5 const matrix4x4_t identitymatrix =
15 void Matrix4x4_Copy (matrix4x4_t *out, const matrix4x4_t *in)
20 void Matrix4x4_CopyRotateOnly (matrix4x4_t *out, const matrix4x4_t *in)
22 out->m[0][0] = in->m[0][0];
23 out->m[0][1] = in->m[0][1];
24 out->m[0][2] = in->m[0][2];
26 out->m[1][0] = in->m[1][0];
27 out->m[1][1] = in->m[1][1];
28 out->m[1][2] = in->m[1][2];
30 out->m[2][0] = in->m[2][0];
31 out->m[2][1] = in->m[2][1];
32 out->m[2][2] = in->m[2][2];
40 void Matrix4x4_CopyTranslateOnly (matrix4x4_t *out, const matrix4x4_t *in)
45 out->m[0][3] = in->m[0][3];
49 out->m[1][3] = in->m[1][3];
53 out->m[2][3] = in->m[2][3];
60 void Matrix4x4_Concat (matrix4x4_t *out, const matrix4x4_t *in1, const matrix4x4_t *in2)
62 out->m[0][0] = in1->m[0][0] * in2->m[0][0] + in1->m[0][1] * in2->m[1][0] + in1->m[0][2] * in2->m[2][0] + in1->m[0][3] * in2->m[3][0];
63 out->m[0][1] = in1->m[0][0] * in2->m[0][1] + in1->m[0][1] * in2->m[1][1] + in1->m[0][2] * in2->m[2][1] + in1->m[0][3] * in2->m[3][1];
64 out->m[0][2] = in1->m[0][0] * in2->m[0][2] + in1->m[0][1] * in2->m[1][2] + in1->m[0][2] * in2->m[2][2] + in1->m[0][3] * in2->m[3][2];
65 out->m[0][3] = in1->m[0][0] * in2->m[0][3] + in1->m[0][1] * in2->m[1][3] + in1->m[0][2] * in2->m[2][3] + in1->m[0][3] * in2->m[3][3];
66 out->m[1][0] = in1->m[1][0] * in2->m[0][0] + in1->m[1][1] * in2->m[1][0] + in1->m[1][2] * in2->m[2][0] + in1->m[1][3] * in2->m[3][0];
67 out->m[1][1] = in1->m[1][0] * in2->m[0][1] + in1->m[1][1] * in2->m[1][1] + in1->m[1][2] * in2->m[2][1] + in1->m[1][3] * in2->m[3][1];
68 out->m[1][2] = in1->m[1][0] * in2->m[0][2] + in1->m[1][1] * in2->m[1][2] + in1->m[1][2] * in2->m[2][2] + in1->m[1][3] * in2->m[3][2];
69 out->m[1][3] = in1->m[1][0] * in2->m[0][3] + in1->m[1][1] * in2->m[1][3] + in1->m[1][2] * in2->m[2][3] + in1->m[1][3] * in2->m[3][3];
70 out->m[2][0] = in1->m[2][0] * in2->m[0][0] + in1->m[2][1] * in2->m[1][0] + in1->m[2][2] * in2->m[2][0] + in1->m[2][3] * in2->m[3][0];
71 out->m[2][1] = in1->m[2][0] * in2->m[0][1] + in1->m[2][1] * in2->m[1][1] + in1->m[2][2] * in2->m[2][1] + in1->m[2][3] * in2->m[3][1];
72 out->m[2][2] = in1->m[2][0] * in2->m[0][2] + in1->m[2][1] * in2->m[1][2] + in1->m[2][2] * in2->m[2][2] + in1->m[2][3] * in2->m[3][2];
73 out->m[2][3] = in1->m[2][0] * in2->m[0][3] + in1->m[2][1] * in2->m[1][3] + in1->m[2][2] * in2->m[2][3] + in1->m[2][3] * in2->m[3][3];
74 out->m[3][0] = in1->m[3][0] * in2->m[0][0] + in1->m[3][1] * in2->m[1][0] + in1->m[3][2] * in2->m[2][0] + in1->m[3][3] * in2->m[3][0];
75 out->m[3][1] = in1->m[3][0] * in2->m[0][1] + in1->m[3][1] * in2->m[1][1] + in1->m[3][2] * in2->m[2][1] + in1->m[3][3] * in2->m[3][1];
76 out->m[3][2] = in1->m[3][0] * in2->m[0][2] + in1->m[3][1] * in2->m[1][2] + in1->m[3][2] * in2->m[2][2] + in1->m[3][3] * in2->m[3][2];
77 out->m[3][3] = in1->m[3][0] * in2->m[0][3] + in1->m[3][1] * in2->m[1][3] + in1->m[3][2] * in2->m[2][3] + in1->m[3][3] * in2->m[3][3];
80 void Matrix4x4_Transpose (matrix4x4_t *out, const matrix4x4_t *in1)
82 out->m[0][0] = in1->m[0][0];
83 out->m[0][1] = in1->m[1][0];
84 out->m[0][2] = in1->m[2][0];
85 out->m[0][3] = in1->m[3][0];
86 out->m[1][0] = in1->m[0][1];
87 out->m[1][1] = in1->m[1][1];
88 out->m[1][2] = in1->m[2][1];
89 out->m[1][3] = in1->m[3][1];
90 out->m[2][0] = in1->m[0][2];
91 out->m[2][1] = in1->m[1][2];
92 out->m[2][2] = in1->m[2][2];
93 out->m[2][3] = in1->m[3][2];
94 out->m[3][0] = in1->m[0][3];
95 out->m[3][1] = in1->m[1][3];
96 out->m[3][2] = in1->m[2][3];
97 out->m[3][3] = in1->m[3][3];
100 void Matrix4x4_Transpose3x3 (matrix4x4_t *out, const matrix4x4_t *in1)
102 out->m[0][0] = in1->m[0][0];
103 out->m[0][1] = in1->m[1][0];
104 out->m[0][2] = in1->m[2][0];
105 out->m[1][0] = in1->m[0][1];
106 out->m[1][1] = in1->m[1][1];
107 out->m[1][2] = in1->m[2][1];
108 out->m[2][0] = in1->m[0][2];
109 out->m[2][1] = in1->m[1][2];
110 out->m[2][2] = in1->m[2][2];
112 out->m[0][3] = in1->m[0][3];
113 out->m[1][3] = in1->m[1][3];
114 out->m[2][3] = in1->m[2][3];
115 out->m[3][0] = in1->m[0][3];
116 out->m[3][1] = in1->m[1][3];
117 out->m[3][2] = in1->m[2][3];
118 out->m[3][3] = in1->m[3][3];
121 void Matrix4x4_Invert_Simple (matrix4x4_t *out, const matrix4x4_t *in1)
123 // we only support uniform scaling, so assume the first row is enough
124 // (note the lack of sqrt here, because we're trying to undo the scaling,
125 // this means multiplying by the inverse scale twice - squaring it, which
126 // makes the sqrt a waste of time)
128 double scale = 1.0 / (in1->m[0][0] * in1->m[0][0] + in1->m[0][1] * in1->m[0][1] + in1->m[0][2] * in1->m[0][2]);
130 double scale = 3.0 / sqrt
131 (in1->m[0][0] * in1->m[0][0] + in1->m[0][1] * in1->m[0][1] + in1->m[0][2] * in1->m[0][2]
132 + in1->m[1][0] * in1->m[1][0] + in1->m[1][1] * in1->m[1][1] + in1->m[1][2] * in1->m[1][2]
133 + in1->m[2][0] * in1->m[2][0] + in1->m[2][1] * in1->m[2][1] + in1->m[2][2] * in1->m[2][2]);
137 // invert the rotation by transposing and multiplying by the squared
138 // recipricol of the input matrix scale as described above
139 out->m[0][0] = (float)(in1->m[0][0] * scale);
140 out->m[0][1] = (float)(in1->m[1][0] * scale);
141 out->m[0][2] = (float)(in1->m[2][0] * scale);
142 out->m[1][0] = (float)(in1->m[0][1] * scale);
143 out->m[1][1] = (float)(in1->m[1][1] * scale);
144 out->m[1][2] = (float)(in1->m[2][1] * scale);
145 out->m[2][0] = (float)(in1->m[0][2] * scale);
146 out->m[2][1] = (float)(in1->m[1][2] * scale);
147 out->m[2][2] = (float)(in1->m[2][2] * scale);
149 // invert the translate
150 out->m[0][3] = -(in1->m[0][3] * out->m[0][0] + in1->m[1][3] * out->m[0][1] + in1->m[2][3] * out->m[0][2]);
151 out->m[1][3] = -(in1->m[0][3] * out->m[1][0] + in1->m[1][3] * out->m[1][1] + in1->m[2][3] * out->m[1][2]);
152 out->m[2][3] = -(in1->m[0][3] * out->m[2][0] + in1->m[1][3] * out->m[2][1] + in1->m[2][3] * out->m[2][2]);
154 // don't know if there's anything worth doing here
161 void Matrix4x4_Normalize (matrix4x4_t *out, matrix4x4_t *in1)
163 // scale rotation matrix vectors to a length of 1
164 // note: this is only designed to undo uniform scaling
165 double scale = 1.0 / sqrt(in1->m[0][0] * in1->m[0][0] + in1->m[0][1] * in1->m[0][1] + in1->m[0][2] * in1->m[0][2]);
166 out->m[0][0] = (float)(in1->m[0][0] * scale);
167 out->m[0][1] = (float)(in1->m[0][1] * scale);
168 out->m[0][2] = (float)(in1->m[0][2] * scale);
169 out->m[0][3] = (float)(in1->m[0][3]);
170 out->m[1][0] = (float)(in1->m[1][0] * scale);
171 out->m[1][1] = (float)(in1->m[1][1] * scale);
172 out->m[1][2] = (float)(in1->m[1][2] * scale);
173 out->m[1][3] = (float)(in1->m[1][3]);
174 out->m[2][0] = (float)(in1->m[2][0] * scale);
175 out->m[2][1] = (float)(in1->m[2][1] * scale);
176 out->m[2][2] = (float)(in1->m[2][2] * scale);
177 out->m[2][3] = (float)(in1->m[2][3]);
184 void Matrix4x4_CreateIdentity (matrix4x4_t *out)
204 void Matrix4x4_CreateTranslate (matrix4x4_t *out, float x, float y, float z)
224 void Matrix4x4_CreateRotate (matrix4x4_t *out, float angle, float x, float y, float z)
230 len = 1.0f / (float)sqrt(len);
235 angle *= (float)(-M_PI / 180.0);
236 c = (float)cos(angle);
237 s = (float)sin(angle);
239 out->m[0][0]=x * x + c * (1 - x * x);
240 out->m[0][1]=x * y * (1 - c) + z * s;
241 out->m[0][2]=z * x * (1 - c) - y * s;
243 out->m[1][0]=x * y * (1 - c) - z * s;
244 out->m[1][1]=y * y + c * (1 - y * y);
245 out->m[1][2]=y * z * (1 - c) + x * s;
247 out->m[2][0]=z * x * (1 - c) + y * s;
248 out->m[2][1]=y * z * (1 - c) - x * s;
249 out->m[2][2]=z * z + c * (1 - z * z);
257 void Matrix4x4_CreateScale (matrix4x4_t *out, float x)
277 void Matrix4x4_CreateScale3 (matrix4x4_t *out, float x, float y, float z)
297 void Matrix4x4_CreateFromQuakeEntity(matrix4x4_t *out, float x, float y, float z, float pitch, float yaw, float roll, float scale)
299 double angle, sr, sp, sy, cr, cp, cy;
303 angle = yaw * (M_PI*2 / 360);
306 angle = pitch * (M_PI*2 / 360);
309 angle = roll * (M_PI*2 / 360);
312 out->m[0][0] = (float)((cp*cy) * scale);
313 out->m[0][1] = (float)((sr*sp*cy+cr*-sy) * scale);
314 out->m[0][2] = (float)((cr*sp*cy+-sr*-sy) * scale);
316 out->m[1][0] = (float)((cp*sy) * scale);
317 out->m[1][1] = (float)((sr*sp*sy+cr*cy) * scale);
318 out->m[1][2] = (float)((cr*sp*sy+-sr*cy) * scale);
320 out->m[2][0] = (float)((-sp) * scale);
321 out->m[2][1] = (float)((sr*cp) * scale);
322 out->m[2][2] = (float)((cr*cp) * scale);
331 angle = yaw * (M_PI*2 / 360);
334 angle = pitch * (M_PI*2 / 360);
337 out->m[0][0] = (float)((cp*cy) * scale);
338 out->m[0][1] = (float)((-sy) * scale);
339 out->m[0][2] = (float)((sp*cy) * scale);
341 out->m[1][0] = (float)((cp*sy) * scale);
342 out->m[1][1] = (float)((cy) * scale);
343 out->m[1][2] = (float)((sp*sy) * scale);
345 out->m[2][0] = (float)((-sp) * scale);
347 out->m[2][2] = (float)((cp) * scale);
356 angle = yaw * (M_PI*2 / 360);
359 out->m[0][0] = (float)((cy) * scale);
360 out->m[0][1] = (float)((-sy) * scale);
363 out->m[1][0] = (float)((sy) * scale);
364 out->m[1][1] = (float)((cy) * scale);
369 out->m[2][2] = scale;
378 out->m[0][0] = scale;
383 out->m[1][1] = scale;
388 out->m[2][2] = scale;
397 void Matrix4x4_ToVectors(const matrix4x4_t *in, float vx[3], float vy[3], float vz[3], float t[3])
413 void Matrix4x4_FromVectors(matrix4x4_t *out, const float vx[3], const float vy[3], const float vz[3], const float t[3])
415 out->m[0][0] = vx[0];
416 out->m[0][1] = vy[0];
417 out->m[0][2] = vz[0];
419 out->m[1][0] = vx[1];
420 out->m[1][1] = vy[1];
421 out->m[1][2] = vz[1];
423 out->m[2][0] = vx[2];
424 out->m[2][1] = vy[2];
425 out->m[2][2] = vz[2];
433 void Matrix4x4_Blend (matrix4x4_t *out, const matrix4x4_t *in1, const matrix4x4_t *in2, float blend)
435 float iblend = 1 - blend;
436 out->m[0][0] = in1->m[0][0] * iblend + in2->m[0][0] * blend;
437 out->m[0][1] = in1->m[0][1] * iblend + in2->m[0][1] * blend;
438 out->m[0][2] = in1->m[0][2] * iblend + in2->m[0][2] * blend;
439 out->m[0][3] = in1->m[0][3] * iblend + in2->m[0][3] * blend;
440 out->m[1][0] = in1->m[1][0] * iblend + in2->m[1][0] * blend;
441 out->m[1][1] = in1->m[1][1] * iblend + in2->m[1][1] * blend;
442 out->m[1][2] = in1->m[1][2] * iblend + in2->m[1][2] * blend;
443 out->m[1][3] = in1->m[1][3] * iblend + in2->m[1][3] * blend;
444 out->m[2][0] = in1->m[2][0] * iblend + in2->m[2][0] * blend;
445 out->m[2][1] = in1->m[2][1] * iblend + in2->m[2][1] * blend;
446 out->m[2][2] = in1->m[2][2] * iblend + in2->m[2][2] * blend;
447 out->m[2][3] = in1->m[2][3] * iblend + in2->m[2][3] * blend;
448 out->m[3][0] = in1->m[3][0] * iblend + in2->m[3][0] * blend;
449 out->m[3][1] = in1->m[3][1] * iblend + in2->m[3][1] * blend;
450 out->m[3][2] = in1->m[3][2] * iblend + in2->m[3][2] * blend;
451 out->m[3][3] = in1->m[3][3] * iblend + in2->m[3][3] * blend;
455 void Matrix4x4_Transform (const matrix4x4_t *in, const float v[3], float out[3])
457 out[0] = v[0] * in->m[0][0] + v[1] * in->m[0][1] + v[2] * in->m[0][2] + in->m[0][3];
458 out[1] = v[0] * in->m[1][0] + v[1] * in->m[1][1] + v[2] * in->m[1][2] + in->m[1][3];
459 out[2] = v[0] * in->m[2][0] + v[1] * in->m[2][1] + v[2] * in->m[2][2] + in->m[2][3];
462 void Matrix4x4_Transform4 (const matrix4x4_t *in, const float v[4], float out[4])
464 out[0] = v[0] * in->m[0][0] + v[1] * in->m[0][1] + v[2] * in->m[0][2] + v[3] * in->m[0][3];
465 out[1] = v[0] * in->m[1][0] + v[1] * in->m[1][1] + v[2] * in->m[1][2] + v[3] * in->m[1][3];
466 out[2] = v[0] * in->m[2][0] + v[1] * in->m[2][1] + v[2] * in->m[2][2] + v[3] * in->m[2][3];
467 out[3] = v[0] * in->m[3][0] + v[1] * in->m[3][1] + v[2] * in->m[3][2] + v[3] * in->m[3][3];
470 void Matrix4x4_Transform3x3 (const matrix4x4_t *in, const float v[3], float out[3])
472 out[0] = v[0] * in->m[0][0] + v[1] * in->m[0][1] + v[2] * in->m[0][2];
473 out[1] = v[0] * in->m[1][0] + v[1] * in->m[1][1] + v[2] * in->m[1][2];
474 out[2] = v[0] * in->m[2][0] + v[1] * in->m[2][1] + v[2] * in->m[2][2];
478 void Matrix4x4_SimpleUntransform (const matrix4x4_t *in, const float v[3], float out[3])
481 t[0] = v[0] - in->m[0][3];
482 t[1] = v[1] - in->m[1][3];
483 t[2] = v[2] - in->m[2][3];
484 out[0] = t[0] * in->m[0][0] + t[1] * in->m[1][0] + t[2] * in->m[2][0];
485 out[1] = t[0] * in->m[0][1] + t[1] * in->m[1][1] + t[2] * in->m[2][1];
486 out[2] = t[0] * in->m[0][2] + t[1] * in->m[1][2] + t[2] * in->m[2][2];
491 void Matrix4x4_ConcatTranslate (matrix4x4_t *out, float x, float y, float z)
493 matrix4x4_t base, temp;
495 Matrix4x4_CreateTranslate(&temp, x, y, z);
496 Matrix4x4_Concat(out, &base, &temp);
500 void Matrix4x4_ConcatRotate (matrix4x4_t *out, float angle, float x, float y, float z)
502 matrix4x4_t base, temp;
504 Matrix4x4_CreateRotate(&temp, angle, x, y, z);
505 Matrix4x4_Concat(out, &base, &temp);
509 void Matrix4x4_ConcatScale (matrix4x4_t *out, float x)
511 matrix4x4_t base, temp;
513 Matrix4x4_CreateScale(&temp, x);
514 Matrix4x4_Concat(out, &base, &temp);
518 void Matrix4x4_ConcatScale3 (matrix4x4_t *out, float x, float y, float z)
520 matrix4x4_t base, temp;
522 Matrix4x4_CreateScale3(&temp, x, y, z);
523 Matrix4x4_Concat(out, &base, &temp);
526 void Matrix4x4_OriginFromMatrix (const matrix4x4_t *in, float *out)
528 out[0] = in->m[0][3];
529 out[1] = in->m[1][3];
530 out[2] = in->m[2][3];
533 float Matrix4x4_ScaleFromMatrix (const matrix4x4_t *in)
535 // we only support uniform scaling, so assume the first row is enough
536 return (float)sqrt(in->m[0][0] * in->m[0][0] + in->m[0][1] * in->m[0][1] + in->m[0][2] * in->m[0][2]);