forked from s3lph/matemat
147 lines
6.4 KiB
HTML
147 lines
6.4 KiB
HTML
<!DOCTYPE html>
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<html>
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<head>
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<style>
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svg {
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width: 600px;
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height: auto;
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}
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</style>
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</head>
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<body>
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<h1>Welcome, {{username}}</h1>
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<svg id="svg" width="400" height="400">
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<circle class="c" id="0" cx="12.5%" cy="12.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="1" cx="37.5%" cy="12.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="2" cx="62.5%" cy="12.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="3" cx="87.5%" cy="12.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="4" cx="12.5%" cy="37.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="5" cx="37.5%" cy="37.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="6" cx="62.5%" cy="37.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="7" cx="87.5%" cy="37.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="8" cx="12.5%" cy="62.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="9" cx="37.5%" cy="62.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="a" cx="62.5%" cy="62.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="b" cx="87.5%" cy="62.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="c" cx="12.5%" cy="87.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="d" cx="37.5%" cy="87.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="e" cx="62.5%" cy="87.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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<circle class="c" id="f" cx="87.5%" cy="87.5%" r="10%" stroke="grey" stroke-width="2%" fill="white" />
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</svg>
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<script>
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HTMLCollection.prototype.forEach = Array.prototype.forEach;
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HTMLCollection.prototype.slice = Array.prototype.slice;
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mouseDown = false;
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currentStroke = null;
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strokeId = 0;
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doneMap = {};
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enteredKey = '';
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svg = document.getElementById('svg');
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drawLine = (fromX, fromY, toX, toY) => {
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var line = document.createElementNS('http://www.w3.org/2000/svg', 'line');
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var id = 'l-' + (strokeId++);
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var idAttr = document.createAttribute('id');
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var classAttr = document.createAttribute('class');
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var x1attr = document.createAttribute('x1');
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var y1attr = document.createAttribute('y1');
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var x2attr = document.createAttribute('x2');
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var y2attr = document.createAttribute('y2');
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var styleAttr = document.createAttribute('style');
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idAttr.value = id;
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classAttr.value = 'l';
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x1attr.value = fromX;
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y1attr.value = fromY;
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x2attr.value = toX;
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y2attr.value = toY;
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styleAttr.value = 'stroke: grey; stroke-width: 5%; stroke-linecap: round';
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line.setAttributeNode(idAttr);
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line.setAttributeNode(classAttr);
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line.setAttributeNode(x1attr);
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line.setAttributeNode(y1attr);
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line.setAttributeNode(x2attr);
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line.setAttributeNode(y2attr);
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line.setAttributeNode(styleAttr);
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svg.appendChild(line);
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return id;
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};
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svg.onmousedown = (ev) => {
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var svgrect = svg.getBoundingClientRect();
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var minId = '';
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var minDist = Infinity;
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var minx = 0;
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var miny = 0;
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doneMap = {};
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document.getElementsByClassName('c').forEach((circle) => {
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var x = parseFloat(circle.getAttribute('cx'))/100.0 * svgrect.width;
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var y = parseFloat(circle.getAttribute('cy'))/100.0 * svgrect.height;
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var dist = Math.pow(ev.offsetX - x, 2) + Math.pow(ev.offsetY - y, 2);
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if (dist < minDist) {
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minDist = dist;
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minId = circle.id;
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minx = x;
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miny = y;
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}
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});
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var minNode = svg.getElementById(minId);
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currentStroke = drawLine(minx, miny, ev.offsetX, ev.offsetY);
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doneMap[minId] = 1;
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enteredKey += minId;
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};
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svg.onmouseup = (ev) => {
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currentStroke = null;
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doneMap = {};
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console.log(enteredKey);
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enteredKey = '';
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svg.getElementsByClassName('l').slice().reverse().forEach((line) => {
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svg.removeChild(line);
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});
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};
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svg.onmousemove = (ev) => {
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if (currentStroke != null) {
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var svgrect = svg.getBoundingClientRect();
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var minId = '';
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var minDist = Infinity;
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var minx = 0;
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var miny = 0;
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document.getElementsByClassName('c').forEach((circle) => {
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var x = parseFloat(circle.getAttribute('cx'))/100.0 * svgrect.width;
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var y = parseFloat(circle.getAttribute('cy'))/100.0 * svgrect.height;
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var dist = Math.pow(ev.offsetX - x, 2) + Math.pow(ev.offsetY - y, 2);
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if (dist < minDist) {
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minDist = dist;
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minId = circle.id;
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minx = x;
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miny = y;
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}
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});
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if (minDist < 2000 && !(minId in doneMap)) {
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var line = svg.getElementById(currentStroke);
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line.setAttribute('x2', minx);
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line.setAttribute('y2', miny);
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currentStroke = drawLine(minx, miny, ev.offsetX, ev.offsetY);
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doneMap[minId] = 1;
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enteredKey += minId;
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}
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var line = svg.getElementById(currentStroke);
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line.setAttribute('x2', ev.offsetX);
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line.setAttribute('y2', ev.offsetY);
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}
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};
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</script>
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</body>
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</html>
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