131 lines
4.7 KiB
Rust
131 lines
4.7 KiB
Rust
extern crate splines;
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use splines::{Interpolation, Key, Spline};
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#[test]
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fn step_interpolation_0() {
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let start = Key::new(0., 0., Interpolation::Step(0.));
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let end = Key::new(1., 10., Interpolation::default());
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let spline = Spline::from_vec(vec![start, end]);
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assert_eq!(spline.sample(0.), Some(10.));
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assert_eq!(spline.sample(0.1), Some(10.));
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assert_eq!(spline.sample(0.2), Some(10.));
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assert_eq!(spline.sample(0.5), Some(10.));
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assert_eq!(spline.sample(0.9), Some(10.));
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assert_eq!(spline.sample(1.), None);
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assert_eq!(spline.clamped_sample(1.), 10.);
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}
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#[test]
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fn step_interpolation_0_5() {
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let start = Key::new(0., 0., Interpolation::Step(0.5));
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let end = Key::new(1., 10., Interpolation::default());
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let spline = Spline::from_vec(vec![start, end]);
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assert_eq!(spline.sample(0.), Some(0.));
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assert_eq!(spline.sample(0.1), Some(0.));
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assert_eq!(spline.sample(0.2), Some(0.));
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assert_eq!(spline.sample(0.5), Some(10.));
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assert_eq!(spline.sample(0.9), Some(10.));
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assert_eq!(spline.sample(1.), None);
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assert_eq!(spline.clamped_sample(1.), 10.);
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}
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#[test]
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fn step_interpolation_0_75() {
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let start = Key::new(0., 0., Interpolation::Step(0.75));
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let end = Key::new(1., 10., Interpolation::default());
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let spline = Spline::from_vec(vec![start, end]);
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assert_eq!(spline.sample(0.), Some(0.));
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assert_eq!(spline.sample(0.1), Some(0.));
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assert_eq!(spline.sample(0.2), Some(0.));
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assert_eq!(spline.sample(0.5), Some(0.));
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assert_eq!(spline.sample(0.9), Some(10.));
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assert_eq!(spline.sample(1.), None);
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assert_eq!(spline.clamped_sample(1.), 10.);
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}
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#[test]
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fn step_interpolation_1() {
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let start = Key::new(0., 0., Interpolation::Step(1.));
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let end = Key::new(1., 10., Interpolation::default());
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let spline = Spline::from_vec(vec![start, end]);
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assert_eq!(spline.sample(0.), Some(0.));
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assert_eq!(spline.sample(0.1), Some(0.));
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assert_eq!(spline.sample(0.2), Some(0.));
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assert_eq!(spline.sample(0.5), Some(0.));
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assert_eq!(spline.sample(0.9), Some(0.));
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assert_eq!(spline.sample(1.), None);
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assert_eq!(spline.clamped_sample(1.), 10.);
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}
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#[test]
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fn linear_interpolation() {
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let start = Key::new(0., 0., Interpolation::Linear);
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let end = Key::new(1., 10., Interpolation::default());
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let spline = Spline::from_vec(vec![start, end]);
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assert_eq!(spline.sample(0.), Some(0.));
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assert_eq!(spline.sample(0.1), Some(1.));
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assert_eq!(spline.sample(0.2), Some(2.));
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assert_eq!(spline.sample(0.5), Some(5.));
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assert_eq!(spline.sample(0.9), Some(9.));
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assert_eq!(spline.sample(1.), None);
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assert_eq!(spline.clamped_sample(1.), 10.);
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}
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#[test]
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fn linear_interpolation_several_keys() {
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let start = Key::new(0., 0., Interpolation::Linear);
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let k1 = Key::new(1., 5., Interpolation::Linear);
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let k2 = Key::new(2., 0., Interpolation::Linear);
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let k3 = Key::new(3., 1., Interpolation::Linear);
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let k4 = Key::new(10., 2., Interpolation::Linear);
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let end = Key::new(11., 4., Interpolation::default());
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let spline = Spline::from_vec(vec![start, k1, k2, k3, k4, end]);
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assert_eq!(spline.sample(0.), Some(0.));
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assert_eq!(spline.sample(0.1), Some(0.5));
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assert_eq!(spline.sample(0.2), Some(1.));
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assert_eq!(spline.sample(0.5), Some(2.5));
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assert_eq!(spline.sample(0.9), Some(4.5));
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assert_eq!(spline.sample(1.), Some(5.));
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assert_eq!(spline.sample(1.5), Some(2.5));
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assert_eq!(spline.sample(2.), Some(0.));
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assert_eq!(spline.sample(2.75), Some(0.75));
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assert_eq!(spline.sample(3.), Some(1.));
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assert_eq!(spline.sample(6.5), Some(1.5));
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assert_eq!(spline.sample(10.), Some(2.));
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assert_eq!(spline.clamped_sample(11.), 4.);
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}
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#[test]
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fn several_interpolations_several_keys() {
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let start = Key::new(0., 0., Interpolation::Step(0.5));
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let k1 = Key::new(1., 5., Interpolation::Linear);
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let k2 = Key::new(2., 0., Interpolation::Step(0.1));
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let k3 = Key::new(3., 1., Interpolation::Linear);
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let k4 = Key::new(10., 2., Interpolation::Linear);
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let end = Key::new(11., 4., Interpolation::default());
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let spline = Spline::from_vec(vec![start, k1, k2, k3, k4, end]);
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assert_eq!(spline.sample(0.), Some(0.));
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assert_eq!(spline.sample(0.1), Some(0.));
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assert_eq!(spline.sample(0.2), Some(0.));
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assert_eq!(spline.sample(0.5), Some(5.));
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assert_eq!(spline.sample(0.9), Some(5.));
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assert_eq!(spline.sample(1.), Some(5.));
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assert_eq!(spline.sample(1.5), Some(2.5));
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assert_eq!(spline.sample(2.), Some(0.));
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assert_eq!(spline.sample(2.05), Some(0.));
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assert_eq!(spline.sample(2.1), Some(0.));
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assert_eq!(spline.sample(2.75), Some(1.));
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assert_eq!(spline.sample(3.), Some(1.));
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assert_eq!(spline.sample(6.5), Some(1.5));
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assert_eq!(spline.sample(10.), Some(2.));
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assert_eq!(spline.clamped_sample(11.), 4.);
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}
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