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faces.html
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<!--
* Copyright 2013, Gregg Tavares.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Gregg Tavares. nor the names of his
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="js/jquery-1.9.1.js"></script>
<script src="js/webgl-utils.js"></script>
<script>
Face = (function(undefined, window){
var lineWidth_ = 10;
var lineStyle_ = "black";
var backStyle_ = "orange";
var openEyeSize_ = 15;
var closedEyeSize_ = 30;
var eyeSeparation_ = 40;
var eyeBrowMadSeparation_ = 30;
var eyeBrowSadSeparation_ = 50;
var eyeBrowYOffset_ = -60;
var mouthSize_ = 50;
var mouthYOffset_ = 20;
var none = function() {
};
var drawClosedEyeUp = function(ctx) {
ctx.beginPath();
ctx.arc(0, 0, closedEyeSize_, 0, Math.PI, true);
ctx.stroke();
};
var drawClosedEyeDown = function(ctx) {
ctx.beginPath();
ctx.arc(0, -closedEyeSize_, closedEyeSize_, Math.PI, 0, true);
ctx.stroke();
};
var drawOpenEye = function(ctx) {
ctx.beginPath();
ctx.arc(0, 0, openEyeSize_, 0, Math.PI * 2, true);
ctx.fill();
};
var drawEyes = function(ctx, eyeFunc) {
for (var ii = 0; ii < 2; ++ii) {
ctx.save();
ctx.translate(-eyeSeparation_ + eyeSeparation_ * 2 * ii, 0);
eyeFunc(ctx);
ctx.restore();
}
};
var drawOpenEyes = function(ctx) {
ctx.save();
ctx.translate(0, -closedEyeSize_ * 0.5);
drawEyes(ctx, drawOpenEye);
ctx.restore();
};
var drawWink = function(ctx) {
ctx.save();
ctx.translate(0, -closedEyeSize_ * 0.5);
ctx.save();
ctx.translate(-eyeSeparation_, 0);
drawOpenEye(ctx);
ctx.restore();
ctx.save();
ctx.translate(eyeSeparation_, 0);
ctx.beginPath();
ctx.moveTo(-20, 0);
ctx.lineTo(20, 0);
ctx.stroke();
ctx.restore();
ctx.restore();
};
var drawClosedEyesDown = function(ctx) {
drawEyes(ctx, drawClosedEyeDown);
};
var drawClosedEyesUp = function(ctx) {
ctx.save();
drawEyes(ctx, drawClosedEyeUp);
ctx.restore();
};
var drawSmile = function(ctx) {
ctx.save();
ctx.translate(0, mouthYOffset_);
ctx.beginPath();
ctx.arc(0, 0, mouthSize_, Math.PI, 0, true);
ctx.stroke();
ctx.restore();
};
var drawLaugh = function(ctx) {
ctx.save();
ctx.translate(0, mouthYOffset_);
ctx.fillStyle = lineStyle_;
ctx.beginPath();
ctx.arc(0, 0, mouthSize_, Math.PI, 0, true);
ctx.fill();
ctx.fillStyle = backStyle_;
ctx.beginPath();
var s = lineWidth_ / mouthSize_;
ctx.translate(0, lineWidth_);
ctx.scale(1 - s * 1.3, 1 - s * 2);
ctx.arc(0, 0, mouthSize_, Math.PI, 0, true);
ctx.fill();
ctx.restore();
};
var drawFrown = function(ctx) {
ctx.save();
ctx.translate(0, mouthYOffset_);
ctx.beginPath();
ctx.arc(0, mouthSize_, mouthSize_, 0, Math.PI, true);
ctx.stroke();
ctx.restore();
};
var drawAntiLaugh = function(ctx) {
ctx.save();
ctx.translate(0, mouthSize_ + mouthYOffset_);
ctx.fillStyle = lineStyle_;
ctx.beginPath();
ctx.arc(0, 0, mouthSize_, 0, Math.PI, true);
ctx.fill();
ctx.fillStyle = backStyle_;
ctx.beginPath();
var s = lineWidth_ / mouthSize_;
ctx.translate(0, -lineWidth_);
ctx.scale(1 - s * 1.3, 1 - s * 2);
ctx.arc(0, 0, mouthSize_, 0, Math.PI, true);
ctx.fill();
ctx.restore();
};
var drawSurprize = function(ctx) {
ctx.save();
ctx.translate(0, mouthYOffset_ + mouthSize_ / 2);
ctx.beginPath();
ctx.arc(0, 0, mouthSize_ / 2, 0, Math.PI * 2, true);
ctx.stroke();
ctx.restore();
};
var drawHrm = function(ctx) {
ctx.save();
ctx.translate(0, mouthYOffset_ + mouthSize_ / 2)
for (var ii = -2; ii <= 2; ++ii) {
ctx.beginPath();
ctx.arc(
mouthSize_ / 2.5 * ii,
0,
mouthSize_ / 5,
ii % 2 ? Math.PI : 0,
ii % 2 ? 0 : Math.PI,
true);
ctx.stroke();
}
ctx.restore();
};
var drawPucker = function(ctx) {
ctx.save();
ctx.translate(0, mouthYOffset_ + mouthSize_ / 2);
ctx.beginPath();
ctx.arc(0, 0, mouthSize_ / 4, 0, Math.PI * 2, true);
ctx.fill();
ctx.restore();
};
var drawBrows = function(ctx, browFunc, separation) {
for (var ii = 0; ii < 2; ++ii) {
ctx.save();
ctx.translate(-separation + separation * 2 * ii, eyeBrowYOffset_);
ctx.scale(ii ? -1 : 1, 1);
browFunc(ctx);
ctx.restore();
}
};
var drawMadBrow = function(ctx) {
ctx.save();
ctx.beginPath();
ctx.moveTo(-20, -20);
ctx.lineTo(20, 20);
ctx.stroke();
ctx.restore();
};
var drawMadBrows = function(ctx) {
drawBrows(ctx, drawMadBrow, eyeBrowMadSeparation_);
};
var drawSadBrow = function(ctx) {
ctx.save();
ctx.beginPath();
ctx.moveTo(20, -20);
ctx.lineTo(-20, 20);
ctx.stroke();
ctx.restore();
};
var drawSadBrows = function(ctx) {
drawBrows(ctx, drawSadBrow, eyeBrowSadSeparation_);
};
var parts_ = [
[
none,
drawMadBrows,
drawSadBrows,
],
[
drawOpenEyes,
drawClosedEyesUp,
drawClosedEyesDown,
drawWink,
],
[
drawSmile,
drawLaugh,
drawFrown,
drawAntiLaugh,
drawSurprize,
drawHrm,
drawPucker,
],
];
var randInt = function(range) {
return Math.floor(Math.random() * range);
};
var draw = function(ctx, partIndices) {
ctx.lineWidth = lineWidth_;
ctx.strokeStyle = lineStyle_;
ctx.fillStyle = backStyle_;
ctx.beginPath();
ctx.arc(0, 0, 120, 0, Math.PI * 2, true);
ctx.fill();
ctx.stroke();
ctx.save();
ctx.translate(0, 20);
ctx.fillStyle = lineStyle_;
//drawOpenEyes(ctx);
//drawClosedEyesDown(ctx);
//drawClosedEyesUp(ctx);
//drawWink(ctx);
//drawSmile(ctx);
//drawLaugh(ctx);
//drawFrown(ctx);
//drawAntiLaugh(ctx);
//drawSurprize(ctx);
//drawHrm(ctx);
//drawPucker(ctx);
//drawMadBrows(ctx);
//drawSadBrows(ctx);
for (var ii = 0; ii < parts_.length; ++ii) {
var funcs = parts_[ii];
var index = partIndices[ii];
funcs[index](ctx);
}
ctx.restore();
};
var partIndices_;
var partKeys_;
var drawNextRandomFace = function(ctx) {
if (!partIndices_) {
partIndices_ = [];
for (var ii = 0; ii < parts_.length; ++ii) {
var funcs = parts_[ii];
partIndices_.push(randInt(funcs.length));
}
}
// pick a random part to change
var partIndex = randInt(parts_.length);
// change that part
var funcs = parts_[partIndex];
// Don't pick the same part.
var newPart = randInt(funcs.length - 1);
if (newPart >= partIndices_[partIndex]) {
++newPart;
}
partIndices_[partIndex] = newPart;
draw(ctx, partIndices_);
};
return {
draw: draw,
drawNextRandomFace: drawNextRandomFace,
dummy: undefined,
};
}());
function main() {
var canvas = document.createElement("canvas");
canvas.width = 128;
canvas.height = 128;
var ctx = canvas.getContext("2d");
var triggerDraw;
var numImages = 20;
var images = [];
var imageNdx = 0;
var drawFace = function() {
ctx.clearRect(0, 0, canvas.width, canvas.height);
ctx.save();
ctx.scale(canvas.width / 256, canvas.height / 256);
ctx.translate(128, 128);
Face.drawNextRandomFace(ctx);
ctx.restore();
var img = images[imageNdx];
if (!img) {
img = new Image();
images[imageNdx] = img;
document.body.appendChild(img);
}
imageNdx = (imageNdx + 1) % numImages;
img.src = canvas.toDataURL();
};
var setNumFaces = function() {
var across = Math.floor($(window).width() / canvas.width);
var down = Math.floor($(window).height() / canvas.height);
numImages = Math.max(1, across * down);
// remove un-needed images
while (images.length > numImages) {
document.body.removeChild(images[images.length - 1]);
images.splice(images.length - 1, 1);
}
if (images.length) {
imageNdx = imageNdx % images.length;
}
// add needed images
while (images.length < numImages) {
drawFace();
}
};
$(window).resize(setNumFaces);
setNumFaces();
var drawFaceAndContinue = function() {
drawFace();
window.setTimeout(triggerDraw, 1000);
};
triggerDraw = function() {
requestAnimFrame(drawFaceAndContinue);
}
triggerDraw();
}
$(function(){
main();
});
</script>
</head>
<body>
</body>
</html>