class SMESH_EXPORT SMESH_MesherHelper
{
-public:
+ public:
// ---------- PUBLIC UTILITIES ----------
/*!
return 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
+ *
+ * Order of those UV in the FACE is as follows.
+ * a4 p3 a3
+ * o---x-----o
+ * | : |
+ * | :UV |
+ * p4 x...O.....x p2
+ * | : |
+ * o---x-----o
+ * a1 p1 a2
+ */
+ 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
/*!
* \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 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
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,
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 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)
+ {
+ TIDSortedNodeSet s;
+ s.insert(n1);
+ s.insert(n2);
+ s.insert(n3);
+ 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, 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
