19 lines
645 B
C
19 lines
645 B
C
#include <c3d/maths.h>
|
|
|
|
void Mtx_PerspStereo(C3D_Mtx* mtx, float fovy, float aspect, float near, float far, float iod, float screen, bool isLeftHanded)
|
|
{
|
|
float fovy_tan = tanf(fovy/2.0f);
|
|
float fovy_tan_aspect = fovy_tan*aspect;
|
|
float shift = iod / (2.0f*screen); // 'near' not in the numerator because it cancels out in mp.r[1].z
|
|
|
|
Mtx_Zeros(mtx);
|
|
|
|
mtx->r[0].x = 1.0f / fovy_tan_aspect;
|
|
mtx->r[0].w = -iod / 2.0f;
|
|
mtx->r[1].y = 1.0f / fovy_tan;
|
|
mtx->r[2].w = near * far / (near - far);
|
|
mtx->r[3].z = isLeftHanded ? 1.0f : -1.0f;
|
|
mtx->r[0].z = mtx->r[3].z * shift / fovy_tan_aspect;
|
|
mtx->r[2].z = -mtx->r[3].z * near / (near - far);
|
|
}
|