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Bezier-rs: Add Euclidean parameterization to Bezier::evaluate (#828)

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* Add enum to evaluate for differenciating compute type

* Add euclidean parameterization and update styling in the UI

Co-authored-by: Rob Nadal <robnadal44@gmail.com>

* Update usage of evaluate in graphite

* Add description

* Code review changes

* Update tests

* Improve ComputeType ergonomics

* Large code review/cleanup pass

Co-authored-by: Rob Nadal <robnadal44@gmail.com>
Co-authored-by: Keavon Chambers <keavon@keavon.com>
This commit is contained in:
Hannah Li
2022-11-18 20:37:52 -08:00
committed by Keavon Chambers
co-authored by Rob Nadal Keavon Chambers
parent a220bfa759
commit 01a9724389
15 changed files with 341 additions and 276 deletions
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libraries/bezier-rs/src/utils.rs
+7
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@@ -3,6 +3,13 @@ use crate::consts::{MAX_ABSOLUTE_DIFFERENCE, STRICT_MAX_ABSOLUTE_DIFFERENCE};
use glam::{BVec2, DMat2, DVec2};
use std::f64::consts::PI;
#[derive(Copy, Clone, PartialEq)]
pub enum ComputeType {
Parametric(f64),
Euclidean(f64),
EuclideanWithinError { t: f64, epsilon: f64 },
}
/// Helper to perform the computation of a and c, where b is the provided point on the curve.
/// Given the correct power of `t` and `(1-t)`, the computation is the same for quadratic and cubic cases.
/// Relevant derivation and the definitions of a, b, and c can be found in [the projection identity section](https://pomax.github.io/bezierinfo/#abc) of Pomax's bezier curve primer.