1 // Copyright (c) 2013 OPEN CASCADE SAS
3 // This file is part of Open CASCADE Technology software library.
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.
11 // Alternatively, this file may be used under the terms of Open CASCADE
12 // commercial license or contractual agreement.
14 #ifndef _StdPrs_ToolTriangulatedShape_HeaderFile
15 #define _StdPrs_ToolTriangulatedShape_HeaderFile
17 #include <Poly_Triangulation.hxx>
18 #include <Prs3d_Drawer.hxx>
19 #include <Standard.hxx>
20 #include <Standard_Macro.hxx>
21 #include <TColgp_Array1OfDir.hxx>
24 class TopLoc_Location;
27 class Poly_Triangulation;
30 class StdPrs_ToolTriangulatedShape
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);
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);
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);
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);
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);
63 //! If presentation has own deviation coefficient and IsAutoTriangulation() is true,
64 //! function will compare actual coefficients with previous values and will clear triangulation on their change
65 //! (regardless actual tessellation quality).
66 //! Function is placed here for compatibility reasons - new code should avoid using IsAutoTriangulation().
67 //! @param theShape [in] the shape
68 //! @param theDrawer [in] the display settings
69 //! @param theToResetCoeff [in] updates coefficients in theDrawer to actual state to avoid redundant recomputations
70 Standard_EXPORT static void ClearOnOwnDeflectionChange (const TopoDS_Shape& theShape,
71 const Handle(Prs3d_Drawer)& theDrawer,
72 const Standard_Boolean theToResetCoeff);