Bezier-rs: add Tangents/Normals to Point functions (#1547)

* Add tangent/normal to point to bézier-rs

* Add license information and general cleanup

* Bump version

* Add iframe demos

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

website/other/bezier-rs-demos/wasm/src/bezier.rs

@@ -300,6 +300,31 @@ impl WasmBezier {
 		let content = format!("{bezier}{}", draw_line(projected_point.x, projected_point.y, x, y, RED, 1.),);
 		wrap_svg_tag(content)
 	}
+	pub fn tangents_to_point(&self, x: f64, y: f64) -> String {
+		let bezier = self.get_bezier_path();
+		let mut content = String::new();
+		for t in self.0.tangents_to_point(DVec2::new(x, y)) {
+			let point = self.0.evaluate(TValue::Parametric(t));
+			content += &draw_line(x, y, point.x, point.y, RED, 1.);
+		}
+		use std::fmt::Write;
+		write!(content, "{bezier}").unwrap();
+
+		wrap_svg_tag(content)
+	}
+
+	pub fn normals_to_point(&self, x: f64, y: f64) -> String {
+		let bezier = self.get_bezier_path();
+		let mut content = String::new();
+		for t in self.0.normals_to_point(DVec2::new(x, y)) {
+			let point = self.0.evaluate(TValue::Parametric(t));
+			content += &draw_line(x, y, point.x, point.y, RED, 1.);
+		}
+		use std::fmt::Write;
+		write!(content, "{bezier}").unwrap();
+
+		wrap_svg_tag(content)
+	}
 
 	pub fn local_extrema(&self) -> String {
 		let local_extrema: [Vec<f64>; 2] = self.0.local_extrema();

website/other/bezier-rs-demos/wasm/src/lib.rs

@@ -4,7 +4,9 @@ mod svg_drawing;
 mod utils;
 
 use wasm_bindgen::prelude::*;
+
 pub static LOGGER: WasmLog = WasmLog;
+thread_local! { pub static HAS_CRASHED: std::cell::RefCell<bool> = std::cell::RefCell::new(false); }
 
 /// Initialize the backend
 #[wasm_bindgen(start)]
@@ -12,6 +14,16 @@ pub fn init() {
 	// Set up the logger with a default level of debug
 	log::set_logger(&LOGGER).expect("Failed to set logger");
 	log::set_max_level(log::LevelFilter::Trace);
+
+	fn panic_hook(info: &core::panic::PanicInfo) {
+		// Skip if we have already panicked
+		if HAS_CRASHED.with(|cell| cell.replace(true)) {
+			return;
+		}
+		log::error!("{}", info);
+	}
+
+	std::panic::set_hook(Box::new(panic_hook));
 }
 
 /// Logging to the JS console