Function mat4_transform_point

native/shared/src/picking.rs:278–285

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

}

fn mat4_transform_point(m: &[[f32; 4]; 4], p: &[f32; 3]) -> [f32; 3] {
    let v = mat4_mul_vec4(m, &[p[0], p[1], p[2], 1.0]);
    if v[3].abs() > 1e-8 {
        [v[0]/v[3], v[1]/v[3], v[2]/v[3]]
    } else {
        [v[0], v[1], v[2]]
    }
}

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