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0001 /*
0002 * Copyright (c) 2006-2009 Erin Catto http://www.gphysics.com
0003 *
0004 * This software is provided 'as-is', without any express or implied
0005 * warranty.  In no event will the authors be held liable for any damages
0006 * arising from the use of this software.
0007 * Permission is granted to anyone to use this software for any purpose,
0008 * including commercial applications, and to alter it and redistribute it
0009 * freely, subject to the following restrictions:
0010 * 1. The origin of this software must not be misrepresented; you must not
0011 * claim that you wrote the original software. If you use this software
0012 * in a product, an acknowledgment in the product documentation would be
0013 * appreciated but is not required.
0014 * 2. Altered source versions must be plainly marked as such, and must not be
0015 * misrepresented as being the original software.
0016 * 3. This notice may not be removed or altered from any source distribution.
0017 */
0018 
0019 #ifndef B2_TIME_STEP_H
0020 #define B2_TIME_STEP_H
0021 
0022 #include <Box2D/Common/b2Settings.h>
0023 
0024 /// This is an internal structure.
0025 struct b2TimeStep
0026 {
0027     qreal dt;           // time step
0028     qreal inv_dt;       // inverse time step (0 if dt == 0).
0029     qreal dtRatio;  // dt * inv_dt0
0030     int32 velocityIterations;
0031     int32 positionIterations;
0032     bool warmStarting;
0033 };
0034 
0035 #endif