1 // File: DrawTrSurf_Triangulation2D.cxx
2 // Created: Tue Jul 22 15:10:36 1997
3 // Author: Laurent PAINNOT
4 // <lpa@penox.paris1.matra-dtv.fr>
7 #include <DrawTrSurf_Triangulation2D.ixx>
8 #include <Poly_Connect.hxx>
9 #include <Poly_Triangle.hxx>
10 #include <Poly_Array1OfTriangle.hxx>
11 #include <TColStd_Array1OfInteger.hxx>
12 #include <TColgp_Array1OfPnt2d.hxx>
13 #include <gp_Pnt2d.hxx>
14 #include <Draw_Color.hxx>
21 //=======================================================================
22 //function : DrawTrSurf_Triangulation2D
24 //=======================================================================
26 DrawTrSurf_Triangulation2D::DrawTrSurf_Triangulation2D
27 (const Handle(Poly_Triangulation)& T):
30 // Build the connect tool
33 Standard_Integer i,j,nFree, nInternal, nbTriangles = T->NbTriangles();
34 Standard_Integer t[3];
36 // count the free edges
38 for (i = 1; i <= nbTriangles; i++) {
39 pc.Triangles(i,t[0],t[1],t[2]);
40 for (j = 0; j < 3; j++)
41 if (t[j] == 0) nFree++;
44 // allocate the arrays
45 myFree = new TColStd_HArray1OfInteger(1,2*nFree);
46 nInternal = (3*nbTriangles - nFree) / 2;
47 myInternals = new TColStd_HArray1OfInteger(1,2*nInternal);
49 TColStd_Array1OfInteger& Free = myFree->ChangeArray1();
50 TColStd_Array1OfInteger& Internal = myInternals->ChangeArray1();
52 Standard_Integer fr = 1, in = 1;
53 const Poly_Array1OfTriangle& triangles = T->Triangles();
54 Standard_Integer n[3];
55 for (i = 1; i <= nbTriangles; i++) {
56 pc.Triangles(i,t[0],t[1],t[2]);
57 triangles(i).Get(n[0],n[1],n[2]);
58 for (j = 0; j < 3; j++) {
59 Standard_Integer k = (j+1) % 3;
65 // internal edge if this triangle has a lower index than the adjacent
68 Internal(in+1) = n[k];
75 //=======================================================================
76 //function : Triangulation
78 //=======================================================================
80 Handle(Poly_Triangulation) DrawTrSurf_Triangulation2D::Triangulation() const
82 return myTriangulation;
85 //=======================================================================
88 //=======================================================================
90 void DrawTrSurf_Triangulation2D::DrawOn(Draw_Display& dis) const
94 if (myTriangulation->HasUVNodes()) {
96 const TColgp_Array1OfPnt2d& Nodes = myTriangulation->UVNodes();
100 dis.SetColor(Draw_rouge);
101 const TColStd_Array1OfInteger& Free = myFree->Array1();
102 n = Free.Length() / 2;
103 for (i = 1; i <= n; i++) {
104 dis.Draw(Nodes(Free(2*i-1)),Nodes(Free(2*i)));
109 dis.SetColor(Draw_bleu);
110 const TColStd_Array1OfInteger& Internal = myInternals->Array1();
111 n = Internal.Length() / 2;
112 for (i = 1; i <= n; i++) {
113 dis.Draw(Nodes(Internal(2*i-1)),Nodes(Internal(2*i)));
119 //=======================================================================
122 //=======================================================================
124 Handle(Draw_Drawable3D) DrawTrSurf_Triangulation2D::Copy() const
126 return new DrawTrSurf_Triangulation2D(myTriangulation);
129 //=======================================================================
132 //=======================================================================
134 void DrawTrSurf_Triangulation2D::Dump(Standard_OStream& S) const
136 Poly::Dump(myTriangulation,S);
139 //=======================================================================
142 //=======================================================================
144 void DrawTrSurf_Triangulation2D::Whatis(Draw_Interpretor& I) const
146 I << "triangulation";