/usr/include/Box2D/Collision/b2TimeOfImpact.h is in libbox2d-dev 2.3.0+ds-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | /*
* Copyright (c) 2006-2009 Erin Catto http://www.box2d.org
*
* 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>
/// 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
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