Add voronoi rendering

src/main.rs

@@ -60,7 +60,8 @@ async fn main() {
 			}
 		}
 		dd.update();
-		dd.draw();
+		//dd.draw_delaunay();
+		dd.draw_voronoi();
 		next_frame().await;
 	}
 }
@@ -442,7 +443,7 @@ impl fmt::Debug for Triangle {
 }
 
 impl DelaunayDemo {
-	fn draw(&self) {
+	fn draw_delaunay(&self) {
 		clear_background(BG);
 		let mut highlight_segments = Vec::new();
 		for triangle in &self.triangles {
@@ -487,6 +488,23 @@ impl DelaunayDemo {
 		}
 	}
 
+	fn draw_voronoi(&self) {
+		clear_background(BG);
+		for neighbors in self.adjacency.values() {
+			if let (Occupant(tri1), Friend(tri2)) = neighbors {
+				let (center1, _) = tri1.circumcenter();
+				let (center2, _) = tri2.circumcenter();
+				draw_line(
+					center1.x as f32,
+					center1.y as f32,
+					center2.x as f32,
+					center2.y as f32,
+					3.0, FG
+				);
+			}
+		}
+	}
+
 	fn update(&mut self) {
 		if self.poisoned {
 			return