return 0;
}
+//=======================================================================
+//function : tessellate
+//purpose :
+//=======================================================================
+static Standard_Integer tessellate (Draw_Interpretor& /*di*/, Standard_Integer nbarg, const char** argv)
+{
+ if (nbarg != 5)
+ {
+ std::cerr << "Builds regular triangulation with specified number of triangles\n"
+ " Usage: tessellate result {surface|face} nbu nbv\n"
+ " Triangulation is put into the face with natural bounds (result);\n"
+ " it will have 2*nbu*nbv triangles and (nbu+1)*(nbv+1) nodes";
+ return 1;
+ }
+
+ const char *aResName = argv[1];
+ const char *aSrcName = argv[2];
+ int aNbU = Draw::Atoi (argv[3]);
+ int aNbV = Draw::Atoi (argv[4]);
+
+ if (aNbU <= 0 || aNbV <= 0)
+ {
+ std::cerr << "Error: Arguments nbu and nbv must be both greater than 0\n";
+ return 1;
+ }
+
+ Handle(Geom_Surface) aSurf = DrawTrSurf::GetSurface(aSrcName);
+ double aUMin, aUMax, aVMin, aVMax;
+ if (! aSurf.IsNull())
+ {
+ aSurf->Bounds (aUMin, aUMax, aVMin, aVMax);
+ }
+ else
+ {
+ TopoDS_Shape aShape = DBRep::Get(aSrcName);
+ if (aShape.IsNull() || aShape.ShapeType() != TopAbs_FACE)
+ {
+ std::cerr << "Error: " << aSrcName << " is not a face\n";
+ return 1;
+ }
+ TopoDS_Face aFace = TopoDS::Face (aShape);
+ aSurf = BRep_Tool::Surface (aFace);
+ if (aSurf.IsNull())
+ {
+ std::cerr << "Error: Face " << aSrcName << " has no surface\n";
+ return 1;
+ }
+
+ BRepTools::UVBounds (aFace, aUMin, aUMax, aVMin, aVMax);
+ }
+ if (Precision::IsInfinite (aUMin) || Precision::IsInfinite (aUMax) ||
+ Precision::IsInfinite (aVMin) || Precision::IsInfinite (aVMax))
+ {
+ std::cerr << "Error: surface has infinite parametric range, aborting\n";
+ return 1;
+ }
+
+ BRepBuilderAPI_MakeFace aFaceMaker (aSurf, aUMin, aUMax, aVMin, aVMax, Precision::Confusion());
+ if (! aFaceMaker.IsDone())
+ {
+ std::cerr << "Error: cannot build face with natural bounds, aborting\n";
+ return 1;
+ }
+ TopoDS_Face aFace = aFaceMaker;
+
+ // create triangulation
+ int aNbNodes = (aNbU + 1) * (aNbV + 1);
+ int aNbTriangles = 2 * aNbU * aNbV;
+ Handle(Poly_Triangulation) aTriangulation =
+ new Poly_Triangulation (aNbNodes, aNbTriangles, Standard_False);
+
+ // fill nodes
+ TColgp_Array1OfPnt &aNodes = aTriangulation->ChangeNodes();
+ GeomAdaptor_Surface anAdSurf (aSurf);
+ double aDU = (aUMax - aUMin) / aNbU;
+ double aDV = (aVMax - aVMin) / aNbV;
+ for (int iU = 0, iShift = 1; iU <= aNbU; iU++, iShift += aNbV + 1)
+ {
+ double aU = aUMin + iU * aDU;
+ for (int iV = 0; iV <= aNbV; iV++)
+ {
+ double aV = aVMin + iV * aDV;
+ gp_Pnt aP = anAdSurf.Value (aU, aV);
+ aNodes.SetValue (iShift + iV, aP);
+ }
+ }
+
+ // fill triangles
+ Poly_Array1OfTriangle &aTriangles = aTriangulation->ChangeTriangles();
+ for (int iU = 0, iShift = 1, iTri = 0; iU < aNbU; iU++, iShift += aNbV + 1)
+ {
+ for (int iV = 0; iV < aNbV; iV++)
+ {
+ int iBase = iShift + iV;
+ Poly_Triangle aTri1 (iBase, iBase + aNbV + 2, iBase + 1);
+ Poly_Triangle aTri2 (iBase, iBase + aNbV + 1, iBase + aNbV + 2);
+ aTriangles.SetValue (++iTri, aTri1);
+ aTriangles.SetValue (++iTri, aTri2);
+ }
+ }
+
+ // put triangulation to face
+ BRep_Builder B;
+ B.UpdateFace (aFace, aTriangulation);
+
+ // fill edge polygons
+ TColStd_Array1OfInteger aUMinIso (1, aNbV + 1), aUMaxIso (1, aNbV + 1);
+ for (int iV = 0; iV <= aNbV; iV++)
+ {
+ aUMinIso.SetValue (1 + iV, 1 + iV);
+ aUMaxIso.SetValue (1 + iV, 1 + iV + aNbU * (1 + aNbV));
+ }
+ TColStd_Array1OfInteger aVMinIso (1, aNbU + 1), aVMaxIso (1, aNbU + 1);
+ for (int iU = 0; iU <= aNbU; iU++)
+ {
+ aVMinIso.SetValue (1 + iU, 1 + iU * (1 + aNbV));
+ aVMaxIso.SetValue (1 + iU, (1 + iU) * (1 + aNbV));
+ }
+ Handle(Poly_PolygonOnTriangulation) aUMinPoly = new Poly_PolygonOnTriangulation (aUMinIso);
+ Handle(Poly_PolygonOnTriangulation) aUMaxPoly = new Poly_PolygonOnTriangulation (aUMaxIso);
+ Handle(Poly_PolygonOnTriangulation) aVMinPoly = new Poly_PolygonOnTriangulation (aVMinIso);
+ Handle(Poly_PolygonOnTriangulation) aVMaxPoly = new Poly_PolygonOnTriangulation (aVMaxIso);
+ for (TopExp_Explorer exp (aFace, TopAbs_EDGE); exp.More(); exp.Next())
+ {
+ TopoDS_Edge anEdge = TopoDS::Edge (exp.Current());
+ Standard_Real aFirst, aLast;
+ Handle(Geom2d_Curve) aC = BRep_Tool::CurveOnSurface (anEdge, aFace, aFirst, aLast);
+ gp_Pnt2d aPFirst = aC->Value (aFirst);
+ gp_Pnt2d aPLast = aC->Value (aLast);
+ if (Abs (aPFirst.X() - aPLast.X()) < 0.1 * (aUMax - aUMin)) // U=const
+ {
+ if (BRep_Tool::IsClosed (anEdge, aFace))
+ B.UpdateEdge (anEdge, aUMinPoly, aUMaxPoly, aTriangulation);
+ else
+ B.UpdateEdge (anEdge, (aPFirst.X() < 0.5 * (aUMin + aUMax) ? aUMinPoly : aUMaxPoly), aTriangulation);
+ }
+ else // V=const
+ {
+ if (BRep_Tool::IsClosed (anEdge, aFace))
+ B.UpdateEdge (anEdge, aVMinPoly, aVMaxPoly, aTriangulation);
+ else
+ B.UpdateEdge (anEdge, (aPFirst.Y() < 0.5 * (aVMin + aVMax) ? aVMinPoly : aVMaxPoly), aTriangulation);
+ }
+ }
+
+ DBRep::Set (aResName, aFace);
+ return 0;
+}
+
//=======================================================================
//function : MemLeakTest
//purpose :
g = "Mesh Commands";
theCommands.Add("incmesh","Builds triangular mesh for the shape, run w/o args for help",__FILE__, incrementalmesh, g);
+ theCommands.Add("tessellate","Builds triangular mesh for the surface, run w/o args for help",__FILE__, tessellate, g);
theCommands.Add("MemLeakTest","MemLeakTest",__FILE__, MemLeakTest, g);
theCommands.Add("fastdiscret","fastdiscret shape deflection",__FILE__, fastdiscret, g);
theCommands.Add("mesh","mesh result Shape deflection",__FILE__, triangule, g);
projects / occt.git / blobdiff