Box2D 2.3.0 A 2D Physics Engine for Games

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b2TimeStep.h
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
25 struct 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
38 struct 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
49 struct b2Position
50 {
51 b2Vec2 c;
52 float32 a;
53 };
54
56 struct b2Velocity
57 {
58 b2Vec2 v;
59 float32 w;
60 };
61
63 struct b2SolverData
64 {
65 b2TimeStep step;
66 b2Position* positions;
67 b2Velocity* velocities;
68 };
69
70 #endif
b2Profile
Profiling data. Times are in milliseconds.
Definition: b2TimeStep.h:25
b2Position
This is an internal structure.
Definition: b2TimeStep.h:49
b2SolverData
Solver Data.
Definition: b2TimeStep.h:63
b2TimeStep
This is an internal structure.
Definition: b2TimeStep.h:38
b2Velocity
This is an internal structure.
Definition: b2TimeStep.h:56
b2Vec2
A 2D column vector.
Definition: b2Math.h:53