89 lines
2.0 KiB
C
89 lines
2.0 KiB
C
#include <math.h>
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#include "z64.h"
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void guMtxF2L(float mf[4][4], Mtx* m) {
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unsigned int r, c;
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s32 tmp1;
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s32 tmp2;
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s32* m1 = &m->m[0][0];
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s32* m2 = &m->m[2][0];
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for (r = 0; r < 4; r++) {
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for (c = 0; c < 2; c++) {
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tmp1 = mf[r][2 * c] * 65536.0f;
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tmp2 = mf[r][2 * c + 1] * 65536.0f;
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*m1++ = (tmp1 & 0xffff0000) | ((tmp2 >> 0x10) & 0xffff);
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*m2++ = ((tmp1 << 0x10) & 0xffff0000) | (tmp2 & 0xffff);
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}
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}
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}
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void guMtxL2F(float mf[4][4], Mtx* m) {
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unsigned int r, c;
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u32 tmp1;
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u32 tmp2;
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u32* m1;
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u32* m2;
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s32 stmp1, stmp2;
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m1 = (u32*)&m->m[0][0];
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m2 = (u32*)&m->m[2][0];
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for (r = 0; r < 4; r++) {
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for (c = 0; c < 2; c++) {
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tmp1 = (*m1 & 0xffff0000) | ((*m2 >> 0x10) & 0xffff);
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tmp2 = ((*m1++ << 0x10) & 0xffff0000) | (*m2++ & 0xffff);
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stmp1 = *(s32*)&tmp1;
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stmp2 = *(s32*)&tmp2;
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mf[r][c * 2 + 0] = stmp1 / 65536.0f;
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mf[r][c * 2 + 1] = stmp2 / 65536.0f;
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}
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}
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}
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void guMtxIdentF(f32 mf[4][4]) {
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unsigned int r, c;
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for (r = 0; r < 4; r++) {
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for (c = 0; c < 4; c++) {
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if (r == c) {
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mf[r][c] = 1.0f;
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} else {
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mf[r][c] = 0.0f;
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}
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}
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}
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}
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void guMtxIdent(Mtx* m) {
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guMtxIdentF(m->m);
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}
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void guTranslateF(float m[4][4], float x, float y, float z) {
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guMtxIdentF(m);
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m[3][0] = x;
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m[3][1] = y;
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m[3][2] = z;
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}
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void guTranslate(Mtx* m, float x, float y, float z) {
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float mf[4][4];
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guTranslateF(mf, x, y, z);
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guMtxF2L(mf, m);
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}
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void guScaleF(float mf[4][4], float x, float y, float z) {
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guMtxIdentF(mf);
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mf[0][0] = x;
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mf[1][1] = y;
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mf[2][2] = z;
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mf[3][3] = 1.0;
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}
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void guScale(Mtx* m, float x, float y, float z) {
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float mf[4][4];
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guScaleF(mf, x, y, z);
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guMtxF2L(mf, m);
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}
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void guNormalize(f32* x, f32* y, f32* z) {
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f32 tmp = 1.0f / sqrtf(*x * *x + *y * *y + *z * *z);
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*x = *x * tmp;
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*y = *y * tmp;
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*z = *z * tmp;
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}
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