sm64coopdx/lib/src/guRotateF.c
2019-08-25 00:46:40 -04:00

42 lines
951 B
C

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