ParameterLaw.h
new file mode 100644
index 000000000..6e9c6d2c7
--- /dev/null
+++ b/src/GeomAlgoAPI/GeomAlgoAPI_ParameterLaw.h
@@ -0,0 +1,40 @@
+// Copyright
+
+// File:        GeomAlgoAPI_ParameterLaw.h
+// Created:     
+// Author:      
+
+#ifndef GeomAlgoAPI_ParameterLaw_H_
+#define GeomAlgoAPI_ParameterLaw_H_
+
+#include <GeomAlgoAPI.h>
+#include <GeomAlgoAPI_MakeSweep.h>
+#include <ModelAPI_Feature.h>
+#include <GeomAPI_Face.h>
+#include <memory>
+#include <list>
+#include <vector>
+
+
+class GeomAlgoAPI_ParameterLaw : public GeomAlgoAPI_MakeSweep
+{
+public:
+
+  GEOMALGOAPI_EXPORT GeomAlgoAPI_ParameterLaw();
+
+  GEOMALGOAPI_EXPORT GeomAlgoAPI_ParameterLaw(std::shared_ptr<GeomAPI_Shape> theDefShape,
+                                            std::shared_ptr<GeomAPI_Shape>   theRefShape,
+											bool isReverse);
+
+  GEOMALGOAPI_EXPORT std::vector<double> getVectorOfScalar(const std::shared_ptr<GeomAPI_Shape>&   theDef,
+	const std::shared_ptr<GeomAPI_Shape>&   theRef,
+	const bool isReverse,
+	const int nbSect);
+
+private:
+  /// Builds resulting shape.
+  void build(const std::shared_ptr<GeomAPI_Shape>& theDef,
+             const std::shared_ptr<GeomAPI_Shape>&   theRef,
+			 const bool isReverse);
+};
+#endif
\ No newline at end of file
diff --git a/src/GeomAlgoAPI/GeomAlgoAPI_PipeApprox.cpp b/src/GeomAlgoAPI/GeomAlgoAPI_PipeApprox.cpp
new file mode 100644
index 000000000..05d4bcea2
--- /dev/null
+++ b/src/GeomAlgoAPI/GeomAlgoAPI_PipeApprox.cpp
@@ -0,0 +1,1107 @@
+// Copyright
+
+// File:        GeomAlgoAPI_PipeApprox.cpp
+
+
+#include "GeomAlgoAPI_PipeApprox.h"
+
+//trier les include un jour...
+//#include <GeomAPI_Face.h>
+#include <math.h>   
+#include <GeomAPI_Lin.h>
+#include <Geom_Line.hxx>
+#include <gp_Lin.hxx>
+#include <GeomAPI_ShapeExplorer.h>
+#include <GeomAlgoAPI_DFLoader.h>
+#include <GeomAlgoAPI_MakeShapeList.h>
+#include <GeomAlgoAPI_ShapeTools.h>
+
+#include "GeomConvert_ApproxCurve.hxx"
+#include "Geom_BSplineCurve.hxx"
+#include <BRep_Builder.hxx>
+#include <BRep_Tool.hxx>
+#include <BRepTools.hxx>
+#include <BRepAlgoAPI_Cut.hxx>
+#include <BRepBuilderAPI_MakeFace.hxx>
+#include <BRepBuilderAPI_Transform.hxx>
+#include <BRepBuilderAPI_MakeWire.hxx>
+#include <BRepCheck_Analyzer.hxx>
+#include <BRepOffsetAPI_MakePipe.hxx>
+#include <GeomFill_Trihedron.hxx>
+#include <BRepOffsetAPI_MakePipeShell.hxx>
+#include <BRepGProp.hxx>
+#include <Geom_Plane.hxx>
+#include <GeomLib_IsPlanarSurface.hxx>
+#include <gp_Pln.hxx>
+#include <GProp_GProps.hxx>
+#include <TopExp_Explorer.hxx>
+#include <TopoDS.hxx>
+#include <TopoDS_Wire.hxx>
+#include <TopoDS_Edge.hxx>
+#include <TopTools_ListIteratorOfListOfShape.hxx>
+#include <GProp_PGProps.hxx>
+#include <Extrema_ExtPElC.hxx>
+#include "GeomAPI.h"
+#include "GeomAPI_Edge.h"
+#include "GeomAPI_Wire.h"
+#include "GeomAPI_Pnt.h"
+#include "GeomAPI_Dir.h"
+#include "GeomAPI_Ax3.h"
+#include "GeomAPI_Curve.h"
+
+#include <GeomAPI.hxx>
+#include <Geom2d_Curve.hxx>
+#include <Geom2d_BezierCurve.hxx>
+#include <TColgp_Array1OfPnt2d.hxx>
+#include <GeomAPI_IntCS.hxx>
+#include <BRepAlgo_NormalProjection.hxx>
+#include <BRep_Tool.hxx>
+#include <Geom_Curve.hxx>
+#include <Adaptor3d_Curve.hxx>
+#include <BRepAdaptor_HCompCurve.hxx>
+#include <BRepAdaptor_HCurve.hxx>
+#include <GeomAdaptor_Curve.hxx>
+#include <GCPnts_AbscissaPoint.hxx>
+#include <BRepOffsetAPI_ThruSections.hxx>
+#include "GeomAlgoAPI_Placement.h"
+#include <BRepBuilderAPI_Transform.hxx>
+#include "GeomAlgoAPI_MakeShape.h"
+
+#include <GeomAlgoAPI_CompoundBuilder.h>
+#include <GeomAPI_PlanarEdges.h>
+#include <GeomAlgoAPI_SketchBuilder.h>
+#include <BRepBuilderAPI_MakeVertex.hxx>
+#include <BRepBuilderAPI_MakeEdge.hxx>
+
+#include <TopAbs_Orientation.hxx>
+
+//the define are only for the pipe not using ParamLaws
+#define THRUSECT
+#define NB_SECT 50
+
+//based on the GeomAlgoAPI_Revolution
+
+/// \return solid created from face or shell.
+static TopoDS_Solid makeSolidFromShape(const TopoDS_Shape& theShape);
+
+/// to make wire from a face after transformation, to use in thruSections
+static TopoDS_Wire makeWireFromTransf(const TopoDS_Shape &theSourceShape,
+	gp_Trsf  theTrsf);
+
+//=================================================================================================
+// Constructors
+//=================================================================================================
+//=================================================================================================
+GeomAlgoAPI_PipeApprox::GeomAlgoAPI_PipeApprox()
+{
+}
+
+//=================================================================================================
+GeomAlgoAPI_PipeApprox::GeomAlgoAPI_PipeApprox(std::shared_ptr<GeomAPI_Shape> theProfileShape,
+	std::shared_ptr<GeomAPI_Shape>   thePathShape)
+{
+	build(theProfileShape, thePathShape);
+}
+
+//=================================================================================================
+GeomAlgoAPI_PipeApprox::GeomAlgoAPI_PipeApprox(std::shared_ptr<GeomAPI_Shape> theProfileShape,
+	std::shared_ptr<GeomAPI_Shape>   thePathShape,
+	std::shared_ptr<GeomAPI_Shape>  theBiNormal)
+{
+	build(theProfileShape, thePathShape, theBiNormal);
+}
+
+//=================================================================================================
+GeomAlgoAPI_PipeApprox::GeomAlgoAPI_PipeApprox(std::shared_ptr<GeomAPI_Shape> theProfileShape,
+	std::shared_ptr<GeomAPI_Shape>   thePathShape,
+	std::shared_ptr<GeomAPI_Shape>   theDef,
+	std::shared_ptr<GeomAPI_Shape>   theRef)
+{
+	build(theProfileShape, thePathShape, theDef, theRef);
+}
+
+
+//=================================================================================================
+GeomAlgoAPI_PipeApprox::GeomAlgoAPI_PipeApprox(ListOfShape theProfileShapeList,
+	std::shared_ptr<GeomAPI_Shape>   thePath,
+	bool isReverse,
+	int nbSect,
+	bool withFrenet)
+{
+	build(theProfileShapeList, thePath, isReverse, nbSect, withFrenet);
+}
+
+//=================================================================================================
+GeomAlgoAPI_PipeApprox::GeomAlgoAPI_PipeApprox(ListOfShape theProfileShapeList,
+	std::shared_ptr<GeomAPI_Shape>   thePath,
+	std::shared_ptr<GeomAPI_Shape>   theBinormal,
+	bool isReverse,
+	int nbSect)
+{
+	build(theProfileShapeList, thePath, theBinormal, isReverse, nbSect);
+}
+
+
+//=================================================================================================
+// BUILD() when doing simple pipe with ThruSect
+//=================================================================================================
+
+//=================================================================================================
+void GeomAlgoAPI_PipeApprox::build(const std::shared_ptr<GeomAPI_Shape>& theProfileShape,
+	const std::shared_ptr<GeomAPI_Shape>&   thePathShape)
+{
+	if(!theProfileShape || !thePathShape) {
+		return;
+	}
+
+	// Getting profile.
+	TopoDS_Face aProfileFace = TopoDS::Face(theProfileShape->impl<TopoDS_Shape>());
+
+	// Getting path
+	const TopoDS_Shape& aPathShape = thePathShape->impl<TopoDS_Shape>();
+	TopoDS_Edge aPathEdge;
+	if(thePathShape->shapeType() == GeomAPI_Shape::EDGE) {
+		aPathEdge = TopoDS::Edge(thePathShape->impl<TopoDS_Shape>());
+	}
+
+	//COMPUTE RESULT
+	TopoDS_Shape aResult;
+	double u, aFirst, aLast;
+
+	//recover curve
+	aPathEdge.Oriented(TopAbs_FORWARD );
+	Handle(Geom_Curve) aPathCurve = BRep_Tool::Curve(aPathEdge, aFirst, aLast);
+
+	u = aFirst;
+	const double uStep = (aLast - aFirst) / (NB_SECT - 1);
+
+#ifdef THRUSECT
+	const Standard_Boolean isSolid = Standard_True;
+	const Standard_Boolean isRuled = Standard_False;
+	const Standard_Real    pres3d = 1.0e-02;
+
+	//building thrusection algo)
+	BRepOffsetAPI_ThruSections* aGenerator = new BRepOffsetAPI_ThruSections(isSolid, isRuled, pres3d);
+	if(!aGenerator) {
+		return;
+	}
+	aGenerator->SetSmoothing(Standard_True);
+	aGenerator->SetMaxDegree(5);
+	aGenerator->CheckCompatibility(Standard_False);
+#else
+	std::shared_ptr<GeomAPI_Shape> aCompoundResult;
+	std::list<std::shared_ptr<GeomAPI_Shape> > aCompoundResultList;
+#endif
+
+	//iterating on sections
+	TopoDS_Wire aWire;
+	gp_Trsf aTrsf = gp_Trsf();
+	gp_Pnt P;
+	gp_Vec T, N, Vx;
+
+	aPathCurve->D2(u, P, T, N);
+	Vx = T ^ N; //Vx should be in the plane of (P,D1,D2) so that (P,D1,Vx) is orthogonal
+	Vx = Vx ^ T;
+
+	gp_Ax3 gp_Ax3_0(P, T, Vx);
+
+	for (int i = 0; i < NB_SECT; ++i)
+	{	
+		u += uStep;
+		aPathCurve->D2(u, P, T, N);
+		Vx = T ^ N;
+		Vx = Vx ^ T;
+
+		aTrsf.SetDisplacement(gp_Ax3_0, gp_Ax3(P, T, Vx));
+
+		aWire = makeWireFromTransf(aProfileFace, aTrsf);
+
+
+		// Add section to skinner
+#ifdef THRUSECT
+		aGenerator->AddWire(aWire);
+#else
+		std::shared_ptr<GeomAPI_Shape> aForCompoundShape(new GeomAPI_Shape);
+		aForCompoundShape->setImpl(new TopoDS_Shape(aWire));
+		aCompoundResultList.push_back(aForCompoundShape);
+#endif
+	}
+#ifdef THRUSECT
+	aGenerator->Build();
+
+	if (!aGenerator->IsDone()){
+		return;
+	}
+
+	aResult = aGenerator->Shape();
+
+	// Setting naming.
+	// JE SAIS PAS
+	std::shared_ptr<GeomAPI_Shape> aFromShape(new GeomAPI_Shape), aToShape(new GeomAPI_Shape);
+	aFromShape->setImpl(new TopoDS_Shape(aGenerator->FirstShape()));
+	aToShape->setImpl(new TopoDS_Shape(aGenerator->LastShape()));
+	this->addFromShape(aFromShape);
+	this->addToShape(aToShape);
+
+	// Setting result.
+	if(aResult.IsNull()) {
+		return;
+	}
+	std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape());
+	aShape->setImpl(new TopoDS_Shape(aResult));
+	this->setShape(aShape);
+	this->setDone(true);
+#else
+	aCompoundResult = GeomAlgoAPI_CompoundBuilder::compound(aCompoundResultList);
+	this->setShape(aCompoundResult);
+	this->setDone(true);
+#endif
+}
+
+//=================================================================================================
+void GeomAlgoAPI_PipeApprox::build(const std::shared_ptr<GeomAPI_Shape>& theProfileShape,
+	const std::shared_ptr<GeomAPI_Shape>&   thePathShape,
+	const std::shared_ptr<GeomAPI_Shape>&   theBiNormal)
+{
+	if(!theProfileShape || !thePathShape || !theBiNormal) {
+		return;
+	}
+
+	// Getting profile.
+	TopoDS_Face aProfileFace = TopoDS::Face(theProfileShape->impl<TopoDS_Shape>());
+
+	// Getting path
+
+	const TopoDS_Shape& aPathShape = thePathShape->impl<TopoDS_Shape>();
+	TopoDS_Edge aPathEdge;
+	if(thePathShape->shapeType() == GeomAPI_Shape::EDGE) {
+		aPathEdge = TopoDS::Edge(thePathShape->impl<TopoDS_Shape>());
+	}
+
+	// Getting binormal
+
+	TopoDS_Shape aBiNormalShape = theBiNormal->impl<TopoDS_Shape>();
+
+	TopoDS_Edge aBiNormalEdge = TopoDS::Edge(aBiNormalShape);
+	double aFirst, aLast;
+	Handle(Geom_Curve) aBiNormalCurve = BRep_Tool::Curve(aBiNormalEdge, aFirst, aLast);
+	Handle(Geom_Line) aBiNormalLine = Handle(Geom_Line)::DownCast(aBiNormalCurve);
+
+	gp_Dir aBiNormalDir = aBiNormalLine->Lin().Direction();
+
+
+	//COMPUTE RESULT
+	TopoDS_Shape aResult;
+
+	double u;
+	//recover curve
+	aPathEdge.Oriented(TopAbs_FORWARD );
+
+	Handle(Geom_Curve) aPathCurve = BRep_Tool::Curve(aPathEdge, aFirst, aLast);
+
+	u = aFirst;
+	const double uStep = (aLast - aFirst) / (NB_SECT - 1);
+
+#ifdef THRUSECT
+	const Standard_Boolean isSolid = Standard_True;
+	const Standard_Boolean isRuled = Standard_False;
+	const Standard_Real    pres3d = 1.0e-02;
+
+	//building thrusection algo)
+	BRepOffsetAPI_ThruSections* aGenerator = new BRepOffsetAPI_ThruSections(isSolid, isRuled, pres3d);
+	if(!aGenerator) {
+		return;
+	}
+	aGenerator->SetSmoothing(Standard_True);
+	aGenerator->SetMaxDegree(5);
+	aGenerator->CheckCompatibility(Standard_False);
+#else
+	std::shared_ptr<GeomAPI_Shape> aCompoundResult;
+	std::list<std::shared_ptr<GeomAPI_Shape> > aCompoundResultList;
+#endif
+
+	//iterating on sections
+	TopoDS_Wire aWire;
+	gp_Trsf aTrsf = gp_Trsf();
+	gp_Pnt P;
+	gp_Vec T, Vx;
+
+	aPathCurve->D1(u, P, T);
+	//Vx should be in the plane of (P,D1,D2) so that (P,D1,Vx) is orthogonal
+	//if D2 undefined, replace it with "binormal"
+	Vx = T ^ aBiNormalDir;
+	Vx = Vx ^ T;
+
+	gp_Ax3 gp_Ax3_0(P, T, Vx);
+
+	for (int i = 0; i < NB_SECT; ++i)
+	{	
+		u += uStep;
+		aPathCurve->D1(u, P, T);
+		Vx = T ^ aBiNormalDir;
+		Vx = Vx ^ T;
+
+		aTrsf.SetDisplacement(gp_Ax3_0, gp_Ax3(P, T, Vx));
+
+		aWire = makeWireFromTransf(aProfileFace, aTrsf);
+
+
+		// Add section to skinner
+#ifdef THRUSECT
+		aGenerator->AddWire(aWire);
+#else
+		std::shared_ptr<GeomAPI_Shape> aForCompoundShape(new GeomAPI_Shape);
+		aForCompoundShape->setImpl(new TopoDS_Shape(aWire));
+		aCompoundResultList.push_back(aForCompoundShape);
+#endif
+	}
+#ifdef THRUSECT
+	aGenerator->Build();
+
+	if (!aGenerator->IsDone()){
+		return;
+	}
+
+	aResult = aGenerator->Shape();
+
+	// Setting naming.
+	// JE SAIS PAS
+	std::shared_ptr<GeomAPI_Shape> aFromShape(new GeomAPI_Shape), aToShape(new GeomAPI_Shape);
+	aFromShape->setImpl(new TopoDS_Shape(aGenerator->FirstShape()));
+	aToShape->setImpl(new TopoDS_Shape(aGenerator->LastShape()));
+	this->addFromShape(aFromShape);
+	this->addToShape(aToShape);
+
+	// Setting result.
+	if(aResult.IsNull()) {
+		return;
+	}
+	std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape());
+	aShape->setImpl(new TopoDS_Shape(aResult));
+	this->setShape(aShape);
+	this->setDone(true);
+#else
+	aCompoundResult = GeomAlgoAPI_CompoundBuilder::compound(aCompoundResultList);
+	this->setShape(aCompoundResult);
+	this->setDone(true);
+#endif
+}
+
+//=================================================================================================
+// BUILD() when using a law directly defined in the feature (pipeapprox)
+//=================================================================================================
+
+//=================================================================================================
+void GeomAlgoAPI_PipeApprox::build(const std::shared_ptr<GeomAPI_Shape>& theProfileShape,
+	const std::shared_ptr<GeomAPI_Shape>&   thePathShape,
+	const std::shared_ptr<GeomAPI_Shape>&   theDef,
+	const std::shared_ptr<GeomAPI_Shape>&   theRef)
+{
+	if(!theProfileShape || !thePathShape || !theDef || !theRef) {
+		return;
+	}
+
+	// Getting profile.
+	TopoDS_Face aProfileFace = TopoDS::Face(theProfileShape->impl<TopoDS_Shape>());
+
+	// Getting path
+	//const TopoDS_Shape& aPathShape = thePathShape->impl<TopoDS_Shape>();
+	TopoDS_Edge aPathEdge;
+	if(thePathShape->shapeType() == GeomAPI_Shape::EDGE) {
+		aPathEdge = TopoDS::Edge(thePathShape->impl<TopoDS_Shape>());
+	}
+
+	// Getting law
+	// DEF
+	TopoDS_Edge aDefEdge;
+	if(theDef->shapeType() == GeomAPI_Shape::EDGE) {
+		aDefEdge = TopoDS::Edge(theDef->impl<TopoDS_Shape>());
+	}
+	// REF
+	TopoDS_Edge aRefEdge;
+	if(theRef->shapeType() == GeomAPI_Shape::EDGE) {
+		aRefEdge = TopoDS::Edge(theRef->impl<TopoDS_Shape>());
+	}
+
+	//COMPUTE RESULT
+	TopoDS_Shape aResult;
+
+	double u, aFirst, aLast;
+	double d, dFirst, dLast, rFirst, rLast;
+	//recover curve
+	aPathEdge.Oriented(TopAbs_FORWARD );
+	Handle(Geom_Curve) aPathCurve = BRep_Tool::Curve(aPathEdge, aFirst, aLast);
+
+	u = aFirst;
+	const double uStep = (aLast - aFirst) / (NB_SECT - 1);
+
+	//recover Def curve
+	Handle(Geom_Curve) aDefCurve = BRep_Tool::Curve(aDefEdge, dFirst, dLast);
+	d = dFirst;
+	const double dStep = (dLast - dFirst) / (NB_SECT - 1);
+
+	//recover Ref line
+	Handle(Geom_Curve) aRefCurve = BRep_Tool::Curve(aRefEdge, rFirst, rLast);
+	GeomAdaptor_Curve aRefAdaptorCurve = GeomAdaptor_Curve(aRefCurve);
+	gp_Pnt rFP, rLP;
+	gp_XYZ rF, rL;
+	aRefCurve->D0(rFirst, rFP);
+	aRefCurve->D0(rLast, rLP);
+	rF = rFP.XYZ();
+	rL = rLP.XYZ();
+	rL.Subtract(rF);
+	gp_Lin aRefLin = gp_Lin(rFP, rL);
+	rFirst = aRefAdaptorCurve.FirstParameter();
+	rLast = aRefAdaptorCurve.LastParameter();
+
+#ifdef THRUSECT
+	const Standard_Boolean isSolid = Standard_True;
+	const Standard_Boolean isRuled = Standard_False;
+	const Standard_Real    pres3d = 1.0e-02;
+
+	//building thrusection algo)
+	BRepOffsetAPI_ThruSections* aGenerator = new BRepOffsetAPI_ThruSections(isSolid, isRuled, pres3d);
+	if(!aGenerator) {
+		return;
+	}
+	aGenerator->SetSmoothing(Standard_True);
+	aGenerator->SetMaxDegree(5);
+	aGenerator->CheckCompatibility(Standard_False);
+#else
+	std::shared_ptr<GeomAPI_Shape> aCompoundResult;
+	std::list<std::shared_ptr<GeomAPI_Shape> > aCompoundResultList;
+#endif
+
+	//iterating on sections
+	TopoDS_Wire aWire;
+	gp_Trsf aTrsf = gp_Trsf();
+	gp_Trsf bTrsf = gp_Trsf();
+	gp_Pnt P, D, C;
+	gp_Vec T, N, Vx;
+
+	aPathCurve->D2(u, P, T, N);
+	//Vx should be in the plane of (P,D1,D2) so that (P,D1,Vx) is orthogonal
+	Vx = T ^ N;
+	Vx = Vx ^ T;
+
+	gp_Ax3 gp_Ax3_0(P, T, Vx);
+
+	//get center for scaling
+	GProp_PGProps aCConstr = GProp_PGProps();
+	TopExp_Explorer aVertexExp(aProfileFace, TopAbs_VERTEX);
+	for (; aVertexExp.More(); aVertexExp.Next()) {
+		TopoDS_Vertex aVS = TopoDS::Vertex(aVertexExp.Current());
+		gp_Pnt aP = BRep_Tool::Pnt(aVS);
+		aCConstr.AddPoint(aP);
+	}
+	C = aCConstr.CentreOfMass();
+
+	for (int i = 0; i < NB_SECT; ++i)
+	{	
+		u += uStep;
+		aPathCurve->D2(u, P, T, N);
+		Vx = T ^ N;
+		Vx = Vx ^ T;
+
+		//set scale
+		//will calculate from law
+		d+= dStep;
+		aDefCurve->D0(d, D);
+		double Tol = 1.0e-10;
+		Extrema_ExtPElC aCalcD = Extrema_ExtPElC(D, aRefLin, Tol, rFirst, rLast);
+		int nbDMin = aCalcD.NbExt();
+		nbDMin++;
+		int k = 1;
+		while(k < nbDMin && !aCalcD.IsMin(k))
+		{
+			k++;
+		}
+		double ii = aCalcD.SquareDistance(k);
+		ii = sqrt(ii);
+		//for the scale maybe get init "length" to divide ii by it?
+
+		bTrsf.SetScale(C, ii);
+		BRepBuilderAPI_Transform* aBuilder = new BRepBuilderAPI_Transform(aProfileFace, bTrsf, true);
+
+		TopoDS_Shape aScaledPorfileFace = aBuilder->Shape();
+
+		aTrsf.SetDisplacement(gp_Ax3_0, gp_Ax3(P, T, Vx));
+		aWire = makeWireFromTransf(aScaledPorfileFace, aTrsf);
+
+
+		// Add section to skinner
+#ifdef THRUSECT
+		aGenerator->AddWire(aWire);
+#else
+		std::shared_ptr<GeomAPI_Shape> aForCompoundShape(new GeomAPI_Shape);
+		aForCompoundShape->setImpl(new TopoDS_Shape(aWire));
+		aCompoundResultList.push_back(aForCompoundShape);
+#endif
+	}
+#ifdef THRUSECT
+	aGenerator->Build();
+
+	if (!aGenerator->IsDone()){
+		return;
+	}
+
+	aResult = aGenerator->Shape();
+
+	// Setting naming.
+	// JE SAIS PAS
+	std::shared_ptr<GeomAPI_Shape> aFromShape(new GeomAPI_Shape), aToShape(new GeomAPI_Shape);
+	aFromShape->setImpl(new TopoDS_Shape(aGenerator->FirstShape()));
+	aToShape->setImpl(new TopoDS_Shape(aGenerator->LastShape()));
+	this->addFromShape(aFromShape);
+	this->addToShape(aToShape);
+
+	// Setting result.
+	if(aResult.IsNull()) {
+		return;
+	}
+	std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape());
+	aShape->setImpl(new TopoDS_Shape(aResult));
+	this->setShape(aShape);
+	this->setDone(true);
+#else
+	aCompoundResult = GeomAlgoAPI_CompoundBuilder::compound(aCompoundResultList);
+	this->setShape(aCompoundResult);
+	this->setDone(true);
+#endif
+}
+
+//=================================================================================================
+// BUILD() when using paramLaws
+//=================================================================================================
+
+//=================================================================================================
+
+void GeomAlgoAPI_PipeApprox::build(const ListOfShape& theProfileShapeList,
+	const std::shared_ptr<GeomAPI_Shape>&   thePathShape,
+	const bool isReverse,
+	const int nbSect,
+	const bool withFrenet)
+{
+	if(!theProfileShapeList.size() || !thePathShape) {
+		return;
+	}
+
+	double coeffReverse = 1.0;
+	if(isReverse)
+	{
+		coeffReverse = -1.0;
+	}
+
+	//To COMPUTE the RESULT
+	TopoDS_Shape aResult;
+
+	BRepOffsetAPI_ThruSections* aGenerator;
+
+	const Standard_Boolean isSolid = Standard_True;
+	const Standard_Boolean isRuled = Standard_False;
+	const Standard_Real    pres3d = 1.0e-02;
+
+	aGenerator = new BRepOffsetAPI_ThruSections(isSolid, isRuled, pres3d);
+	if(!aGenerator) {
+		return;
+	}
+	aGenerator->SetSmoothing(Standard_True);
+	aGenerator->SetMaxDegree(5);
+	aGenerator->CheckCompatibility(Standard_False);
+
+	//used for dump
+	std::shared_ptr<GeomAPI_Shape> aCompoundResult;
+	std::shared_ptr<GeomAPI_Shape> aCompoundPointResult;
+	std::list<std::shared_ptr<GeomAPI_Shape> > aCompoundResultList;
+	std::list<std::shared_ptr<GeomAPI_Shape> > aCompoundPointList;
+
+	// Getting path
+	double u, aFirst, aLast, uStep;
+	TopoDS_Edge aPathEdge;
+	TopoDS_Wire aPathWire;
+	Handle(Geom_Curve) aPathCurve;
+
+	if(thePathShape->shapeType() == GeomAPI_Shape::EDGE) {
+		aPathEdge = TopoDS::Edge(thePathShape->impl<TopoDS_Shape>());
+		//recover curve
+
+		aPathCurve = BRep_Tool::Curve(aPathEdge, aFirst, aLast);
+		if(isReverse)
+		{
+			double aTemp = aFirst;
+			aFirst = aLast;
+			aLast = aTemp;
+		}
+
+		u = aFirst;
+		uStep = abs(aLast - aFirst) / (nbSect - 1);
+
+		//iterating on sections
+		TopoDS_Wire aWire;
+		gp_Trsf aTrsf = gp_Trsf();
+		gp_Pnt P;
+		gp_Vec T, N, Vx;
+		double Tol = 1.0e-10;
+
+		//Vx should be in the plane of (P,D1,D2) so that (P,D1,Vx) is orthogonal
+		aPathCurve->D2(u, P, T, N);
+		if(!withFrenet && (N.X() == 0) && (N.Y() == 0) && (N.Z() == 0))
+		{
+			//no 2nd derivative to help find a normal oriented towards the curvature
+			//use random orthogonal vecotr to T
+			N.SetX(-T.Y());
+			N.SetY(T.X());
+			N.SetZ(0.0);
+
+			Vx = N ^ T;
+			Vx = T ^ Vx;
+
+		}
+		else
+		{
+			//use standard Frenet
+
+			//need to add error management...
+			Vx = N ^ T;
+			Vx = T ^ Vx;
+			//currently force "crash", which means need for binormal, 
+		}	
+
+		gp_Ax3 gp_Ax3_0(P, T, Vx);
+
+
+		for(ListOfShape::const_reverse_iterator anIter = theProfileShapeList.crbegin(); anIter != theProfileShapeList.crend(); anIter++) {
+			const TopoDS_Face aProfile = TopoDS::Face((*anIter)->impl<TopoDS_Shape>());
+			if(withFrenet)
+			{
+				//normal frenet frame
+				aPathCurve->D2(u, P, T, N);
+				Vx = N ^ T;
+				Vx = T ^ Vx;
+			}
+			else
+			{
+				//iterative placement of the frames
+				//based on  http://webhome.cs.uvic.ca/~blob/courses/305/notes/pdf/ref-frames.pdf
+				//might need to be checked
+				//process from lines 816-837 is valid (tested and debugged) 
+				//and work based on global transformation from start to actual and not iterative
+				gp_Vec aux;
+				aPathCurve->D1(u, P, aux);
+				if (T.IsParallel(aux, Tol))
+				{
+					if(T.IsOpposite(aux, Tol))
+					{
+						Vx.Reverse();
+					}
+				}
+				else
+				{
+					gp_Vec cross(T);
+					cross.Cross(aux);
+					double alpha = T.AngleWithRef(aux, cross);
+					gp_Ax1 axe(gp::Origin(), cross.XYZ());
+
+					//have T and Vx for the new frame
+					Vx.Rotate(axe, alpha);
+				}
+				T = aux;
+			}
+
+			aTrsf.SetDisplacement(gp_Ax3_0, gp_Ax3(P, T, Vx));
+			aWire = makeWireFromTransf(aProfile, aTrsf);
+
+
+			aGenerator->AddWire(aWire);
+
+			//for dump
+			std::shared_ptr<GeomAPI_Shape> aForCompoundShape(new GeomAPI_Shape);
+			aForCompoundShape->setImpl(new TopoDS_Shape(aWire));
+			aCompoundResultList.push_back(aForCompoundShape);
+			//
+
+			u += (coeffReverse*uStep);
+		}
+	}else if(thePathShape->shapeType() == GeomAPI_Shape::WIRE){
+		aPathWire = TopoDS::Wire(thePathShape->impl<TopoDS_Shape>());
+		BRepTools::Write(aPathWire, "C:/Users/occ/Desktop/pathDump.brep");
+
+		Handle(BRepAdaptor_HCompCurve) aPathCompCurve = new (BRepAdaptor_HCompCurve) (aPathWire);
+
+		Standard_Real aTol = Precision::Confusion();
+		GeomAbs_Shape aContinuity = GeomAbs_C2 /*highest supported continuity*/;
+		Standard_Integer aMaxSeg = 10000, /*max number of spans*/
+			aMaxDeg = 9; /*max degree, consistent with settings in Algo*/
+		GeomConvert_ApproxCurve anApproxPath (aPathCompCurve, aTol, aContinuity, aMaxSeg, aMaxDeg);
+		Handle(Geom_BSplineCurve) aBSplinePath = anApproxPath.Curve();
+		BRepBuilderAPI_MakeEdge * aBE = new BRepBuilderAPI_MakeEdge(aBSplinePath);
+		TopoDS_Edge aBSE = aBE->Edge();
+		BRepTools::Write(aBSE, "C:/Users/occ/Desktop/pathBspline.brep");
+		aFirst = aBSplinePath->FirstParameter();
+		aLast = aBSplinePath->LastParameter();
+
+		if(isReverse)
+		{
+			double aTemp = aFirst;
+			aFirst = aLast;
+			aLast = aTemp;
+		}
+
+		u = aFirst;
+		uStep = abs(aLast - aFirst) / (nbSect - 1);
+
+		//iterating on sections
+		TopoDS_Wire aWire;
+		gp_Trsf aTrsf = gp_Trsf();
+		gp_Trsf bTrsf = gp_Trsf();
+		gp_Pnt P;
+		gp_Vec T, N, Vx;
+		gp_Ax1 axe0;
+		double Tol = 1.0e-10;
+
+		//Vx should be in the plane of (P,D1,D2) so that (P,D1,Vx) is orthogonal
+		aBSplinePath->D2(u, P, T, N);
+
+		if(!withFrenet && (N.X() == 0) && (N.Y() == 0) && (N.Z() == 0))
+		{
+			//no 2nd derivative to help find a normal oriented towards the curvature
+			//use random orthogonal vecotr to T
+			if(T.X() == 0)
+			{
+				N.SetX(0.0);
+				N.SetY(-T.Z());
+				N.SetZ(T.Y());
+			}else if (T.Y() == 0)
+			{
+				N.SetX(-T.Z());
+				N.SetY(0.0);
+				N.SetZ(T.X());
+			}
+			else
+			{
+				N.SetX(-T.Y());
+				N.SetY(T.X());
+				N.SetZ(0.0);
+			}
+			//can first derivative be null ? assume not
+			Vx = N ^ T;
+			axe0 = gp_Ax1(gp::Origin(), Vx.XYZ());
+			Vx = T ^ Vx;
+		}
+		else
+		{
+			//use standard Frenet
+			//no checks to force "crash" if withFrenet, which means need for binormal, to add error
+			Vx = N ^ T;
+			axe0 = gp_Ax1(gp::Origin(), Vx.XYZ());
+			Vx = T ^ Vx;
+		}	
+		const gp_Ax3 gp_Ax3_0(P, T, Vx);
+		const gp_Pnt P0(P);
+		const gp_Vec T0(T);
+		double alpha = 0.0;
+
+		for(ListOfShape::const_reverse_iterator anIter = theProfileShapeList.crbegin(); anIter != theProfileShapeList.crend(); anIter++) {
+			const TopoDS_Face aProfile = TopoDS::Face((*anIter)->impl<TopoDS_Shape>());
+			if(withFrenet)
+			{
+				//normal frenet frame
+				aBSplinePath->D2(u, P, T, N);
+				Vx = N ^ T;
+				Vx = T ^ Vx;
+
+				aTrsf.SetDisplacement(gp_Ax3_0, gp_Ax3(P, T, Vx));
+				aWire = makeWireFromTransf(aProfile, aTrsf);
+			}
+			else
+			{//this works better, not iterative anymore but global from initial place to actual
+				gp_Pnt Paux;
+				gp_Vec Taux;
+				aBSplinePath->D1(u, Paux, Taux);
+
+				bTrsf = gp_Trsf();
+				if (T0.IsParallel(Taux, Tol))
+				{
+					if(T0.IsOpposite(Taux, Tol))
+					{
+						bTrsf.SetMirror(axe0);
+					}
+				}
+				else
+				{
+					gp_Vec cross(Taux);
+					cross.Cross(T);
+					double angle = T0.AngleWithRef(Taux, cross);
+					bTrsf.SetRotation(axe0, angle);
+				}
+
+				gp_Vec VT(Paux.XYZ() - P0.XYZ());
+				bTrsf.SetTranslationPart(VT);
+
+				aWire = makeWireFromTransf(aProfile, bTrsf);
+			}
+
+			aGenerator->AddWire(aWire);
+
+			//for dump
+			std::shared_ptr<GeomAPI_Shape> aForCompoundShape(new GeomAPI_Shape);
+			aForCompoundShape->setImpl(new TopoDS_Shape(aWire));
+			aCompoundResultList.push_back(aForCompoundShape);
+
+			//ForDump
+			BRepBuilderAPI_MakeVertex coucou(P);
+			std::shared_ptr<GeomAPI_Shape> aForCompoundPoint(new GeomAPI_Shape);
+			aForCompoundPoint->setImpl(new TopoDS_Shape(coucou.Vertex()));
+			aCompoundPointList.push_back(aForCompoundPoint);
+			//
+
+			u += (coeffReverse*uStep);
+		}
+	}
+
+	aGenerator->Build();
+
+
+
+	aResult = aGenerator->Shape();
+
+	// Setting naming.
+	// JE SAIS PAS
+
+	std::shared_ptr<GeomAPI_Shape> aFromShape(new GeomAPI_Shape), aToShape(new GeomAPI_Shape);
+	aFromShape->setImpl(new TopoDS_Shape(aGenerator->LastShape()));
+	aToShape->setImpl(new TopoDS_Shape(aGenerator->FirstShape()));
+	this->addFromShape(aFromShape);
+	this->addToShape(aToShape);
+
+	// Setting result.
+	if(aResult.IsNull()) {
+		return;
+	}
+	std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape());
+	aShape->setImpl(new TopoDS_Shape(aResult));
+	this->setShape(aShape);
+	this->setDone(true);
+
+	//dump
+	aCompoundResult = GeomAlgoAPI_CompoundBuilder::compound(aCompoundResultList);
+	TopoDS_Compound aComp = TopoDS::Compound(aCompoundResult->impl<TopoDS_Shape>());
+	BRepTools::Write(aComp, "C:/Users/occ/Desktop/forDump.brep");
+
+	aCompoundPointResult = GeomAlgoAPI_CompoundBuilder::compound(aCompoundPointList);
+	TopoDS_Compound aComp2 = TopoDS::Compound(aCompoundResult->impl<TopoDS_Shape>());
+	BRepTools::Write(aComp2, "C:/Users/occ/Desktop/forDumpPoint.brep");
+}
+
+
+//=================================================================================================
+void GeomAlgoAPI_PipeApprox::build(const ListOfShape& theProfileShapeList,
+	const std::shared_ptr<GeomAPI_Shape>&   thePathShape,
+	const std::shared_ptr<GeomAPI_Shape>&   theBinormal,
+	const bool isReverse,
+	const int nbSect)
+{
+	//METHOD MIGHT NEED TO BE DEBUGGED/MODIFIED BASED ON BUILD WITHOUT BINORMAL
+	if(!theProfileShapeList.size() || !thePathShape || !theBinormal) {
+		return;
+	}
+
+	double coeffReverse = 1.0;
+	if(isReverse)
+	{
+		coeffReverse = -1.0;
+	}
+
+	//COMPUTE RESULT
+	TopoDS_Shape aResult;
+
+	BRepOffsetAPI_ThruSections* aGenerator; 
+
+	const Standard_Boolean isSolid = Standard_True;
+	const Standard_Boolean isRuled = Standard_False;
+	const Standard_Real    pres3d = 1.0e-02;
+
+	aGenerator = new BRepOffsetAPI_ThruSections(isSolid, isRuled, pres3d);
+	if(!aGenerator) {
+		return;
+	}
+	aGenerator->SetSmoothing(Standard_True);
+	aGenerator->SetMaxDegree(5);
+	aGenerator->CheckCompatibility(Standard_False);
+
+
+	// Getting binormal
+	TopoDS_Shape aBiNormalShape = theBinormal->impl<TopoDS_Shape>();
+	TopoDS_Edge aBiNormalEdge = TopoDS::Edge(aBiNormalShape);
+	double aFirst, aLast;
+
+	Handle(Geom_Curve) aBiNormalCurve = BRep_Tool::Curve(aBiNormalEdge, aFirst, aLast);
+	Handle(Geom_Line) aBiNormalLine = Handle(Geom_Line)::DownCast(aBiNormalCurve);
+
+	gp_Dir aBiNormalDir = aBiNormalLine->Lin().Direction();
+
+	// Getting path
+	double u, uStep;
+	TopoDS_Edge aPathEdge;
+	TopoDS_Wire aPathWire;
+	Handle(Geom_Curve) aPathCurve;
+
+	if(thePathShape->shapeType() == GeomAPI_Shape::EDGE) {
+		aPathEdge = TopoDS::Edge(thePathShape->impl<TopoDS_Shape>());
+
+
+		//recover curve
+
+		aPathCurve = BRep_Tool::Curve(aPathEdge, aFirst, aLast);
+
+		if(isReverse)
+		{
+			double aTemp = aFirst;
+			aFirst = aLast;
+			aLast = aTemp;
+		}
+
+		u = aFirst;
+		const double uStep = abs(aLast - aFirst) / (nbSect - 1);
+
+		//iterating on sections
+		TopoDS_Wire aWire;
+		gp_Trsf aTrsf = gp_Trsf();
+		gp_Pnt P;
+		gp_Vec T, Vx;
+
+		aPathCurve->D1(u, P, T);
+		//Vx should be in the plane of (P,D1,D2) so that (P,D1,Vx) is orthogonal
+		//if D2 undefined, replace it with "binormal"
+		Vx = T ^ aBiNormalDir;
+		Vx = Vx ^ T;
+
+		gp_Ax3 gp_Ax3_0(P, T, Vx);
+
+		int cpt = nbSect - 1;
+		for(ListOfShape::const_reverse_iterator anIter = theProfileShapeList.crbegin(); anIter != theProfileShapeList.crend(); anIter++) {
+			const TopoDS_Face aProfile = TopoDS::Face((*anIter)->impl<TopoDS_Shape>());
+
+			aPathCurve->D1(u, P, T);
+			Vx = T ^ aBiNormalDir;
+			Vx = Vx ^ T;
+			aTrsf.SetDisplacement(gp_Ax3_0, gp_Ax3(P, T, Vx));
+
+			aWire = makeWireFromTransf(aProfile, aTrsf);
+
+
+			aGenerator->AddWire(aWire);
+
+			u += (coeffReverse*uStep);
+			cpt--;
+		}
+	}else if(thePathShape->shapeType() == GeomAPI_Shape::WIRE)
+	{
+		aPathWire = TopoDS::Wire(thePathShape->impl<TopoDS_Shape>());
+		Handle(BRepAdaptor_HCompCurve) aPathCompCurve = new (BRepAdaptor_HCompCurve) (aPathWire);
+
+		Standard_Real aTol = Precision::Confusion();
+		GeomAbs_Shape aContinuity = GeomAbs_C2 /*highest supported continuity*/;
+		Standard_Integer aMaxSeg = 10000, /*max number of spans*/
+			aMaxDeg = 9; /*max degree, consistent with settings in Algo*/
+		GeomConvert_ApproxCurve anApproxPath (aPathCompCurve, aTol, aContinuity, aMaxSeg, aMaxDeg);
+		Handle(Geom_BSplineCurve) aBSplinePath = anApproxPath.Curve();
+
+		aFirst = aBSplinePath->FirstParameter();
+		aLast = aBSplinePath->LastParameter();
+
+
+		gp_Ax3 gp_Ax3_0;
+
+
+		if(isReverse)
+		{
+			double aTemp = aFirst;
+			aFirst = aLast;
+			aLast = aTemp;
+		}
+
+		u = aFirst;
+		uStep = abs(aLast-aFirst) / (nbSect - 1);
+		TopoDS_Wire aWire;
+		gp_Trsf aTrsf = gp_Trsf();
+		gp_Pnt P;
+		gp_Vec T,Vx;
+
+		aPathCurve->D1(u, P, T);
+		Vx = T ^ aBiNormalDir;
+		Vx = Vx ^ T;
+
+		gp_Ax3_0 = gp_Ax3(P, T, Vx);
+		for(ListOfShape::const_reverse_iterator anIter = theProfileShapeList.crbegin(); anIter != theProfileShapeList.crend(); anIter++) {
+			const TopoDS_Face aProfile = TopoDS::Face((*anIter)->impl<TopoDS_Shape>());
+
+			aPathCurve->D1(u, P, T);
+			Vx = T ^ aBiNormalDir;
+			Vx = Vx ^ T;
+			aTrsf.SetDisplacement(gp_Ax3_0, gp_Ax3(P, T, Vx));
+			aWire = makeWireFromTransf(aProfile, aTrsf);
+
+
+			aGenerator->AddWire(aWire);
+
+
+			u += (coeffReverse*uStep);
+		}
+
+	}
+	aGenerator->Build();
+
+	if (!aGenerator->IsDone()){
+		return;
+	}
+
+	aResult = aGenerator->Shape();
+
+	// Setting naming.
+	// JE SAIS PAS
+	std::shared_ptr<GeomAPI_Shape> aFromShape(new GeomAPI_Shape), aToShape(new GeomAPI_Shape);
+	aFromShape->setImpl(new TopoDS_Shape(aGenerator->LastShape()));
+	aToShape->setImpl(new TopoDS_Shape(aGenerator->FirstShape()));
+	this->addFromShape(aFromShape);
+	this->addToShape(aToShape);
+
+	// Setting result.
+	if(aResult.IsNull()) {
+		return;
+	}
+	std::shared_ptr<GeomAPI_Shape> aShape(new GeomAPI_Shape());
+	aShape->setImpl(new TopoDS_Shape(aResult));
+	this->setShape(aShape);
+	this->setDone(true);
+}
+
+//=================================================================================================
+TopoDS_Wire makeWireFromTransf(const TopoDS_Shape &theSourceShape,
+	gp_Trsf  theTrsf)
+{
+	TopoDS_Wire aResult;
+	if(theSourceShape.IsNull()) {
+		return aResult;
+	}
+
+	BRepBuilderAPI_Transform* aBuilder = new BRepBuilderAPI_Transform(theSourceShape, theTrsf, true);
+	if(!aBuilder) {
+		return aResult;
+	}
+
+	if(aBuilder->IsDone() != Standard_True) {
+		return aResult;
+	}
+
+	BRepBuilderAPI_MakeWire mkWire;
+
+	TopExp_Explorer aEdgeExp(aBuilder->Shape(), TopAbs_EDGE);
+	for (; aEdgeExp.More(); aEdgeExp.Next()) {
+		TopoDS_Edge aES = TopoDS::Edge(aEdgeExp.Current());
+		mkWire.Add(aES);
+	}
+	aResult = mkWire.Wire();
+
+	return aResult;
+}
\ No newline at end of file
diff --git a/src/GeomAlgoAPI/GeomAlgoAPI_PipeApprox.h b/src/GeomAlgoAPI/GeomAlgoAPI_PipeApprox.h
new file mode 100644
index 000000000..8b11c06b3
--- /dev/null
+++ b/src/GeomAlgoAPI/GeomAlgoAPI_PipeApprox.h
@@ -0,0 +1,85 @@
+// Copyright
+
+// File:        GeomAlgoAPI_PipeApprox.h
+// Created:     
+// Author:      
+
+#ifndef GeomAlgoAPI_PipeApprox_H_
+#define GeomAlgoAPI_PipeApprox_H_
+
+#include <GeomAlgoAPI.h>
+#include <GeomAlgoAPI_MakeSweep.h>
+#include <ModelAPI_Feature.h>
+#include <GeomAPI_Face.h>
+#include <memory>
+#include <list>
+#include <vector>
+/// \class GeomAlgoAPI_PipeApprox
+/// \ingroup DataAlgo
+/// \brief Allows to create the Pipe based on a given face and path.
+
+class GeomAlgoAPI_PipeApprox : public GeomAlgoAPI_MakeSweep
+{
+public:
+  /// \brief Creates Pipe for the given shape.
+  /// \param[in] theBaseShape face for Pipe.
+  /// \param[in] thePath path for Pipe.
+  GEOMALGOAPI_EXPORT GeomAlgoAPI_PipeApprox();
+
+  //basic pipe with thrusection algo
+  GEOMALGOAPI_EXPORT GeomAlgoAPI_PipeApprox(std::shared_ptr<GeomAPI_Shape> theProfileShape,
+                                            std::shared_ptr<GeomAPI_Shape>   thePathShape);
+
+  GEOMALGOAPI_EXPORT GeomAlgoAPI_PipeApprox(std::shared_ptr<GeomAPI_Shape> theProfileShape,
+                                            std::shared_ptr<GeomAPI_Shape>   thePathShape,
+											std::shared_ptr<GeomAPI_Shape>   theBiNormal);
+
+  //single law, does a "scaling"
+  GEOMALGOAPI_EXPORT GeomAlgoAPI_PipeApprox(std::shared_ptr<GeomAPI_Shape> theProfileShape,
+                                            std::shared_ptr<GeomAPI_Shape>   thePathShape,
+											std::shared_ptr<GeomAPI_Shape>   theDef,
+											std::shared_ptr<GeomAPI_Shape>   theRef);
+
+
+
+  //WHEN USING LAWS
+  GEOMALGOAPI_EXPORT GeomAlgoAPI_PipeApprox(ListOfShape theProfileShapeList,
+			std::shared_ptr<GeomAPI_Shape>   thePath,
+			bool isReverse,
+			int nbSect,
+			bool withFrenet);
+
+  GEOMALGOAPI_EXPORT GeomAlgoAPI_PipeApprox(ListOfShape theProfileShapeList,
+			std::shared_ptr<GeomAPI_Shape>   thePath,
+			std::shared_ptr<GeomAPI_Shape>   theBinormal,
+			bool isReverse,
+			int nbSect);
+
+private:
+  /// Builds resulting shape.
+  void build(const std::shared_ptr<GeomAPI_Shape>& theProfileShape,
+             const std::shared_ptr<GeomAPI_Shape>&   thePathShape);
+
+  void build(const std::shared_ptr<GeomAPI_Shape>& theProfileShape,
+									const std::shared_ptr<GeomAPI_Shape>&   thePathShape,
+									const std::shared_ptr<GeomAPI_Shape>&   theBiNormal);
+  //
+  void build(const std::shared_ptr<GeomAPI_Shape>& theProfileShape,
+									const std::shared_ptr<GeomAPI_Shape>&   thePathShape,
+									const std::shared_ptr<GeomAPI_Shape>&   theDef,
+									const std::shared_ptr<GeomAPI_Shape>&   theRef);
+
+  //
+  void build(const ListOfShape& theProfileShapeList,
+			const std::shared_ptr<GeomAPI_Shape>&   thePath,
+			const bool isReverse,
+			const int nbSect,
+			const bool withFrenet);
+
+  void build(const ListOfShape& theProfileShapeList,
+			const std::shared_ptr<GeomAPI_Shape>&   thePath,
+			const std::shared_ptr<GeomAPI_Shape>&   theBinormal,
+			const bool isReverse,
+			const int nbSect);
+};
+#endif
\ No newline at end of file
diff --git a/src/Model/Model_Update.cpp b/src/Model/Model_Update.cpp
index 1f6c8319f..8de329477 100755
--- a/src/Model/Model_Update.cpp
+++ b/src/Model/Model_Update.cpp
@@ -400,7 +400,20 @@ bool Model_Update::processFeature(FeaturePtr theFeature)
         "Feature '%1' is updated in infinitive loop").arg(theFeature->data()->name()).send();
       return false;
     }
-    myProcessed[theFeature] = aCount + 1;
+	//TEST FOR SWEEP (EdMei)
+	if(theFeature->getKind() == "PipeApproxLaw" || theFeature->getKind() == "PipeApprox")
+	{
+		std::map<std::shared_ptr<ModelAPI_Feature>, int >::iterator it;
+		for(it = myProcessed.begin(); it != myProcessed.end(); it++)
+		{
+			it->second = 0;
+		}
+	}
+	else
+	{
+		myProcessed[theFeature] = aCount + 1;
+	}
+	//END TEST FOR SWEEP (EdMei)
   }
 
   // check this feature is not yet checked or processed