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authorchai <chaifix@163.com>2020-09-10 20:30:31 +0800
committerchai <chaifix@163.com>2020-09-10 20:30:31 +0800
commit639b34294ffc20721c66db46e59e07d9100ac4b8 (patch)
tree7e1d45b536fa35e9f1559e468ea66fca99524573 /ThirdParty/Box2D/Dynamics/b2TimeStep.h
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+/*
+* Copyright (c) 2006-2011 Erin Catto http://www.box2d.org
+*
+* 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/b2Math.h"
+
+/// Profiling data. Times are in milliseconds.
+struct b2Profile
+{
+ float32 step;
+ float32 collide;
+ float32 solve;
+ float32 solveInit;
+ float32 solveVelocity;
+ float32 solvePosition;
+ float32 broadphase;
+ float32 solveTOI;
+};
+
+/// 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;
+};
+
+/// This is an internal structure.
+struct b2Position
+{
+ b2Vec2 c;
+ float32 a;
+};
+
+/// This is an internal structure.
+struct b2Velocity
+{
+ b2Vec2 v;
+ float32 w;
+};
+
+/// Solver Data
+struct b2SolverData
+{
+ b2TimeStep step;
+ b2Position* positions;
+ b2Velocity* velocities;
+};
+
+#endif