# Visualization Library

A lightweight C++ OpenGL middleware for 2D/3D graphics

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# D:/VL/BuildSystem/VL_DISTRO/Visualization_Library_SDK/src/vlGraphics/Frustum.hpp

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    00001 /**************************************************************************************/
    00002 /*                                                                                    */
    00003 /*  Visualization Library                                                             */
    00004 /*  http://www.visualizationlibrary.com                                               */
    00005 /*                                                                                    */
    00006 /*  Copyright (c) 2005-2010, Michele Bosi                                             */
    00007 /*  All rights reserved.                                                              */
    00008 /*                                                                                    */
    00009 /*  Redistribution and use in source and binary forms, with or without modification,  */
    00010 /*  are permitted provided that the following conditions are met:                     */
    00011 /*                                                                                    */
    00012 /*  - Redistributions of source code must retain the above copyright notice, this     */
    00013 /*  list of conditions and the following disclaimer.                                  */
    00014 /*                                                                                    */
    00015 /*  - Redistributions in binary form must reproduce the above copyright notice, this  */
    00016 /*  list of conditions and the following disclaimer in the documentation and/or       */
    00017 /*  other materials provided with the distribution.                                   */
    00018 /*                                                                                    */
    00019 /*  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND   */
    00020 /*  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED     */
    00021 /*  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE            */
    00022 /*  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR  */
    00023 /*  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES    */
    00024 /*  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;      */
    00025 /*  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON    */
    00026 /*  ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT           */
    00027 /*  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS     */
    00028 /*  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.                      */
    00029 /*                                                                                    */
    00030 /**************************************************************************************/
    00031
    00032 #ifndef Frustum_INCLUDE_ONCE
    00033 #define Frustum_INCLUDE_ONCE
    00034
    00035 #include <vlCore/Plane.hpp>
    00036 #include <vlCore/AABB.hpp>
    00037 #include <vlCore/Sphere.hpp>
    00038
    00039 namespace vl
    00040 {
    00041   //-----------------------------------------------------------------------------
    00042   // Frustum
    00043   //-----------------------------------------------------------------------------
    00049   class Frustum: public Object
    00050   {
    00051   public:
    00052     virtual const char* className() { return "vl::Frustum"; }
    00053
    00054     std::vector<Plane>& planes() { return mPlanes; }
    00055     const std::vector<Plane>& planes() const { return mPlanes; }
    00056
    00057     void setPlane(unsigned i, const Plane& plane) { VL_CHECK(i<mPlanes.size()); mPlanes[i] = plane; }
    00058     const Plane& plane(unsigned i) const { VL_CHECK(i<mPlanes.size()); return mPlanes[i]; }
    00059
    00060     bool cull(const Sphere& sphere) const
    00061     {
    00062       // null spheres are always visible
    00063       if (sphere.isNull())
    00064         return false;
    00065       for(unsigned i=0; i<planes().size(); ++i)
    00066       {
    00067         if ( plane(i).distance(sphere.center()) > sphere.radius() )
    00068           return true;
    00069       }
    00070       return false;
    00071     }
    00072
    00073     bool cull(const AABB& aabb) const
    00074     {
    00075       if (aabb.isNull())
    00076         return false;
    00077       for(unsigned i=0; i<planes().size(); ++i)
    00078       {
    00079         if ( plane(i).isOutside(aabb) )
    00080           return true;
    00081       }
    00082       return false;
    00083     }
    00084
    00085     bool cull(const std::vector<fvec3>& points) const
    00086     {
    00087       for(unsigned i=0; i<planes().size(); ++i)
    00088       {
    00089         unsigned j=0;
    00090         for(; j<points.size(); ++j)
    00091           if ( plane(i).distance((vec3)points[j]) <= 0 )
    00092             break;
    00093         if(j == points.size())
    00094           return true;
    00095       }
    00096       return false;
    00097     }
    00098
    00099   protected:
    00100     std::vector<Plane> mPlanes;
    00101   };
    00102 }
    00103
    00104 #endif

Visualization Library v2011.05.1142 Reference Documentation
Copyright 2005-2011 Michele Bosi. All rights reserved.
Updated on Thu May 26 2011 22:51:23.
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