void hmd_ortho()
{
hmd_persp(0.5f, 2.0f);
int w = video.device_w;
int h = video.device_h;
glScalef ( 1.25f / h, 1.25f / h, 1.0f);
glTranslatef(-0.50f * w, -0.50f * h, -1.0f);
}
void video_push_persp(float fov, float n, float f)
{
if (hmd_stat())
hmd_persp(n, f);
else
{
GLfloat m[4][4];
GLfloat r = fov / 2 * V_PI / 180;
GLfloat s = fsinf(r);
GLfloat c = fcosf(r) / s;
GLfloat a = ((GLfloat) video.device_w /
(GLfloat) video.device_h);
glMatrixMode(GL_PROJECTION);
{
glLoadIdentity();
m[0][0] = c / a;
m[0][1] = 0.0f;
m[0][2] = 0.0f;
m[0][3] = 0.0f;
m[1][0] = 0.0f;
m[1][1] = c;
m[1][2] = 0.0f;
m[1][3] = 0.0f;
m[2][0] = 0.0f;
m[2][1] = 0.0f;
m[2][2] = -(f + n) / (f - n);
m[2][3] = -1.0f;
m[3][0] = 0.0f;
m[3][1] = 0.0f;
m[3][2] = -2.0f * n * f / (f - n);
m[3][3] = 0.0f;
glMultMatrixf(&m[0][0]);
}
glMatrixMode(GL_MODELVIEW);
{
glLoadIdentity();
}
}
}
void video_push_persp(float fov, float n, float f)
{
if (hmd_stat())
hmd_persp(n, f);
else
{
GLfloat m[4][4];
GLfloat r = fov / 2 * V_PI / 180;
GLfloat s = sin(r);
GLfloat c = cos(r) / s;
GLfloat a = ((GLfloat) config_get_d(CONFIG_WIDTH) /
(GLfloat) config_get_d(CONFIG_HEIGHT));
glMatrixMode(GL_PROJECTION);
{
glLoadIdentity();
m[0][0] = c / a;
m[0][1] = 0.0f;
m[0][2] = 0.0f;
m[0][3] = 0.0f;
m[1][0] = 0.0f;
m[1][1] = c;
m[1][2] = 0.0f;
m[1][3] = 0.0f;
m[2][0] = 0.0f;
m[2][1] = 0.0f;
m[2][2] = -(f + n) / (f - n);
m[2][3] = -1.0f;
m[3][0] = 0.0f;
m[3][1] = 0.0f;
m[3][2] = -2.0f * n * f / (f - n);
m[3][3] = 0.0f;
glMultMatrixf(&m[0][0]);
}
glMatrixMode(GL_MODELVIEW);
{
glLoadIdentity();
}
}
}
