59 lines
1.9 KiB
C
59 lines
1.9 KiB
C
|
/*
|
||
|
|
* 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 "../Common/b2Math.h"
|
||
|
|
#include "../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
|