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c827ea3a68
0025301: Visualization, TKOpenGl - transpose matrix manually before glUniformMatrix4fv() OpenGl_View::ReleaseGlResources() - release GL resources of trihedron, do not destroy it
75 lines
2.5 KiB
C++
75 lines
2.5 KiB
C++
// Created on: 2014-10-15
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// Created by: Denis Bogolepov
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// Copyright (c) 2014 OPEN CASCADE SAS
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//
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// This file is part of Open CASCADE Technology software library.
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//
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// This library is free software; you can redistribute it and/or modify it under
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// the terms of the GNU Lesser General Public License version 2.1 as published
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// by the Free Software Foundation, with special exception defined in the file
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// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
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// distribution for complete text of the license and disclaimer of any warranty.
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//
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// Alternatively, this file may be used under the terms of Open CASCADE
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// commercial license or contractual agreement.
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#ifndef OpenGl_Quadric_Header
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#define OpenGl_Quadric_Header
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#include <OpenGl_PrimitiveArray.hxx>
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//! Class for rendering of arbitrary primitive array.
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//! Tool class for generating tessellation of quadric surface.
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class OpenGl_Quadric : public OpenGl_PrimitiveArray
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{
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public:
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//! Creates undefined abstract quadric surface
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Standard_EXPORT OpenGl_Quadric();
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//! Returns true if quadric has been defined
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Standard_Boolean IsDefined() const { return myNbSlices != 0; }
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//! Returns number of slices
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Standard_Integer NbSlices() const { return myNbSlices; }
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//! Returns number of stacks
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Standard_Integer NbStacks() const { return myNbStacks; }
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//! Returns total number of vertices
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Standard_Integer NbVertices() const { return (myNbSlices + 1) * (myNbStacks + 1); }
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//! Returns total number of triangles
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Standard_Integer NbTriangles() const { return myNbSlices * myNbStacks * 2; }
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//! Release GL resources
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virtual void Release (OpenGl_Context* theContext) Standard_OVERRIDE;
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protected:
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//! Returns surface point for the given parameters.
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virtual OpenGl_Vec3 evalVertex (const Standard_ShortReal theU,
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const Standard_ShortReal theV) const = 0;
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//! Returns surface normal for the given parameters.
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virtual OpenGl_Vec3 evalNormal (const Standard_ShortReal theU,
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const Standard_ShortReal theV) const = 0;
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//! Initialize primitive.
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Standard_EXPORT Standard_Boolean init (const Standard_Integer theNbSlices,
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const Standard_Integer theNbStacks);
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private:
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//! Initialize arrays.
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Standard_Boolean createArrays() const;
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private:
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Standard_Integer myNbSlices; //!< Number of slices (u partitions)
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Standard_Integer myNbStacks; //!< Number of stacks (v partitions)
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};
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#endif // OpenGl_Quadric_Header
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