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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,118 +1,127 @@ | ||
| var LetItSnow = function(element) { | ||
| this._parent = element; | ||
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| this._canvas = document.createElement("canvas"); | ||
| this.resize(); | ||
| (function () { | ||
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| this._canvas.style.zIndex = -1; | ||
| this._canvas.style.position = "absolute"; | ||
| this._canvas.style.top = this._canvas.style.left = this._canvas.style.right = this._canvas.style.bottom = 0; | ||
| function LetItSnow(element) { | ||
| this._parent = element; | ||
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| this._canvas.style.background = window | ||
| .getComputedStyle(this._parent) | ||
| .getPropertyValue("background-color"); | ||
| this._parent.style.background = "transparent"; | ||
| this._canvas = document.createElement("canvas"); | ||
| var canvas = this._canvas; | ||
| this.resize(); | ||
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| // Append the canvas... | ||
| if(this._parent.children.length > 0) { // As first element if there is other children | ||
| this._parent.insertBefore(this._canvas, this._parent.children[0]); | ||
| } | ||
| else { | ||
| this._parent.appendChild(this._canvas); | ||
| canvas.style.zIndex = -1; | ||
| canvas.style.position = "absolute"; | ||
| canvas.style.top = | ||
| canvas.style.left = | ||
| canvas.style.right = | ||
| canvas.style.bottom = 0; | ||
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| canvas.style.background = window | ||
| .getComputedStyle(this._parent) | ||
| .getPropertyValue("background-color"); | ||
| this._parent.style.background = "transparent"; | ||
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| // Append the canvas... | ||
| if(this._parent.children.length > 0) { // As first element if there is other children | ||
| this._parent.insertBefore(canvas, this._parent.children[0]); | ||
| } | ||
| else { | ||
| this._parent.appendChild(canvas); | ||
| } | ||
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| this._ctx = canvas.getContext("2d"); | ||
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| this.setup(); | ||
| } | ||
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| this._ctx = this._canvas.getContext("2d"); | ||
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| this.setup(); | ||
| }; | ||
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| LetItSnow.prototype = { | ||
| PARTICLES_COLOR: "rgba(255, 255, 255, 0.8)", // Color | ||
| MAX_PARTICLES: 25, // Particles limits | ||
| SPAWN_RATE: 100, // time (ms) between two particles spawns | ||
| PARTICLES_SPEED: 15, // Base speed | ||
| PARTICLES_SIZE: 2, // Base size | ||
| TURBULENCES_X: 1, // Turbulences amount (X) | ||
| TURBULENCES_Y: 0.5, // Turbulences amount (Y) | ||
| TURBULENCES_SPEED: 1, // Turbulences speed | ||
| MAX_TIMESHIFT: Math.PI / 3, // Max time shifting (turbulences) between two particles | ||
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| setup: function() { | ||
| this.particles = []; | ||
| this._lastSpawn = this._lastLoop = Date.now(); | ||
| this.loop(); | ||
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| window.addEventListener("resize", this.resize.bind(this)); | ||
| }, | ||
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| resize: function() { | ||
| var rect = this._parent.getBoundingClientRect(); | ||
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| this.H = rect.height; | ||
| this.W = rect.width; | ||
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| this._canvas.height = this.H; | ||
| this._canvas.width = this.W; | ||
| }, | ||
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| spawnParticle: function() { | ||
| this.particles.push({ | ||
| x: Math.random() * this.W, | ||
| y: - this.PARTICLES_SIZE, | ||
| d: Math.random() + 1, // Density (affects speed and size) | ||
| s: Math.random() * this.MAX_TIMESHIFT // Time shift | ||
| }); | ||
| }, | ||
|
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| loop: function() { | ||
| this.update(); | ||
| this.draw(); | ||
|
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| requestAnimationFrame(this.loop.bind(this)); | ||
| }, | ||
|
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| update: function() { | ||
| var p, now = Date.now(), delta = now - this._lastLoop; | ||
| for(var i in this.particles) { | ||
| p = this.particles[i]; | ||
| p.y += (delta / 1000) * (this.PARTICLES_SPEED * p.d * (1.5 + Math.sin(now * this.TURBULENCES_SPEED / 1000 + p.s) * this.TURBULENCES_Y)); | ||
| p.x += (delta / 1000) * (this.PARTICLES_SPEED * p.d * (Math.cos(now * this.TURBULENCES_SPEED / 1000 + p.s) * this.TURBULENCES_X)); | ||
|
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| if(p.y - (p.d * 4) > this.H || p.x - (p.d * 4) > this.W || p.x + (p.d * 4) < 0) { | ||
| this.particles.splice(i, 1); | ||
| LetItSnow.prototype = { | ||
| PARTICLES_COLOR: "rgba(255, 255, 255, 0.8)", // Color | ||
| MAX_PARTICLES: 25, // Particles limits | ||
| SPAWN_RATE: 100, // time (ms) between two particles spawns | ||
| PARTICLES_SPEED: 15, // Base speed | ||
| PARTICLES_SIZE: 2, // Base size | ||
| TURBULENCES_X: 1, // Turbulences amount (X) | ||
| TURBULENCES_Y: 0.5, // Turbulences amount (Y) | ||
| TURBULENCES_SPEED: 1, // Turbulences speed | ||
| MAX_TIMESHIFT: Math.PI / 3, // Max time shifting (turbulences) between two particles | ||
|
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||
| setup: function() { | ||
| this.particles = []; | ||
| this._lastSpawn = this._lastLoop = Date.now(); | ||
| this.loop(); | ||
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| window.addEventListener("resize", this.resize.bind(this)); | ||
| }, | ||
|
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| resize: function() { | ||
| var rect = this._parent.getBoundingClientRect(); | ||
|
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| this.H = rect.height; | ||
| this.W = rect.width; | ||
|
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| this._canvas.height = this.H; | ||
| this._canvas.width = this.W; | ||
| }, | ||
|
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| spawnParticle: function() { | ||
| this.particles.push({ | ||
| x: Math.random() * this.W, | ||
| y: - this.PARTICLES_SIZE, | ||
| d: Math.random() + 1, // Density (affects speed and size) | ||
| s: Math.random() * this.MAX_TIMESHIFT // Time shift | ||
| }); | ||
| }, | ||
|
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| loop: function() { | ||
| this.update(); | ||
| this.draw(); | ||
|
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| requestAnimationFrame(this.loop.bind(this)); | ||
| }, | ||
|
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| update: function() { | ||
| var p, now = Date.now(), delta = now - this._lastLoop; | ||
| for(var i in this.particles) { | ||
| p = this.particles[i]; | ||
| p.y += (delta / 1000) * (this.PARTICLES_SPEED * p.d * (1.5 + Math.sin(now * this.TURBULENCES_SPEED / 1000 + p.s) * this.TURBULENCES_Y)); | ||
| p.x += (delta / 1000) * (this.PARTICLES_SPEED * p.d * (Math.cos(now * this.TURBULENCES_SPEED / 1000 + p.s) * this.TURBULENCES_X)); | ||
|
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| if(p.y - (p.d * 4) > this.H || p.x - (p.d * 4) > this.W || p.x + (p.d * 4) < 0) { | ||
| this.particles.splice(i, 1); | ||
| } | ||
| } | ||
| } | ||
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| if(this._lastSpawn <= now - this.SPAWN_RATE && this.particles.length < this.MAX_PARTICLES) { | ||
| this._lastSpawn = now; | ||
| this.spawnParticle(); | ||
| } | ||
| if(this._lastSpawn <= now - this.SPAWN_RATE && this.particles.length < this.MAX_PARTICLES) { | ||
| this._lastSpawn = now; | ||
| this.spawnParticle(); | ||
| } | ||
|
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| this._lastLoop = now; | ||
| }, | ||
| this._lastLoop = now; | ||
| }, | ||
|
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| draw: function() { | ||
| this._ctx.clearRect(0, 0, this.W, this.H); | ||
| draw: function() { | ||
| this._ctx.clearRect(0, 0, this.W, this.H); | ||
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| this._ctx.fillStyle = this.PARTICLES_COLOR; | ||
| this._ctx.beginPath(); | ||
| this._ctx.fillStyle = this.PARTICLES_COLOR; | ||
| this._ctx.beginPath(); | ||
|
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| var p; | ||
| for(var i in this.particles) { | ||
| p = this.particles[i]; | ||
| var p; | ||
| for(var i in this.particles) { | ||
| p = this.particles[i]; | ||
|
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| this._ctx.moveTo(p.x, p.y); | ||
| this._ctx.arc(p.x, p.y, p.d * this.PARTICLES_SIZE, 0, Math.PI*2, true); | ||
| } | ||
|
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| this._ctx.moveTo(p.x, p.y); | ||
| this._ctx.arc(p.x, p.y, p.d * this.PARTICLES_SIZE, 0, Math.PI*2, true); | ||
| this._ctx.fill(); | ||
| } | ||
| }; | ||
|
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| this._ctx.fill(); | ||
| } | ||
| }; | ||
| window.addEventListener("DOMContentLoaded", function() { | ||
| if (document.body.className.split(" ").indexOf("vc-snow") !== -1) { // No jQuery here | ||
| setTimeout(function() { | ||
| window.snow = new LetItSnow(document.querySelector(".header-container > header")); | ||
| }, 1000); // to be sure to have the DOM completely ready | ||
| } | ||
| }); | ||
|
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| window.addEventListener("DOMContentLoaded", function() { | ||
| if(document.body.className.split(" ").indexOf("vc-snow") !== -1) { // No jQuery here | ||
| setTimeout(function() { | ||
| window.snow = new LetItSnow(document.querySelector(".header-container > header")); | ||
| }, 1000); // to be sure to have the DOM completely ready | ||
| } | ||
| }); | ||
| })(); |