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Improve name soup in HuesCanvas

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master
William Toohey 10 years ago
parent 238577c283
commit f73bb06ef7
1 changed files with 88 additions and 83 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 169
      js/HuesCanvas.js

169
js/HuesCanvas.js
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@ -22,9 +22,9 @@
/* Takes an element name to attach to, and an audio context element for
getting the current time with reasonable accuracy */
function HuesCanvas(element, aContext, core) {
function HuesCanvas(element, audioContext, core) {
'use strict';
this.aContext = aContext;
this.audio = audioContext;
core.addEventListener("newimage", this.setImage.bind(this));
core.addEventListener("newcolour", this.setColour.bind(this));
core.addEventListener("beat", this.beat.bind(this));
@ -73,9 +73,16 @@ function HuesCanvas(element, aContext, core) {
this.setBlurAmount("medium");
this.setBlurQuality("high");
this.setBlurDecay("fast");
this.canvas = document.getElementById(element).getContext("2d");
this.offscreenCanvas = document.createElement('canvas').getContext('2d');
this.offscreenCanvas.globalCompositeOperation = "source-over";
this.canvas = document.getElementById(element);
this.context = this.canvas.getContext("2d");
this.offCanvas = document.createElement('canvas');
this.offContext = this.offCanvas.getContext('2d');
this.snowCanvas = document.getElementById("snow");
this.snowContext = this.snowCanvas.getContext("2d");
window.addEventListener('resize', this.resize.bind(this));
this.resize();
@ -100,36 +107,35 @@ HuesCanvas.prototype.settingsUpdated = function() {
HuesCanvas.prototype.resize = function() {
// height is constant 720px, we expand width to suit
var ratio = window.innerWidth / window.innerHeight;
this.canvas.canvas.width = Math.ceil(720 * ratio);
this.offscreenCanvas.canvas.height = this.canvas.canvas.height;
this.offscreenCanvas.canvas.width = this.canvas.canvas.width;
var snow = document.getElementById("snow").getContext("2d");
snow.canvas.width = Math.ceil(720 * ratio);
this.trippyRadius = Math.max(this.canvas.canvas.width, this.canvas.canvas.height) / 2;
this.canvas.width = Math.ceil(720 * ratio);
this.offCanvas.height = this.canvas.height;
this.offCanvas.width = this.canvas.width;
this.snowCanvas.width = Math.ceil(720 * ratio);
this.trippyRadius = Math.max(this.canvas.width, this.canvas.height) / 2;
this.needsRedraw = true;
};
HuesCanvas.prototype.redraw = function() {
var offset; // for centering/right/left align
var bOpacity;
var width = this.canvas.canvas.width;
var width = this.canvas.width;
var cTime = this.aContext.currentTime;
var cTime = this.audio.currentTime;
// white BG for the hard light filter
this.canvas.globalAlpha = 1;
this.canvas.globalCompositeOperation = "source-over";
this.context.globalAlpha = 1;
this.context.globalCompositeOperation = "source-over";
if(this.blackout) {
// original is 3 frames at 30fps, this is close
bOpacity = (cTime - this.blackoutStart)*10;
if(bOpacity > 1) { // optimise the draw
this.canvas.fillStyle = this.blackoutColour;
this.canvas.fillRect(0,0,width,720);
this.context.fillStyle = this.blackoutColour;
this.context.fillRect(0,0,width,720);
this.needsRedraw = false;
return;
}
} else {
this.canvas.fillStyle = "#FFF";
this.canvas.fillRect(0,0,width,720);
this.context.fillStyle = "#FFF";
this.context.fillRect(0,0,width,720);
}
if(this.image && (this.image.bitmap || this.image.bitmaps)) {
@ -151,31 +157,31 @@ HuesCanvas.prototype.redraw = function() {
offset = width/2 - bitmap.width/2;
}
if(this.xBlur || this.yBlur) {
this.canvas.globalAlpha = this.blurAlpha;
this.context.globalAlpha = this.blurAlpha;
}
if(this.xBlur) {
if(this.blurIterations < 0) {
this.canvas.globalAlpha = 1;
this.canvas.drawImage(bitmap, Math.floor(offset - this.blurDistance/2), 0,
this.context.globalAlpha = 1;
this.context.drawImage(bitmap, Math.floor(offset - this.blurDistance/2), 0,
bitmap.width + this.blurDistance, bitmap.height);
} else {
for(var i=-1; i<=1; i+= this.blurDelta) {
this.canvas.drawImage(bitmap, Math.floor(this.blurDistance * i) + offset, 0);
this.context.drawImage(bitmap, Math.floor(this.blurDistance * i) + offset, 0);
}
}
} else if(this.yBlur) {
if(this.blurIterations < 0) {
this.canvas.globalAlpha = 1;
this.canvas.drawImage(bitmap, offset, Math.floor(-this.blurDistance/2),
this.context.globalAlpha = 1;
this.context.drawImage(bitmap, offset, Math.floor(-this.blurDistance/2),
bitmap.width, bitmap.height + this.blurDistance);
} else {
for(var i=-1; i<=1; i+= this.blurDelta) {
this.canvas.drawImage(bitmap, offset, Math.floor(this.blurDistance * i));
this.context.drawImage(bitmap, offset, Math.floor(this.blurDistance * i));
}
}
} else {
this.canvas.globalAlpha = 1;
this.canvas.drawImage(bitmap, offset, 0);
this.context.globalAlpha = 1;
this.context.drawImage(bitmap, offset, 0);
}
}
@ -186,8 +192,8 @@ HuesCanvas.prototype.redraw = function() {
var baseInvert = this.trippyStart[1] > this.trippyStart[0];
var invertC = this.intToHex(0xFFFFFF ^ this.colour);
var normalC = this.intToHex(this.colour);
this.offscreenCanvas.fillStyle = baseInvert ? invertC : normalC;
this.offscreenCanvas.fillRect(0,0,width,720);
this.offContext.fillStyle = baseInvert ? invertC : normalC;
this.offContext.fillRect(0,0,width,720);
// sort high to low
this.trippyRadii.sort(function(a,b) {
@ -200,24 +206,24 @@ HuesCanvas.prototype.redraw = function() {
continue;
}
// Invert for each subsequent draw
this.offscreenCanvas.beginPath();
this.offscreenCanvas.fillStyle = this.intToHex(invert ? invertC : normalC);
this.offscreenCanvas.arc(width/2, this.canvas.canvas.height/2, this.trippyRadii[i], 0, 2 * Math.PI, false);
this.offscreenCanvas.fill();
this.offscreenCanvas.closePath();
this.offContext.beginPath();
this.offContext.fillStyle = this.intToHex(invert ? invertC : normalC);
this.offContext.arc(width/2, this.canvas.height/2, this.trippyRadii[i], 0, 2 * Math.PI, false);
this.offContext.fill();
this.offContext.closePath();
invert = !invert;
}
} else {
this.offscreenCanvas.fillStyle = this.intToHex(this.colour);
this.offscreenCanvas.fillRect(0,0,width,720);
this.offContext.fillStyle = this.intToHex(this.colour);
this.offContext.fillRect(0,0,width,720);
}
this.canvas.globalAlpha = 0.7;
this.canvas.globalCompositeOperation = this.blendMode;
this.canvas.drawImage(this.offscreenCanvas.canvas, 0, 0);
this.context.globalAlpha = 0.7;
this.context.globalCompositeOperation = this.blendMode;
this.context.drawImage(this.offCanvas, 0, 0);
if(this.blackout) {
this.canvas.globalAlpha = bOpacity;
this.canvas.fillStyle = this.blackoutColour;
this.canvas.fillRect(0,0,width,720);
this.context.globalAlpha = bOpacity;
this.context.fillStyle = this.blackoutColour;
this.context.fillRect(0,0,width,720);
this.needsRedraw = true;
} else {
this.needsRedraw = false;
@ -233,7 +239,7 @@ HuesCanvas.prototype.intToHex = function(num) {
HuesCanvas.prototype.animationLoop = function() {
if (this.colourFade) {
var delta = this.aContext.currentTime - this.colourFadeStart;
var delta = this.audio.currentTime - this.colourFadeStart;
var fadeVal = delta / this.colourFadeLength;
if (fadeVal >= 1) {
this.stopFade();
@ -243,7 +249,7 @@ HuesCanvas.prototype.animationLoop = function() {
}
this.needsRedraw = true;
}
if(this.blackoutTimeout && this.aContext.currentTime > this.blackoutTimeout) {
if(this.blackoutTimeout && this.audio.currentTime > this.blackoutTimeout) {
this.clearBlackout();
}
if(this.image && this.image.animated){
@ -253,9 +259,9 @@ HuesCanvas.prototype.animationLoop = function() {
if(this.animFrame != a) {
this.needsRedraw = true;
// If you change to a non-synced song, this needs to be reset
this.animTimeout = this.aContext.currentTime;
this.animTimeout = this.audio.currentTime;
}
} else if(this.animTimeout < this.aContext.currentTime) {
} else if(this.animTimeout < this.audio.currentTime) {
this.animFrame++;
this.animFrame %= this.image.frameDurations.length;
// Don't rebase to current time otherwise we may lag
@ -265,7 +271,7 @@ HuesCanvas.prototype.animationLoop = function() {
}
if(this.blurStart) {
// flash offsets blur gen by a frame
var delta = this.aContext.currentTime - this.blurStart + (1/30);
var delta = this.audio.currentTime - this.blurStart + (1/30);
this.blurDistance = this.blurAmount * Math.exp(-this.blurDecay * delta);
// Update UI
@ -277,7 +283,7 @@ HuesCanvas.prototype.animationLoop = function() {
}
if(this.trippyOn && (this.trippyStart[0] || this.trippyStart[1])) {
for(var i = 0; i < 2; i++) {
this.trippyRadii[i] = Math.floor((this.aContext.currentTime - this.trippyStart[i]) * this.trippyRadius) * 2;
this.trippyRadii[i] = Math.floor((this.audio.currentTime - this.trippyStart[i]) * this.trippyRadius) * 2;
if(this.trippyRadii[i] > this.trippyRadius) {
this.trippyStart[i] = 0;
this.trippyRadii[i] = 0;
@ -323,7 +329,7 @@ HuesCanvas.prototype.setImage = function(image) {
if(image.animated) {
this.animBeat = null;
this.animFrame = 0;
this.animTimeout = this.aContext.currentTime + image.frameDurations[0]/1000;
this.animTimeout = this.audio.currentTime + image.frameDurations[0]/1000;
if(image.beatsPerAnim && this.core.currentSong && this.core.currentSong.charsPerBeat) {
this.syncAnim();
}
@ -331,7 +337,7 @@ HuesCanvas.prototype.setImage = function(image) {
};
HuesCanvas.prototype.beat = function() {
this.lastBeat = this.aContext.currentTime;
this.lastBeat = this.audio.currentTime;
};
HuesCanvas.prototype.syncAnim = function() {
@ -342,7 +348,7 @@ HuesCanvas.prototype.syncAnim = function() {
var index = this.core.beatIndex;
// When animation has more frames than song has beats, or part thereof
if(this.lastBeat && this.core.beatLength) {
var interp = (this.aContext.currentTime - this.lastBeat) / this.core.beatLength;
var interp = (this.audio.currentTime - this.lastBeat) / this.core.beatLength;
index += Math.min(interp, 1);
}
// This loops A-OK because the core's beatIndex never rolls over for a new loop
@ -378,7 +384,7 @@ HuesCanvas.prototype.doBlackout = function(whiteout) {
this.blackoutColour = "#000";
}
this.blackoutTimeout = 0; // indefinite
this.blackoutStart = this.aContext.currentTime;
this.blackoutStart = this.audio.currentTime;
this.blackout = true;
this.needsRedraw = true;
if(localStorage["blackoutUI"] == "on") {
@ -398,7 +404,7 @@ HuesCanvas.prototype.clearBlackout = function() {
HuesCanvas.prototype.doShortBlackout = function(beatTime) {
this.doBlackout();
this.blackoutTimeout = this.aContext.currentTime + beatTime / 1.7;
this.blackoutTimeout = this.audio.currentTime + beatTime / 1.7;
// looks better if we go right to black
this.blackoutStart = 0;
};
@ -406,7 +412,7 @@ HuesCanvas.prototype.doShortBlackout = function(beatTime) {
HuesCanvas.prototype.doColourFade = function(length) {
this.colourFade = true;
this.colourFadeLength = length;
this.colourFadeStart = this.aContext.currentTime;
this.colourFadeStart = this.audio.currentTime;
this.oldColour = this.colour;
};
@ -431,7 +437,7 @@ HuesCanvas.prototype.mixColours = function(percent) {
};
HuesCanvas.prototype.doXBlur = function() {
this.blurStart = this.aContext.currentTime;
this.blurStart = this.audio.currentTime;
this.trippyStart[0] = this.blurStart;
this.blurDistance = this.blurAmount;
this.xBlur = true;
@ -440,7 +446,7 @@ HuesCanvas.prototype.doXBlur = function() {
};
HuesCanvas.prototype.doYBlur = function() {
this.blurStart = this.aContext.currentTime;
this.blurStart = this.audio.currentTime;
this.trippyStart[1] = this.blurStart;
this.blurDistance = this.blurAmount;
this.xBlur = false;
@ -477,9 +483,9 @@ HuesCanvas.prototype.setAnimating = function(anim) {
HuesCanvas.prototype.startSnow = function() {
this.snowing = true;
document.getElementById("snow").style.display = "block";
var height = this.canvas.canvas.height;
var width = this.canvas.canvas.width;
this.snowCanvas.style.display = "block";
var height = this.canvas.height;
var width = this.canvas.width;
this.snowAngle = 0;
this.snowflakes = [];
for(var i = 0; i < this.maxSnow; i++) {
@ -490,58 +496,57 @@ HuesCanvas.prototype.startSnow = function() {
d: Math.random()*25 //density
});
}
this.lastSnow = this.aContext.currentTime;
this.lastSnow = this.audio.currentTime;
};
HuesCanvas.prototype.stopSnow = function() {
this.snowing = false;
document.getElementById("snow").style.display = "none";
this.snowCanvas.style.display = "none";
};
HuesCanvas.prototype.drawSnow = function() {
var ctx = document.getElementById("snow").getContext("2d");
var W = ctx.canvas.width;
var H = ctx.canvas.height;
var delta = this.lastSnow - this.aContext.currentTime;
ctx.clearRect(0, 0, W, H);
ctx.fillStyle = "rgba(255, 255, 255, 0.8)";
ctx.beginPath();
var width = this.snowCanvas.width;
var height = this.snowCanvas.height;
var delta = this.lastSnow - this.audio.currentTime;
this.snowContext.clearRect(0, 0, width, height);
this.snowContext.fillStyle = "rgba(255, 255, 255, 0.8)";
this.snowContext.beginPath();
for(var i = 0; i < this.maxSnow; i++) {
var p = this.snowflakes[i];
ctx.moveTo(p.x, p.y);
ctx.arc(p.x, p.y, p.r, 0, Math.PI*2, true);
var flake = this.snowflakes[i];
this.snowContext.moveTo(flake.x, flake.y);
this.snowContext.arc(flake.x, flake.y, flake.r, 0, Math.PI * 2, true);
}
ctx.fill();
this.snowContext.fill();
this.snowAngle += delta / 6;
for(var i = 0; i < this.maxSnow; i++) {
var p = this.snowflakes[i];
var flake = this.snowflakes[i];
//Updating X and Y coordinates
//We will add 1 to the cos function to prevent negative values which will lead flakes to move upwards
//Every particle has its own density which can be used to make the downward movement different for each flake
//Lets make it more random by adding in the radius
p.y += Math.cos(this.snowAngle+p.d) + 1 + p.r/2;
p.x += Math.sin(this.snowAngle) * 2;
flake.y += Math.cos(this.snowAngle + flake.d) + 1 + flake.r / 2;
flake.x += Math.sin(this.snowAngle) * 2;
//Sending flakes back from the top when it exits
//Lets make it a bit more organic and let flakes enter from the left and right also.
if(p.x > W+5 || p.x < -5 || p.y > H) {
if(flake.x > width + 5 || flake.x < -5 || flake.y > height) {
if(i % 3 > 0) {//66.67% of the flakes
this.snowflakes[i] = {x: Math.random()*W, y: -10, r: p.r, d: p.d};
this.snowflakes[i] = {x: Math.random() * width, y: -10, r: flake.r, d: flake.d};
}
else {
//If the flake is exitting from the right
if(Math.sin(this.snowAngle) > 0) {
//Enter from the left
this.snowflakes[i] = {x: -5, y: Math.random()*H, r: p.r, d: p.d};
this.snowflakes[i] = {x: -5, y: Math.random() * height, r: flake.r, d: flake.d};
}
else {
//Enter from the right
this.snowflakes[i] = {x: W+5, y: Math.random()*H, r: p.r, d: p.d};
this.snowflakes[i] = {x: width+5, y: Math.random() * height, r: flake.r, d: flake.d};
}
}
}
}
this.lastSnow = this.aContext.currentTime;
this.lastSnow = this.audio.currentTime;
};
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