+++ /dev/null
-// Copyright (C) 2014-2021 CEA/DEN, EDF R&D
-//
-// This library is free software; you can redistribute it and/or
-// modify it under the terms of the GNU Lesser General Public
-// License as published by the Free Software Foundation; either
-// version 2.1 of the License, or (at your option) any later version.
-//
-// This library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-// Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public
-// License along with this library; if not, write to the Free Software
-// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-//
-// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
-//
-
-#include "GeomAlgoAPI_NormalToFace.h"
-
-#include <TopoDS_Shape.hxx>
-#include <TopoDS_Face.hxx>
-#include <TopoDS.hxx>
-#include <BRep_Tool.hxx>
-#include <gp_Ax3.hxx>
-#include <Geom_Plane.hxx>
-#include <gp_Pln.hxx>
-#include <TopoDS_Iterator.hxx>
-#include <GProp_GProps.hxx>
-#include <BRepGProp.hxx>
-#include <ShapeAnalysis.hxx>
-#include <ShapeAnalysis_Surface.hxx>
-#include <BRepAdaptor_Surface.hxx>
-#include <BRepBndLib.hxx>
-#include <GeomLProp_SLProps.hxx>
-#include <BRepBuilderAPI_MakeEdge.hxx>
-#include <GeomAPI_Edge.h>
-
- /*!
- * \brief Return type of shape for explode. In case of compound it will be a type of its first sub shape.
- * \param theShape The shape to get type of.
- * \retval TopAbs_ShapeEnum Return type of shape for explode.
- */
-TopAbs_ShapeEnum GetTypeOfSimplePart(const TopoDS_Shape& theShape)
-{
- TopAbs_ShapeEnum aType = theShape.ShapeType();
- if (aType == TopAbs_VERTEX) return TopAbs_VERTEX;
- else if (aType == TopAbs_EDGE || aType == TopAbs_WIRE) return TopAbs_EDGE;
- else if (aType == TopAbs_FACE || aType == TopAbs_SHELL) return TopAbs_FACE;
- else if (aType == TopAbs_SOLID || aType == TopAbs_COMPSOLID) return TopAbs_SOLID;
- else if (aType == TopAbs_COMPOUND) {
- // Only the iType of the first shape in the compound is taken into account
- TopoDS_Iterator It (theShape, Standard_False, Standard_False);
- if (It.More()) {
- return GetTypeOfSimplePart(It.Value());
- }
- }
- return TopAbs_SHAPE;
-}
-
- /*!
- * \brief Get Local Coordinate System, corresponding to the given shape.
- * \param theShape The shape to get type of.
- * \retval gp_Ax3 Return axis.
- *
- * Origin of the LCS is situated at the shape's center of mass.
- * Axes of the LCS are obtained from shape's location or,
- * if the shape is a planar face, from position of its plane.
- */
-gp_Ax3 GetPosition(const TopoDS_Shape& theShape)
-{
- gp_Ax3 aResult;
-
- if (theShape.IsNull())
- return aResult;
-
- // Axes
- aResult.Transform(theShape.Location().Transformation());
- if (theShape.ShapeType() == TopAbs_FACE) {
- Handle(Geom_Surface) aGS = BRep_Tool::Surface(TopoDS::Face(theShape));
- if (!aGS.IsNull() && aGS->IsKind(STANDARD_TYPE(Geom_Plane))) {
- Handle(Geom_Plane) aGPlane = Handle(Geom_Plane)::DownCast(aGS);
- gp_Pln aPln = aGPlane->Pln();
- aResult = aPln.Position();
- // In case of reverse orinetation of the face invert the plane normal
- // (the face's normal does not mathc the plane's normal in this case)
- if (theShape.Orientation() == TopAbs_REVERSED) {
- gp_Dir Vx = aResult.XDirection();
- gp_Dir N = aResult.Direction().Mirrored(Vx);
- gp_Pnt P = aResult.Location();
- aResult = gp_Ax3(P, N, Vx);
- }
- }
- }
-
- // Origin
- gp_Pnt aPnt;
-
- TopAbs_ShapeEnum aShType = theShape.ShapeType();
-
- if (aShType == TopAbs_VERTEX) {
- aPnt = BRep_Tool::Pnt(TopoDS::Vertex(theShape));
- } else {
- if (aShType == TopAbs_COMPOUND) {
- aShType = GetTypeOfSimplePart(theShape);
- }
-
- GProp_GProps aSystem;
- if (aShType == TopAbs_EDGE || aShType == TopAbs_WIRE)
- BRepGProp::LinearProperties(theShape, aSystem);
- else if (aShType == TopAbs_FACE || aShType == TopAbs_SHELL)
- BRepGProp::SurfaceProperties(theShape, aSystem);
- else
- BRepGProp::VolumeProperties(theShape, aSystem);
-
- aPnt = aSystem.CentreOfMass();
- }
-
- aResult.SetLocation(aPnt);
-
- return aResult;
-}
-
-//=================================================================================================
-bool GeomAlgoAPI_NormalToFace::normal(GeomShapePtr theFace,
- GeomShapePtr thePoint,
- GeomEdgePtr theNormal,
- std::string& theError)
-{
- #ifdef _DEBUG
- std::cout << "GeomAlgoAPI_NormalToFace::normal" << std::endl;
- #endif
-
- if (!theFace.get()) {
- theError = "Face for normale calculation is null";
- return false;
- }
-
- TopoDS_Shape aShape = theFace->impl<TopoDS_Shape>();
-
- if (aShape.ShapeType() != TopAbs_FACE) {
- theError = "Shape for normale calculation is not a face";
- return false;
- }
-
- TopoDS_Face aFace = TopoDS::Face(aShape);
-
- // Point
- gp_Pnt p1 (0,0,0);
- // Point parameters on surface
- double u1, u2, v1, v2;
- Handle(Geom_Surface) aSurf = BRep_Tool::Surface(aFace);
- Handle(ShapeAnalysis_Surface) aSurfAna = new ShapeAnalysis_Surface (aSurf);
- gp_Ax3 aPos = GetPosition(aFace);
- p1 = aPos.Location();
- // Set default starting point using UV bounds
- ShapeAnalysis::GetFaceUVBounds(aFace, u1, u2, v1, v2);
- gp_Pnt2d pUV ((u2 + u1) * 0.5, (v2 + v1) * 0.5);
-
- // Change to Vertex coord if selected
- if (thePoint.get()) {
- TopoDS_Shape anOptPnt = thePoint->impl<TopoDS_Shape>();
- if (anOptPnt.IsNull()) {
- theError = "Invalid shape given for point argument";
- return false;
- }
- p1 = BRep_Tool::Pnt(TopoDS::Vertex(anOptPnt));
- pUV = aSurfAna->ValueOfUV(p1, Precision::Confusion());
- }
-
- // Normal direction
- gp_Vec Vec1,Vec2;
- BRepAdaptor_Surface SF (aFace);
- SF.D1(pUV.X(), pUV.Y(), p1, Vec1, Vec2);
- if (Vec1.Magnitude() < Precision::Confusion()) {
- gp_Vec tmpV;
- gp_Pnt tmpP;
- SF.D1(pUV.X(), pUV.Y()-0.1, tmpP, Vec1, tmpV);
- }
- else if (Vec2.Magnitude() < Precision::Confusion()) {
- gp_Vec tmpV;
- gp_Pnt tmpP;
- SF.D1(pUV.X()-0.1, pUV.Y(), tmpP, tmpV, Vec2);
- }
-
- gp_Vec V = Vec1.Crossed(Vec2);
- Standard_Real mod = V.Magnitude();
- if (mod < Precision::Confusion())
- Standard_NullObject::Raise("Normal vector of a face has null magnitude");
-
- // Set length of normal vector to average radius of curvature
- Standard_Real radius = 0.0;
- GeomLProp_SLProps aProperties (aSurf, pUV.X(), pUV.Y(), 2, Precision::Confusion());
- if (aProperties.IsCurvatureDefined()) {
- Standard_Real radius1 = Abs(aProperties.MinCurvature());
- Standard_Real radius2 = Abs(aProperties.MaxCurvature());
- if (Abs(radius1) > Precision::Confusion()) {
- radius = 1.0 / radius1;
- if (Abs(radius2) > Precision::Confusion()) {
- radius = (radius + 1.0 / radius2) / 2.0;
- }
- } else {
- if (Abs(radius2) > Precision::Confusion()) {
- radius = 1.0 / radius2;
- }
- }
- }
-
- // Set length of normal vector to average dimension of the face
- // (only if average radius of curvature is not appropriate)
- if (radius < Precision::Confusion()) {
- Bnd_Box B;
- Standard_Real Xmin, Xmax, Ymin, Ymax, Zmin, Zmax;
- BRepBndLib::Add(aFace, B);
- B.Get(Xmin, Ymin, Zmin, Xmax, Ymax, Zmax);
- radius = ((Xmax - Xmin) + (Ymax - Ymin) + (Zmax - Zmin)) / 3.0;
- }
-
- if (radius < Precision::Confusion())
- radius = 1.0;
-
- V *= radius / mod;
-
- // consider the face orientation
- if (aFace.Orientation() == TopAbs_REVERSED ||
- aFace.Orientation() == TopAbs_INTERNAL) {
- V = - V;
- }
-
- // Edge
- gp_Pnt p2 = p1.Translated(V);
- BRepBuilderAPI_MakeEdge aBuilder (p1, p2);
- if (!aBuilder.IsDone())
- Standard_NullObject::Raise("Vector construction failed");
- aShape = aBuilder.Shape();
-
- theNormal->setImpl(new TopoDS_Shape(aShape));
-
- return true;
-}
-
