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