基于js的重力模拟研究

基于js的重力模拟研究

YQYStudio(一个为人民服务的公仆) 略有小成
  2025-02-09 22:48:23 2025-02-09 22:48:23 创建   2025-09-09 22:53:10 2025-09-09 22:53:10 更新      2.2k 字  13 分钟  

第一部分为在线调试代码，第二部分为重力算法代码块。

代码调试器 
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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">
    <title>在线 HTML 代码运行程序</title>
    <style>
        body {
            display: flex;
            margin: 0;
            height: 100vh;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        /* 左边输入区域 */
        #input-area {
            flex: 9;
            padding: 20px;
            background-color: #f4f4f9;
            box-shadow: 0 0 5px rgba(0, 0, 0, 0.1) inset;
        }

        #code-input {
            width: 100%;
            height: 100%;
            resize: none;
            font-family: monospace;
            border: 1px solid #ccc;
            border-radius: 4px;
            padding: 10px;
            box-sizing: border-box;
        }

        /* 右边功能区 */
        #function-area {
            flex: 2;
            padding: 20px;
            background-color: #e8e8f3;
            display: flex;
            flex-direction: column;
            box-shadow: -2px 0 5px rgba(0, 0, 0, 0.1);
        }

        button {
            margin-bottom: 10px;
            padding: 10px;
            border: none;
            border-radius: 4px;
            background-color: #007BFF;
            color: white;
            cursor: pointer;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
            transition: background-color 0.3s ease;
        }

        button:hover {
            background-color: #0056b3;
        }

        /* 模态框样式 */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            justify-content: center;
            align-items: center;
        }

        .modal-content {
            background-color: white;
            border-radius: 4px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
            position: relative;
            min-width: 300px;
            min-height: 200px;
            width: 80%;
            height: 80%;
        }

        .modal-header {
            padding: 10px;
            background-color: #f0f0f0;
            cursor: move;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid #ccc;
        }

        .close {
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
        }

        .close:hover {
            color: red;
        }

        .modal-body {
            padding: 10px;
            height: calc(100% - 41px);
        }

        .modal-body iframe {
            width: 100%;
            height: 100%;
            border: none;
        }

        /* 调整大小的边框样式 */
        .resizer {
            position: absolute;
        }

        .resizer.right {
            right: 0;
            top: 0;
            height: 100%;
            width: 5px;
            cursor: ew-resize;
        }

        .resizer.bottom {
            bottom: 0;
            left: 0;
            width: 100%;
            height: 5px;
            cursor: ns-resize;
        }

        .resizer.bottom-right {
            right: 0;
            bottom: 0;
            width: 10px;
            height: 10px;
            cursor: nwse-resize;
        }
    </style>
</head>

<body>
    <!-- 左边输入区域 -->
    <div id="input-area">
        <textarea id="code-input" placeholder="请输入 HTML 代码"></textarea>
    </div>
    <!-- 右边功能区 -->
    <div id="function-area">
        <button id="run-code">运行代码</button>
        <button id="copy-code">复制代码</button>
    </div>
    <!-- 模态框 -->
    <div id="modal" class="modal">
        <div class="modal-content">
            <div class="modal-header">
                <span>运行结果</span>
                <span class="close">&times;</span>
            </div>
            <div class="modal-body">
                <iframe id="result"></iframe>
            </div>
            <div class="resizer right"></div>
            <div class="resizer bottom"></div>
            <div class="resizer bottom-right"></div>
        </div>
    </div>

    <script>
        const codeInput = document.getElementById('code-input');
        const runCodeButton = document.getElementById('run-code');
        const copyCodeButton = document.getElementById('copy-code');
        const resultFrame = document.getElementById('result');
        const modal = document.getElementById('modal');
        const closeBtn = document.querySelector('.close');

        // 运行代码功能
        runCodeButton.addEventListener('click', () => {
            const code = codeInput.value;
            modal.style.display = 'flex';
            const doc = resultFrame.contentDocument || resultFrame.contentWindow.document;
            doc.open();
            doc.write(code);
            doc.close();
        });

        // 复制代码功能
        copyCodeButton.addEventListener('click', () => {
            codeInput.select();
            document.execCommand('copy');
            alert('代码已复制到剪贴板');
        });

        // 关闭模态框
        closeBtn.addEventListener('click', () => {
            modal.style.display = 'none';
        });

        // 点击模态框外部关闭模态框
        window.addEventListener('click', (event) => {
            if (event.target === modal) {
                modal.style.display = 'none';
            }
        });

        // 模态框拖动功能
        const modalHeader = document.querySelector('.modal-header');
        let isDragging = false;
        let offsetX, offsetY;

        modalHeader.addEventListener('mousedown', (e) => {
            isDragging = true;
            const content = modal.querySelector('.modal-content');
            offsetX = e.clientX - content.getBoundingClientRect().left;
            offsetY = e.clientY - content.getBoundingClientRect().top;
            e.preventDefault();
        });

        document.addEventListener('mousemove', (e) => {
            if (isDragging) {
                const content = modal.querySelector('.modal-content');
                content.style.left = (e.clientX - offsetX) + 'px';
                content.style.top = (e.clientY - offsetY) + 'px';
            }
        });

        document.addEventListener('mouseup', () => {
            isDragging = false;
        });

        // 模态框调整大小功能
        const resizers = document.querySelectorAll('.resizer');
        let currentResizer;

        resizers.forEach((resizer) => {
            resizer.addEventListener('mousedown', (e) => {
                currentResizer = resizer;
                isDragging = true;
                offsetX = e.clientX;
                offsetY = e.clientY;
                e.preventDefault();
            });
        });

        document.addEventListener('mousemove', (e) => {
            if (isDragging && currentResizer) {
                const content = modal.querySelector('.modal-content');
                const rect = content.getBoundingClientRect();

                if (currentResizer.classList.contains('right')) {
                    content.style.width = Math.max(300, rect.width + (e.clientX - offsetX)) + 'px';
                    offsetX = e.clientX;
                } else if (currentResizer.classList.contains('bottom')) {
                    content.style.height = Math.max(200, rect.height + (e.clientY - offsetY)) + 'px';
                    offsetY = e.clientY;
                } else if (currentResizer.classList.contains('bottom-right')) {
                    content.style.width = Math.max(300, rect.width + (e.clientX - offsetX)) + 'px';
                    content.style.height = Math.max(200, rect.height + (e.clientY - offsetY)) + 'px';
                    offsetX = e.clientX;
                    offsetY = e.clientY;
                }
            }
        });

        document.addEventListener('mouseup', () => {
            isDragging = false;
            currentResizer = null;
        });

        // 阻止模态框内点击触发关闭事件
        const modalContent = document.querySelector('.modal-content');
        modalContent.addEventListener('click', (e) => {
            e.stopPropagation();
        });
    </script>
</body>

</html>
重力模拟代码 
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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">
    <title>小球重力动画（优化版）</title>
    <style>
        body {
            display: flex;
            margin: 0;
            height: 100vh;
            background-color: #121212;
            color: white;
        }

        #animation-container {
            flex: 9;
            background-color: #1e1e1e;
            position: relative;
            overflow: hidden;
        }

        #control-panel {
            flex: 2;
            background-color: #262626;
            padding: 20px;
        }

        .ball {
            position: absolute;
            border-radius: 50%;
            left: 0;
            top: 0;
        }

        .wind-effect {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: repeating-linear-gradient(
                45deg,
                rgba(255, 255, 255, 0.1),
                rgba(255, 255, 255, 0.1) 5px,
                transparent 5px,
                transparent 10px
            );
            opacity: 0;
            transition: opacity 1s ease-in-out;
        }
    </style>
</head>

<body>
    <div id="animation-container"></div>
    <div id="control-panel">
        <button id="add-ball">增加小球数量</button>
        <button id="start-animation">开始动画</button>
        <button id="pause-animation">暂停动画</button>
        <button id="increase-speed">提高小球运动速度</button>
        <button id="clear-balls">清除小球</button>
        <button id="simulate-wind">模拟自然风</button>
        <button id="clear-wind">清除自然风</button>
        <button id="reset-animation">重置动画</button>
    </div>

    <script>
        const animationContainer = document.getElementById('animation-container');
        const balls = [];
        let isPaused = true;
        let gravity = 0.1;
        let speedMultiplier = 1;
        let animationFrameId;
        let windStrength = 0;
        let windEffect;
        const collisionEnergyLoss = 0.9; // 碰撞能量损耗因子

        // 缓存容器尺寸
        let containerWidth = animationContainer.offsetWidth;
        let containerHeight = animationContainer.offsetHeight;

        // 响应窗口大小变化
        window.addEventListener('resize', () => {
            containerWidth = animationContainer.offsetWidth;
            containerHeight = animationContainer.offsetHeight;
        });

        function createBall() {
            const ball = document.createElement('div');
            ball.className = 'ball';
            const size = Math.random() * 20 + 10;
            const initialX = Math.random() * (containerWidth - size);
            const initialY = 0;

            Object.assign(ball.style, {
                width: `${size}px`,
                height: `${size}px`,
                backgroundColor: `rgb(${Math.random() * 255},${Math.random() * 255},${Math.random() * 255})`,
                transform: `translate(${initialX}px, ${initialY}px)`
            });

            animationContainer.appendChild(ball);

            balls.push({
                element: ball,
                x: initialX,
                y: initialY,
                vx: (Math.random() - 0.5) * 2 * speedMultiplier,
                vy: 0,
                size: size
            });
        }

        function checkCollision(ball1, ball2) {
            const dx = ball2.x - ball1.x;
            const dy = ball2.y - ball1.y;
            const distance = Math.sqrt(dx * dx + dy * dy);
            return distance < (ball1.size + ball2.size) / 2;
        }

        function handleCollision(ball1, ball2) {
            const dx = ball2.x - ball1.x;
            const dy = ball2.y - ball1.y;
            const distance = Math.sqrt(dx * dx + dy * dy);
            const normalX = dx / distance;
            const normalY = dy / distance;

            const v1n = ball1.vx * normalX + ball1.vy * normalY;
            const v2n = ball2.vx * normalX + ball2.vy * normalY;
            const v1t = ball1.vx - v1n * normalX;
            const v2t = ball2.vx - v2n * normalX;

            const m1 = ball1.size;
            const m2 = ball2.size;

            const v1nNew = (v1n * (m1 - m2) + 2 * m2 * v2n) / (m1 + m2);
            const v2nNew = (v2n * (m2 - m1) + 2 * m1 * v1n) / (m1 + m2);

            // 应用能量损耗
            ball1.vx = (v1t + v1nNew * normalX) * collisionEnergyLoss;
            ball1.vy = (v1t + v1nNew * normalY) * collisionEnergyLoss;
            ball2.vx = (v2t + v2nNew * normalX) * collisionEnergyLoss;
            ball2.vy = (v2t + v2nNew * normalY) * collisionEnergyLoss;

            // 将小球稍微分开，避免重叠
            const overlap = (ball1.size + ball2.size) / 2 - distance;
            ball1.x -= overlap * 0.5 * normalX;
            ball1.y -= overlap * 0.5 * normalY;
            ball2.x += overlap * 0.5 * normalX;
            ball2.y += overlap * 0.5 * normalY;
        }

        function updatePhysics() {
            for (let i = balls.length - 1; i >= 0; i--) {
                const ball = balls[i];
                ball.vx += windStrength * speedMultiplier;
                ball.vy += gravity * speedMultiplier;
                ball.x += ball.vx;
                ball.y += ball.vy;

                if (ball.x < 0) {
                    ball.x = 0;
                    ball.vx = -ball.vx;
                } else if (ball.x > containerWidth - ball.size) {
                    ball.x = containerWidth - ball.size;
                    ball.vx = -ball.vx;
                }

                if (ball.y > containerHeight - ball.size) {
                    ball.y = containerHeight - ball.size;
                    ball.vy = -ball.vy * 0.8;
                    if (Math.abs(ball.vy) < 0.5) {
                        ball.vy = 0;
                    }
                }

                ball.element.style.transform = `translate(${ball.x}px, ${ball.y}px)`;
            }

            for (let i = 0; i < balls.length; i++) {
                for (let j = i + 1; j < balls.length; j++) {
                    if (checkCollision(balls[i], balls[j])) {
                        handleCollision(balls[i], balls[j]);
                    }
                }
            }
        }

        function animate() {
            if (!isPaused) {
                updatePhysics();
            }
            animationFrameId = requestAnimationFrame(animate);
        }

        function clearBalls() {
            while (balls.length > 0) {
                const ball = balls.pop();
                animationContainer.removeChild(ball.element);
            }
        }

        function simulateWind() {
            windStrength = (Math.random() - 0.5) * 0.2;

            if (!windEffect) {
                windEffect = document.createElement('div');
                windEffect.className = 'wind-effect';
                animationContainer.appendChild(windEffect);
            }

            windEffect.style.opacity = 1;

            setTimeout(() => {
                windEffect.style.opacity = 0;
            }, 3000);
        }

        function clearWind() {
            windStrength = 0;
            if (windEffect) {
                windEffect.style.opacity = 0;
            }
        }

        function resetAnimation() {
            clearBalls();
            clearWind();
            isPaused = true;
            speedMultiplier = 1;
            if (windEffect) {
                animationContainer.removeChild(windEffect);
                windEffect = null;
            }
            createBall();
            isPaused = false;
        }

        document.getElementById('add-ball').addEventListener('click', createBall);
        document.getElementById('start-animation').addEventListener('click', () => {
            if (isPaused) {
                isPaused = false;
                if (!animationFrameId) animate();
            }
        });
        document.getElementById('pause-animation').addEventListener('click', () => {
            isPaused = true;
        });
        document.getElementById('increase-speed').addEventListener('click', () => {
            speedMultiplier = Math.min(speedMultiplier * 1.2, 5);
        });
        document.getElementById('clear-balls').addEventListener('click', clearBalls);
        document.getElementById('simulate-wind').addEventListener('click', simulateWind);
        document.getElementById('clear-wind').addEventListener('click', clearWind);
        document.getElementById('reset-animation').addEventListener('click', resetAnimation);

        createBall();
        animate();
    </script>
</body>

</html>
  • 标题: 基于js的重力模拟研究
  • 作者: YQYStudio(一个为人民服务的公仆)
  • 创建于 : 2025-02-09 22:48:23
  • 更新于 : 2025-09-09 22:53:10
  • 链接: https://yqystudio-github-io.pages.dev/2025/02/09/基于js的重力模拟研究/
  • 版权声明: 本文章采用 CC BY-NC-SA 4.0 进行许可。
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基于js的重力模拟研究