b2_time_of_impact.h

// MIT License
 
// Copyright (c) 2019 Erin Catto
 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
 
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
 
#ifndef B2_TIME_OF_IMPACT_H
#define B2_TIME_OF_IMPACT_H
 
#include "b2_api.h"
#include "b2_math.h"
#include "b2_distance.h"
 
struct B2_API b2TOIInput
{
    b2DistanceProxy proxyA;
    b2DistanceProxy proxyB;
    b2Sweep sweepA;
    b2Sweep sweepB;
    float tMax;     // defines sweep interval [0, tMax]
};
 
struct B2_API b2TOIOutput
{
    enum State
    {
        e_unknown,
        e_failed,
        e_overlapped,
        e_touching,
        e_separated
    };
 
    State state;
    float t;
};
 
B2_API void b2TimeOfImpact(b2TOIOutput* output, const b2TOIInput* input);
 
#endif