Create Electron app

1 files changed, 40 insertions, 0 deletions

diff --git a/src/renderer/math/point.ts b/src/renderer/math/point.ts
new file mode 100644
index 0000000..0865b8f
--- /dev/null
+++ b/src/renderer/math/point.ts
@@ -0,0 +1,40 @@
+import { Collidable } from './collision';
+import { Line, Movement, normal } from './line';
+
+import { vec2 } from 'gl-matrix';
+
+export class Point implements Collidable {
+	constructor(public readonly p: vec2) {}
+
+	public collide(out: vec2, move: Movement, r: number): boolean {
+		const moveLine = move.toLineSegment();
+
+		if (moveLine.projectPointDistance(this.p) < 0)
+			return false;
+
+		const d = moveLine.distancePoint(this.p) / r;
+		if (Math.abs(d) >= 1)
+			return false;
+
+		const e = Math.sqrt(1 - d * d);
+
+		const t = moveLine.getNormal(vec2.create());
+		vec2.scale(t, t, d);
+		vec2.scaleAndAdd(t, t, moveLine.v, e);
+
+		const tr = vec2.scale(vec2.create(), t, r);
+
+		const refMove = move.translate(tr);
+
+		if (vec2.sqrDist(this.p, move.src) > r * r && !refMove.passes(this.p))
+			return false;
+
+		normal(t, t);
+
+		const tang = new Line(this.p, t);
+		tang.projectPoint(out, refMove.dest);
+		vec2.sub(out, out, tr);
+
+		return true;
+	}
+}