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52 lines
933 B
C
52 lines
933 B
C
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#include "global.h"
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void guRotateF(f32 m[4][4], f32 a, f32 x, f32 y, f32 z) {
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static f32 D_80134D10 = M_PI / 180.0f;
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f32 sine;
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f32 cosine;
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f32 ab;
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f32 bc;
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f32 ca;
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f32 t;
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f32 xs;
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f32 ys;
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f32 zs;
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guNormalize(&x, &y, &z);
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a = a * D_80134D10;
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sine = sinf(a);
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cosine = cosf(a);
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ab = x * y * (1 - cosine);
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bc = y * z * (1 - cosine);
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ca = z * x * (1 - cosine);
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guMtxIdentF(m);
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xs = x * sine;
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ys = y * sine;
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zs = z * sine;
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t = x * x;
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m[0][0] = (1 - t) * cosine + t;
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m[2][1] = bc - xs;
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m[1][2] = bc + xs;
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t = y * y;
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m[1][1] = (1 - t) * cosine + t;
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m[2][0] = ca + ys;
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m[0][2] = ca - ys;
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t = z * z;
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m[2][2] = (1 - t) * cosine + t;
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m[1][0] = ab - zs;
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m[0][1] = ab + zs;
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}
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void guRotate(Mtx* m, f32 a, f32 x, f32 y, f32 z) {
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f32 mf[4][4];
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guRotateF(mf, a, x, y, z);
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guMtxF2L((MtxF*)mf, m);
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}
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