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00001 /**************************************************************************************/ 00002 /* */ 00003 /* Visualization Library */ 00004 /* http://www.visualizationlibrary.org */ 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 VL_INSTRUMENT_CLASS(vl::Frustum, Object) 00052 00053 public: 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