mirror of https://github.com/axmolengine/axmol.git
64 lines
2.0 KiB
C
64 lines
2.0 KiB
C
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// MIT License
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// Copyright (c) 2019 Erin Catto
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#ifndef B2_TIME_OF_IMPACT_H
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#define B2_TIME_OF_IMPACT_H
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#include "b2_api.h"
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#include "b2_math.h"
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#include "b2_distance.h"
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/// Input parameters for b2TimeOfImpact
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struct B2_API b2TOIInput
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{
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b2DistanceProxy proxyA;
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b2DistanceProxy proxyB;
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b2Sweep sweepA;
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b2Sweep sweepB;
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float tMax; // defines sweep interval [0, tMax]
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};
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/// Output parameters for b2TimeOfImpact.
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struct B2_API b2TOIOutput
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{
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enum State
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{
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e_unknown,
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e_failed,
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e_overlapped,
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e_touching,
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e_separated
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};
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State state;
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float t;
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};
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/// Compute the upper bound on time before two shapes penetrate. Time is represented as
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/// a fraction between [0,tMax]. This uses a swept separating axis and may miss some intermediate,
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/// non-tunneling collisions. If you change the time interval, you should call this function
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/// again.
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/// Note: use b2Distance to compute the contact point and normal at the time of impact.
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B2_API void b2TimeOfImpact(b2TOIOutput* output, const b2TOIInput* input);
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#endif
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