javascript
/
three.js
kopia lustrzana https://github.com/tazdij/three.js.git


			
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		<h1>[name]</h1>

		<div class="desc">
		An abstract base class for creating a curve object that contains methods for interpolation.
		For an array of Curves see [page:CurvePath].
		</div>

		<h2>Examples</h2>

		<h3>[example:webgl_geometry_extrude_splines geometry / extrude / splines ]</h3>

		<h2>Constructor</h2>


		<h3>[name]()</h3>
		<div>
		This constructor creates a new [name].
		</div>


		<h2>Methods</h2>

		<h3>[method:Vector getPoint]( [page:Number t] )</h3>
		<div>Returns a vector for point t of the curve where t is between 0 and 1. Must be implemented in the extending class.</div>

		<h3>[method:Vector getPointAt]( [page:Number u] )</h3>
		<div>
			Returns a vector for point at a relative position in curve according to arc length.
			u is in the range [0, 1].
		</div>

		<h3>[method:Array getPoints]( [page:integer divisions] )</h3>
		<div>
			divisions -- number of pieces to divide the curve into. Default is *5*.<br /><br />

			Returns a set of divisions + 1 points using getPoint( t ).
		</div>

		<h3>[method:Array getSpacedPoints]( divisions )</h3>
		<div>
			divisions -- number of pieces to divide the curve into. Default is *5*.<br /><br />

			Returns a set of divisions + 1 equi-spaced points using getPointAt( u ).
		</div>

		<h3>[method:Float getLength]()</h3>
		<div>Get total curve arc length.</div>

		<h3>[method:Array getLengths]( divisions )</h3>
		<div>Get list of cumulative segment lengths.</div>

		<h3>[method:null updateArcLengths]()</h3>
		<div>Update the cumlative segment distance cache.</div>

		<h3>[method:Float getUtoTmapping]( [page:Number u], distance )</h3>
		<div>
			Given u in the range ( 0 .. 1 ), returns [page:Number t] also in the range ( 0 .. 1 ).
			u and t can then be used to give you points which are equidistant from the ends of the curve,
			using [page:.getPoint].
		 </div>

		<h3>[method:Vector getTangent]( [page:Number t] )</h3>
		<div>
			Returns a unit vector tangent at t. If the subclassed curve do not implement its
			tangent derivation, 2 points a small delta apart will be used to find its gradient
			which seems to give a reasonable approximation
		</div>

		<h3>[method:Vector getTangentAt]( [page:Number u] )</h3>
		<div>
			Returns tangent at a point which is equidistant to the ends of the curve from the
			point given in [page:.getTangent].
		</div>

		<h3>[method:Object computeFrenetFrames]( segments, closed )</h3>
		<div>
		Generates the Frenet Frames. Used in geometries like [page:TubeGeometry] or [page:ExtrudeGeometry].
		</div>

		<h2>Source</h2>

		[link:https://github.com/mrdoob/three.js/blob/master/src/[path].js src/[path].js]
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