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comparison trunk/tests/ChipmunkDemos/samples/Bounce.d @ 16:af2f61a96318

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ported chipmunk demos
author Extrawurst
date Sat, 04 Dec 2010 02:02:29 +0100
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15:df4ebc8add66 16:af2f61a96318
1
2 // written in the D programming language
3
4 module samples.Bounce;
5
6 import chipmunkd.chipmunk;
7
8 import samples.ChipmunkDemo;
9
10 static cpSpace *space;
11
12 static void
13 update(int ticks)
14 {
15 enum int steps = 3;
16 enum cpFloat dt = 1.0f/60.0f/cast(cpFloat)steps;
17
18 for(int i=0; i<steps; i++){
19 cpSpaceStep(space, dt);
20 }
21 }
22
23 static void
24 add_box()
25 {
26 enum cpFloat size = 10.0f;
27 enum cpFloat mass = 1.0f;
28
29 cpVect verts[] = [
30 cpv(-size,-size),
31 cpv(-size, size),
32 cpv( size, size),
33 cpv( size,-size),
34 ];
35
36 cpFloat radius = cpvlength(cpv(size, size));
37
38 cpBody *_body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForPoly(mass, 4, verts.ptr, cpvzero)));
39 _body.p = cpv(frand()*(640 - 2*radius) - (320 - radius), frand()*(480 - 2*radius) - (240 - radius));
40 _body.v = cpvmult(cpv(2*frand() - 1, 2*frand() - 1), 200);
41
42 cpShape *shape = cpSpaceAddShape(space, cpPolyShapeNew(_body, 4, verts.ptr, cpvzero));
43 shape.e = 1.0f; shape.u = 0.0f;
44 }
45
46 static cpSpace *
47 init()
48 {
49 cpResetShapeIdCounter();
50
51 space = cpSpaceNew();
52 cpSpaceResizeActiveHash(space, 30.0f, 1000);
53 space.iterations = 10;
54
55 cpBody *_body;
56 cpBody *staticBody = &space.staticBody;
57 cpShape *shape;
58
59 // Create segments around the edge of the screen.
60 shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(-320,240), 0.0f));
61 shape.e = 1.0f; shape.u = 1.0f;
62 shape.layers = NOT_GRABABLE_MASK;
63
64 shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(320,-240), cpv(320,240), 0.0f));
65 shape.e = 1.0f; shape.u = 1.0f;
66 shape.layers = NOT_GRABABLE_MASK;
67
68 shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(-320,-240), cpv(320,-240), 0.0f));
69 shape.e = 1.0f; shape.u = 1.0f;
70 shape.layers = NOT_GRABABLE_MASK;
71
72 shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(-320,240), cpv(320,240), 0.0f));
73 shape.e = 1.0f; shape.u = 1.0f;
74 shape.layers = NOT_GRABABLE_MASK;
75
76 for(int i=0; i<10; i++)
77 add_box();
78
79 _body = cpSpaceAddBody(space, cpBodyNew(100.0f, 10000.0f));
80
81 shape = cpSpaceAddShape(space, cpSegmentShapeNew(_body, cpv(-75,0), cpv(75,0), 5.0f));
82 shape.e = 1.0f; shape.u = 1.0f;
83
84 cpSpaceAddConstraint(space, cpPivotJointNew2(_body, staticBody, cpvzero, cpvzero));
85
86 return space;
87 }
88
89 static void
90 destroy()
91 {
92 cpSpaceFreeChildren(space);
93 cpSpaceFree(space);
94 }
95
96 chipmunkDemo Bounce = {
97 "Bounce",
98 null,
99 &init,
100 &update,
101 &destroy,
102 };