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LogoGenerator.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Magicshifter Logo Generator</title>
<style>
body {
background: #FFF;
}
</style>
<script type="text/javascript" src="js/libs/snap.svg-min.js"></script>
<script type="text/javascript" src="js/libs/dat.gui.js"></script>
<script type="text/javascript" src="js/libs/three/three.js"></script>
<script type="text/javascript" src="js/libs/Colour.js"></script>
<script type="text/javascript" src="js/libs/FileSaver.js"></script>
<style id="myStyle">
.multiply { mix-blend-mode: multiply; }
</style>
</head>
<body>
<div style="position: fixed; bottom: 0px; left: 0px;">
<textarea style="display: none;" id="svgSource" style="width: 400px; height: 50px;"></textarea>
</div>
<script>
window.addEventListener("load", function() {
var imgData;
var s;
var width = window.innerWidth;
var height = window.innerHeight;
s = Snap(width, height);
window.addEventListener('resize', onWindowResize, false);
function onWindowResize() {
var width = window.innerWidth;
var height = window.innerHeight;
s.paper.attr({
width: width,
height: height
});
}
var simState = {
scale: 1,
lightCount: 4,
shadowScale: 1.5,
whiteW: 100,
whiteH: 20,
lightX: -40,
lightY: -85,
lightStepX: 10,
lightStepY: -9,
offsetStepX: 0,
offsetStepY: 0,
startX: 300,
startY: 200,
scale: 1,
debugLines: true,
preview: false,
save: function () {
if (simState.preview) {
simState.preview = false;
refreshGui();
DoSim();
}
var styleElement = document.getElementById("myStyle");
styleElement = styleElement.cloneNode(true);
var svgText = s.outerSVG();
var domContainer = document.createElement("div");
domContainer.innerHTML = svgText;
var domSvg = domContainer.firstChild;
domSvg.appendChild(styleElement);
svgText = outherHTML(domSvg);
var svgBlob = new Blob([svgText], {type: "image/svg+xml"});
saveAs(svgBlob, "export.svg");
document.getElementById("svgSource").value = svgText;
}
};
var gui = new dat.GUI();
gui.remember(simState);
function refreshGui() {
for (var i in gui.__controllers) {
gui.__controllers[i].updateDisplay();
}
}
function SetupOnChange(controller) {
controller.onChange(function (value) {
// Fires on every change, drag, keypress, etc.
DoSim();
});
// controller.onFinishChange(function(value) {
// // Fires when a controller loses focus.
// alert("The new value is " + value);
// });
}
SetupOnChange(gui.add(simState, 'whiteW', 1, 400));
SetupOnChange(gui.add(simState, 'whiteH', 1, 200));
SetupOnChange(gui.add(simState, 'lightCount', 1, 7));
SetupOnChange(gui.add(simState, 'shadowScale', -2, 5));
SetupOnChange(gui.add(simState, 'lightX', -200, 200));
SetupOnChange(gui.add(simState, 'lightY', -200, 200));
SetupOnChange(gui.add(simState, 'lightStepX', -100, 100));
SetupOnChange(gui.add(simState, 'lightStepY', -100, 100));
SetupOnChange(gui.add(simState, 'offsetStepX', -100, 100));
SetupOnChange(gui.add(simState, 'offsetStepY', -100, 100));
SetupOnChange(gui.add(simState, 'startX', -500, 500));
SetupOnChange(gui.add(simState, 'startY', -500, 500));
SetupOnChange(gui.add(simState, 'scale', -2, 10));
SetupOnChange(gui.add(simState, 'debugLines'));
gui.add(simState, 'save');
// initial run
DoSim();
function DoSim() {
s.clear();
var scale = simState.scale;
var repos = [scale*simState.startX, scale*simState.startY];
var whiteW=scale*simState.whiteW, whiteH=scale*simState.whiteH;
var whiteObj = [[0,0], [whiteW, 0], [whiteW, whiteH], [0, whiteH]];
var lightPos = [scale*simState.lightX, scale*simState.lightY];
var shadowScale = simState.shadowScale;
var debugLines = simState.debugLines;
var offset = [0, 0];
var offsetDelta = [scale*simState.offsetStepX, scale*simState.offsetStepY];
var lightMove = [scale*simState.lightStepX, scale*simState.lightStepY];
colors = ["#F70", "#F0F", "#0FF", "#FF0", "#7FF", "#F7F", "#FF7"].slice(0, simState.lightCount);
////////////////// no state here
// reposition
for (var i in whiteObj) {
var o = whiteObj[i];
whiteObj[i] = add(o, repos);
}
lightPos = add(lightPos, repos);
/////////
for (var i in colors) {
var color = colors[i];
drawShadow(whiteObj, lightPos, shadowScale, offset, color, debugLines);
lightPos = add(lightPos, lightMove);
offset = add(offset, offsetDelta);
}
function drawShadow(whiteObj, lightPos, shadowScale, offset, color, drawHelp) {
var shadowPoints = [];
for (var i in whiteObj) {
var point = whiteObj[i];
var dir = sub(point, lightPos);
var dirLen = len(dir);
var scaledDir = mul(dir, shadowScale);
var shadowPoint = add(lightPos, scaledDir);
shadowPoints[i] = {point: shadowPoint, len: dirLen, i: i};
if (drawHelp) {
var path = s.path(move(lightPos, true) + line(shadowPoint, true));
path.attr({
stroke: "#AAA",
strokeWidth: 1
});
}
}
shadowPoints.sort(function (a, b) {
return b.len - a.len
});
var iMax = shadowPoints[0].i;
var i2 = shadowPoints[1].i;
var i3 = shadowPoints[2].i;
var path = s.path(
move(whiteObj[i3], true) +
line(whiteObj[iMax], true) +
line(whiteObj[i2], true) +
line(add(shadowPoints[1].point, offset), true) +
line(add(shadowPoints[0].point, offset), true) +
line(add(shadowPoints[2].point, offset), true) +
"z"
);
path.attr({
stroke: "#000",
strokeWidth: 0,
fill: color,
class: "multiply"
});
}
var svgText = s.outerSVG();
document.getElementById("svgSource").value = svgText;
}
function add(a, b) {
return [a[0] + b[0], a[1]+b[1]];
}
function sub(a, b) {
return [a[0] - b[0], a[1]-b[1]];
}
function mul(a, s) {
return [a[0]*s, a[1]*s];
}
function len(a) {
return Math.sqrt(a[0]*a[0] * a[1]*a[1]);
}
function point2path(point) {
return point[0] + " " + point[1];
}
function move(point, abs) {
var prefix = abs ? "M" : "m";
return prefix+point2path(point) + " ";
}
function line(point, abs) {
var prefix = abs ? "L" : "l";
return prefix+point2path(point) + " ";
}
function outherHTML(el) {
var tmp = document.createElement("div");
tmp.appendChild(el);
return tmp.innerHTML; // <p>Test</p>
}
});
</script>
</body>
</html>