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Documentation                       Search   NLPACS::CEdgeCollide Class Reference Collisions against edge in 2D. More... #include <edge_collide.h> Inheritance diagram for NLPACS::CEdgeCollide: List of all members. Public Types enum   TPointMoveProblem {   ParallelEdges = 0, StartOnEdge, StopOnEdge, TraverseEndPoint,   EdgeNull, PointMoveProblemCount } Public Methods void  make (const CVector2f &p0, const CVector2f &p1) CRational64  testPointMove (const CVector2f &start, const CVector2f &end, TPointMoveProblem &moveBug)   return 1 either if no collision occurs. More... float  testCircleMove (const CVector2f &start, const CVector2f &delta, float radius, CVector2f &normal)   return 1 either if the circle moves away from the line, or no collision occurs. More... float  testBBoxMove (const CVector2f &start, const CVector2f &delta, const CVector2f bbox[4], CVector2f &normal)   return 1 either if the bbox moves away from the line, or no collision occurs. More... bool  testBBoxCollide (const CVector2f bbox[4])   return true if this oriented bbox collide this edge. More... Public Attributes CVector2f  P0 CVector2f  P1 CVector2f  Dir CVector2f  Norm float  A0 float  A1 float  C Private Methods bool  testEdgeMove (const CVector2f &q0, const CVector2f &q1, const CVector2f &delta, float &tMin, float &tMax, bool &normalOnBox)   test if edge collide against me. More... Detailed Description Collisions against edge in 2D. Author: Lionel Berenguier , Nevrax France Date: 2001 Definition at line 180 of file edge_collide.h. Member Enumeration Documentation enum NLPACS::CEdgeCollide::TPointMoveProblem   Enumeration values: ParallelEdges  StartOnEdge  StopOnEdge  TraverseEndPoint  EdgeNull  PointMoveProblemCount  Definition at line 183 of file edge_collide.h. Member Function Documentation void NLPACS::CEdgeCollide::make (  const CVector2f &    p0, const CVector2f &    p1 )    Definition at line 43 of file edge_collide.cpp. References A0, A1, C, Dir, Norm, P0, and P1. bool NLPACS::CEdgeCollide::testBBoxCollide (  const CVector2f    bbox[4] )    return true if this oriented bbox collide this edge. Parameters: bbox  4 points of the bbox, in CCW. Returns: true if collision occurs. Definition at line 634 of file edge_collide.cpp. References P0, and P1. float NLPACS::CEdgeCollide::testBBoxMove (  const CVector2f &    start, const CVector2f &    delta, const CVector2f    bbox[4], CVector2f &    normal )    return 1 either if the bbox moves away from the line, or no collision occurs. Else return a [0,1[ interval. If collision occurs (ie return<1), return in "normal" the normal of the collision. It may be normal of edge (+-), or normal against a point of the edge. Parameters: bbox  4 points of the bbox at start. start must be the barycentre of those points. Definition at line 536 of file edge_collide.cpp. References C, min, Norm, and testEdgeMove. float NLPACS::CEdgeCollide::testCircleMove (  const CVector2f &    start, const CVector2f &    delta, float    radius, CVector2f &    normal )    return 1 either if the circle moves away from the line, or no collision occurs. Else return a [0,1[ interval. If collision occurs (ie return<1), return in "normal" the normal of the collision. It may be normal of edge (+-), or normal against a point of the edge. Definition at line 250 of file edge_collide.cpp. References A0, A1, C, Dir, min, Norm, P0, P1, t, and NLPACS::testCirclePoint. bool NLPACS::CEdgeCollide::testEdgeMove (  const CVector2f &    q0, const CVector2f &    q1, const CVector2f &    delta, float &    tMin, float &    tMax, bool &    normalOnBox )  [private]   test if edge collide against me. if true, return time intervals of collisions (]-oo, +oo[). NB: for simplicity, if lines are //, return false. Definition at line 371 of file edge_collide.cpp. References NLPACS::EdgeCollideEpsilon, min, P0, and P1. Referenced by testBBoxMove. CRational64 NLPACS::CEdgeCollide::testPointMove (  const CVector2f &    start, const CVector2f &    end, TPointMoveProblem &    moveBug )    return 1 either if no collision occurs. Else return a [0,1[ interval. return -1 if precision problem (see below). This method is used by CGlobalRetriever::doMove(). UnManageables cases arise when: the movement start/stop on a edge (dist==0). In this case, don't know on what surface we arrive (before or after). the movement is // to the edge and collide with it. same problem than stop on an edge. the movement traverse the edge on an endpoint. In this case, there is 2+ edges sharing the point, and result is undefined. On thoses cases, moveBug is filled, and -1 is returned. Definition at line 60 of file edge_collide.cpp. References EdgeNull, NLMISC::fsgn, nlassert, nlwarning, P0, P1, ParallelEdges, StartOnEdge, StopOnEdge, and TraverseEndPoint. Member Data Documentation float NLPACS::CEdgeCollide::A0   Definition at line 190 of file edge_collide.h. Referenced by make, and testCircleMove. float NLPACS::CEdgeCollide::A1   Definition at line 190 of file edge_collide.h. Referenced by make, and testCircleMove. float NLPACS::CEdgeCollide::C   Definition at line 191 of file edge_collide.h. Referenced by make, testBBoxMove, and testCircleMove. CVector2f NLPACS::CEdgeCollide::Dir   Definition at line 189 of file edge_collide.h. Referenced by make, and testCircleMove. CVector2f NLPACS::CEdgeCollide::Norm   Definition at line 189 of file edge_collide.h. Referenced by make, testBBoxMove, and testCircleMove. CVector2f NLPACS::CEdgeCollide::P0   Definition at line 187 of file edge_collide.h. Referenced by make, testBBoxCollide, testCircleMove, testEdgeMove, and testPointMove. CVector2f NLPACS::CEdgeCollide::P1   Definition at line 188 of file edge_collide.h. Referenced by make, testBBoxCollide, testCircleMove, testEdgeMove, and testPointMove. The documentation for this class was generated from the following files: edge_collide.h edge_collide.cpp