javascript
/
three.js
镜像来自 https://github.com/tazdij/three.js.git


			
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		[page:Curve] &rarr; [page:CurvePath] &rarr;

		<h1>[name]</h1>

		<p class="desc">
		A 2D path representation. The class provides methods for creating paths and contours of 2D shapes similar to the 2D Canvas API.
		</p>

		<h2>Code Example</h2>

		<code>
		const path = new THREE.Path();

		path.lineTo( 0, 0.8 );
		path.quadraticCurveTo( 0, 1, 0.2, 1 );
		path.lineTo( 1, 1 );

		const points = path.getPoints();

		const geometry = new THREE.BufferGeometry().setFromPoints( points );
		const material = new THREE.LineBasicMaterial( { color: 0xffffff } );

		const line = new THREE.Line( geometry, material );
		scene.add( line );
		</code>


		<h2>Constructor</h2>


		<h3>[name]( [param:Array points] )</h3>
		<p>
		points -- (optional) array of [page:Vector2 Vector2s].<br /><br />

		Creates a Path from the points. The first point defines the offset, then successive points
		are added to the [page:CurvePath.curves curves] array as [page:LineCurve LineCurves].<br /><br />

		If no points are specified, an empty path is created and the [page:.currentPoint] is set to
		the origin.
		</p>


		<h2>Properties</h2>
		<p>See the base [page:CurvePath] class for common properties.</p>

		<h3>[property:Array currentPoint]</h3>
		<p>The current offset of the path. Any new [page:Curve] added will start here.</p>


		<h2>Methods</h2>
		<p>See the base [page:CurvePath] class for common methods.</p>

		<h3>[method:this absarc]( [param:Float x], [param:Float y], [param:Float radius], [param:Float startAngle], [param:Float endAngle], [param:Boolean clockwise] )</h3>
		<p>
			x, y -- The absolute center of the arc.<br />
			radius -- The radius of the arc.<br />
			startAngle -- The start angle in radians.<br />
			endAngle -- The end angle in radians.<br />
			clockwise -- Sweep the arc clockwise. Defaults to *false*.<br /><br />

			Adds an absolutely positioned [page:EllipseCurve EllipseCurve] to the path.
		</p>

		<h3>[method:this absellipse]( [param:Float x], [param:Float y], [param:Float xRadius], [param:Float yRadius], [param:Float startAngle], [param:Float endAngle], [param:Boolean clockwise], [param:Float rotation] )</h3>
		<p>
			x, y -- The absolute center of the ellipse.<br />
			xRadius -- The radius of the ellipse in the x axis.<br />
			yRadius -- The radius of the ellipse in the y axis.<br />
			startAngle -- The start angle in radians.<br />
			endAngle -- The end angle in radians.<br />
			clockwise -- Sweep the ellipse clockwise. Defaults to false.<br />
			rotation -- The rotation angle of the ellipse in radians, counterclockwise from the positive X axis. Optional, defaults to 0.<br /><br />

			Adds an absolutely positioned [page:EllipseCurve EllipseCurve] to the path.
		</p>

		<h3>[method:this arc]( [param:Float x], [param:Float y], [param:Float radius], [param:Float startAngle], [param:Float endAngle], [param:Boolean clockwise] )</h3>
		<p>
		x, y -- The center of the arc offset from the last call.<br />
		radius -- The radius of the arc.<br />
		startAngle -- The start angle in radians.<br />
		endAngle -- The end angle in radians.<br />
		clockwise -- Sweep the arc clockwise. Defaults to *false*.<br /><br />

		Adds an [page:EllipseCurve EllipseCurve] to the path, positioned relative to [page:.currentPoint].
		</p>


		<h3>[method:this bezierCurveTo]( [param:Float cp1X], [param:Float cp1Y], [param:Float cp2X], [param:Float cp2Y], [param:Float x], [param:Float y] )</h3>
		<p>This creates a bezier curve from [page:.currentPoint] with (cp1X, cp1Y) and (cp2X, cp2Y) as control points and updates [page:.currentPoint] to x and y.</p>

		<h3>[method:this ellipse]( [param:Float x], [param:Float y], [param:Float xRadius], [param:Float yRadius], [param:Float startAngle], [param:Float endAngle], [param:Boolean clockwise], [param:Float rotation] )</h3>
		<p>
			x, y -- The center of the ellipse offset from the last call.<br />
			xRadius -- The radius of the ellipse in the x axis.<br />
			yRadius -- The radius of the ellipse in the y axis.<br />
			startAngle -- The start angle in radians.<br />
			endAngle -- The end angle in radians.<br />
			clockwise -- Sweep the ellipse clockwise. Defaults to *false*.<br />
			rotation -- The rotation angle of the ellipse in radians, counterclockwise from the positive X axis. Optional, defaults to *0*.<br /><br />

			Adds an [page:EllipseCurve EllipseCurve] to the path, positioned relative to [page:.currentPoint].
		</p>

		<h3>[method:this lineTo]( [param:Float x], [param:Float y] )</h3>
		<p>Connects a [page:LineCurve] from [page:.currentPoint] to x, y onto the path.</p>


		<h3>[method:this moveTo]( [param:Float x], [param:Float y] )</h3>
		<p>Move the [page:.currentPoint] to x, y.</p>


		<h3>[method:this quadraticCurveTo]( [param:Float cpX], [param:Float cpY], [param:Float x], [param:Float y] )</h3>
		<p>Creates a quadratic curve from [page:.currentPoint] with cpX and cpY as control point and updates [page:.currentPoint] to x and y.</p>

		<h3>[method:this setFromPoints]( [param:Array vector2s] )</h3>
		<p>
			points --  array of [page:Vector2 Vector2s].<br /><br />

			Points are added to the [page:CurvePath.curves curves]
			array as [page:LineCurve LineCurves].
		</p>

		<h3>[method:this splineThru] ( [param:Array points] ) </h3>
		<p>
			points - An array of [page:Vector2 Vector2s]<br /><br />

			Connects a new [page:SplineCurve] onto the path.
		</p>

		<h2>Source</h2>

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