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Bezier-rs: Add SubpathTValue and euclidean parameterization for subpaths (#1027)

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* Added SubpathTValue and euclidean parameterization for subpaths

* Small fix

* Added bounds checking to get_segment

* Code review

* code review nit for clarity

---------

Co-authored-by: Hannah Li <hannahli2010@gmail.com>
Co-authored-by: Keavon Chambers <keavon@keavon.com>
This commit is contained in:
Rob Nadal
2023-02-17 15:33:52 -05:00
committed by Keavon Chambers
co-authored by Hannah Li Keavon Chambers
parent 344f243432
commit 9a52cae9b9
10 changed files with 334 additions and 247 deletions
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libraries/bezier-rs/src/subpath/core.rs
+6 -10
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@@ -50,16 +50,12 @@ impl Subpath {
number_of_curves
}
pub fn find_curve_parametric(&self, t: f64) -> (Option<Bezier>, f64) {
assert!((0.0..=1.).contains(&t));
let number_of_curves = self.len_segments() as f64;
let scaled_t = t * number_of_curves;
let target_curve_index = scaled_t.floor() as i32;
let target_curve_t = scaled_t % 1.;
(self.iter().nth(target_curve_index as usize), target_curve_t)
/// Returns a copy of the bezier segment at the given segment index, if this segment exists.
pub fn get_segment(&self, segment_index: usize) -> Option<Bezier> {
if segment_index >= self.len_segments() {
return None;
}
Some(self[segment_index].to_bezier(&self[(segment_index + 1) % self.len()]))
}
/// Returns an iterator of the [Bezier]s along the `Subpath`.