1 // Created on: 2016-02-04
2 // Created by: Anastasia BORISOVA
3 // Copyright (c) 2016 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
16 #ifndef _Prs3d_ToolQuadric_HeaderFile
17 #define _Prs3d_ToolQuadric_HeaderFile
19 #include <Graphic3d_ArrayOfTriangles.hxx>
20 #include <Poly_Triangulation.hxx>
22 //! Base class to build 3D surfaces presentation of quadric surfaces.
23 class Prs3d_ToolQuadric
28 //! Return number of triangles for presentation with the given params.
29 static Standard_Integer TrianglesNb (const Standard_Integer theSlicesNb,
30 const Standard_Integer theStacksNb)
32 return theSlicesNb * theStacksNb * 2;
35 //! Return number of vertices for presentation with the given params.
36 static Standard_Integer VerticesNb (const Standard_Integer theSlicesNb,
37 const Standard_Integer theStacksNb,
38 const Standard_Boolean theIsIndexed = Standard_True)
41 ? (theSlicesNb + 1) * (theStacksNb + 1)
42 : TrianglesNb (theSlicesNb, theStacksNb) * 3;
47 //! Generate primitives for 3D quadric surface presentation.
48 //! @param theTrsf [in] optional transformation to apply
49 //! @return generated triangulation
50 Standard_EXPORT Handle(Graphic3d_ArrayOfTriangles) CreateTriangulation (const gp_Trsf& theTrsf) const;
52 //! Generate primitives for 3D quadric surface presentation.
53 //! @param theTrsf [in] optional transformation to apply
54 //! @return generated triangulation
55 Standard_EXPORT Handle(Poly_Triangulation) CreatePolyTriangulation (const gp_Trsf& theTrsf) const;
57 //! Generate primitives for 3D quadric surface and fill the given array.
58 //! @param theArray [in][out] the array of vertices;
59 //! when NULL, function will create an indexed array;
60 //! when not NULL, triangles will be appended to the end of array
61 //! (will raise an exception if reserved array size is not large enough)
62 //! @param theTrsf [in] optional transformation to apply
63 Standard_EXPORT void FillArray (Handle(Graphic3d_ArrayOfTriangles)& theArray,
64 const gp_Trsf& theTrsf) const;
66 //! Return number of triangles in generated presentation.
67 Standard_Integer TrianglesNb() const { return mySlicesNb * myStacksNb * 2; }
69 //! Return number of vertices in generated presentation.
70 Standard_Integer VerticesNb (bool theIsIndexed = true) const
73 ? (mySlicesNb + 1) * (myStacksNb + 1)
79 //! Generate primitives for 3D quadric surface presentation.
80 //! @param theArray [out] generated array of triangles
81 //! @param theTriangulation [out] generated triangulation
82 //! @param theTrsf [in] optional transformation to apply
83 Standard_DEPRECATED("Deprecated method, CreateTriangulation() and CreatePolyTriangulation() should be used instead")
84 Standard_EXPORT void FillArray (Handle(Graphic3d_ArrayOfTriangles)& theArray,
85 Handle(Poly_Triangulation)& theTriangulation,
86 const gp_Trsf& theTrsf) const;
90 //! Redefine this method to generate vertex at given parameters.
91 virtual gp_Pnt Vertex (const Standard_Real theU, const Standard_Real theV) const = 0;
93 //! Redefine this method to generate normal at given parameters.
94 virtual gp_Dir Normal (const Standard_Real theU, const Standard_Real theV) const = 0;
98 Standard_Integer mySlicesNb; //!< number of slices within U parameter
99 Standard_Integer myStacksNb; //!< number of stacks within V parameter
102 #endif // _Prs3d_ToolQuadric_HeaderFile