fix TopoShape::getFacesFromSubelement
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wmayer
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5fb7faeeef
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461c0b1f7b
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@ -257,123 +257,6 @@ Data::Segment* TopoShape::getSubElement(const char* Type, unsigned long n) const
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return new ShapeSegment(getSubShape(temp.c_str()));
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}
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void TopoShape::getLinesFromSubelement(const Data::Segment* element,
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std::vector<Base::Vector3d> &Points,
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std::vector<Line> &lines) const
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{
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}
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void TopoShape::getFacesFromSubelement(const Data::Segment* element,
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std::vector<Base::Vector3d> &Points,
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std::vector<Base::Vector3d> &PointNormals,
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std::vector<Facet> &faces) const
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{
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if (element->getTypeId() == ShapeSegment::getClassTypeId()) {
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const TopoDS_Shape& shape = static_cast<const ShapeSegment*>(element)->Shape;
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if (shape.IsNull() || shape.ShapeType() != TopAbs_FACE)
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return;
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TopLoc_Location aLoc;
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// doing the meshing and checking the result
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Handle(Poly_Triangulation) aPoly = BRep_Tool::Triangulation(TopoDS::Face(shape),aLoc);
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if (aPoly.IsNull())
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return;
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// geting the transformation of the shape/face
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gp_Trsf myTransf;
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Standard_Boolean identity = true;
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if (!aLoc.IsIdentity()) {
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identity = false;
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myTransf = aLoc.Transformation();
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}
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Standard_Integer i;
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// geting size and create the array
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int nbNodesInFace = aPoly->NbNodes();
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int nbTriInFace = aPoly->NbTriangles();
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Points.resize(nbNodesInFace);
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PointNormals.resize(nbNodesInFace); // fills up already the array
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faces.resize(nbTriInFace);
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// check orientation
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TopAbs_Orientation orient = shape.Orientation();
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// cycling through the poly mesh
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const Poly_Array1OfTriangle& Triangles = aPoly->Triangles();
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const TColgp_Array1OfPnt& Nodes = aPoly->Nodes();
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for (i=1; i<=nbTriInFace; i++) {
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// Get the triangle
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Standard_Integer N1,N2,N3;
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Triangles(i).Get(N1,N2,N3);
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// change orientation of the triangles
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if (orient != TopAbs_FORWARD) {
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Standard_Integer tmp = N1;
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N1 = N2;
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N2 = tmp;
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}
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gp_Pnt V1 = Nodes(N1);
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gp_Pnt V2 = Nodes(N2);
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gp_Pnt V3 = Nodes(N3);
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// transform the vertices to the place of the face
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if (!identity) {
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V1.Transform(myTransf);
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V2.Transform(myTransf);
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V3.Transform(myTransf);
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}
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// Calculate triangle normal
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gp_Vec v1(V1.X(),V1.Y(),V1.Z()),v2(V2.X(),V2.Y(),V2.Z()),v3(V3.X(),V3.Y(),V3.Z());
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gp_Vec Normal = (v2-v1)^(v3-v1);
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//Standard_Real Area = 0.5 * Normal.Magnitude();
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// add the triangle normal to the vertex normal for all points of this triangle
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PointNormals[N1-1] += Base::Vector3d(Normal.X(),Normal.Y(),Normal.Z());
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PointNormals[N2-1] += Base::Vector3d(Normal.X(),Normal.Y(),Normal.Z());
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PointNormals[N3-1] += Base::Vector3d(Normal.X(),Normal.Y(),Normal.Z());
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Points[N1-1].Set(V1.X(),V1.Y(),V1.Z());
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Points[N2-1].Set(V2.X(),V2.Y(),V2.Z());
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Points[N3-1].Set(V3.X(),V3.Y(),V3.Z());
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int j = i - 1;
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N1--;
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N2--;
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N3--;
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faces[j].I1 = N1;
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faces[j].I2 = N2;
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faces[j].I3 = N3;
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}
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// normalize all vertex normals
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for (i=0; i < nbNodesInFace; i++) {
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gp_Dir clNormal;
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try {
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Handle_Geom_Surface Surface = BRep_Tool::Surface(TopoDS::Face(shape));
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gp_Pnt vertex(Base::convertTo<gp_Pnt>(Points[i]));
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GeomAPI_ProjectPointOnSurf ProPntSrf(vertex, Surface);
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Standard_Real fU, fV;
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ProPntSrf.Parameters(1, fU, fV);
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GeomLProp_SLProps clPropOfFace(Surface, fU, fV, 2, gp::Resolution());
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clNormal = clPropOfFace.Normal();
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Base::Vector3d temp = Base::convertTo<Base::Vector3d>(clNormal);
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if (temp * Points[i] < 0)
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temp = -temp;
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Points[i] = temp;
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}
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catch (...) {
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}
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Points[i].Normalize();
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}
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}
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}
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TopoDS_Shape TopoShape::getSubShape(const char* Type) const
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{
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if (!Type)
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@ -2706,3 +2589,91 @@ void TopoShape::getPoints(std::vector<Base::Vector3d> &Points,
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if (!hasFaces)
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Normals.clear();
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}
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void TopoShape::getLinesFromSubelement(const Data::Segment* element,
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std::vector<Base::Vector3d> &Points,
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std::vector<Line> &lines) const
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{
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}
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void TopoShape::getFacesFromSubelement(const Data::Segment* element,
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std::vector<Base::Vector3d> &Points,
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std::vector<Base::Vector3d> &PointNormals,
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std::vector<Facet> &faces) const
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{
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if (element->getTypeId() == ShapeSegment::getClassTypeId()) {
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const TopoDS_Shape& shape = static_cast<const ShapeSegment*>(element)->Shape;
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if (shape.IsNull() || shape.ShapeType() != TopAbs_FACE)
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return;
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std::set<MeshVertex> vertices;
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Standard_Real x1, y1, z1;
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Standard_Real x2, y2, z2;
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Standard_Real x3, y3, z3;
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Handle_StlMesh_Mesh aMesh = new StlMesh_Mesh();
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#if OCC_VERSION_HEX >= 0x060801
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StlTransfer::RetrieveMesh(shape, aMesh);
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#else
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throw Base::AttributeError("getFacesFromSubelement is available only in OCC 6.8.1 and up.");
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#endif
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StlMesh_MeshExplorer xp(aMesh);
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for (Standard_Integer nbd=1;nbd<=aMesh->NbDomains();nbd++) {
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for (xp.InitTriangle (nbd); xp.MoreTriangle (); xp.NextTriangle ()) {
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xp.TriangleVertices (x1,y1,z1,x2,y2,z2,x3,y3,z3);
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Data::ComplexGeoData::Facet face;
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std::set<MeshVertex>::iterator it;
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// 1st vertex
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MeshVertex v1(x1,y1,z1);
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it = vertices.find(v1);
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if (it == vertices.end()) {
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v1.i = vertices.size();
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face.I1 = v1.i;
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vertices.insert(v1);
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}
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else {
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face.I1 = it->i;
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}
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// 2nd vertex
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MeshVertex v2(x2,y2,z2);
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it = vertices.find(v2);
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if (it == vertices.end()) {
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v2.i = vertices.size();
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face.I2 = v2.i;
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vertices.insert(v2);
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}
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else {
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face.I2 = it->i;
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}
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// 3rd vertex
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MeshVertex v3(x3,y3,z3);
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it = vertices.find(v3);
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if (it == vertices.end()) {
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v3.i = vertices.size();
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face.I3 = v3.i;
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vertices.insert(v3);
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}
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else {
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face.I3 = it->i;
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}
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// make sure that we don't insert invalid facets
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if (face.I1 != face.I2 &&
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face.I2 != face.I3 &&
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face.I3 != face.I1)
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faces.push_back(face);
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}
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}
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(void)PointNormals; // leave this empty
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std::vector<gp_Pnt> points;
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points.resize(vertices.size());
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for (std::set<MeshVertex>::iterator it = vertices.begin(); it != vertices.end(); ++it)
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points[it->i] = it->toPoint();
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for (std::vector<gp_Pnt>::iterator it = points.begin(); it != points.end(); ++it)
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Points.push_back(Base::Vector3d(it->X(),it->Y(),it->Z()));
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}
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}
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