Mix Youtube videos like a true DJ!
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143 lines
3.3 KiB
143 lines
3.3 KiB
let sketch = function(p) { |
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let bgCol = hexToRgb('#222233'); |
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let starCol = [hexToRgb('#ffcdff'), hexToRgb('#804442'), hexToRgb('#ffff7d')] |
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let starDensity = 0.0005; //0.0005 is safe. Above 0.01 is absurd |
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let currentWidth; |
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let currentHeight; |
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let nbStars; |
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let stars; |
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let bg; |
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let time = 0; |
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p.setup = function(){ |
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p.frameRate(24); |
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currentWidth = p.windowWidth; |
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currentHeight = p.windowHeight; |
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p.createCanvas(currentWidth, currentHeight); |
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bgInit(); |
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// p.noLoop(); |
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} |
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p.draw = function(){ |
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p.background(bgCol); |
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p.image(bg, 0, 0); |
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// p.circle(30, time*1.5, 10); |
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// for (let i=0; i<nbStars; i++) { |
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// let x = p.random(p.windowWidth); |
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// let y = p.random(p.windowHeight); |
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// let d = 1 + p.random(2); |
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// let c = p.random(starCol); |
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// let a = p.random(230); |
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// c.setAlpha(a); |
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// // console.log(c); |
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// |
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// p.stroke(c); |
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// // p.point(x, y); |
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// p.circle(x, y, d); |
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// } |
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time += 1; |
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} //End of draw() |
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class Stars { |
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//Inspired by https://www.youtube.com/watch?v=NJjEGoqTn1Y |
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constructor(nb) { |
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this.nb = nb; |
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this.x = []; |
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this.y = []; |
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this.color = []; |
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this.size = []; |
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} |
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make() { |
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for (let i = 0; i < this.nb; i++) { |
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this.x[i] = p.random(0,p.width); |
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this.y[i] = p.random(0,p.height); |
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this.color[i] = p.random(starCol); |
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this.color[i].setAlpha(p.random(100,230)); |
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this.size[i] = 1 + p.random(2); |
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} |
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} |
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draw() { |
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for (let i = 0; i < this.nb; i++) { |
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bg.strokeWeight(this.size[i]); |
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bg.stroke(this.color[i]); |
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bg.point(this.x[i], this.y[i]); |
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} |
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} |
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} |
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p.windowResized = function() { |
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//Redraw only if new size if bigger than previously |
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let newWidth = p.windowWidth; |
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let newHeight = p.windowHeight; |
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if (newWidth > currentWidth || newHeight > currentHeight) { |
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currentWidth = newWidth; |
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currentHeight = newHeight; |
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p.resizeCanvas(currentWidth, currentHeight); |
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bgInit(); |
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} |
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} |
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function bgInit() { |
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nbStars = calcNumberOfStars(); |
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bg = p.createGraphics(p.width, p.height); |
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bg.background(bgCol); |
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setGradient(0, 0, p.width, p.height, bgCol, starCol[1]); |
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stars = new Stars(nbStars); |
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stars.make(); |
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stars.draw(); |
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} |
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function calcNumberOfStars() { |
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//Helps to get a consistent number of starts regardless the window size |
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if (starDensity > 0.01) { |
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console.log('starDensity is too high! going back to the maximum (0.01) in order to prevent too much CPU load when starting the patch'); |
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starDensity = 0.01; |
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} |
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let nb = p.round(starDensity * currentWidth * currentHeight) |
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console.log('nbStars: ' + nb); |
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return nb; |
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} |
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function hexToRgb(hex) { |
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hex = hex.replace('#', ''); |
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var bigint = parseInt(hex, 16); |
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var r = (bigint >> 16) & 255; |
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var g = (bigint >> 8) & 255; |
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var b = bigint & 255; |
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return p.color(r, g, b); |
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} |
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function setGradient(x, y, w, h, c1, c2) { |
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bg.noFill(); |
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// Top to bottom gradient |
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for (let i = y; i <= y + h; i++) { |
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let inter = p.pow(p.map(i, y, y + h, 0, 1),6); |
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let c = bg.lerpColor(c1, c2, inter); |
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bg.stroke(c); |
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bg.line(x, i, x + w, i); |
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} |
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} |
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}; |
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new p5(sketch, 'bg');
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