1/*
2* Copyright (c) 2006-2011 Erin Catto http://www.box2d.org
3*
4* This software is provided 'as-is', without any express or implied
5* warranty. In no event will the authors be held liable for any damages
6* arising from the use of this software.
7* Permission is granted to anyone to use this software for any purpose,
8* including commercial applications, and to alter it and redistribute it
9* freely, subject to the following restrictions:
10* 1. The origin of this software must not be misrepresented; you must not
11* claim that you wrote the original software. If you use this software
12* in a product, an acknowledgment in the product documentation would be
13* appreciated but is not required.
14* 2. Altered source versions must be plainly marked as such, and must not be
15* misrepresented as being the original software.
16* 3. This notice may not be removed or altered from any source distribution.
17*/
18
19#ifndef B2_TIME_STEP_H
20#define B2_TIME_STEP_H
21
22#include <Box2D/Common/b2Math.h>
23
24/// Profiling data. Times are in milliseconds.
25struct b2Profile
26{
27 float32 step;
28 float32 collide;
29 float32 solve;
30 float32 solveInit;
31 float32 solveVelocity;
32 float32 solvePosition;
33 float32 broadphase;
34 float32 solveTOI;
35};
36
37/// This is an internal structure.
38struct b2TimeStep
39{
40 float32 dt; // time step
41 float32 inv_dt; // inverse time step (0 if dt == 0).
42 float32 dtRatio; // dt * inv_dt0
43 int32 velocityIterations;
44 int32 positionIterations;
45 bool warmStarting;
46};
47
48/// This is an internal structure.
49struct b2Position
50{
51 b2Vec2 c;
52 float32 a;
53};
54
55/// This is an internal structure.
56struct b2Velocity
57{
58 b2Vec2 v;
59 float32 w;
60};
61
62/// Solver Data
63struct b2SolverData
64{
65 b2TimeStep step;
66 b2Position* positions;
67 b2Velocity* velocities;
68};
69
70#endif
71