4th of July Fireworks

Developer
Loktar
Size
3,156 Kb
Views
22,264
  1. 4th of July Fireworks Previews
  2. 4th of July Fireworks HTML Codes
  3. 4th of July Fireworks CSS Codes
  4. 4th of July Fireworks JS Codes

How do I make an 4th of july fireworks?

Quick pen in celebration of the 4th of July!. What is a 4th of july fireworks? How do you make a 4th of july fireworks? This script and codes were developed by Loktar on 20 August 2022, Saturday.

4th of July Fireworks Previews
IQ Test

4th of July Fireworks - Script Codes HTML Codes

<!DOCTYPE html>
<html >
<head> <meta charset="UTF-8"> <title>4th of July Fireworks</title> <link rel="stylesheet" href="css/style.css">
</head>
<body> <canvas id="canvas"></canvas> <script src="js/index.js"></script>
</body>
</html>

4th of July Fireworks - Script Codes CSS Codes

body, html { background-color: #000; color: #fff; width: 100%; height: 100%; margin: 0; padding: 0; overflow: hidden;
}
canvas { position:absolute; top:0; left:0
}

4th of July Fireworks - Script Codes JS Codes

(function () { var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame; window.requestAnimationFrame = requestAnimationFrame;
})();
var canvas = document.getElementById("canvas"), ctx = canvas.getContext("2d"), width = 0, height = 0, vanishPointY = 0, vanishPointX = 0, focalLength = 300, angleX = 180, angleY = 180, angleZ = 180, angle = 0, cycle = 0, colors = {r : 255, g : 0, b : 0}, lastShot = new Date().getTime();
canvas.width = width;
canvas.height = height;
/* *	Controls the emitter */
function Emitter() { this.reset();
}
Emitter.prototype.reset = function () { var PART_NUM = 200, x = (Math.random() * 400) - 200, y = (Math.random() * 400) - 200, z = (Math.random() * 800) - 200; this.x = x || 0; this.y = y || 0; this.z = z || 0; var color = [~~(Math.random() * 150) + 10, ~~(Math.random() * 150) + 10, ~~(Math.random() * 150) + 10] this.particles = []; for (var i = 0; i < PART_NUM; i++) { this.particles.push(new Particle(this.x, this.y, this.z, { r: colors.r, g: colors.g, b: colors.b })); }
}
Emitter.prototype.update = function () { var partLen = this.particles.length; angleY = (angle - vanishPointX) * 0.0001; angleX = (angle - vanishPointX) * 0.0001; this.particles.sort(function (a, b) { return b.z - a.z; }); for (var i = 0; i < partLen; i++) { this.particles[i].update(); } if(this.particles.length <= 0){ this.reset(); }
};
Emitter.prototype.render = function (imgData) { var data = imgData.data; for (i = 0; i < this.particles.length; i++) { var particle = this.particles[i], dist = Math.sqrt((particle.x - particle.ox) * (particle.x - particle.ox) + (particle.y - particle.oy) * (particle.y - particle.oy) + (particle.z - particle.oz) * (particle.z - particle.oz)); if (dist > 255) { particle.render = false; this.particles.splice(i, 1); this.particles.length--; } if (particle.render && particle.xPos < width && particle.xPos > 0 && particle.yPos > 0 && particle.yPos < height) { for (w = 0; w < particle.size; w++) { for (h = 0; h < particle.size; h++) { if (particle.xPos + w < width && particle.xPos + w > 0 && particle.yPos + h > 0 && particle.yPos + h < height) { pData = (~~ (particle.xPos + w) + (~~ (particle.yPos + h) * width)) * 4; data[pData] = particle.color[0]; data[pData + 1] = particle.color[1]; data[pData + 2] = particle.color[2]; data[pData + 3] = 255 - dist; } } } } }
};
/* *	Controls the individual particles */
function Particle(x, y, z, color) { this.x = x; this.y = y; this.z = z; this.startX = this.x; this.startY = this.y; this.startZ = this.z; this.ox = this.x; this.oy = this.y; this.oz = this.z; this.xPos = 0; this.yPos = 0; this.vx = (Math.random() * 10) - 5; this.vy = (Math.random() * 10) - 5; this.vz = (Math.random() * 10) - 5; this.color = [color.r, color.g, color.b]; this.render = true; this.size = Math.round(1 + Math.random() * 1);
}
Particle.prototype.rotate = function () { var x = this.startX * Math.cos(angleZ) - this.startY * Math.sin(angleZ), y = this.startY * Math.cos(angleZ) + this.startX * Math.sin(angleZ); this.x = x; this.y = y;
}
Particle.prototype.update = function () { var cosY = Math.cos(angleX), sinY = Math.sin(angleX); this.x = (this.startX += this.vx); this.y = (this.startY += this.vy); this.z = (this.startZ -= this.vz); this.rotate(); this.vy += 0.1; this.x += this.vx; this.y += this.vy; this.z -= this.vz; this.render = false; if (this.z > -focalLength) { var scale = focalLength / (focalLength + this.z); this.size = scale * 2; this.xPos = vanishPointX + this.x * scale; this.yPos = vanishPointY + this.y * scale; this.render = true; }
};
function render() { colorCycle(); angleY = Math.sin(angle += 0.01); angleX = Math.sin(angle); angleZ = Math.sin(angle); var imgData = ctx.createImageData(width, height); for (var e = 0; e < 30; e++) { emitters[e].update(); emitters[e].render(imgData); } ctx.putImageData(imgData, 0, 0); requestAnimationFrame(render);
}
function colorCycle() { cycle += .6; if (cycle > 100) { cycle = 0; } colors.r = ~~ (Math.sin(.3 * cycle + 0) * 127 + 128); colors.g = ~~ (Math.sin(.3 * cycle + 2) * 127 + 128); colors.b = ~~ (Math.sin(.3 * cycle + 4) * 127 + 128);
}
var emitters = [];
for (var e = 0; e < 30; e++) { colorCycle(); emitters.push(new Emitter());
}
//render();
// smart trick from @TimoHausmann for full screen pens
setTimeout(function () { width = canvas.width = window.innerWidth; height = canvas.height = document.body.offsetHeight; vanishPointY = height / 2; vanishPointX = width / 2; render();
}, 500);
4th of July Fireworks - Script Codes
4th of July Fireworks - Script Codes
Home Page Home
Developer Loktar
Username loktar00
Uploaded August 20, 2022
Rating 4.5
Size 3,156 Kb
Views 22,264
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