scrawl-canvas
Version:
Version 8.9.4 - 19 Nov 2022
75 lines (59 loc) • 2.36 kB
HTML
<html>
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Demo Particles 011</title>
<link href="css/normalize.css" rel="stylesheet" />
<link href="css/tests.css" rel="stylesheet" />
<style>
.controls {
grid-template-columns: 1fr 2fr 1fr 2fr;
}
canvas {
margin: 0 auto;
}
</style>
</head>
<body>
<h1><a href="index.html">Scrawl-canvas v8</a> - Particles test 011</h1>
<h2>Tracer entity: generation and functionality</h2>
<div class="controls">
<div class="green label">Select filter</div>
<div class="green">
<select class="controlItem" id="filter">
<option value="">none</option>
<option value="grayscale">grayscale</option>
<option value="invert">invert</option>
<option value="matrix">matrix</option>
<option value="tint">tint</option>
</select>
</div>
<div class="green label"> </div>
<div class="green"> </div>
</div>
<canvas
id="mycanvas"
width="600"
height="400"
data-scrawl-canvas
data-base-background-color="aliceblue"
></canvas>
<p id="reportmessage"></p>
<div class="testinfo">
<h4>Test purpose</h4>
<p><b>Be aware</b> that applying a filter to a particle system can cause it to fail in interesting yet mysterious ways! In some browsers, the addition of a filter can also cause a significant degradation in canvas animation speeds</p>
<ul>
<li>Create a path-based Shape entity.</li>
<li>Create a Tracer entity; set it to delta-animate along the Shape entity's path.</li>
<li>Clone the tracer entity (twice), giving each a clone of the original's artefact, and its own 'stampAction' function.</li>
<li>Add a selection of Filter objects to the demo; check that applying a filter to one of the Tracer entitys displays as expected.</li>
<li>Make the Shape entity draggable; check that the Tracer entitys keep up with the Shape (though their history details will not update).</li>
</ul>
<p><b>Touch test:</b> should work as expected</p>
<p><a href="../docs/demo/particles-011.html">Annotated code</a></p>
</div>
<script src="particles-011.js" type="module"></script>
</body>
</html>