aurora-animations/ai-gravity-field-202603242202.html at master · robertsong2000/aurora-animations · GitHub

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>引力场 - Gravity Field</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            overflow: hidden;
            background: #000;
            font-family: 'Arial', sans-serif;
        }

        canvas {
            display: block;
            position: absolute;
            top: 0;
            left: 0;
        }

        .info {
            position: fixed;
            bottom: 20px;
            left: 20px;
            color: rgba(255, 150, 50, 0.8);
            font-size: 14px;
            z-index: 100;
            pointer-events: none;
            text-shadow: 0 0 15px rgba(255, 100, 0, 0.6);
        }

        .title {
            position: fixed;
            top: 30px;
            left: 50%;
            transform: translateX(-50%);
            color: rgba(255, 150, 50, 0.9);
            font-size: 32px;
            font-weight: bold;
            z-index: 100;
            text-shadow: 0 0 30px rgba(255, 100, 0, 0.8);
            letter-spacing: 5px;
        }

        .fps {
            position: fixed;
            top: 20px;
            right: 20px;
            color: rgba(255, 150, 50, 0.6);
            font-size: 12px;
            font-family: monospace;
            z-index: 100;
        }

        @media (max-width: 768px) {
            .info {
                font-size: 11px;
                bottom: 10px;
                left: 10px;
            }
            .title {
                font-size: 20px;
                top: 15px;
            }
        }
    </style>
</head>
<body>
    <div class="title">🌀 引力场</div>
    <canvas id="gravity"></canvas>
    <div class="info">
        <div>🖱️ 点击 - 添加引力源</div>
        <div>👆 右键 - 移除引力源</div>
    </div>
    <div class="fps" id="fps">FPS: 60</div>

    <script>
        // 性能监控
        const fpsElement = document.getElementById('fps');
        let lastTime = performance.now();
        let frameCount = 0;

        // Canvas 设置
        const canvas = document.getElementById('gravity');
        const ctx = canvas.getContext('2d');

        let width, height;

        // 粒子系统
        let particles = [];
        const PARTICLE_COUNT = 500;

        // 引力源系统
        let gravitySources = [];
        const MAX_SOURCES = 5;

        // 颜色配置
        const COLORS = [
            '#ff6b6b', '#ffa500', '#ffff00', '#00ff00',
            '#00ffff', '#0080ff', '#8000ff', '#ff00ff'
        ];

        // 响应式调整
        function resize() {
            width = canvas.width = window.innerWidth;
            height = canvas.height = window.innerHeight;
            initParticles();
        }

        // 初始化粒子
        function initParticles() {
            particles = [];
            for (let i = 0; i < PARTICLE_COUNT; i++) {
                particles.push({
                    x: Math.random() * width,
                    y: Math.random() * height,
                    vx: (Math.random() - 0.5) * 2,
                    vy: (Math.random() - 0.5) * 2,
                    size: Math.random() * 2 + 1,
                    color: COLORS[Math.floor(Math.random() * COLORS.length)],
                    alpha: 0.5 + Math.random() * 0.5,
                });
            }
        }

        // 创建引力源
        function createGravitySource(x, y) {
            if (gravitySources.length >= MAX_SOURCES) {
                gravitySources.shift();
            }

            gravitySources.push({
                x: x,
                y: y,
                mass: 5000 + Math.random() * 5000,
                color: COLORS[gravitySources.length % COLORS.length],
            });
        }

        // 更新粒子
        function updateParticles() {
            particles.forEach(particle => {
                // 应用所有引力源的影响
                gravitySources.forEach(source => {
                    const dx = source.x - particle.x;
                    const dy = source.y - particle.y;
                    const dist = Math.sqrt(dx * dx + dy * dy);

                    if (dist > 10) { // 避免除以0
                        const force = source.mass / (dist * dist);
                        const angle = Math.atan2(dy, dx);

                        particle.vx += Math.cos(angle) * force * 0.001;
                        particle.vy += Math.sin(angle) * force * 0.001;
                    }
                });

                // 应用速度
                particle.x += particle.vx;
                particle.y += particle.vy;

                // 速度限制
                const speed = Math.sqrt(particle.vx * particle.vx + particle.vy * particle.vy);
                if (speed > 10) {
                    particle.vx = (particle.vx / speed) * 10;
                    particle.vy = (particle.vy / speed) * 10;
                }

                // 边界循环
                if (particle.x < 0) particle.x = width;
                if (particle.x > width) particle.x = 0;
                if (particle.y < 0) particle.y = height;
                if (particle.y > height) particle.y = 0;
            });
        }

        // 绘制粒子
        function drawParticles() {
            particles.forEach(particle => {
                ctx.save();
                ctx.fillStyle = particle.color;
                ctx.globalAlpha = particle.alpha;
                ctx.shadowBlur = 5;
                ctx.shadowColor = particle.color;
                ctx.beginPath();
                ctx.arc(particle.x, particle.y, particle.size, 0, Math.PI * 2);
                ctx.fill();
                ctx.restore();
            });
        }

        // 绘制引力源
        function drawGravitySources() {
            gravitySources.forEach(source => {
                // 引力场范围
                const gradient = ctx.createRadialGradient(
                    source.x, source.y, 0,
                    source.x, source.y, 150
                );
                gradient.addColorStop(0, source.color + '40');
                gradient.addColorStop(1, source.color + '00');

                ctx.fillStyle = gradient;
                ctx.beginPath();
                ctx.arc(source.x, source.y, 150, 0, Math.PI * 2);
                ctx.fill();

                // 引力源核心
                ctx.save();
                ctx.fillStyle = source.color;
                ctx.shadowBlur = 20;
                ctx.shadowColor = source.color;
                ctx.beginPath();
                ctx.arc(source.x, source.y, 10, 0, Math.PI * 2);
                ctx.fill();
                ctx.restore();
            });
        }

        // 绘制引力线
        function drawGravityLines() {
            if (gravitySources.length < 2) return;

            ctx.save();
            ctx.strokeStyle = 'rgba(255, 100, 0, 0.2)';
            ctx.lineWidth = 1;

            for (let i = 0; i < gravitySources.length; i++) {
                for (let j = i + 1; j < gravitySources.length; j++) {
                    ctx.beginPath();
                    ctx.moveTo(gravitySources[i].x, gravitySources[i].y);
                    ctx.lineTo(gravitySources[j].x, gravitySources[j].y);
                    ctx.stroke();
                }
            }

            ctx.restore();
        }

        // 主动画循环
        function animate(currentTime) {
            // 清除画布
            ctx.fillStyle = 'rgba(0, 0, 0, 0.1)';
            ctx.fillRect(0, 0, width, height);

            // 更新和绘制
            updateParticles();

            drawGravityLines();
            drawGravitySources();
            drawParticles();

            // FPS 计算
            frameCount++;
            if (frameCount >= 30) {
                const fps = Math.round(30 / ((currentTime - lastTime) / 1000 * 30));
                fpsElement.textContent = `FPS: ${Math.min(fps, 60)}`;
                frameCount = 0;
            }

            lastTime = currentTime;
            requestAnimationFrame(animate);
        }

        // 事件监听
        window.addEventListener('resize', resize);

        canvas.addEventListener('click', (e) => {
            createGravitySource(e.clientX, e.clientY);
        });

        canvas.addEventListener('contextmenu', (e) => {
            e.preventDefault();
            if (gravitySources.length > 0) {
                gravitySources.pop();
            }
        });

        canvas.addEventListener('touchstart', (e) => {
            e.preventDefault();
            createGravitySource(e.touches[0].clientX, e.touches[0].clientY);
        });

        // 初始化
        resize();
        // 添加初始引力源
        createGravitySource(width / 2, height / 2);
        requestAnimationFrame(animate);
    </script>
</body>
</html>