00001 /* 00002 * Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com 00003 * 00004 * This software is provided 'as-is', without any express or implied 00005 * warranty. In no event will the authors be held liable for any damages 00006 * arising from the use of this software. 00007 * Permission is granted to anyone to use this software for any purpose, 00008 * including commercial applications, and to alter it and redistribute it 00009 * freely, subject to the following restrictions: 00010 * 1. The origin of this software must not be misrepresented; you must not 00011 * claim that you wrote the original software. If you use this software 00012 * in a product, an acknowledgment in the product documentation would be 00013 * appreciated but is not required. 00014 * 2. Altered source versions must be plainly marked as such, and must not be 00015 * misrepresented as being the original software. 00016 * 3. This notice may not be removed or altered from any source distribution. 00017 */ 00018 00019 #ifndef B2_TIME_OF_IMPACT_H 00020 #define B2_TIME_OF_IMPACT_H 00021 00022 #include <Box2D/Common/b2Math.h> 00023 #include <Box2D/Collision/b2Distance.h> 00024 #include <climits> 00025 00027 struct b2TOIInput 00028 { 00029 b2DistanceProxy proxyA; 00030 b2DistanceProxy proxyB; 00031 b2Sweep sweepA; 00032 b2Sweep sweepB; 00033 float32 tMax; // defines sweep interval [0, tMax] 00034 }; 00035 00036 // Output parameters for b2TimeOfImpact. 00037 struct b2TOIOutput 00038 { 00039 enum State 00040 { 00041 e_unknown, 00042 e_failed, 00043 e_overlapped, 00044 e_touching, 00045 e_separated 00046 }; 00047 00048 State state; 00049 float32 t; 00050 }; 00051 00057 void b2TimeOfImpact(b2TOIOutput* output, const b2TOIInput* input); 00058 00059 #endif