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80 lines
1.4 KiB
HTML
80 lines
1.4 KiB
HTML
4 months ago
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf8" />
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<title>extendNewGraph</title>
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<style>
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html, body, #canvas {
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width: 100%;
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height: 100%;
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margin: 0px;
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padding: 0px;
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}
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</style>
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<script src="../../dist/crender.map.js"></script>
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</head>
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<body>
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<canvas id="canvas"></canvas>
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</body>
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<script>
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const { CRender, extendNewGraph } = window.CRender
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const render = new CRender(document.querySelector('#canvas'))
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extendNewGraph('line', {
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shape: {
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x: 0,
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y: 0,
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length: 0
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},
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validator ({ shape }) {
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const { x, y, length } = shape
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if (
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typeof x !== 'number' ||
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typeof y !== 'number' ||
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typeof length !== 'number'
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) {
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console.warn('line: shape attributes all must be a number!')
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return false
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}
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return true
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},
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draw ({ ctx }, { shape }) {
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const { x, y, length } = shape
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ctx.beginPath()
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ctx.moveTo(x, y)
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ctx.lineTo(x + length, y)
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ctx.closePath()
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ctx.stroke()
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}
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})
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const [w, h] = render.area
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const line = render.add({
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name: 'line',
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shape: {
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x: w / 2 - 100,
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y: h / 2,
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length: 200
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},
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style: {
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stroke: '#ffee97',
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lineWidth: 10
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}
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})
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</script>
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</html>
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