-// Copyright (C) 2007-2012 CEA/DEN, EDF R&D, OPEN CASCADE
+// Copyright (C) 2007-2014 CEA/DEN, EDF R&D, OPEN CASCADE
//
// Copyright (C) 2003-2007 OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
// CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS
// 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.
+// 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
//=======================================================================
/*!
- * \brief It helps meshers to add elements
+ * \brief It helps meshers to add elements and provides other utilities
*
- * It allow meshers not to care about creation of medium nodes
+ * - It allows meshers not to care about creation of medium nodes
* when filling a quadratic mesh. Helper does it itself.
- * It defines degree of elements to create when IsQuadraticSubMesh()
+ * It defines order of elements to create when IsQuadraticSubMesh()
* is called.
+ * - It provides information on a shape it is initialized with:
+ * periodicity, presence of singularities etc.
+ * - ...
*/
//=======================================================================
class SMESH_EXPORT SMESH_MesherHelper
{
-public:
+ public:
// ---------- PUBLIC UTILITIES ----------
/*!
- * \brief Returns true if given node is medium
- * \param n - node to check
- * \param typeToCheck - type of elements containing the node to ask about node status
+ * \brief Returns true if all elements of a sub-mesh are of same shape
+ * \param smDS - sub-mesh to check elements of
+ * \param shape - expected shape of elements
+ * \param nullSubMeshRes - result value for the case of smDS == NULL
* \retval bool - check result
*/
- static bool IsMedium(const SMDS_MeshNode* node,
- const SMDSAbs_ElementType typeToCheck = SMDSAbs_All);
+ static bool IsSameElemGeometry(const SMESHDS_SubMesh* smDS,
+ SMDSAbs_GeometryType shape,
+ const bool nullSubMeshRes = true);
/*!
* \brief Load nodes bound to face into a map of node columns
* The key of the map is a normalized parameter of each
* base node on theBaseSide. Edges in theBaseSide must be sequenced.
* This method works in supposition that nodes on the face
- * forms a rectangular grid and elements can be quardrangles or triangles
+ * forms a structured grid and elements can be quardrangles or triangles
*/
static bool LoadNodeColumns(TParam2ColumnMap & theParam2ColumnMap,
const TopoDS_Face& theFace,
const TopoDS_Edge& theBaseEdge,
SMESHDS_Mesh* theMesh,
SMESH_ProxyMesh* theProxyMesh=0);
+ /*!
+ * \brief Return true if 2D mesh on FACE is structured
+ */
+ static bool IsStructured( SMESH_subMesh* faceSM );
+
+ /*!
+ * \brief Returns true if given node is medium
+ * \param n - node to check
+ * \param typeToCheck - type of elements containing the node to ask about node status
+ * \retval bool - check result
+ */
+ static bool IsMedium(const SMDS_MeshNode* node,
+ const SMDSAbs_ElementType typeToCheck = SMDSAbs_All);
/*!
* \brief Return support shape of a node
* \param node - the node
* \param nbNodes - total nb of nodes
* \retval int - valid node index
*/
- static int WrapIndex(const int ind, const int nbNodes) {
- if ( ind < 0 ) return nbNodes + ind % nbNodes;
- if ( ind >= nbNodes ) return ind % nbNodes;
- return ind;
+ static inline int WrapIndex(int ind, const int nbNodes) {
+ return (( ind %= nbNodes ) < 0 ) ? ind + nbNodes : ind;
}
+ /*!
+ * \brief Return UV of a point inside a quadrilateral FACE by it's
+ * normalized parameters within a unit quadrangle and the
+ * corresponding projections on sub-shapes of the real-world FACE.
+ * The used calculation method is called Trans-Finite Interpolation (TFI).
+ * \param x,y - normalized parameters that should be in range [0,1]
+ * \param a0,a1,a2,a3 - UV of VERTEXes of the FACE == projections on VERTEXes
+ * \param p0,p1,p2,p3 - UV of the point projections on EDGEs of the FACE
+ * \return gp_XY - UV of the point on the FACE
+ *
+ * Y ^ Order of those UV in the FACE is as follows.
+ * |
+ * a3 p2 a2
+ * o---x-----o
+ * | : |
+ * | :UV |
+ * p3 x...O.....x p1
+ * | : |
+ * o---x-----o ----> X
+ * a0 p0 a1
+ */
+ inline static gp_XY calcTFI(double x, double y,
+ const gp_XY a0,const gp_XY a1,const gp_XY a2,const gp_XY a3,
+ const gp_XY p0,const gp_XY p1,const gp_XY p2,const gp_XY p3);
+
+ /*!
+ * \brief Same as "gp_XY calcTFI(...)" but in 3D
+ */
+ inline static gp_XYZ calcTFI(double x, double y,
+ const gp_XYZ a0,const gp_XYZ a1,const gp_XYZ a2,const gp_XYZ a3,
+ const gp_XYZ p0,const gp_XYZ p1,const gp_XYZ p2,const gp_XYZ p3);
+ /*!
+ * \brief Count nb of sub-shapes
+ * \param shape - the shape
+ * \param type - the type of sub-shapes to count
+ * \param ignoreSame - if true, use map not to count same shapes, esle use explorer
+ * \retval int - the calculated number
+ */
+ static int Count(const TopoDS_Shape& shape,
+ const TopAbs_ShapeEnum type,
+ const bool ignoreSame);
+
/*!
* \brief Return number of unique ancestors of the shape
*/
const SMESH_Mesh& mesh,
TopAbs_ShapeEnum ancestorType);
/*!
- * \brief Find a common ancestors of two shapes of the given type
+ * \brief Find a common ancestor, of the given type, of two shapes
*/
static TopoDS_Shape GetCommonAncestor(const TopoDS_Shape& shape1,
const TopoDS_Shape& shape2,
const SMESH_Mesh& mesh,
TopAbs_ShapeEnum ancestorType);
-
/*!
* \brief Return orientation of sub-shape in the main shape
*/
static double MaxTolerance( const TopoDS_Shape& shape );
+ static double GetAngle( const TopoDS_Edge & E1, const TopoDS_Edge & E2,
+ const TopoDS_Face & F, const TopoDS_Vertex & V,
+ gp_Vec* faceNormal=0);
+
static bool IsClosedEdge( const TopoDS_Edge& anEdge );
static TopoDS_Vertex IthVertex( const bool is2nd, TopoDS_Edge anEdge, const bool CumOri=true );
/*!
* \brief Set order of elements to create without calling IsQuadraticSubMesh()
*/
+
+ /*!
+ * \brief Set myCreateQuadratic flag
+ */
void SetIsQuadratic(const bool theBuildQuadratic)
{ myCreateQuadratic = theBuildQuadratic; }
+
+ /*!
+ * \brief Set myCreateBiQuadratic flag
+ */
+ void SetIsBiQuadratic(const bool theBuildBiQuadratic)
+ { myCreateBiQuadratic = theBuildBiQuadratic; }
+
/*!
* \brief Return myCreateQuadratic flag
*/
bool GetIsQuadratic() const { return myCreateQuadratic; }
+ /*
+ * \brief Find out elements orientation on a geometrical face
+ */
+ bool IsReversedSubMesh (const TopoDS_Face& theFace);
+
+ /*!
+ * \brief Return myCreateBiQuadratic flag
+ */
+ bool GetIsBiQuadratic() const { return myCreateBiQuadratic; }
+
/*!
* \brief Move medium nodes of faces and volumes to fix distorted elements
* \param error - container of fixed distorted elements
* or the next methods. By defaul elements are set on the shape if
* a mesh has no shape to be meshed
*/
- void SetElementsOnShape(bool toSet) { mySetElemOnShape = toSet; }
+ bool SetElementsOnShape(bool toSet)
+ { bool res = mySetElemOnShape; mySetElemOnShape = toSet; return res; }
/*!
* \brief Set shape to make elements on without calling IsQuadraticSubMesh()
const TopoDS_Shape& GetSubShape() const { return myShape; }
/*!
- * Creates a node
+ * Creates a node (!Note ID before u=0.,v0.)
*/
SMDS_MeshNode* AddNode(double x, double y, double z, int ID = 0, double u=0., double v=0.);
/*!
const int id=0,
const bool force3d = false);
/*!
- * Creates quadratic or linear quadrangle
+ * Creates bi-quadratic, quadratic or linear quadrangle
*/
SMDS_MeshFace* AddFace(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const SMDS_MeshNode* n4,
const int id = 0,
const bool force3d = false);
-
/*!
* Creates polygon, with additional nodes in quadratic mesh
*/
const int id = 0,
const bool force3d = true);
/*!
- * Creates quadratic or linear hexahedron
+ * Creates bi-quadratic, quadratic or linear hexahedron
*/
SMDS_MeshVolume* AddVolume(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
double GetNodeU(const TopoDS_Edge& theEdge,
const SMDS_MeshNode* theNode,
const SMDS_MeshNode* inEdgeNode=0,
- bool* check=0);
+ bool* check=0) const;
/*!
* \brief Return node UV on face
* \param inFaceNode - a node of element being created located inside a face
+ * \param check - if provided, returns result of UV check that it enforces
*/
gp_XY GetNodeUV(const TopoDS_Face& F,
const SMDS_MeshNode* n,
static gp_XY GetMiddleUV(const Handle(Geom_Surface)& surface,
const gp_XY& uv1,
const gp_XY& uv2);
+ /*!
+ * \brief Return UV for the central node of a biquadratic triangle
+ */
+ static gp_XY GetCenterUV(const gp_XY& uv1,
+ const gp_XY& uv2,
+ const gp_XY& uv3,
+ const gp_XY& uv12,
+ const gp_XY& uv23,
+ const gp_XY& uv31,
+ bool * isBadTria=0);
/*!
* \brief Define a pointer to wrapper over a function of gp_XY class,
* suitable to pass as xyFunPtr to applyIn2D().
{ return IsRealSeam( GetMeshDS()->ShapeToIndex( subShape)); }
/*!
* \brief Check if the shape set through IsQuadraticSubMesh() or SetSubShape()
- * has a seam edge
- * \retval bool - true if it has
+ * has a seam edge, i.e. an edge that has two parametric representations
+ * on a surface
+ * \retval bool - true if it has
*/
bool HasSeam() const { return !mySeamShapeIds.empty(); }
+ /*!
+ * \brief Check if the shape set through IsQuadraticSubMesh() or SetSubShape()
+ * has a seam edge that encounters twice in a wire
+ * \retval bool - true if it has
+ */
+ bool HasRealSeam() const { return HasSeam() && ( *mySeamShapeIds.begin() < 0 ); }
/*!
* \brief Return index of periodic parametric direction of a closed face
- * \retval int - 1 for U, 2 for V direction
+ * \retval int - 1 for U, 2 for V direction
*/
int GetPeriodicIndex() const { return myParIndex; }
/*!
const SMDS_MeshNode* GetMediumNode(const SMDS_MeshNode* n1,
const SMDS_MeshNode* n2,
const bool force3d);
+ /*!
+ * \brief Return existing or create a new central node for a quardilateral
+ * quadratic face given its 8 nodes.
+ * \param force3d - true means node creation in between the given nodes,
+ * else node position is found on a geometrical face if any.
+ */
+ const SMDS_MeshNode* GetCentralNode(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n4,
+ const SMDS_MeshNode* n12,
+ const SMDS_MeshNode* n23,
+ const SMDS_MeshNode* n34,
+ const SMDS_MeshNode* n41,
+ bool force3d);
+ /*!
+ * \brief Return existing or create a new central node for a
+ * quadratic triangle given its 6 nodes.
+ * \param force3d - true means node creation in between the given nodes,
+ * else node position is found on a geometrical face if any.
+ */
+ const SMDS_MeshNode* GetCentralNode(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n12,
+ const SMDS_MeshNode* n23,
+ const SMDS_MeshNode* n31,
+ bool force3d);
/*!
* \brief Return index and type of the shape (EDGE or FACE only) to set a medium node on
*/
std::pair<int, TopAbs_ShapeEnum> GetMediumPos(const SMDS_MeshNode* n1,
- const SMDS_MeshNode* n2);
+ const SMDS_MeshNode* n2,
+ const bool useCurSubShape=false);
/*!
* \brief Add a link in my data structure
*/
virtual ~SMESH_MesherHelper();
-protected:
+ protected:
/*!
* \brief Select UV on either of 2 pcurves of a seam edge, closest to the given UV
- * \param uv1 - UV on the seam
- * \param uv2 - UV within a face
- * \retval gp_Pnt2d - selected UV
+ * \param uv1 - UV on the seam
+ * \param uv2 - UV within a face
+ * \retval gp_Pnt2d - selected UV
*/
gp_Pnt2d GetUVOnSeam( const gp_Pnt2d& uv1, const gp_Pnt2d& uv2 ) const;
private:
// Forbiden copy constructor
- SMESH_MesherHelper (const SMESH_MesherHelper& theOther) {};
-
- // special map for using during creation of quadratic elements
- TLinkNodeMap myTLinkNodeMap;
+ SMESH_MesherHelper (const SMESH_MesherHelper& theOther);
+
+ // key of a map of bi-quadratic face to it's central node
+ struct TBiQuad: public std::pair<int, std::pair<int, int> >
+ {
+ TBiQuad(const SMDS_MeshNode* n1,
+ const SMDS_MeshNode* n2,
+ const SMDS_MeshNode* n3,
+ const SMDS_MeshNode* n4=0)
+ {
+ TIDSortedNodeSet s;
+ s.insert(n1);
+ s.insert(n2);
+ s.insert(n3);
+ if ( n4 ) s.insert(n4);
+ TIDSortedNodeSet::iterator n = s.begin();
+ first = (*n++)->GetID();
+ second.first = (*n++)->GetID();
+ second.second = (*n++)->GetID();
+ }
+ };
+
+ // maps used during creation of quadratic elements
+ TLinkNodeMap myTLinkNodeMap; // medium nodes on links
+ std::map< TBiQuad, const SMDS_MeshNode* > myMapWithCentralNode; // central nodes of faces
std::set< int > myDegenShapeIds;
std::set< int > mySeamShapeIds;
int myShapeID;
bool myCreateQuadratic;
+ bool myCreateBiQuadratic;
bool mySetElemOnShape;
bool myFixNodeParameters;
std::map< int,bool > myNodePosShapesValidity;
bool toCheckPosOnShape(int shapeID ) const;
void setPosOnShapeValidity(int shapeID, bool ok ) const;
-
};
+//=======================================================================
+inline gp_XY
+SMESH_MesherHelper::calcTFI(double x, double y,
+ const gp_XY a0,const gp_XY a1,const gp_XY a2,const gp_XY a3,
+ const gp_XY p0,const gp_XY p1,const gp_XY p2,const gp_XY p3)
+{
+ return
+ ((1 - y) * p0 + x * p1 + y * p2 + (1 - x) * p3 ) -
+ ((1 - x) * (1 - y) * a0 + x * (1 - y) * a1 + x * y * a2 + (1 - x) * y * a3);
+}
+//=======================================================================
+inline gp_XYZ
+SMESH_MesherHelper::calcTFI(double x, double y,
+ const gp_XYZ a0,const gp_XYZ a1,const gp_XYZ a2,const gp_XYZ a3,
+ const gp_XYZ p0,const gp_XYZ p1,const gp_XYZ p2,const gp_XYZ p3)
+{
+ return
+ ((1 - y) * p0 + x * p1 + y * p2 + (1 - x) * p3 ) -
+ ((1 - x) * (1 - y) * a0 + x * (1 - y) * a1 + x * y * a2 + (1 - x) * y * a3);
+}
+//=======================================================================
#endif
