44 lines
1.3 KiB
Rust
44 lines
1.3 KiB
Rust
#![cfg(feature = "cgmath")]
|
|
|
|
use cgmath as cg;
|
|
use splines::{Interpolation, Key, Spline};
|
|
|
|
#[test]
|
|
fn cgmath_vector_interpolation() {
|
|
use splines::Interpolate;
|
|
|
|
let start = cg::Vector2::new(0.0, 0.0);
|
|
let mid = cg::Vector2::new(0.5, 0.5);
|
|
let end = cg::Vector2::new(1.0, 1.0);
|
|
|
|
assert_eq!(Interpolate::lerp(start, end, 0.0), start);
|
|
assert_eq!(Interpolate::lerp(start, end, 1.0), end);
|
|
assert_eq!(Interpolate::lerp(start, end, 0.5), mid);
|
|
}
|
|
|
|
#[test]
|
|
fn stroke_bezier_straight() {
|
|
use float_cmp::approx_eq;
|
|
|
|
let keys = vec![
|
|
Key::new(
|
|
0.0,
|
|
cg::Vector2::new(0., 1.),
|
|
Interpolation::StrokeBezier(cg::Vector2::new(0., 1.), cg::Vector2::new(0., 1.)),
|
|
),
|
|
Key::new(
|
|
5.0,
|
|
cg::Vector2::new(5., 1.),
|
|
Interpolation::StrokeBezier(cg::Vector2::new(5., 1.), cg::Vector2::new(5., 1.)),
|
|
),
|
|
];
|
|
let spline = Spline::from_vec(keys);
|
|
|
|
assert!(approx_eq!(f32, spline.clamped_sample(0.0).unwrap().y, 1.));
|
|
assert!(approx_eq!(f32, spline.clamped_sample(1.0).unwrap().y, 1.));
|
|
assert!(approx_eq!(f32, spline.clamped_sample(2.0).unwrap().y, 1.));
|
|
assert!(approx_eq!(f32, spline.clamped_sample(3.0).unwrap().y, 1.));
|
|
assert!(approx_eq!(f32, spline.clamped_sample(4.0).unwrap().y, 1.));
|
|
assert!(approx_eq!(f32, spline.clamped_sample(5.0).unwrap().y, 1.));
|
|
}
|