extern crate cgmath;
use cgmath::*;
#[test]
fn test_invert() {
let v = Vector3::new(1.0f64, 2.0, 3.0);
let t = Decomposed {
scale: 1.5f64,
rot: Quaternion::new(0.5f64,0.5,0.5,0.5),
disp: Vector3::new(6.0f64,-7.0,8.0)
};
let ti = t.invert().expect("Expected successful inversion");
let vt = t.transform_vector( &v );
assert!(v.approx_eq( &ti.transform_vector( &vt ) ));
}
#[test]
fn test_look_at() {
let eye = Point3::new(0.0f64, 0.0, -5.0);
let center = Point3::new(0.0f64, 0.0, 0.0);
let up = Vector3::new(1.0f64, 0.0, 0.0);
let t: Decomposed<f64,Vector3<f64>,Quaternion<f64>> = Transform::look_at(&eye, ¢er, &up);
let point = Point3::new(1.0f64, 0.0, 0.0);
let view_point = Point3::new(0.0f64, 1.0, 5.0);
assert!( t.transform_point(&point).approx_eq(&view_point) );
}
#[test]
fn test_components() {
let t = Decomposed {
scale: 1.5f64,
rot: Quaternion::new(0.5f64,0.5,0.5,0.5),
disp: Vector3::new(6.0f64,-7.0,8.0)
};
let (scale, rot, disp) = t.decompose();
assert_eq!(scale, Vector3::from_value(t.scale));
assert_eq!(rot, t.rot);
assert_eq!(disp, t.disp);
}