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comparison trunk/chipmunkd/chipmunk.d @ 4:7ebbd4d05553

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initial commit
author Extrawurst
date Thu, 02 Dec 2010 02:11:26 +0100
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3:81145a61c2fe 4:7ebbd4d05553
1
2 // written in the D programming language
3
4 module chipmunkd.chipmunk;
5 //#ifndef CHIPMUNK_HEADER
6 //#define CHIPMUNK_HEADER
7 //
8 //#ifdef __cplusplus
9 //extern "C" {
10 //#endif
11 //
12 //void cpMessage(const char *message, const char *condition, const char *file, int line, int isError);
13 //#ifdef NDEBUG
14 // #define cpAssertWarn(condition, message)
15 //#else
16 // #define cpAssertWarn(condition, message) if(!(condition)) cpMessage(message, #condition, __FILE__, __LINE__, 0)
17 //#endif
18
19 debug
20 {
21 //TODO:
22 //void cpAssertWarn(bool condition, string message){if(condition) cpMessage(message,condition,__FILE__,__LINE__, 0);}
23 void cpAssertWarn(bool condition, string message){}
24 }
25 else
26 {
27 void cpAssertWarn(bool condition, string message){}
28 }
29
30 //
31 //#ifdef NDEBUG
32 // #define cpAssert(condition, message)
33 //#else
34 // #define cpAssert(condition, message) if(!(condition)) cpMessage(message, #condition, __FILE__, __LINE__, 1)
35 //#endif
36 //
37 import chipmunkd.chipmunk_types_h;
38 import core.stdc.stdlib;
39 //
40 //#ifndef INFINITY
41 // #ifdef _MSC_VER
42 // union MSVC_EVIL_FLOAT_HACK
43 // {
44 // unsigned __int8 Bytes[4];
45 // float Value;
46 // };
47 // static union MSVC_EVIL_FLOAT_HACK INFINITY_HACK = {{0x00, 0x00, 0x80, 0x7F}};
48 // #define INFINITY (INFINITY_HACK.Value)
49 // #endif
50 //
51 // #ifdef __GNUC__
52 // #define INFINITY (__builtin_inf())
53 // #endif
54 //
55 // #ifndef INFINITY
56 // #define INFINITY (1e1000)
57 // #endif
58 //#endif
59
60 enum INFINITY = cpFloat.infinity;
61
62 // Maximum allocated size for various Chipmunk buffer sizes
63 enum CP_BUFFER_BYTES = (32*1024);
64
65 alias core.stdc.stdlib.malloc cpmalloc;
66 alias core.stdc.stdlib.calloc cpcalloc;
67 alias core.stdc.stdlib.realloc cprealloc;
68 alias core.stdc.stdlib.free cpfree;
69
70 public import chipmunkd.cpVect_h,chipmunkd.cpVect;
71 public import chipmunkd.cpBB;
72 public import chipmunkd.cpArray;
73 public import chipmunkd.cpHashSet;
74 public import chipmunkd.cpSpaceHash;
75 //
76 public import chipmunkd.cpBody;
77 public import chipmunkd.cpShape;
78 public import chipmunkd.cpPolyShape;
79 //
80 public import chipmunkd.cpArbiter;
81 public import chipmunkd.cpCollision;
82 //
83 public import chipmunkd.constraints.cpConstraint;
84 //
85 public import chipmunkd.cpSpace;
86 public import chipmunkd.cpSpaceComponent;
87 public import chipmunkd.cpSpaceQuery;
88 public import chipmunkd.cpSpaceStep;
89
90 public import chipmunkd.chipmunk_types_h;
91
92 enum cpHashValue CP_HASH_COEF = cast(cpHashValue)(3344921057uL); // ulong to uint ??
93 static cpHashValue CP_HASH_PAIR(T)(T A, T B) {return (cast(cpHashValue)(A)*CP_HASH_COEF ^ cast(cpHashValue)(B)*CP_HASH_COEF);}
94
95 void
96 cpMessage(string message, string condition, string file, int line, int isError)
97 {
98 //TODO:
99 //fprintf(stderr, (isError ? "Aborting due to Chipmunk error: %s\n" : "Chipmunk warning: %s\n"), message);
100 //fprintf(stderr, "\tFailed condition: %s\n", condition);
101 //fprintf(stderr, "\tSource:%s:%d\n", file, line);
102
103 if(isError) abort();
104 }
105
106 extern const char *cpVersionString;
107 void cpInitChipmunk()
108 {
109 cpInitCollisionFuncs();
110 }
111
112 /**
113 Calculate the moment of inertia for a circle.
114 r1 and r2 are the inner and outer diameters. A solid circle has an inner diameter of 0.
115 */
116 cpFloat
117 cpMomentForCircle(cpFloat m, cpFloat r1, cpFloat r2, cpVect offset)
118 {
119 return (1.0f/2.0f)*m*(r1*r1 + r2*r2) + m*cpvdot(offset, offset);
120 }
121 /**
122 Calculate the moment of inertia for a line segment.
123 Beveling radius is not supported.
124 */
125 cpFloat
126 cpMomentForSegment(cpFloat m, cpVect a, cpVect b)
127 {
128 cpFloat length = cpvlength(cpvsub(b, a));
129 cpVect offset = cpvmult(cpvadd(a, b), 1.0f/2.0f);
130
131 return m*length*length/12.0f + m*cpvdot(offset, offset);
132 }
133
134 /**
135 Calculate the moment of inertia for a solid polygon shape.
136 */
137 cpFloat
138 cpMomentForPoly(cpFloat m, const int numVerts, cpVect *verts, cpVect offset)
139 {
140 cpVect *tVerts = cast(cpVect *)cpcalloc(numVerts, cpVect.sizeof);
141 for(int i=0; i<numVerts; i++)
142 tVerts[i] = cpvadd(verts[i], offset);
143
144 cpFloat sum1 = 0.0f;
145 cpFloat sum2 = 0.0f;
146 for(int i=0; i<numVerts; i++){
147 cpVect v1 = tVerts[i];
148 cpVect v2 = tVerts[(i+1)%numVerts];
149
150 cpFloat a = cpvcross(v2, v1);
151 cpFloat b = cpvdot(v1, v1) + cpvdot(v1, v2) + cpvdot(v2, v2);
152
153 sum1 += a*b;
154 sum2 += a;
155 }
156
157 cpfree(tVerts);
158 return (m*sum1)/(6.0f*sum2);
159 }
160
161 /**
162 Calculate the moment of inertia for a solid box.
163 */
164 cpFloat
165 cpMomentForBox(cpFloat m, cpFloat width, cpFloat height)
166 {
167 return m*(width*width + height*height)/12.0f;
168 }
169
170 //#ifdef __cplusplus
171 //}
172 //#endif
173 //
174 //#endif