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comparison trunk/tests/ChipmunkDemos/samples/Query.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.Query;
5
6 import chipmunkd.chipmunk;
7
8 import samples.ChipmunkDemo;
9 import gameApp;
10
11 import std.math;
12
13 //extern cpVect mousePos;
14
15 static cpSpace *space;
16
17 static cpShape *querySeg = null;
18
19
20 static void
21 update(int ticks)
22 {
23 //messageString[0] = '\0';
24
25 cpVect start = cpvzero;
26 cpVect end = /*cpv(0, 85);//*/mousePos;
27 cpVect lineEnd = end;
28
29 //{
30 // char infoString[1024];
31 // sprintf(infoString, "Query: Dist(%f) Point%s, ", cpvdist(start, end), cpvstr(end));
32 // strcat(messageString, infoString);
33 //}
34
35 cpSegmentQueryInfo info = {};
36 if(cpSpaceSegmentQueryFirst(space, start, end, CP_ALL_LAYERS, CP_NO_GROUP, &info)){
37 cpVect point = cpSegmentQueryHitPoint(start, end, info);
38 lineEnd = cpvadd(point, cpvzero);//cpvmult(info.n, 4.0f));
39
40 //char infoString[1024];
41 //sprintf(infoString, "Segment Query: Dist(%f) Normal%s", cpSegmentQueryHitDist(start, end, info), cpvstr(info.n));
42 //strcat(messageString, infoString);
43 } else {
44 //strcat(messageString, "Segment Query (None)");
45 }
46
47 cpSegmentShapeSetEndpoints(querySeg, start, lineEnd);
48 cpShapeCacheBB(querySeg); // force it to update it's collision detection data so it will draw
49
50 // normal other stuff.
51 int steps = 1;
52 cpFloat dt = 1.0f/60.0f/cast(cpFloat)steps;
53
54 for(int i=0; i<steps; i++){
55 cpSpaceStep(space, dt);
56 }
57 }
58
59 static cpSpace *
60 init()
61 {
62 cpResetShapeIdCounter();
63
64 space = cpSpaceNew();
65 space.elasticIterations = 0;
66 space.iterations = 5;
67
68 cpSpaceResizeStaticHash(space, 40.0f, 999);
69 cpSpaceResizeActiveHash(space, 30.0f, 2999);
70
71 cpBody *staticBody = &space.staticBody;
72 cpShape *shape;
73
74 // add a non-collidable segment as a quick and dirty way to draw the query line
75 shape = cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpvzero, cpv(100.0f, 0.0f), 4.0f));
76 shape.layers = 0;
77 querySeg = shape;
78
79 { // add a fat segment
80 cpFloat mass = 1.0f;
81 cpFloat length = 100.0f;
82 cpVect a = cpv(-length/2.0f, 0.0f), b = cpv(length/2.0f, 0.0f);
83
84 cpBody *_body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForSegment(mass, a, b)));
85 _body.p = cpv(0.0f, 100.0f);
86
87 cpSpaceAddShape(space, cpSegmentShapeNew(_body, a, b, 20.0f));
88 }
89
90 { // add a static segment
91 cpSpaceAddShape(space, cpSegmentShapeNew(staticBody, cpv(0, 300), cpv(300, 0), 0.0f));
92 }
93
94 { // add a pentagon
95 cpFloat mass = 1.0f;
96 const int NUM_VERTS = 5;
97
98 cpVect verts[NUM_VERTS];
99 for(int i=0; i<NUM_VERTS; i++){
100 cpFloat angle = -2*PI*i/(cast(cpFloat) NUM_VERTS);
101 verts[i] = cpv(30*cos(angle), 30*sin(angle));
102 }
103
104 cpBody *_body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForPoly(mass, NUM_VERTS, verts.ptr, cpvzero)));
105 _body.p = cpv(50.0f, 50.0f);
106
107 cpSpaceAddShape(space, cpPolyShapeNew(_body, NUM_VERTS, verts.ptr, cpvzero));
108 }
109
110 { // add a circle
111 cpFloat mass = 1.0f;
112 cpFloat r = 20.0f;
113
114 cpBody *_body = cpSpaceAddBody(space, cpBodyNew(mass, cpMomentForCircle(mass, 0.0f, r, cpvzero)));
115 _body.p = cpv(100.0f, 100.0f);
116
117 cpSpaceAddShape(space, cpCircleShapeNew(_body, r, cpvzero));
118 }
119
120 return space;
121 }
122
123 static void
124 destroy()
125 {
126 cpSpaceFreeChildren(space);
127 cpSpaceFree(space);
128 }
129
130 chipmunkDemo Query = {
131 "Segment Query",
132 null,
133 &init,
134 &update,
135 &destroy,
136 };