1 use na::{Orthographic3, Perspective3, Point3};
2
3 #[test]
perspective_inverse()4 fn perspective_inverse() {
5 let proj = Perspective3::new(800.0 / 600.0, 3.14 / 2.0, 1.0, 1000.0);
6 let inv = proj.inverse();
7
8 let id = inv * proj.into_inner();
9
10 assert!(id.is_identity(1.0e-7));
11 }
12
13 #[test]
orthographic_inverse()14 fn orthographic_inverse() {
15 let proj = Orthographic3::new(1.0, 2.0, -3.0, -2.5, 10.0, 900.0);
16 let inv = proj.inverse();
17
18 let id = inv * proj.into_inner();
19
20 assert!(id.is_identity(1.0e-7));
21 }
22
23 #[test]
perspective_matrix_point_transformation()24 fn perspective_matrix_point_transformation() {
25 // https://github.com/dimforge/nalgebra/issues/640
26 let proj = Perspective3::new(4.0 / 3.0, 90.0, 0.1, 100.0);
27 let perspective_inv = proj.as_matrix().try_inverse().unwrap();
28 let some_point = Point3::new(1.0, 2.0, 0.0);
29
30 assert_eq!(
31 perspective_inv.transform_point(&some_point),
32 Point3::from_homogeneous(perspective_inv * some_point.coords.push(1.0)).unwrap()
33 );
34 }
35
36 #[cfg(feature = "proptest-support")]
37 mod proptest_tests {
38 use na::{Orthographic3, Perspective3};
39
40 use crate::proptest::*;
41 use proptest::{prop_assert, proptest};
42
43 proptest! {
44 #[test]
45 fn perspective_project_unproject(pt in point3()) {
46 let proj = Perspective3::new(800.0 / 600.0, 3.14 / 2.0, 1.0, 1000.0);
47
48 let projected = proj.project_point(&pt);
49 let unprojected = proj.unproject_point(&projected);
50
51 prop_assert!(relative_eq!(pt, unprojected, epsilon = 1.0e-7))
52 }
53
54 #[test]
55 fn orthographic_project_unproject(pt in point3()) {
56 let proj = Orthographic3::new(1.0, 2.0, -3.0, -2.5, 10.0, 900.0);
57
58 let projected = proj.project_point(&pt);
59 let unprojected = proj.unproject_point(&projected);
60
61 prop_assert!(relative_eq!(pt, unprojected, epsilon = 1.0e-7))
62 }
63 }
64 }
65