Function dot

native/shared/src/picking.rs:265–267

(a: &[f32; 3], b: &[f32; 3])

}

fn dot(a: &[f32; 3], b: &[f32; 3]) -> f32 {
    a[0]*b[0] + a[1]*b[1] + a[2]*b[2]
}

fn mat4_mul_vec4(m: &[[f32; 4]; 4], v: &[f32; 4]) -> [f32; 4] {
    [