00001 //------------------------------------------------------------------------------ 00002 // Lamp : Open source game middleware 00003 // Copyright (C) 2004 Junpei Ohtani ( Email : junpee@users.sourceforge.jp ) 00004 // 00005 // This library is free software; you can redistribute it and/or 00006 // modify it under the terms of the GNU Lesser General Public 00007 // License as published by the Free Software Foundation; either 00008 // version 2.1 of the License, or (at your option) any later version. 00009 // 00010 // This library is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 // Lesser General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU Lesser General Public 00016 // License along with this library; if not, write to the Free Software 00017 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 00018 //------------------------------------------------------------------------------ 00019 00020 /** @file 00021 * ライン交差実装 00022 * @author Junpee 00023 */ 00024 00025 #include "LampBasic.h" 00026 #include "Geometry/Intersection/LineIntersection.h" 00027 00028 namespace Lamp{ 00029 00030 //------------------------------------------------------------------------------ 00031 // 点 00032 //------------------------------------------------------------------------------ 00033 // 点交差 00034 bool LineIntersection::intersect( 00035 const Line& line, const Vector3& point, float range){ 00036 Assert(false); 00037 return false; 00038 } 00039 //------------------------------------------------------------------------------ 00040 // ライン 00041 //------------------------------------------------------------------------------ 00042 // ライン交差 00043 bool LineIntersection::intersect( 00044 const Line& line0, const Line& line1, float range){ 00045 return (line0.getSquaredDistance(line1) <= (range * range)); 00046 } 00047 //------------------------------------------------------------------------------ 00048 // 指向性ボックス 00049 //------------------------------------------------------------------------------ 00050 // 指向性ボックス交差 00051 bool LineIntersection::intersect(const Line& line, const OrientedBox& ob){ 00052 Assert(false); 00053 return false; 00054 } 00055 //------------------------------------------------------------------------------ 00056 // 平面 00057 //------------------------------------------------------------------------------ 00058 // 平面交差 00059 bool LineIntersection::intersect(const Line& line, const Plane& plane){ 00060 float denominator = line.getDirection().dotProduct(plane.getNormal()); 00061 if(Math::abs(denominator) <= Math::epsilon){ 00062 // 面に平行なレイは原点が面に接していれば交差 00063 float distance = plane.getDistance(line.getOrigin()); 00064 return (Math::abs(distance) <= Math::epsilon); 00065 } 00066 // 平行でなければ交差 00067 return true; 00068 } 00069 //------------------------------------------------------------------------------ 00070 // レイ 00071 //------------------------------------------------------------------------------ 00072 // レイ交差 00073 bool LineIntersection::intersect( 00074 const Line& line, const Ray& ray, float range){ 00075 return (line.getSquaredDistance(ray) <= (range * range)); 00076 } 00077 //------------------------------------------------------------------------------ 00078 // セグメント 00079 //------------------------------------------------------------------------------ 00080 // セグメント交差 00081 bool LineIntersection::intersect( 00082 const Line& line, const Segment& segment, float range){ 00083 return (line.getSquaredDistance(segment) <= (range * range)); 00084 } 00085 //------------------------------------------------------------------------------ 00086 // 球 00087 //------------------------------------------------------------------------------ 00088 // 球交差 00089 bool LineIntersection::intersect(const Line& line, const Sphere& sphere){ 00090 // 球中心との距離が球半径以内なら交差する 00091 float squaredDistance = line.getSquaredDistance(sphere.getCenter()); 00092 float radius = sphere.getRadius(); 00093 return (squaredDistance <= (radius * radius)); 00094 } 00095 //------------------------------------------------------------------------------ 00096 // 三角 00097 //------------------------------------------------------------------------------ 00098 // 三角交差 00099 bool LineIntersection::intersect(const Line& line, const Triangle& triangle){ 00100 Assert(false); 00101 return false; 00102 } 00103 //------------------------------------------------------------------------------ 00104 } // End of namespace Lamp 00105 //------------------------------------------------------------------------------