0.1.0-1-alpha.2-fix.2

crates/apps/game-reflex-poc-tauri/frontend/ts/game.ts

@@ -0,0 +1,67 @@
+// file: crates/apps/game-reflex-poc-tauri/frontend/ts/game.ts
+// version: 1
+
+import init, { ReflexWasmGame } from "../wasm/game_reflex_poc_wasm.js";
+import { tracingDebug, tracingTrace } from "./logging";
+
+const FRAME_MS = 16;
+
+function color(red: number, green: number, blue: number): string {
+    return `rgb(${red} ${green} ${blue})`;
+}
+
+function resizeCanvas(canvas: HTMLCanvasElement): void {
+    const ratio = window.devicePixelRatio || 1;
+    const width = Math.max(1, Math.floor(canvas.clientWidth * ratio));
+    const height = Math.max(1, Math.floor(canvas.clientHeight * ratio));
+    if (canvas.width !== width || canvas.height !== height) {
+        canvas.width = width;
+        canvas.height = height;
+    }
+}
+
+function render(game: ReflexWasmGame, canvas: HTMLCanvasElement, context: CanvasRenderingContext2D, score: HTMLOutputElement): void {
+    resizeCanvas(canvas);
+    context.fillStyle = color(game.background_red(), game.background_green(), game.background_blue());
+    context.fillRect(0, 0, canvas.width, canvas.height);
+    const count = game.rectangle_count();
+    for (let index = 0; index < count; index += 1) {
+        context.fillStyle = color(game.rectangle_red(index), game.rectangle_green(index), game.rectangle_blue(index));
+        context.fillRect(
+            game.rectangle_x(index) * canvas.width,
+            game.rectangle_y(index) * canvas.height,
+            game.rectangle_width(index) * canvas.width,
+            game.rectangle_height(index) * canvas.height,
+        );
+    }
+    score.value = `Score : ${game.score()}`;
+}
+
+export async function startGame(canvas: HTMLCanvasElement, score: HTMLOutputElement): Promise<void> {
+    await init();
+    await tracingDebug("Reflex WASM module initialized");
+    const context = canvas.getContext("2d");
+    if (context === null) {
+        throw new Error("2D canvas context is unavailable");
+    }
+    const game = new ReflexWasmGame();
+    canvas.addEventListener("pointerdown", event => {
+        const bounds = canvas.getBoundingClientRect();
+        const x = (event.clientX - bounds.left) / bounds.width;
+        const y = (event.clientY - bounds.top) / bounds.height;
+        game.pointer_down(x, y);
+        render(game, canvas, context, score);
+        void tracingTrace(`pointerdown x=${x.toFixed(4)} y=${y.toFixed(4)} score=${game.score()}`);
+    });
+    let previous = performance.now();
+    function frame(now: number): void {
+        while (now - previous >= FRAME_MS) {
+            game.tick();
+            previous += FRAME_MS;
+        }
+        render(game, canvas, context, score);
+        window.requestAnimationFrame(frame);
+    }
+    render(game, canvas, context, score);
+    window.requestAnimationFrame(frame);
+}