click to transform immediately
Created
November 5, 2018 16:20
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deformable particles
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<div id="jsi-particle-container" class="container"></div> |
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var RENDERER = { | |
PARTICLE_COUNT : 1500, | |
PARTICLE_RADIUS : 1, | |
MAX_ROTATION_ANGLE : Math.PI / 60, | |
TRANSLATION_COUNT : 500, | |
init : function(strategy){ | |
this.setParameters(strategy); | |
this.createParticles(); | |
this.setupFigure(); | |
this.reconstructMethod(); | |
this.bindEvent(); | |
this.drawFigure(); | |
}, | |
setParameters : function(strategy){ | |
this.$window = $(window); | |
this.$container = $('#jsi-particle-container'); | |
this.width = this.$container.width(); | |
this.height = this.$container.height(); | |
this.$canvas = $('<canvas />').attr({width : this.width, height : this.height}).appendTo(this.$container); | |
this.context = this.$canvas.get(0).getContext('2d'); | |
this.center = {x : this.width / 2, y : this.height / 2}; | |
this.rotationX = this.MAX_ROTATION_ANGLE; | |
this.rotationY = this.MAX_ROTATION_ANGLE; | |
this.strategyIndex = 0; | |
this.translationCount = 0; | |
this.theta = 0; | |
this.strategies = strategy.getStrategies(); | |
this.particles = []; | |
}, | |
createParticles : function(){ | |
for(var i = 0; i < this.PARTICLE_COUNT; i ++){ | |
this.particles.push(new PARTICLE(this.center)); | |
} | |
}, | |
reconstructMethod : function(){ | |
this.setupFigure = this.setupFigure.bind(this); | |
this.drawFigure = this.drawFigure.bind(this); | |
this.changeAngle = this.changeAngle.bind(this); | |
}, | |
bindEvent : function(){ | |
this.$container.on('click', this.setupFigure); | |
this.$container.on('mousemove', this.changeAngle); | |
}, | |
changeAngle : function(event){ | |
var offset = this.$container.offset(), | |
x = event.clientX - offset.left + this.$window.scrollLeft(), | |
y = event.clientY - offset.top + this.$window.scrollTop(); | |
this.rotationX = (this.center.y - y) / this.center.y * this.MAX_ROTATION_ANGLE; | |
this.rotationY = (this.center.x - x) / this.center.x * this.MAX_ROTATION_ANGLE; | |
}, | |
setupFigure : function(){ | |
for(var i = 0, length = this.particles.length; i < length; i++){ | |
this.particles[i].setAxis(this.strategies[this.strategyIndex]()); | |
} | |
if(++this.strategyIndex == this.strategies.length){ | |
this.strategyIndex = 0; | |
} | |
this.translationCount = 0; | |
}, | |
drawFigure : function(){ | |
requestAnimationFrame(this.drawFigure); | |
this.context.fillStyle = 'rgba(0, 0, 0, 0.2)'; | |
this.context.fillRect(0, 0, this.width, this.height); | |
for(var i = 0, length = this.particles.length; i < length; i++){ | |
var axis = this.particles[i].getAxis2D(this.theta); | |
this.context.beginPath(); | |
this.context.fillStyle = axis.color; | |
this.context.arc(axis.x, axis.y, this.PARTICLE_RADIUS, 0, Math.PI * 2, false); | |
this.context.fill(); | |
} | |
this.theta++; | |
this.theta %= 360; | |
for(var i = 0, length = this.particles.length; i < length; i++){ | |
this.particles[i].rotateX(this.rotationX); | |
this.particles[i].rotateY(this.rotationY); | |
} | |
this.translationCount++; | |
this.translationCount %= this.TRANSLATION_COUNT; | |
if(this.translationCount == 0){ | |
this.setupFigure(); | |
} | |
} | |
}; | |
var STRATEGY = { | |
SCATTER_RADIUS :150, | |
CONE_ASPECT_RATIO : 1.5, | |
RING_COUNT : 5, | |
getStrategies : function(){ | |
var strategies = []; | |
for(var i in this){ | |
if(this[i] == arguments.callee || typeof this[i] != 'function'){ | |
continue; | |
} | |
strategies.push(this[i].bind(this)); | |
} | |
return strategies; | |
}, | |
createSphere : function(){ | |
var cosTheta = Math.random() * 2 - 1, | |
sinTheta = Math.sqrt(1 - cosTheta * cosTheta), | |
phi = Math.random() * 2 * Math.PI; | |
return { | |
x : this.SCATTER_RADIUS * sinTheta * Math.cos(phi), | |
y : this.SCATTER_RADIUS * sinTheta * Math.sin(phi), | |
z : this.SCATTER_RADIUS * cosTheta, | |
hue : Math.round(phi / Math.PI * 30) | |
}; | |
}, | |
createTorus : function(){ | |
var theta = Math.random() * Math.PI * 2, | |
x = this.SCATTER_RADIUS + this.SCATTER_RADIUS / 6 * Math.cos(theta), | |
y = this.SCATTER_RADIUS / 6 * Math.sin(theta), | |
phi = Math.random() * Math.PI * 2; | |
return { | |
x : x * Math.cos(phi), | |
y : y, | |
z : x * Math.sin(phi), | |
hue : Math.round(phi / Math.PI * 30) | |
}; | |
}, | |
createCone : function(){ | |
var status = Math.random() > 1 / 3, | |
x, | |
y, | |
phi = Math.random() * Math.PI * 2, | |
rate = Math.tan(30 / 180 * Math.PI) / this.CONE_ASPECT_RATIO; | |
if(status){ | |
y = this.SCATTER_RADIUS * (1 - Math.random() * 2); | |
x = (this.SCATTER_RADIUS - y) * rate; | |
}else{ | |
y = -this.SCATTER_RADIUS; | |
x = this.SCATTER_RADIUS * 2 * rate * Math.random(); | |
} | |
return { | |
x : x * Math.cos(phi), | |
y : y, | |
z : x * Math.sin(phi), | |
hue : Math.round(phi / Math.PI * 30) | |
}; | |
}, | |
createVase : function(){ | |
var theta = Math.random() * Math.PI, | |
x = Math.abs(this.SCATTER_RADIUS * Math.cos(theta) / 2) + this.SCATTER_RADIUS / 8, | |
y = this.SCATTER_RADIUS * Math.cos(theta) * 1.2, | |
phi = Math.random() * Math.PI * 2; | |
return { | |
x : x * Math.cos(phi), | |
y : y, | |
z : x * Math.sin(phi), | |
hue : Math.round(phi / Math.PI * 30) | |
}; | |
} | |
}; | |
var PARTICLE = function(center){ | |
this.center = center; | |
this.init(); | |
}; | |
PARTICLE.prototype = { | |
SPRING : 0.01, | |
FRICTION : 0.9, | |
FOCUS_POSITION : 300, | |
COLOR : 'hsl(%hue, 100%, 70%)', | |
init : function(){ | |
this.x = 0; | |
this.y = 0; | |
this.z = 0; | |
this.vx = 0; | |
this.vy = 0; | |
this.vz = 0; | |
this.color; | |
}, | |
setAxis : function(axis){ | |
this.translating = true; | |
this.nextX = axis.x; | |
this.nextY = axis.y; | |
this.nextZ = axis.z; | |
this.hue = axis.hue; | |
}, | |
rotateX : function(angle){ | |
var sin = Math.sin(angle), | |
cos = Math.cos(angle), | |
nextY = this.nextY * cos - this.nextZ * sin, | |
nextZ = this.nextZ * cos + this.nextY * sin, | |
y = this.y * cos - this.z * sin, | |
z = this.z * cos + this.y * sin; | |
this.nextY = nextY; | |
this.nextZ = nextZ; | |
this.y = y; | |
this.z = z; | |
}, | |
rotateY : function(angle){ | |
var sin = Math.sin(angle), | |
cos = Math.cos(angle), | |
nextX = this.nextX * cos - this.nextZ * sin, | |
nextZ = this.nextZ * cos + this.nextX * sin, | |
x = this.x * cos - this.z * sin, | |
z = this.z * cos + this.x * sin; | |
this.nextX = nextX; | |
this.nextZ = nextZ; | |
this.x = x; | |
this.z = z; | |
}, | |
rotateZ : function(angle){ | |
var sin = Math.sin(angle), | |
cos = Math.cos(angle), | |
nextX = this.nextX * cos - this.nextY * sin, | |
nextY = this.nextY * cos + this.nextX * sin, | |
x = this.x * cos - this.y * sin, | |
y = this.y * cos + this.x * sin; | |
this.nextX = nextX; | |
this.nextY = nextY; | |
this.x = x; | |
this.y = y; | |
}, | |
getAxis3D : function(){ | |
this.vx += (this.nextX - this.x) * this.SPRING; | |
this.vy += (this.nextY - this.y) * this.SPRING; | |
this.vz += (this.nextZ - this.z) * this.SPRING; | |
this.vx *= this.FRICTION; | |
this.vy *= this.FRICTION; | |
this.vz *= this.FRICTION; | |
this.x += this.vx; | |
this.y += this.vy; | |
this.z += this.vz; | |
return {x : this.x, y : this.y, z : this.z}; | |
}, | |
getAxis2D : function(theta){ | |
var axis = this.getAxis3D(), | |
scale = this.FOCUS_POSITION / (this.FOCUS_POSITION + axis.z); | |
return {x : this.center.x + axis.x * scale, y : this.center.y - axis.y * scale, color : this.COLOR.replace('%hue', this.hue + theta)}; | |
} | |
}; | |
$(function(){ | |
RENDERER.init(STRATEGY); | |
}); |
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<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script> |
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html,body { | |
width: 100%; | |
height: 100%; | |
margin: 0; | |
padding: 0; | |
overflow: hidden; | |
} | |
.container{ | |
width: 100%; | |
height: 100%; | |
margin: 0; | |
padding: 0; | |
background-color: #000000; | |
} |
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