Mat4 OrbitCamera::get_view_matrix() const
{
Mat4 view_matrix;
- view_matrix.translate(Vec3(0, 0, -distance));
- view_matrix.rotate_x(phi * (float)M_PI / 180);
view_matrix.rotate_y(theta * (float)M_PI / 180);
+ view_matrix.rotate_x(phi * (float)M_PI / 180);
+ view_matrix.translate(Vec3(0, 0, -distance));
return view_matrix;
}
-Mat4 calc_projection_matrix(float f, float n, float aspect, float fov)
+Mat4 calc_projection_matrix(float fov_deg, float aspect, float n, float f)
{
+ float fov = fov_deg / 180 * M_PI;
+
float tmp;
tmp = 1 / tan(fov / 2.0);
+ /* near - far clipping planes */
+ float range = n - f;
+
Mat4 pmat = Mat4(
- -tmp/aspect, 0, 0, 0,
+ tmp/aspect, 0, 0, 0,
0, tmp, 0, 0,
- 0, 0, (f + n) / (n - f), (2 * f * n) / (n - f),
- 0, 0, -1, 0
+ 0, 0, (f + n) / range, -1,
+ 0, 0, 2 * n * f / range, 0
);
return pmat;