1 /* Copyright (c) 2007 Scott Lembcke
2 *
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
9 *
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
12 *
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
19 * SOFTWARE.
20 */
21
22 #include "ChipmunkDebugDraw.h"
23
24 typedef struct ChipmunkDemo ChipmunkDemo;
25
26 typedef cpSpace *(*ChipmunkDemoInitFunc)(void);
27 typedef void (*ChipmunkDemoUpdateFunc)(cpSpace *space, double dt);
28 typedef void (*ChipmunkDemoDrawFunc)(cpSpace *space);
29 typedef void (*ChipmunkDemoDestroyFunc)(cpSpace *space);
30
31 struct ChipmunkDemo {
32 const char *name;
33 double timestep;
34
35 ChipmunkDemoInitFunc initFunc;
36 ChipmunkDemoUpdateFunc updateFunc;
37 ChipmunkDemoDrawFunc drawFunc;
38
39 ChipmunkDemoDestroyFunc destroyFunc;
40 };
41
42 static inline cpFloat
frand(void)43 frand(void)
44 {
45 return (cpFloat)rand()/(cpFloat)RAND_MAX;
46 }
47
48 static inline cpVect
frand_unit_circle()49 frand_unit_circle(){
50 cpVect v = cpv(frand()*2.0f - 1.0f, frand()*2.0f - 1.0f);
51 return (cpvlengthsq(v) < 1.0f ? v : frand_unit_circle());
52 }
53
54 extern int ChipmunkDemoTicks;
55 extern double ChipmunkDemoTime;
56 extern cpVect ChipmunkDemoKeyboard;
57 extern cpVect ChipmunkDemoMouse;
58 extern cpBool ChipmunkDemoRightClick;
59 extern cpBool ChipmunkDemoRightDown;
60
61 extern char const *ChipmunkDemoMessageString;
62 void ChipmunkDemoPrintString(char const *fmt, ...);
63
64 extern cpShapeFilter GRAB_FILTER;
65 extern cpShapeFilter NOT_GRABBABLE_FILTER;
66
67 void ChipmunkDemoDefaultDrawImpl(cpSpace *space);
68 void ChipmunkDemoFreeSpaceChildren(cpSpace *space);
69