43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
#include "global.h"
|
|
|
|
void guPerspectiveF(f32 mf[4][4], u16* perspNorm, f32 fovy, f32 aspect, f32 near, f32 far, f32 scale) {
|
|
f32 yscale;
|
|
s32 row;
|
|
s32 col;
|
|
|
|
guMtxIdentF(mf);
|
|
|
|
fovy *= GU_PI / 180.0;
|
|
yscale = cosf(fovy / 2) / sinf(fovy / 2);
|
|
mf[0][0] = yscale / aspect;
|
|
mf[1][1] = yscale;
|
|
mf[2][2] = (near + far) / (near - far);
|
|
mf[2][3] = -1;
|
|
mf[3][2] = 2 * near * far / (near - far);
|
|
mf[3][3] = 0.0f;
|
|
|
|
for (row = 0; row < 4; row++) {
|
|
for (col = 0; col < 4; col++) {
|
|
mf[row][col] *= scale;
|
|
}
|
|
}
|
|
|
|
if (perspNorm != NULL) {
|
|
if (near + far <= 2.0) {
|
|
*perspNorm = 65535;
|
|
} else {
|
|
*perspNorm = (f64)(1 << 17) / (near + far);
|
|
if (*perspNorm <= 0) {
|
|
*perspNorm = 1;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
void guPerspective(Mtx* m, u16* perspNorm, f32 fovy, f32 aspect, f32 near, f32 far, f32 scale) {
|
|
f32 mf[4][4];
|
|
|
|
guPerspectiveF(mf, perspNorm, fovy, aspect, near, far, scale);
|
|
//guMtxF2L((MtxF*)mf, m);
|
|
Matrix_MtxFToMtx((MtxF*)mf, m);
|
|
}
|