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mutational.html
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<!DOCTYPE html>
<html lang="ja">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1">
<title>Mutational quick draw</title>
<link href="https://fonts.googleapis.com/css?family=Amatic+SC:400" rel="stylesheet">
<link rel="stylesheet" type="text/css" href="css/style.css">
</head>
<body>
<canvas id="paper-canvas" resize></canvas>
<div id="link"><a href="index.html">Directional</a>|<span class="active">Mutational</span></div>
<div id="loading-text">Loading</div>
<div id="svg-export">Export SVG</div>
<footer><a href="https://twitter.com/kyndinfo">kynd.info</a> | data from <a href="https://quickdraw.withgoogle.com/data">Quick, Draw!</a></footer>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/paper.js/0.11.3/paper-core.min.js"></script>
<script type="text/javascript">
let loadingText = document.getElementById("loading-text");
let canvas = document.getElementById("paper-canvas");
let drawingData;
let penTipIndex, insertPathIndex, insertSegmentIndex;
let paths = [], queue = [];
let offset, scale, rotation;
let insert = false;
let dataReq = new XMLHttpRequest();
dataReq.open("get", "./data/data.json", true);
dataReq.onload = (data)=>{
drawingData = JSON.parse(dataReq.responseText);
main();
}
dataReq.send(null);
function main() {
loadingText.setAttribute("class", "hidden");
let scope = new paper.PaperScope();
scope.setup(canvas);
window.addEventListener("resize", onResize);
onResize();
document.getElementById("svg-export").addEventListener("click", ()=>{
let fileName = "drawing.svg";
let url = "data:image/svg+xml;utf8," + encodeURIComponent(paper.project.exportSVG({asString:true}));
let link = document.createElement("a");
link.download = fileName;
link.href = url;
link.click();
})
scope.view.onMouseUp = ()=> { clear(); }
clear();
scope.view.onFrame = (evt)=> {
let penTip = new paper.Point(queue[0][0][penTipIndex], queue[0][1][penTipIndex])
.multiply(scale).rotate(rotation, new paper.Point(0,0)).add(offset);
let currentPath;
if (insert) {
currentPath = paths[insertPathIndex];
currentPath.insert(insertSegmentIndex, penTip);
insertSegmentIndex ++;
} else {
currentPath = paths[0];
if (currentPath.segments.length == 0) {
currentPath.moveTo(penTip);
} else {
currentPath.lineTo(penTip);
}
}
currentPath.smooth();
penTipIndex ++;
if (penTipIndex >= queue[0][0].length ) {
insert = false;
penTipIndex = 0;
paths.unshift(new paper.Path({strokeColor:'black', strokeWidth:0.5}));
queue.shift();
if (queue.length == 0) {
queueNewDrawing(true);
}
}
}
}
function clear() {
for (let i = 0; i < paths.length; i ++) { paths[i].remove();}
paths = [];
let drawingIndex = Math.floor(Math.random() * drawingData.length);
penTipIndex = 0;
queueNewDrawing(false);
}
function queueNewDrawing(_insert) {
insert = _insert;
queue = [];
let drawingIndex = Math.floor(Math.random() * drawingData.length);
penTipIndex = 0;
if (!insert) {
rotation = 0;
let size = Math.min(paper.view.viewSize.width, paper.view.viewSize.height) * 0.8;
offset = paper.view.viewSize.subtract(new paper.Size(size, size)).divide(new paper.Size(2));
scale = new paper.Size(size / 256, size / 256);
for (let i = 0; i < drawingData[drawingIndex].length; i ++) {
queue.push(drawingData[drawingIndex][i]);
}
paths.unshift(new paper.Path({strokeColor:'black', strokeWidth:0.5}));
} else {
let maxPathLength = 0, lineIndex = 0;
for (let i = 0; i < drawingData[drawingIndex].length; i ++) {
let l = drawingData[drawingIndex][i];
let p0 = new paper.Point(l[0][0], l[0][1]);
let p1 = new paper.Point(l[l.length - 1][0], l[l.length - 1][1]);
if (p0.subtract(p1).length > maxPathLength) {
maxPathLength = p0.subtract(p1).length;
lineIndex = i;
}
}
queue.push(drawingData[drawingIndex][lineIndex]);
for (let i = 0; i < drawingData[drawingIndex].length; i ++) {
if (i != lineIndex) {queue.push(drawingData[drawingIndex][i]);}
}
let deleteNum = 0, tryCnt = 0;
let maxSegLength = 0;
do {
let pIdx = Math.floor(Math.random() * paths.length);
let lIdx = Math.floor(1 + Math.random() * (paths[pIdx].segments.length - 1));
if (paths[pIdx] && paths[pIdx].segments.length > 1) {
let p0 = paths[pIdx].segments[lIdx - 1].point;
let p1 = paths[pIdx].segments[lIdx].point;
if (p0.subtract(p1).length > maxSegLength) {
maxSegLength = p0.subtract(p1).length;
insertPathIndex = pIdx;
insertSegmentIndex = lIdx;
}
if (tryCnt++ > 5) { break; }
}
} while (true);
/* Delate a few segments befor inserting new segments - disabled for now
deleteNum = Math.floor(Math.random() * Math.min(2, paths[insertPathIndex].segments.length - insertSegmentIndex - 1));
if (deleteNum > 0) {
paths[insertPathIndex].removeSegments(insertSegmentIndex, insertSegmentIndex + deleteNum);
}
*/
let d0 = paths[insertPathIndex].segments[insertSegmentIndex - 1].point;
let d1 = paths[insertPathIndex].segments[insertSegmentIndex].point;
let s0 = new paper.Point(queue[0][0][0], queue[0][0][1]);
let s1 = new paper.Point(queue[0][queue[0].length - 1][0], queue[0][queue[0].length - 1][1]);
let v0 = d1.subtract(d0);
let v1 = s1.subtract(s0);
let sc = v0.length / v1.length;
scale = new paper.Size(sc, sc);
rotation = v0.angle - v1.angle;
offset = d0.subtract(s0.multiply(scale).rotate(rotation, new paper.Point(0,0)));
}
}
function onResize() {
let w = document.documentElement.clientWidth;
let h = document.documentElement.clientHeight;
canvas.setAttribute("width", w);
canvas.setAttribute("height", h);
paper.view.viewSize = new paper.Size(w, h);
clear();
}
</script>
</body>
</html>