烟花代码，复制就能用，可以自定义

谁借莪１个温暖的怀抱￠ 2024-02-05 21:10 44阅读 0赞

![在这里插入图片描述][7996b197890547c0a3a75ca18e3337ef.png]

<!DOCTYPE html>
    <html lang="zh-CN">
    <meta charset="UTF-8">
        <title>烟花动画</title>
        <style>
            body, html {
           height: 100%; margin: 0; }
            canvas {
           position: absolute; }
        </style>
    </head>
    <body>
    <canvas id="fireworks"></canvas>
    <audio id="background-music" loop>
        <source src="YOUR_MUSIC_FILE.mp3" type="audio/mp3">
        Your browser does not support the audio element.
    </audio>
    <script>
        // 获取canvas和context
        const canvas = document.getElementById('fireworks');
        const ctx = canvas.getContext('2d');
        canvas.width = window.innerWidth;
        canvas.height = window.innerHeight;
    
        // Background music setup
        const backgroundMusic = document.getElementById("background-music");
        backgroundMusic.play();
    
        // 烟花粒子类
        class Particle {
          
            constructor(x, y, color, velocity, size) {
          
                this.x = x;
                this.y = y;
                this.color = color;
                this.velocity = velocity;
                this.size = size;
                this.alpha = 1;
                this.friction = 0.95;
                this.gravity = 0.03;
            }
    
            draw() {
          
                ctx.save();
                ctx.globalCompositeOperation = 'lighter';
                ctx.globalAlpha = this.alpha;
                ctx.fillStyle = this.color;
                ctx.beginPath();
                ctx.arc(this.x, this.y, this.size, 0, Math.PI * 2, false);
                ctx.closePath();
                ctx.fill();
                ctx.restore();
            }
    
            update() {
          
                this.velocity.x *= this.friction;
                this.velocity.y *= this.friction;
                this.velocity.y += this.gravity;
                this.x += this.velocity.x;
                this.y += this.velocity.y;
                this.alpha -= 0.02; // fade out
            }
        }
    
        // 烟花类
        class Firework {
          
            constructor(x, y, targetY, color, size) {
          
                this.x = x;
                this.y = y;
                this.size = size;
                this.color = color;
                this.targetY = targetY;
                this.particles = [];
                this.exploded = false;
    
                // 确定烟花升空速度
                this.velocity = {
          
                    x: 0,
                    y: -Math.random() * 3 - 9
                };
            }
    
            // 爆炸效果
            explode() {
          
                // 在这里，我们可以控制烟花爆炸后的大小和样式
                for (let i = 0; i < 500; i++) {
          
                    const angle = Math.random() * Math.PI * 2;
                    const speed = Math.random() * 6 + 1;
                    this.particles.push(new Particle(this.x, this.y, this.color, {
          
                        x: Math.cos(angle) * speed,
                        y: Math.sin(angle) * speed
                    }, this.size / 2));
                }
            }
    
            draw() {
          
                if (!this.exploded) {
          
                    ctx.save();
                    ctx.globalCompositeOperation = 'lighter';
                    ctx.globalAlpha = 0.8;
                    ctx.fillStyle = this.color;
                    ctx.beginPath();
                    ctx.arc(this.x, this.y, this.size, 0, Math.PI * 2, false);
                    ctx.closePath();
                    ctx.fill();
                    ctx.restore();
                }
                for (const particle of this.particles) {
          
                    particle.draw();
                }
            }
    
            update() {
          
                if (!this.exploded) {
          
                    this.velocity.y += 0.1; // gravity
                    this.x += this.velocity.x;
                    this.y += this.velocity.y;
    
                    // 如果达到目标高度，引发爆炸
                    if (this.y < this.targetY || this.velocity.y >= 0) {
          
                        this.exploded = true;
                        this.explode();
                    }
                }
                for (let i = this.particles.length - 1; i >= 0; i--) {
          
                    const p = this.particles[i];
                    p.update();
                    if (p.alpha <= 0) {
          
                        this.particles.splice(i, 1);
                    }
                }
            }
        }
    
        let fireworks = [];
        let timer = 0;
    
        // 生成随机颜色
        function randomColor() {
          
            const hue = Math.floor(Math.random() * 360);
            const saturation = 100; // 全饱和色彩
            const lightness = 60; // 正常亮度
            return `hsl(${ hue},${ saturation}%,${ lightness}%)`;
        }
    
        // Text configuration
        const greetings = ['家人们，新年快乐 !','祝大家','在新的一年里 !', '身体健康 !','万事如意 !','开心快乐每一天 !'];
        let currentGreeting = 0;
        let colorHue = 0;
    
        function drawText() {
          
            ctx.font = '50px Arial';
            ctx.fillStyle = `hsl(${ colorHue}, 100%, 50%)`; // HSL color value
            ctx.textAlign = 'center';
            ctx.fillText(greetings[currentGreeting], canvas.width / 2, canvas.height / 2 - 100);
        }
    
        // 更新动画
        function animate() {
          
            requestAnimationFrame(animate);
            ctx.fillStyle = 'rgba(0, 0, 0, 0.1)';
            ctx.fillRect(0, 0, canvas.width, canvas.height);
    
            if (timer % 10 === 0) {
          
                const x = Math.random() * canvas.width;
                const targetY = Math.random() * (canvas.height * 0.3) + 50;
                fireworks.push(new Firework(x, canvas.height, targetY, randomColor(), Math.random() * 4 + 1));
            }
            timer++;
    
            for (let i = fireworks.length - 1; i >= 0; i--) {
          
                fireworks[i].update();
                fireworks[i].draw();
                if (fireworks[i].exploded && fireworks[i].particles.length === 0) {
          
                    fireworks.splice(i, 1);
                }
            }
            // Update text color and content
            colorHue += 1; // Change color
            if (colorHue > 360) {
           colorHue = 0; } // Reset color loop
            if (timer % 300 === 0) {
           // Change text every few seconds
                currentGreeting = (currentGreeting + 1) % greetings.length;
            }
            // 绘制文字
            drawText();
        }
    
        // 适应屏幕尺寸变化
        window.addEventListener('resize', function() {
          
            canvas.width = window.innerWidth;
            canvas.height = window.innerHeight;
        });
    
        animate();
    </script>
    </body>
    </html>

[7996b197890547c0a3a75ca18e3337ef.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/30/f3373b281c494e499667327b33afe904.png