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1 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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2 | // |
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3 | // This file is part of Open CASCADE Technology software library. |
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4 | // |
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5 | // This library is free software; you can redistribute it and/or modify it under |
6 | // the terms of the GNU Lesser General Public License version 2.1 as published |
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7 | // by the Free Software Foundation, with special exception defined in the file |
8 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
9 | // distribution for complete text of the license and disclaimer of any warranty. |
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10 | // |
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11 | // Alternatively, this file may be used under the terms of Open CASCADE |
12 | // commercial license or contractual agreement. |
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13 | |
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14 | #include <StlAPI_Reader.hxx> |
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15 | |
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16 | #include <BRep_Builder.hxx> |
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17 | #include <BRepBuilderAPI_MakeFace.hxx> |
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18 | #include <BRepBuilderAPI_MakePolygon.hxx> |
19 | #include <BRepBuilderAPI_MakeVertex.hxx> |
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20 | #include <BRepBuilderAPI_Sewing.hxx> |
21 | #include <gp_Pnt.hxx> |
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22 | #include <OSD_Path.hxx> |
23 | #include <RWStl.hxx> |
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24 | #include <TopoDS_Compound.hxx> |
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25 | #include <TopoDS_Edge.hxx> |
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26 | #include <TopoDS_Face.hxx> |
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27 | #include <TopoDS_Shape.hxx> |
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28 | #include <TopoDS_Shell.hxx> |
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29 | #include <TopoDS_Vertex.hxx> |
30 | #include <TopoDS_Wire.hxx> |
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31 | |
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32 | //============================================================================= |
33 | //function : Read |
34 | //purpose : |
35 | //============================================================================= |
36 | Standard_Boolean StlAPI_Reader::Read (TopoDS_Shape& theShape, |
37 | const Standard_CString theFileName) |
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38 | { |
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39 | Handle(Poly_Triangulation) aMesh = RWStl::ReadFile (theFileName); |
40 | if (aMesh.IsNull()) |
41 | { |
42 | return Standard_False; |
43 | } |
44 | |
45 | TopoDS_Vertex aTriVertexes[3]; |
46 | TopoDS_Face aFace; |
47 | TopoDS_Wire aWire; |
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48 | BRepBuilderAPI_Sewing aSewingTool; |
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49 | aSewingTool.Init (1.0e-06, Standard_True); |
50 | |
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51 | TopoDS_Compound aComp; |
52 | BRep_Builder BuildTool; |
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53 | BuildTool.MakeCompound (aComp); |
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54 | |
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55 | const TColgp_Array1OfPnt& aNodes = aMesh->Nodes(); |
56 | const Poly_Array1OfTriangle& aTriangles = aMesh->Triangles(); |
57 | for (Standard_Integer aTriIdx = aTriangles.Lower(); |
58 | aTriIdx <= aTriangles.Upper(); |
59 | ++aTriIdx) |
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60 | { |
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61 | const Poly_Triangle& aTriangle = aTriangles(aTriIdx); |
62 | |
63 | Standard_Integer anId[3]; |
64 | aTriangle.Get(anId[0], anId[1], anId[2]); |
65 | |
66 | const gp_Pnt& aPnt1 = aNodes (anId[0]); |
67 | const gp_Pnt& aPnt2 = aNodes (anId[1]); |
68 | const gp_Pnt& aPnt3 = aNodes (anId[2]); |
69 | if ((!(aPnt1.IsEqual (aPnt2, 0.0))) |
70 | && (!(aPnt1.IsEqual (aPnt3, 0.0)))) |
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71 | { |
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72 | aTriVertexes[0] = BRepBuilderAPI_MakeVertex (aPnt1); |
73 | aTriVertexes[1] = BRepBuilderAPI_MakeVertex (aPnt2); |
74 | aTriVertexes[2] = BRepBuilderAPI_MakeVertex (aPnt3); |
75 | |
76 | aWire = BRepBuilderAPI_MakePolygon (aTriVertexes[0], aTriVertexes[1], aTriVertexes[2], Standard_True); |
77 | if (!aWire.IsNull()) |
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78 | { |
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79 | aFace = BRepBuilderAPI_MakeFace (aWire); |
80 | if (!aFace.IsNull()) |
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81 | { |
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82 | BuildTool.Add (aComp, aFace); |
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83 | } |
84 | } |
85 | } |
86 | } |
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87 | |
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88 | aSewingTool.Load (aComp); |
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89 | aSewingTool.Perform(); |
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90 | theShape = aSewingTool.SewedShape(); |
91 | if (theShape.IsNull()) |
92 | { |
93 | theShape = aComp; |
94 | } |
95 | return Standard_True; |
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96 | } |