WIP

engine/system/processPhysics.ts

@@ -1,4 +1,7 @@
 import type { Circle } from "#/engine/Circle.ts";
+import type MapProxy from "#/engine/lib/MapProxy.ts";
+import type { Polygon } from "#/engine/Polygon.ts";
+import type { Rect } from "#/engine/Rect.ts";
 import $ from "#/engine/Scene.ts";
 import type { Vector } from "#/engine/Vector.ts";
 
@@ -8,26 +11,51 @@ const POLYGON = 2;
 
 type Shape = 0 | 1 | 2;
 
-export type Collider<T> = {
+export type Collider = {
 	shape: Shape;
-	body: T;
 };
 
-export type Collision = {};
+export type Collision = {
+	id: string;
+};
 
-export function moveAndCollide<T>(
-	collider: Collider<T>,
+const collisions = new Map<string, Collision>();
+
+function check(
+	id: string,
+	collider: Collider,
+	position: Vector,
+	colliders: MapProxy<string, Collider>,
+): string | undefined {
+	for (const [oid, other] of colliders.entries()) {
+		if (oid !== id && other) {
+			return oid;
+		}
+	}
+}
+
+export function moveAndCollide(
+	id: string,
 	velocity: Vector,
 	delta: number,
-): Collision {
-	return {};
+): Collision | undefined {
+	return collisions.get(id);
 }
 
 export function processPhysics(
 	ctx: CanvasRenderingContext2D,
 	delta: number,
 ): void {
-	for (const [id, collider] of $<Collider<unknown>>("collider")!.entries()) {
-		const position = $<Vector>("position")!.get(id);
+	const colliders = $<Collider>("collider")!;
+	const positions = $<Vector>("position")!;
+
+	for (const [id, collider] of colliders.entries()) {
+		const position = positions.get(id)!;
+		const target = check(id, collider.value, position.value, colliders);
+		if (target !== undefined) {
+			collisions.set(id, { id: target });
+		} else {
+			collisions.delete(id);
+		}
 	}
 }