Implement bezier library's De Casteljau points function (#715)

* pre-rebase

* broken wasm

* hull lines

* update rust lib description

* update comments, handle match statement better, pass Point type to vue

* cleanup

* add linear case

* More idiomatic code

* Further simplifications to the algorithm and removal of more heap allocations

* Rename to de_casteljau_points and use colors for the iterations

* Small comment changes

* Improve colors

Co-authored-by: Jackie Chen <jackiechen73>
Co-authored-by: Keavon Chambers <keavon@keavon.com>
Co-authored-by: Hannah Li <hannahli2010@gmail.com>

bezier-rs/docs/interactive-docs/wasm/src/lib.rs

@@ -138,4 +138,14 @@ impl WasmBezier {
 		let bezier_points: Vec<Vec<Point>> = self.0.reduce(None).into_iter().map(bezier_to_points).collect();
 		to_js_value(bezier_points)
 	}
+
+	pub fn de_casteljau_points(&self, t: f64) -> JsValue {
+		let hull = self
+			.0
+			.de_casteljau_points(t)
+			.iter()
+			.map(|level| level.iter().map(|&point| Point { x: point.x, y: point.y }).collect::<Vec<Point>>())
+			.collect::<Vec<Vec<Point>>>();
+		to_js_value(hull)
+	}
 }