Function mat4_transform_dir

native/shared/src/picking.rs:287–294

(m: &[[f32; 4]; 4], d: &[f32; 3])

}

fn mat4_transform_dir(m: &[[f32; 4]; 4], d: &[f32; 3]) -> [f32; 3] {
    // Transform direction (no translation, no perspective divide)
    [
        m[0][0]*d[0] + m[1][0]*d[1] + m[2][0]*d[2],
        m[0][1]*d[0] + m[1][1]*d[1] + m[2][1]*d[2],
        m[0][2]*d[0] + m[1][2]*d[1] + m[2][2]*d[2],
    ]
}

fn mat4_inverse_local(m: &[[f32; 4]; 4]) -> [[f32; 4]; 4] {
    crate::renderer::mat4_invert(*m)