b2TimeOfImpact.h
上传用户:gb3593
上传日期:2022-01-07
资源大小:3028k
文件大小:2k
- /*
- * Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com
- *
- * This software is provided 'as-is', without any express or implied
- * warranty. In no event will the authors be held liable for any damages
- * arising from the use of this software.
- * Permission is granted to anyone to use this software for any purpose,
- * including commercial applications, and to alter it and redistribute it
- * freely, subject to the following restrictions:
- * 1. The origin of this software must not be misrepresented; you must not
- * claim that you wrote the original software. If you use this software
- * in a product, an acknowledgment in the product documentation would be
- * appreciated but is not required.
- * 2. Altered source versions must be plainly marked as such, and must not be
- * misrepresented as being the original software.
- * 3. This notice may not be removed or altered from any source distribution.
- */
- #ifndef B2_TIME_OF_IMPACT_H
- #define B2_TIME_OF_IMPACT_H
- #include <Box2D/Common/b2Math.h>
- #include <Box2D/Collision/b2Distance.h>
- #include <climits>
- /// Input parameters for b2TimeOfImpact
- struct b2TOIInput
- {
- b2DistanceProxy proxyA;
- b2DistanceProxy proxyB;
- b2Sweep sweepA;
- b2Sweep sweepB;
- float32 tMax; // defines sweep interval [0, tMax]
- };
- // Output parameters for b2TimeOfImpact.
- struct b2TOIOutput
- {
- enum State
- {
- e_unknown,
- e_failed,
- e_overlapped,
- e_touching,
- e_separated
- };
- State state;
- float32 t;
- };
- /// Compute the upper bound on time before two shapes penetrate. Time is represented as
- /// a fraction between [0,tMax]. This uses a swept separating axis and may miss some intermediate,
- /// non-tunneling collision. If you change the time interval, you should call this function
- /// again.
- /// Note: use b2Distance to compute the contact point and normal at the time of impact.
- void b2TimeOfImpact(b2TOIOutput* output, const b2TOIInput* input);
- #endif