00001 /* 00002 * Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com 00003 * 00004 * This software is provided 'as-is', without any express or implied 00005 * warranty. In no event will the authors be held liable for any damages 00006 * arising from the use of this software. 00007 * Permission is granted to anyone to use this software for any purpose, 00008 * including commercial applications, and to alter it and redistribute it 00009 * freely, subject to the following restrictions: 00010 * 1. The origin of this software must not be misrepresented; you must not 00011 * claim that you wrote the original software. If you use this software 00012 * in a product, an acknowledgment in the product documentation would be 00013 * appreciated but is not required. 00014 * 2. Altered source versions must be plainly marked as such, and must not be 00015 * misrepresented as being the original software. 00016 * 3. This notice may not be removed or altered from any source distribution. 00017 */ 00018 00019 #ifndef B2_TIME_STEP_H 00020 #define B2_TIME_STEP_H 00021 00022 #include <Box2D/Common/b2Settings.h> 00023 00025 struct b2TimeStep 00026 { 00027 float32 dt; // time step 00028 float32 inv_dt; // inverse time step (0 if dt == 0). 00029 float32 dtRatio; // dt * inv_dt0 00030 int32 velocityIterations; 00031 int32 positionIterations; 00032 bool warmStarting; 00033 }; 00034 00035 #endif