Жидкая кнопка
Генератор жидких кнопок на canvas
CSS
html,
body {
margin: 0;
padding: 0;
}
canvas {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
JS
Библиотека для панели настроекhttps://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.6.4/dat.gui.min.jsconst LiquidButton = class LiquidButton {
constructor(optionsParam) {
const options = optionsParam || {};
this.tension = options.tension || 0.4;
this.width = options.width || 200;
this.height = options.width || 50;
this.margin = options.margin || 50;
this.padding = options.padding || 17;
this.hoverFactor = options.hoverFactor || -0.1;
this.gap = options.gap || 5;
this.debug = options.debug || false;
this.forceFactor = options.forceFactor || 0.2;
this.color1 = options.color1 || '#36DFE7';
this.color2 = options.color2 || '#8F17E1';
this.color3 = options.color3 || '#E509E6';
this.textColor = options.textColor || '#FFFFFF';
this.layers = [{
points: [],
viscosity: 0.5,
mouseForce: 100,
forceLimit: 2,
},{
points: [],
viscosity: 0.8,
mouseForce: 150,
forceLimit: 3,
}];
this.text = options.text || '▶';
this.canvas = options.canvas || document.createElement('canvas');
this.context = this.canvas.getContext('2d');
this.wrapperElement = options.wrapperElement || document.body;
if (!this.canvas.parentElement) {
this.wrapperElement.append(this.canvas);
}
this.touches = [];
this.noise = options.noise || 0;
this.canvas.addEventListener('mousemove', this.mousemove);
this.canvas.addEventListener('mouseout', this.mouseout);
this.initOrigins();
this.animate();
}
get mousemove() {
return (e) => {
this.touches = [{
x: e.offsetX,
y: e.offsetY,
z: 0,
force: 1,
}];
};
}
get mouseout() {
return (e) => {
this.touches = [];
};
}
get raf() {
return this.__raf || (this.__raf = (
window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
function(callback){ setTimeout(callback, 10)}
).bind(window));
}
distance(p1, p2) {
return Math.sqrt(Math.pow(p1.x - p2.x, 2) + Math.pow(p1.y - p2.y, 2));
}
update() {
for (let layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {
const layer = this.layers[layerIndex];
const points = layer.points;
for (let pointIndex = 0; pointIndex < points.length; pointIndex++) {
const point = points[pointIndex];
const dx = point.ox - point.x + (Math.random() - 0.5) * this.noise;
const dy = point.oy - point.y + (Math.random() - 0.5) * this.noise;
const d = Math.sqrt(dx * dx + dy * dy);
const f = d * this.forceFactor;
point.vx += f * ((dx / d) || 0);
point.vy += f * ((dy / d) || 0);
for (let touchIndex = 0; touchIndex < this.touches.length; touchIndex++) {
const touch = this.touches[touchIndex];
let mouseForce = layer.mouseForce;
if (
touch.x > this.margin &&
touch.x < this.margin + this.width &&
touch.y > this.margin &&
touch.y < this.margin + this.height
) {
mouseForce *= -this.hoverFactor;
}
const mx = point.x - touch.x;
const my = point.y - touch.y;
const md = Math.sqrt(mx * mx + my * my);
const mf = Math.max(-layer.forceLimit, Math.min(layer.forceLimit, (mouseForce * touch.force) / md));
point.vx += mf * ((mx / md) || 0);
point.vy += mf * ((my / md) || 0);
}
point.vx *= layer.viscosity;
point.vy *= layer.viscosity;
point.x += point.vx;
point.y += point.vy;
}
for (let pointIndex = 0; pointIndex < points.length; pointIndex++) {
const prev = points[(pointIndex + points.length - 1) % points.length];
const point = points[pointIndex];
const next = points[(pointIndex + points.length + 1) % points.length];
const dPrev = this.distance(point, prev);
const dNext = this.distance(point, next);
const line = {
x: next.x - prev.x,
y: next.y - prev.y,
};
const dLine = Math.sqrt(line.x * line.x + line.y * line.y);
point.cPrev = {
x: point.x - (line.x / dLine) * dPrev * this.tension,
y: point.y - (line.y / dLine) * dPrev * this.tension,
};
point.cNext = {
x: point.x + (line.x / dLine) * dNext * this.tension,
y: point.y + (line.y / dLine) * dNext * this.tension,
};
}
}
}
animate() {
this.raf(() => {
this.update();
this.draw();
this.animate();
});
}
draw() {
this.context.clearRect(0, 0, this.canvas.width, this.canvas.height);
for (let layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {
const layer = this.layers[layerIndex];
if (layerIndex === 1) {
if (this.touches.length > 0) {
const gx = this.touches[0].x;
const gy = this.touches[0].y;
layer.color = this.context.createRadialGradient(gx, gy, this.height * 2, gx, gy, 0);
layer.color.addColorStop(0, this.color2);
layer.color.addColorStop(1, this.color3);
} else {
layer.color = this.color2;
}
} else {
layer.color = this.color1;
}
const points = layer.points;
this.context.fillStyle = layer.color;
this.context.beginPath();
this.context.moveTo(points[0].x, points[0].y);
for (let pointIndex = 1; pointIndex < points.length; pointIndex += 1) {
this.context.bezierCurveTo(
points[(pointIndex + 0) % points.length].cNext.x,
points[(pointIndex + 0) % points.length].cNext.y,
points[(pointIndex + 1) % points.length].cPrev.x,
points[(pointIndex + 1) % points.length].cPrev.y,
points[(pointIndex + 1) % points.length].x,
points[(pointIndex + 1) % points.length].y
);
}
this.context.fill();
}
this.context.fillStyle = this.textColor;
this.context.font = '100 ' + (this.height - this.padding * 2) + 'px sans-serif';
this.context.textAlign = 'center';
this.context.textBaseline = 'middle';
this.context.fillText(this.text, this.canvas.width / 2, this.canvas.height / 2, this.width - this.padding * 2);
if (this.debug) {
this.drawDebug();
}
}
drawDebug() {
this.context.fillStyle = 'rgba(255, 255, 255, 0.8)';
this.context.fillRect(0, 0, this.canvas.width, this.canvas.height);
for (let layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {
const layer = this.layers[layerIndex];
const points = layer.points;
for (let pointIndex = 0; pointIndex < points.length; pointIndex++) {
if (layerIndex === 0) {
this.context.fillStyle = this.color1;
} else {
this.context.fillStyle = this.color2;
}
const point = points[pointIndex];
this.context.fillRect(point.x, point.y, 1, 1);
this.context.fillStyle = '#000';
this.context.fillRect(point.cPrev.x, point.cPrev.y, 1, 1);
this.context.fillRect(point.cNext.x, point.cNext.y, 1, 1);
this.context.strokeStyle = 'rgba(0, 0, 0, 0.33)';
this.context.strokeWidth = 0.5;
this.context.beginPath();
this.context.moveTo(point.cPrev.x, point.cPrev.y);
this.context.lineTo(point.cNext.x, point.cNext.y);
this.context.stroke();
}
}
}
createPoint(x, y) {
return {
x: x,
y: y,
ox: x,
oy: y,
vx: 0,
vy: 0,
};
}
initOrigins() {
this.canvas.width = this.width + this.margin * 2;
this.canvas.height = this.height + this.margin * 2;
for (let layerIndex = 0; layerIndex < this.layers.length; layerIndex++) {
const layer = this.layers[layerIndex];
const points = [];
for (let x = ~~(this.height / 2); x < this.width - ~~(this.height / 2); x += this.gap) {
points.push(this.createPoint(
x + this.margin,
this.margin
));
}
for (let alpha = ~~(this.height * 1.25); alpha >= 0; alpha -= this.gap) {
const angle = (Math.PI / ~~(this.height * 1.25)) * alpha;
points.push(this.createPoint(
Math.sin(angle) * this.height / 2 + this.margin + this.width - this.height / 2,
Math.cos(angle) * this.height / 2 + this.margin + this.height / 2
));
}
for (let x = this.width - ~~(this.height / 2) - 1; x >= ~~(this.height / 2); x -= this.gap) {
points.push(this.createPoint(
x + this.margin,
this.margin + this.height
));
}
for (let alpha = 0; alpha <= ~~(this.height * 1.25); alpha += this.gap) {
const angle = (Math.PI / ~~(this.height * 1.25)) * alpha;
points.push(this.createPoint(
(this.height - Math.sin(angle) * this.height / 2) + this.margin - this.height / 2,
Math.cos(angle) * this.height / 2 + this.margin + this.height / 2
));
}
layer.points = points;
}
}
}
const redraw = () => {
button.initOrigins();
};
let button = new LiquidButton();
var gui = new dat.GUI();
gui.add(button, "debug");
gui.add(button, "text");
gui.add(button, "gap", 1, 20, 1).onchange(redraw);
gui.add(button, "width", 50, 500, 1).onchange(redraw);
gui.add(button, "height", 10, 200, 1).onchange(redraw);
gui.add(button, "margin", 10, 100, 1).onchange(redraw);
gui.add(button, "padding", 0, 30, 1);
gui.add(button, "tension", 0, 1, 0.01);
gui.add(button, "forceFactor", 0, 1, 0.01);
gui.add(button, "hoverFactor", -1, 1, 0.01);
gui.addColor(button, "color1");
gui.addColor(button, "color2");
gui.addColor(button, "color3");
gui.addColor(button, "textColor");
for (let layerIndex = 0; layerIndex < button.layers.length; layerIndex++) {
const layer = button.layers[layerIndex];
const folder = gui.addFolder('Layer ' + (layerIndex + 1));
folder.add(layer, "viscosity", 0, 1, 0.01);
folder.add(layer, "mouseForce", 0, 2000, 1);
folder.add(layer, "forceLimit", 0, 200, 0.1);
folder.open();
}
if (window.innerWidth < 1000) {
gui.close();
}
