Psico/balls-animation.html at main · ivansouza/Psico · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
    <title>Gravity & Moving Gap (Slower)</title>
    <style>
        body {
            margin: 0;
            padding: 0;
            background-color: #050505;
            overflow: hidden;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            touch-action: none;
        }

        #gameCanvas {
            display: block;
        }

        #ui-layer {
            position: absolute;
            top: 20px;
            left: 20px;
            color: white;
            pointer-events: none;
            z-index: 10;
        }

        h1 {
            font-size: 1rem;
            margin: 0;
            color: #888;
            text-transform: uppercase;
            letter-spacing: 2px;
        }

        #ball-count {
            font-size: 2.5rem;
            font-weight: bold;
            color: #ff3333;
            margin: 0;
            text-shadow: 0 0 10px rgba(255, 51, 51, 0.4);
        }

        #instructions {
            position: absolute;
            bottom: 20px;
            width: 100%;
            text-align: center;
            color: #444;
            font-size: 0.9rem;
            pointer-events: none;
            user-select: none;
        }
    </style>
</head>
<body>

    <div id="ui-layer">
        <h1>Balls</h1>
        <p id="ball-count">1</p>
    </div>

    <div id="instructions">Tap screen to restart</div>

    <canvas id="gameCanvas"></canvas>

    <script>
        // --- CONFIGURAÇÕES / SETTINGS ---
        const BACKGROUND_COLOR = '#050505';
        const BORDER_COLOR = '#ffffff';
        const BORDER_THICKNESS = 10;
        const BALL_RADIUS = 8;
        const INITIAL_BALLS = 1;
        const MAX_BALLS = 10000;  // Limit 10k

        // Physics (Slower & Smoother)
        const GRAVITY = 0.15;        // Reduzido de 0.25
        const BOUNCE_DAMPING = 0.85;
        const FRICTION_X = 0.999;
        const SPAWN_SPEED_FACTOR = 1.1; // Aceleração menor ao multiplicar
        const MAX_SPEED = 10;           // Reduzido de 20 para evitar rastros/blur

        // Gap (Opening)
        let gap = {
            width: 150,
            x: 0,
            speed: 2, // Gap mais lento (era 4)
            height: BORDER_THICKNESS
        };

        const canvas = document.getElementById('gameCanvas');
        // alpha: false ajuda a evitar rastros de transparência e melhora performance
        const ctx = canvas.getContext('2d', { alpha: false });
        const countElement = document.getElementById('ball-count');

        let width, height;
        let balls = [];

        // --- BALL CLASS ---
        class Ball {
            constructor(x, y, vx, vy) {
                this.x = x;
                this.y = y;
                this.vx = vx;
                this.vy = vy;
                this.radius = BALL_RADIUS;

                // Color optimization
                const hue = Math.floor(Math.random() * 40);
                this.color = `hsl(${hue}, 100%, 50%)`;
            }

            update() {
                // Physics
                this.vy += GRAVITY;
                this.vx *= FRICTION_X;
                this.x += this.vx;
                this.y += this.vy;

                // --- COLLISIONS ---
                const leftLimit = BORDER_THICKNESS + this.radius;
                const rightLimit = width - BORDER_THICKNESS - this.radius;
                const topLimit = BORDER_THICKNESS + this.radius;
                const bottomWallY = height - BORDER_THICKNESS - this.radius;

                // Walls
                if (this.x < leftLimit) {
                    this.x = leftLimit;
                    this.vx *= -1 * BOUNCE_DAMPING;
                } else if (this.x > rightLimit) {
                    this.x = rightLimit;
                    this.vx *= -1 * BOUNCE_DAMPING;
                }

                if (this.y < topLimit) {
                    this.y = topLimit;
                    this.vy *= -1 * BOUNCE_DAMPING;
                }

                // Floor / Gap
                if (this.y > bottomWallY) {
                    // Is inside gap area?
                    const inGap = (this.x > gap.x && this.x < gap.x + gap.width);

                    if (!inGap) {
                        // Hit the floor
                        this.y = bottomWallY;

                        // Prevent infinite micro-bouncing
                        if (Math.abs(this.vy) < GRAVITY * 2) {
                             this.vy = 0;
                        } else {
                            this.vy *= -1 * BOUNCE_DAMPING;
                        }
                    }
                }
            }

            draw() {
                ctx.beginPath();
                ctx.arc(this.x, this.y, this.radius, 0, Math.PI * 2);
                ctx.fillStyle = this.color;
                ctx.fill();
            }

            isEscaped() {
                return (this.y - this.radius > height);
            }
        }

        // --- SYSTEM ---

        function resize() {
            width = window.innerWidth;
            height = window.innerHeight;
            canvas.width = width;
            canvas.height = height;

            gap.width = Math.min(180, width * 0.4);
            if (gap.x + gap.width > width) gap.x = width - gap.width - BORDER_THICKNESS;
        }

        function updateGap() {
            gap.x += gap.speed;
            if (gap.x <= 0) {
                gap.x = 0;
                gap.speed *= -1;
            }
            if (gap.x + gap.width >= width) {
                gap.x = width - gap.width;
                gap.speed *= -1;
            }
        }

        function spawnInitialBall() {
            balls = [];
            // Velocidade inicial reduzida proporcionalmente
            balls.push(new Ball(width / 2, height * 0.3, (Math.random() - 0.5) * 3, 0));
        }

        function multiplyBalls(originBall) {
            // CHECK MAX LIMIT 10k
            if (balls.length >= MAX_BALLS) return;

            let speed = Math.sqrt(originBall.vx**2 + originBall.vy**2);
            speed = Math.min(speed * SPAWN_SPEED_FACTOR, MAX_SPEED);
            // Velocidade mínima reduzida para 3 (era 5)
            speed = Math.max(speed, 3);

            // Create 2 balls
            for (let i = 0; i < 2; i++) {
                if (balls.length >= MAX_BALLS) break;

                const newX = Math.random() * (width - 100) + 50;
                const newY = height * 0.15;

                const angle = Math.random() * Math.PI;
                const vx = Math.cos(angle) * speed;
                const vy = Math.abs(Math.sin(angle) * speed);

                balls.push(new Ball(newX, newY, vx, vy));
            }
        }

        function drawWorld() {
            // Clear screen COMPLETE (No trails)
            ctx.fillStyle = BACKGROUND_COLOR;
            ctx.fillRect(0, 0, width, height);

            // Walls
            ctx.lineWidth = BORDER_THICKNESS;
            ctx.strokeStyle = BORDER_COLOR;
            ctx.lineCap = 'round';

            ctx.beginPath();
            ctx.moveTo(BORDER_THICKNESS/2, height);
            ctx.lineTo(BORDER_THICKNESS/2, 0);
            ctx.lineTo(width - BORDER_THICKNESS/2, 0);
            ctx.lineTo(width - BORDER_THICKNESS/2, height);
            ctx.stroke();

            // Floor split
            ctx.beginPath();
            ctx.moveTo(0, height - BORDER_THICKNESS/2);
            ctx.lineTo(gap.x, height - BORDER_THICKNESS/2);

            ctx.moveTo(gap.x + gap.width, height - BORDER_THICKNESS/2);
            ctx.lineTo(width, height - BORDER_THICKNESS/2);

            // Sombra leve apenas no chão
            ctx.shadowBlur = 10;
            ctx.shadowColor = "#ffffff";
            ctx.stroke();
            ctx.shadowBlur = 0; // Importante: Resetar sombra para não afetar as bolas
        }

        function animate() {
            updateGap();
            drawWorld();

            let ballsEscaped = [];

            for (let i = 0; i < balls.length; i++) {
                const ball = balls[i];
                ball.update();
                ball.draw();

                if (ball.isEscaped()) {
                    ballsEscaped.push(ball);
                }
            }

            // Remove and multiply
            for (let i = 0; i < ballsEscaped.length; i++) {
                const ball = ballsEscaped[i];
                const index = balls.indexOf(ball);
                if (index > -1) {
                    balls.splice(index, 1);
                    multiplyBalls(ball);
                }
            }

            countElement.innerText = balls.length;
            requestAnimationFrame(animate);
        }

        window.addEventListener('resize', resize);
        window.addEventListener('pointerdown', () => {
             // Restart on click/tap
             spawnInitialBall();
        });

        resize();
        spawnInitialBall();
        animate();

    </script>
</body>
</html>