b2TimeStep.h
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上传日期:2022-01-07
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- /*
- * 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_STEP_H
- #define B2_TIME_STEP_H
- #include <Box2D/Common/b2Settings.h>
- /// This is an internal structure.
struct b2TimeStep
{
float32 dt; // time step
float32 inv_dt; // inverse time step (0 if dt == 0).
float32 dtRatio; // dt * inv_dt0
int32 velocityIterations;
int32 positionIterations;
bool warmStarting;
};
- #endif