0027015: Sewing returns invalid shape if some faces are nearly plane cones
[occt.git] / src / StdPrs / StdPrs_ToolTriangulatedShape.hxx
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5ad8c033 1// Copyright (c) 2013 OPEN CASCADE SAS
2//
3// This file is part of Open CASCADE Technology software library.
4//
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
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.
10//
11// Alternatively, this file may be used under the terms of Open CASCADE
12// commercial license or contractual agreement.
13
14#ifndef _StdPrs_ToolTriangulatedShape_HeaderFile
15#define _StdPrs_ToolTriangulatedShape_HeaderFile
16
17#include <Poly_Triangulation.hxx>
18#include <Prs3d_Drawer.hxx>
19#include <Standard.hxx>
20#include <Standard_Macro.hxx>
21#include <TColgp_Array1OfDir.hxx>
22
23class TopoDS_Face;
24class TopLoc_Location;
25class TopoDS_Shape;
26class Prs3d_Drawer;
27class Poly_Triangulation;
28class Poly_Connect;
29
30class StdPrs_ToolTriangulatedShape
31{
32public:
33
34 //! Similar to BRepTools::Triangulation() but without extra checks.
35 //! @return true if all faces within shape are triangulated.
36 Standard_EXPORT static Standard_Boolean IsTriangulated (const TopoDS_Shape& theShape);
37
38 //! Checks back faces visibility for specified shape (to activate back-face culling). <br>
39 //! @return true if shape is closed manifold Solid or compound of such Solids. <br>
40 Standard_EXPORT static Standard_Boolean IsClosed (const TopoDS_Shape& theShape);
41
42 //! Evaluate normals for a triangle of a face.
43 //! @param theFace [in] the face.
44 //! @param thePolyConnect [in] the definition of a face triangulation.
45 //! @param theNormal [out] the array of normals for each triangle.
46 Standard_EXPORT static void Normal (const TopoDS_Face& theFace,
47 Poly_Connect& thePolyConnect,
48 TColgp_Array1OfDir& theNormals);
49
50 //! Checks whether the shape is properly triangulated for a given display settings.
51 //! @param theShape [in] the shape.
52 //! @param theDrawer [in] the display settings.
53 Standard_EXPORT static Standard_Boolean IsTessellated (const TopoDS_Shape& theShape,
54 const Handle(Prs3d_Drawer)& theDrawer);
55
56 //! Validates triangulation within the shape and performs tessellation if necessary.
57 //! @param theShape [in] the shape.
58 //! @param theDrawer [in] the display settings.
59 //! @return true if tesselation was recomputed and false otherwise.
60 Standard_EXPORT static Standard_Boolean Tessellate (const TopoDS_Shape& theShape,
61 const Handle(Prs3d_Drawer)& theDrawer);
62};
63
64#endif