43 lines
951 B
C
43 lines
951 B
C
#include "libultra_internal.h"
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void guRotateF(float m[4][4], float a, float x, float y, float z) {
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float sin_a;
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float cos_a;
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float sp2c;
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float sp28;
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float sp24;
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float xx, yy, zz;
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static float D_80365D70 = GU_PI / 180;
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guNormalize(&x, &y, &z);
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a = a * D_80365D70;
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sin_a = sinf(a);
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cos_a = cosf(a);
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sp2c = x * y * (1 - cos_a);
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sp28 = y * z * (1 - cos_a);
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sp24 = z * x * (1 - cos_a);
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guMtxIdentF(m);
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xx = x * x;
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m[0][0] = (1 - xx) * cos_a + xx;
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m[2][1] = sp28 - x * sin_a;
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m[1][2] = sp28 + x * sin_a;
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yy = y * y;
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m[1][1] = (1 - yy) * cos_a + yy;
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m[2][0] = sp24 + y * sin_a;
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m[0][2] = sp24 - y * sin_a;
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zz = z * z;
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m[2][2] = (1 - zz) * cos_a + zz;
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m[1][0] = sp2c - z * sin_a;
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m[0][1] = sp2c + z * sin_a;
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}
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void guRotate(Mtx *m, float a, float x, float y, float z) {
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float mf[4][4];
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guRotateF(mf, a, x, y, z);
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guMtxF2L(mf, m);
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}
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