multi-agent-broker/examples/dino.html at main · marsyanggo/multi-agent-broker · GitHub

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<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Dino</title>
  <style>
    *, *::before, *::after {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    html, body {
      width: 100%;
      height: 100%;
    }

    body {
      background: #fff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-family: "Courier New", Courier, monospace;
      color: #535353;
    }

    #game {
      display: block;
      border: 1px solid #000;
    }

    #caption {
      margin-top: 8px;
      font-size: 11px;
      letter-spacing: 0.05em;
      color: #535353;
      text-transform: lowercase;
    }
  </style>
</head>
<body>
  <canvas id="game" width="800" height="200"></canvas>
  <div id="caption">press space to jump</div>
  <script>
    (function() {
        const canvas = document.getElementById('game');
        const ctx = canvas.getContext('2d');
        ctx.imageSmoothingEnabled = false;

        const GRAVITY = 0.6;
        const JUMP_VEL = -12;
        const GROUND_Y = 180;
        const DINO_X = 50;
        const DINO_SIZE = 44;
        const DINO_START_Y = GROUND_Y - DINO_SIZE;
        const OBSTACLE_W = 20;
        const OBSTACLE_H = 40;
        const OBSTACLE_Y = GROUND_Y - OBSTACLE_H;
        const INITIAL_SPEED = 6;
        const MAX_SPEED = 12;
        const SPEED_STEP_SCORE = 500;
        const FONT_COLOR = '#535353';

        let dino = { x: DINO_X, y: DINO_START_Y, vy: 0, width: DINO_SIZE, height: DINO_SIZE, grounded: true };
        let obstacles = [];
        let spawnTimer = 0;
        let nextSpawnDelay = 1500; // ms
        let score = 0;
        let highScore = 0;
        let gameSpeed = INITIAL_SPEED;
        let state = 'playing'; // 'playing' | 'over'
        let lastTimestamp = performance.now();

        function reset() {
            dino = { x: DINO_X, y: DINO_START_Y, vy: 0, width: DINO_SIZE, height: DINO_SIZE, grounded: true };
            obstacles = [];
            spawnTimer = 0;
            nextSpawnDelay = 1500;
            score = 0;
            gameSpeed = INITIAL_SPEED;
            state = 'playing';
        }

        function spawnObstacle() {
            obstacles.push({ x: canvas.width, y: OBSTACLE_Y, width: OBSTACLE_W, height: OBSTACLE_H });
        }

        function rectOverlap(a, b) {
            return a.x < b.x + b.width &&
                   a.x + a.width > b.x &&
                   a.y < b.y + b.height &&
                   a.y + a.height > b.y;
        }

        function update(dt) {
            if (state === 'playing') {
                // Dino physics
                if (!dino.grounded) {
                    dino.vy += GRAVITY;
                    dino.y += dino.vy;
                    if (dino.y >= DINO_START_Y) {
                        dino.y = DINO_START_Y;
                        dino.vy = 0;
                        dino.grounded = true;
                    }
                }

                // Move obstacles
                obstacles.forEach(o => o.x -= gameSpeed);
                obstacles = obstacles.filter(o => o.x + o.width > -20);

                // Spawn logic
                spawnTimer += dt;
                if (spawnTimer >= nextSpawnDelay) {
                    spawnObstacle();
                    spawnTimer = 0;
                    nextSpawnDelay = 800 + Math.random() * 800; // 800‑1600 ms
                }

                // Collision detection
                for (let o of obstacles) {
                    if (rectOverlap(dino, o)) {
                        state = 'over';
                        break;
                    }
                }

                // Scoring and speed
                score++;
                if (score > highScore) highScore = score;
                if (score % SPEED_STEP_SCORE === 0 && gameSpeed < MAX_SPEED) {
                    gameSpeed++;
                }
            }
        }

        function render() {
            // Background
            ctx.fillStyle = '#fff';
            ctx.fillRect(0, 0, canvas.width, canvas.height);

            // Ground line
            ctx.fillStyle = FONT_COLOR;
            ctx.fillRect(0, GROUND_Y, canvas.width, 1);

            // Dino
            ctx.fillStyle = FONT_COLOR;
            ctx.fillRect(dino.x, dino.y, dino.width, dino.height);
            // Eye dot
            ctx.fillRect(dino.x + 30, dino.y + 10, 4, 4);

            // Obstacles
            obstacles.forEach(o => {
                ctx.fillRect(o.x, o.y, o.width, o.height);
            });

            // HUD (top‑right)
            const hiStr = String(highScore).padStart(5, '0');
            const curStr = String(score).padStart(5, '0');
            const hudText = `HI ${hiStr}   ${curStr}`;
            ctx.font = '14px monospace';
            ctx.textBaseline = 'top';
            ctx.fillStyle = FONT_COLOR;
            const hudWidth = ctx.measureText(hudText).width;
            ctx.fillText(hudText, canvas.width - hudWidth - 10, 10);

            // Game over overlay
            if (state === 'over') {
                ctx.fillStyle = FONT_COLOR;
                ctx.font = '24px monospace';
                const overMsg = 'GAME OVER';
                const overW = ctx.measureText(overMsg).width;
                ctx.fillText(overMsg, (canvas.width - overW) / 2, canvas.height / 2 - 20);

                ctx.font = '14px monospace';
                const subMsg = 'press R to restart';
                const subW = ctx.measureText(subMsg).width;
                ctx.fillText(subMsg, (canvas.width - subW) / 2, canvas.height / 2 + 10);
            }
        }

        function loop(timestamp) {
            const dt = timestamp - lastTimestamp;
            lastTimestamp = timestamp;

            update(dt);
            render();

            requestAnimationFrame(loop);
        }

        // Input handling
        window.addEventListener('keydown', function (e) {
            if (e.code === 'Space' || e.code === 'ArrowUp') {
                if (state === 'playing' && dino.grounded) {
                    dino.vy = JUMP_VEL;
                    dino.grounded = false;
                }
                e.preventDefault();
            } else if (e.code === 'KeyR') {
                if (state === 'over') {
                    reset();
                }
            }
        });

        canvas.addEventListener('touchstart', function (e) {
            if (state === 'playing' && dino.grounded) {
                dino.vy = JUMP_VEL;
                dino.grounded = false;
            }
            e.preventDefault();
        }, { passive: false });

        requestAnimationFrame(loop);
    })();
  </script>
</body>
</html>