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84 lines
2.3 KiB
84 lines
2.3 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="zh">
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<head>
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<meta charset="utf-8" />
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<base href="../../../../" />
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<script src="page.js"></script>
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<link type="text/css" rel="stylesheet" href="page.css" />
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</head>
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<body>
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<h1>[name]</h1>
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<p class="desc">
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The basis for a half-edge data structure, also known as doubly connected edge list (DCEL).<br />
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</p>
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<h2>Constructor</h2>
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<h3>[name]( [param:VertexNode vertex], [param:Face face] )</h3>
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<p>
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[page:VertexNode vertex] - [page:VertexNode] A reference to its destination vertex.<br />
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[page:Face face] - [page:Face] A reference to its face.<br /><br />
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Creates a new instance of [name].
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</p>
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<h2>Properties</h2>
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<h3>[property:VertexNode vertex]</h3>
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<p>
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Reference to the destination vertex. The origin vertex can be obtained by querying the destination of its twin, or of the previous half-edge. Default is undefined.
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</p>
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<h3>[property:HalfEdge prev]</h3>
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<p>
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Reference to the previous half-edge of the same face. Default is null.
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</p>
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<h3>[property:HalfEdge next]</h3>
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<p>
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Reference to the next half-edge of the same face. Default is null.
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</p>
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<h3>[property:HalfEdge twin]</h3>
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<p>
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Reference to the twin half-edge to reach the opposite face. Default is null.
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</p>
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<h3>[property:Face face]</h3>
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<p>
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Each half-edge bounds a single face and thus has a reference to that face. Default is undefined.
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</p>
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<h2>Methods</h2>
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<h3>[method:VertexNode head]()</h3>
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<p>Returns the destination vertex.</p>
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<h3>[method:VertexNode tail]()</h3>
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<p>Returns the origin vertex.</p>
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<h3>[method:Float length]()</h3>
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<p>Returns the [link:https://en.wikipedia.org/wiki/Euclidean_distance Euclidean length]
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(straight-line length) of the edge.</p>
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<h3>[method:Float lengthSquared]()</h3>
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<p>Returns the square of the [link:https://en.wikipedia.org/wiki/Euclidean_distance Euclidean length]
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(straight-line length) of the edge.</p>
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<h3>[method:this setTwin]( [param:HalfEdge edge] )</h3>
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<p>
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[page:HalfEdge edge] - Any half-edge.<br /><br />
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Sets the twin edge of this half-edge. It also ensures that the twin reference of the given half-edge is correctly set.
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</p>
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<h2>Source</h2>
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<p>
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[link:https://github.com/mrdoob/three.js/blob/master/examples/jsm/math/ConvexHull.js examples/jsm/math/ConvexHull.js]
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</p>
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</body>
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</html>
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