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Aaron Fenyes 2024-10-22 01:15:53 -07:00
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challenges/octahedron.html
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</head>
<body>
<a href="../">↩ Index page</a>
<h1>Octahedron challenge</h1>
<p>Can you create something like this using <a href="https://jsxgraph.org/docs/symbols/Point3D.html#constructor"><code>Point3D</code></a> and <a href="https://jsxgraph.org/docs/symbols/Polygon3D.html#constructor"><code>Polygon3D</code></a> elements? Don’t worry about including the colors; they’re just to emphasize how the polygons fit together.</p>
<p>The <code>create</code> call for <code>Polygon3D</code> isn’t documented, but you can look at the polygon sampler for examples.</p>
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);
}
</script>
</body>
</html>

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challenges/sphere-contours.html
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</head>
<body>
<a href="../">↩ Index page</a>
<h1>Sphere contour challenge</h1>
<p>Can you create something like this using <a href="https://jsxgraph.org/docs/symbols/Sphere3D.html#constructor"><code>Sphere3D</code></a>, <code>Plane3D</code>, and <a href="https://jsxgraph.org/docs/symbols/IntersectionCircle3D.html"><code>IntersectionCircle3D</code></a> elements? Don’t worry about including the colors; they’re just to clarify what happens when you move the center of the sphere.</p>
<p>The <code>visible</code> attribute will come in handy.</p>
<p>Since the <code>create</code> call for <code>Plane3D</code> isn’t documented, I’ve included an <a href="#create-plane">example</a> below.</p>
<div id="sphere-contours" class="jxgbox" style="width:600px; height:600px"></div>
<h2 id="create-plane">How to create a 3D plane</h2>
<p>A <code>Plane3D</code> is created from a base point and two vectors. The base point can be given either in coordinates or as a <a href="https://jsxgraph.org/docs/symbols/Point3D.html#constructor"><code>Point3D</code></a>. The vectors are given in coordinates.</p>
<div id="plane-example" class="jxgbox" style="width:600px; height:600px"></div>
<!-- a solution to the sphere contour challenge -->
<script type="text/javascript">
// to prevent variable name conflicts, we define variables locally using `let`
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</script>
<!-- how to create a 3D plane -->
<h2 id="create-plane">How to create a 3D plane</h2>
<p>A <code>Plane3D</code> is created from a base point and two vectors. The base point can be given either in coordinates or as a <a href="https://jsxgraph.org/docs/symbols/Point3D.html#constructor"><code>Point3D</code></a>. The vectors are given in coordinates.</p>
<div id="plane-example" class="jxgbox" style="width:600px; height:600px"></div>
<script type="text/javascript">
// to prevent variable name conflicts, we define variables locally using `let`
// and put the code for each board in its own block