cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

Quick-add: + add another resource

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

Quick-add: + add another resource

Code Indentation

     

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

            
                              <canvas></canvas>
<!-- 
                  ,--.    ,--.
                 ((O ))--((O ))
               ,'_`--'____`--'_`.
              _:  ____________  :_
             | | ||::::::::::|| | |
             | | ||::::::::::|| | |
             | | ||::::::::::|| | |
             |_| |/__________\| |_|
               |________________|
            __..-'            `-..__
         .-| : .----------------. : |-.
       ,\ || | |\______________/| | || /.
      /`.\:| | ||  __  __  __  || | |;/,'\
     :`-._\;.| || '--''--''--' || |,:/_.-':
     |    :  | || .----------. || |  :    |
     |    |  | || '----SSt---' || |  |    |
     |    |  | ||   _   _   _  || |  |    |
     :,--.;  | ||  (_) (_) (_) || |  :,--.;
     (`-'|)  | ||______________|| |  (|`-')
      `--'   | |/______________\| |   `--'
             |____________________|
              `.________________,'
               (_______)(_______)
               (_______)(_______)
               (_______)(_______)
               (_______)(_______)
              |        ||        |
              '--------''--------'
-->
            
          
!
            
              body, html {
	position: absolute;
	margin: 0;
	padding: 0;
	width: 100%;
	height: 100%;
	overflow: hidden;
}

canvas {
	position: absolute;
	width: 100%;
	height: 100%;
	background:#000;
	cursor: pointer;
}
            
          
!
            
              {
	class Robot {
		constructor(color, light, size, x, y, struct) {
			this.x = x;
			this.points = [];
			this.links = [];
			this.frame = 0;
			this.dir = 1;
			this.size = size;
			this.color = Math.round(color);
			this.light = light;
			// ---- create points ----
			for (const p of struct.points) {
				this.points.push(new Robot.Point(size * p.x + x, size * p.y + y, p.f));
			}
			// ---- create links ----
			for (const link of struct.links) {
				const p0 = this.points[link.p0];
				const p1 = this.points[link.p1];
				const dx = p0.x - p1.x;
				const dy = p0.y - p1.y;
				this.links.push(
					new Robot.Link(
						this,
						p0,
						p1,
						Math.sqrt(dx * dx + dy * dy),
						link.size * size / 3,
						link.lum,
						link.force,
						link.disk
					)
				);
			}
		}
		update() {
			if (++this.frame % 20 === 0) this.dir = -this.dir;
			if (
				dancerDrag &&
				this === dancerDrag &&
				this.size < 16 &&
				this.frame > 600
			) {
				dancerDrag = null;
				dancers.push(
					new Robot(
						this.color,
						this.light * 1.25,
						this.size * 2,
						pointer.x,
						pointer.y - 100 * this.size * 2,
						struct
					)
				);
				dancers.sort(function(d0, d1) {
					return d0.size - d1.size;
				});
			}
			// ---- update links ----
			for (const link of this.links) {
				const p0 = link.p0;
				const p1 = link.p1;
				const dx = p0.x - p1.x;
				const dy = p0.y - p1.y;
				const dist = Math.sqrt(dx * dx + dy * dy);
				if (dist) {
					const tw = p0.w + p1.w;
					const r1 = p1.w / tw;
					const r0 = p0.w / tw;
					const dz = (link.distance - dist) * link.force;
					const sx = dx / dist * dz;
					const sy = dy / dist * dz;
					p1.x -= sx * r0;
					p1.y -= sy * r0;
					p0.x += sx * r1;
					p0.y += sy * r1;
				}
			}
			// ---- update points ----
			for (const point of this.points) {
				// ---- dragging ----
				if (this === dancerDrag && point === pointDrag) {
					point.x += (pointer.x - point.x) * 0.1;
					point.y += (pointer.y - point.y) * 0.1;
				}
				// ---- dance ----
				if (this !== dancerDrag) {
					point.fn && point.fn(16 * Math.sqrt(this.size), this.dir);
				}
				// ---- verlet integration ----
				point.vx = point.x - point.px;
				point.vy = point.y - point.py;
				point.px = point.x;
				point.py = point.y;
				point.vx *= 0.995;
				point.vy *= 0.995;
				point.x += point.vx;
				point.y += point.vy + 0.01;
			}
			// ---- ground ----
			for (const link of this.links) {
				const p1 = link.p1;
				if (p1.y > canvas.height * ground - link.size * 0.5) {
					p1.y = canvas.height * ground - link.size * 0.5;
					p1.x -= p1.vx;
					p1.vx = 0;
					p1.vy = 0;
				}
			}
			// ---- center position ----
			const delta = (this.x - this.points[0].x) * 0.0002;
			this.points[9].x += delta;
			this.points[10].x += delta;
		}
		draw() {
			for (const link of this.links) {
				if (link.size) {
					const dx = link.p1.x - link.p0.x;
					const dy = link.p1.y - link.p0.y;
					const a = Math.atan2(dy, dx);
					const d = Math.sqrt(dx * dx + dy * dy);
					// ---- shadow ----
					ctx.save();
					ctx.translate(link.p0.x + link.size * 0.25, link.p0.y + link.size * 0.25);
					ctx.rotate(a);
					ctx.drawImage(
						link.shadow,
						-link.size * 0.5,
						-link.size * 0.5,
						d + link.size,
						link.size
					);
					ctx.restore();
					// ---- stroke ----
					ctx.save();
					ctx.translate(link.p0.x, link.p0.y);
					ctx.rotate(a);
					ctx.drawImage(
						link.image,
						-link.size * 0.5,
						-link.size * 0.5,
						d + link.size,
						link.size
					);
					ctx.restore();
				}
			}
		}
	}
	Robot.Link = class Link {
		constructor(parent, p0, p1, dist, size, light, force, disk) {
			// ---- cache strokes ----
			function stroke(color, axis) {
				const image = document.createElement("canvas");
				image.width = dist + size;
				image.height = size;
				const ict = image.getContext("2d");
				ict.beginPath();
				ict.lineCap = "round";
				ict.lineWidth = size;
				ict.strokeStyle = color;
				if (disk) {
					ict.arc(size * 0.5 + dist, size * 0.5, size * 0.5, 0, 2 * Math.PI);
					ict.fillStyle = color;
					ict.fill();
				} else {
					ict.moveTo(size * 0.5, size * 0.5);
					ict.lineTo(size * 0.5 + dist, size * 0.5);
					ict.stroke();
				}
				if (axis) {
					const s = size / 10;
					ict.fillStyle = "#000";
					ict.fillRect(size * 0.5 - s, size * 0.5 - s, s * 2, s * 2);
					ict.fillRect(size * 0.5 - s + dist, size * 0.5 - s, s * 2, s * 2);
				}
				return image;
			}
			this.p0 = p0;
			this.p1 = p1;
			this.distance = dist;
			this.size = size;
			this.light = light || 1.0;
			this.force = force || 0.5;
			this.image = stroke(
				"hsl(" + parent.color + " ,30%, " + parent.light * this.light + "%)",
				true
			);
			this.shadow = stroke("rgba(0,0,0,0.5)");
		}
	};
	Robot.Point = class Point {
		constructor(x, y, fn, w) {
			this.x = x;
			this.y = y;
			this.w = w || 0.5;
			this.fn = fn || null;
			this.px = x;
			this.py = y;
			this.vx = 0.0;
			this.vy = 0.0;
		}
	};
	// ---- set canvas ----
	const canvas = {
		init() {
			this.elem = document.querySelector("canvas");
			this.resize();
			window.addEventListener("resize", () => this.resize(), false);
			return this.elem.getContext("2d");
		},
		resize() {
			this.width = this.elem.width = this.elem.offsetWidth;
			this.height = this.elem.height = this.elem.offsetHeight;
			ground = this.height > 500 ? 0.85 : 1.0;
			for (let i = 0; i < dancers.length; i++) {
				dancers[i].x = (i + 2) * canvas.width / 9;
			}
		}
	};
	// ---- set pointer ----
	const pointer = {
		init(canvas) {
			this.x = 0;
			this.y = 0;
			window.addEventListener("mousemove", e => this.move(e), false);
			canvas.elem.addEventListener("touchmove", e => this.move(e), false);
			window.addEventListener("mousedown", e => this.down(e), false);
			window.addEventListener("touchstart", e => this.down(e), false);
			window.addEventListener("mouseup", e => this.up(e), false);
			window.addEventListener("touchend", e => this.up(e), false);
		},
		down(e) {
			this.move(e);
			for (const dancer of dancers) {
				for (const point of dancer.points) {
					const dx = pointer.x - point.x;
					const dy = pointer.y - point.y;
					const d = Math.sqrt(dx * dx + dy * dy);
					if (d < 60) {
						dancerDrag = dancer;
						pointDrag = point;
						dancer.frame = 0;
					}
				}
			}
		},
		up(e) {
			dancerDrag = null;
		},
		move(e) {
			let touchMode = e.targetTouches,
				pointer;
			if (touchMode) {
				e.preventDefault();
				pointer = touchMode[0];
			} else pointer = e;
			this.x = pointer.clientX;
			this.y = pointer.clientY;
		}
	};
	// ---- init ----
	const dancers = [];
	let ground = 1.0;
	const ctx = canvas.init();
	pointer.init(canvas);
	let dancerDrag = null;
	let pointDrag = null;
	// ---- main loop ----
	const run = () => {
		requestAnimationFrame(run);
		ctx.clearRect(0, 0, canvas.width, canvas.height);
		ctx.fillStyle = "#222";
		ctx.fillRect(0, 0, canvas.width, canvas.height * 0.15);
		ctx.fillRect(0, canvas.height * 0.85, canvas.width, canvas.height * 0.15);
		for (const dancer of dancers) {
			dancer.update();
			dancer.draw();
		}
	};
	// ---- robot structure ----
	const struct = {
		points: [
			{
				x: 0,
				y: -4,
				f(s, d) {
					this.y -= 0.01 * s;
				}
			},
			{
				x: 0,
				y: -16,
				f(s, d) {
					this.y -= 0.02 * s * d;
				}
			},
			{
				x: 0,
				y: 12,
				f(s, d) {
					this.y += 0.02 * s * d;
				}
			},
			{ x: -12, y: 0 },
			{ x: 12, y: 0 },
			{
				x: -3,
				y: 34,
				f(s, d) {
					if (d > 0) {
						this.x += 0.01 * s;
						this.y -= 0.015 * s;
					} else {
						this.y += 0.02 * s;
					}
				}
			},
			{
				x: 3,
				y: 34,
				f(s, d) {
					if (d > 0) {
						this.y += 0.02 * s;
					} else {
						this.x -= 0.01 * s;
						this.y -= 0.015 * s;
					}
				}
			},
			{
				x: -28,
				y: 0,
				f(s, d) {
					this.x += this.vx * 0.035;
					this.y -= 0.001 * s;
				}
			},
			{
				x: 28,
				y: 0,
				f(s, d) {
					this.x += this.vx * 0.035;
					this.y -= 0.001 * s;
				}
			},
			{
				x: -3,
				y: 64,
				f(s, d) {
					this.y += 0.015 * s;
					if (d > 0) {
						this.y -= 0.01 * s;
					} else {
						this.y += 0.05 * s;
					}
				}
			},
			{
				x: 3,
				y: 64,
				f(s, d) {
					this.y += 0.015 * s;
					if (d > 0) {
						this.y += 0.05 * s;
					} else {
						this.y -= 0.01 * s;
					}
				}
			}
		],
		links: [
			{ p0: 3, p1: 7, size: 12, lum: 0.5 },
			{ p0: 1, p1: 3, size: 24, lum: 0.5 },
			{ p0: 1, p1: 0, size: 60, lum: 0.5, disk: 1 },
			{ p0: 5, p1: 9, size: 16, lum: 0.5 },
			{ p0: 2, p1: 5, size: 32, lum: 0.5 },
			{ p0: 1, p1: 2, size: 50, lum: 1 },
			{ p0: 6, p1: 10, size: 16, lum: 1.5 },
			{ p0: 2, p1: 6, size: 32, lum: 1.5 },
			{ p0: 4, p1: 8, size: 12, lum: 1.5 },
			{ p0: 1, p1: 4, size: 24, lum: 1.5 }
		]
	};
	// ---- instanciate robots ----
	for (let i = 0; i < 6; i++) {
		dancers.push(
			new Robot(
				i * 360 / 7,
				80,
				4,
				(i + 2) * canvas.width / 9,
				canvas.height * ground - 340,
				struct
			)
		);
	}
	run();
}

            
          
!
999px
Loading ..................

Console