1 // Created on: 1997-07-22
2 // Created by: Laurent PAINNOT
3 // Copyright (c) 1997-1999 Matra Datavision
4 // Copyright (c) 1999-2014 OPEN CASCADE SAS
6 // This file is part of Open CASCADE Technology software library.
8 // This library is free software; you can redistribute it and/or modify it under
9 // the terms of the GNU Lesser General Public License version 2.1 as published
10 // by the Free Software Foundation, with special exception defined in the file
11 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
12 // distribution for complete text of the license and disclaimer of any warranty.
14 // Alternatively, this file may be used under the terms of Open CASCADE
15 // commercial license or contractual agreement.
17 #include <DrawTrSurf_Triangulation2D.ixx>
18 #include <Poly_Connect.hxx>
19 #include <Poly_Triangle.hxx>
20 #include <Poly_Array1OfTriangle.hxx>
21 #include <TColStd_Array1OfInteger.hxx>
22 #include <TColgp_Array1OfPnt2d.hxx>
23 #include <gp_Pnt2d.hxx>
24 #include <Draw_Color.hxx>
31 //=======================================================================
32 //function : DrawTrSurf_Triangulation2D
34 //=======================================================================
36 DrawTrSurf_Triangulation2D::DrawTrSurf_Triangulation2D
37 (const Handle(Poly_Triangulation)& T):
40 // Build the connect tool
43 Standard_Integer i,j,nFree, nInternal, nbTriangles = T->NbTriangles();
44 Standard_Integer t[3];
46 // count the free edges
48 for (i = 1; i <= nbTriangles; i++) {
49 pc.Triangles(i,t[0],t[1],t[2]);
50 for (j = 0; j < 3; j++)
51 if (t[j] == 0) nFree++;
54 // allocate the arrays
55 myFree = new TColStd_HArray1OfInteger(1,2*nFree);
56 nInternal = (3*nbTriangles - nFree) / 2;
57 myInternals = new TColStd_HArray1OfInteger(1,2*nInternal);
59 TColStd_Array1OfInteger& Free = myFree->ChangeArray1();
60 TColStd_Array1OfInteger& Internal = myInternals->ChangeArray1();
62 Standard_Integer fr = 1, in = 1;
63 const Poly_Array1OfTriangle& triangles = T->Triangles();
64 Standard_Integer n[3];
65 for (i = 1; i <= nbTriangles; i++) {
66 pc.Triangles(i,t[0],t[1],t[2]);
67 triangles(i).Get(n[0],n[1],n[2]);
68 for (j = 0; j < 3; j++) {
69 Standard_Integer k = (j+1) % 3;
75 // internal edge if this triangle has a lower index than the adjacent
78 Internal(in+1) = n[k];
85 //=======================================================================
86 //function : Triangulation
88 //=======================================================================
90 Handle(Poly_Triangulation) DrawTrSurf_Triangulation2D::Triangulation() const
92 return myTriangulation;
95 //=======================================================================
98 //=======================================================================
100 void DrawTrSurf_Triangulation2D::DrawOn(Draw_Display& dis) const
103 Standard_Integer i,n;
104 if (myTriangulation->HasUVNodes()) {
106 const TColgp_Array1OfPnt2d& Nodes = myTriangulation->UVNodes();
110 dis.SetColor(Draw_rouge);
111 const TColStd_Array1OfInteger& Free = myFree->Array1();
112 n = Free.Length() / 2;
113 for (i = 1; i <= n; i++) {
114 dis.Draw(Nodes(Free(2*i-1)),Nodes(Free(2*i)));
119 dis.SetColor(Draw_bleu);
120 const TColStd_Array1OfInteger& Internal = myInternals->Array1();
121 n = Internal.Length() / 2;
122 for (i = 1; i <= n; i++) {
123 dis.Draw(Nodes(Internal(2*i-1)),Nodes(Internal(2*i)));
129 //=======================================================================
132 //=======================================================================
134 Handle(Draw_Drawable3D) DrawTrSurf_Triangulation2D::Copy() const
136 return new DrawTrSurf_Triangulation2D(myTriangulation);
139 //=======================================================================
142 //=======================================================================
144 void DrawTrSurf_Triangulation2D::Dump(Standard_OStream& S) const
146 Poly::Dump(myTriangulation,S);
149 //=======================================================================
152 //=======================================================================
154 void DrawTrSurf_Triangulation2D::Whatis(Draw_Interpretor& I) const
156 I << "triangulation";