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147 lines
5.6 KiB
147 lines
5.6 KiB
2 years ago
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<!DOCTYPE html>
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<html lang="en">
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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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[page:Curve] → [page:CurvePath] →
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<h1>[name]</h1>
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<p class="desc">
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A 2D path representation. The class provides methods for creating paths and contours of 2D shapes similar to the 2D Canvas API.
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</p>
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<h2>Code Example</h2>
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<code>
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const path = new THREE.Path();
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path.lineTo( 0, 0.8 );
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path.quadraticCurveTo( 0, 1, 0.2, 1 );
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path.lineTo( 1, 1 );
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const points = path.getPoints();
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const geometry = new THREE.BufferGeometry().setFromPoints( points );
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const material = new THREE.LineBasicMaterial( { color: 0xffffff } );
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const line = new THREE.Line( geometry, material );
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scene.add( line );
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</code>
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<h2>Constructor</h2>
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<h3>[name]( [param:Array points] )</h3>
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<p>
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points -- (optional) array of [page:Vector2 Vector2s].<br /><br />
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Creates a Path from the points. The first point defines the offset, then successive points
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are added to the [page:CurvePath.curves curves] array as [page:LineCurve LineCurves].<br /><br />
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If no points are specified, an empty path is created and the [page:.currentPoint] is set to
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the origin.
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</p>
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<h2>Properties</h2>
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<p>See the base [page:CurvePath] class for common properties.</p>
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<h3>[property:Vector2 currentPoint]</h3>
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<p>The current offset of the path. Any new [page:Curve] added will start here.</p>
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<h2>Methods</h2>
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<p>See the base [page:CurvePath] class for common methods.</p>
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<h3>[method:this absarc]( [param:Float x], [param:Float y], [param:Float radius], [param:Float startAngle], [param:Float endAngle], [param:Boolean clockwise] )</h3>
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<p>
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x, y -- The absolute center of the arc.<br />
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radius -- The radius of the arc.<br />
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startAngle -- The start angle in radians.<br />
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endAngle -- The end angle in radians.<br />
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clockwise -- Sweep the arc clockwise. Defaults to `false`.<br /><br />
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Adds an absolutely positioned [page:EllipseCurve EllipseCurve] to the path.
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</p>
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<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>
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<p>
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x, y -- The absolute center of the ellipse.<br />
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xRadius -- The radius of the ellipse in the x axis.<br />
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yRadius -- The radius of the ellipse in the y axis.<br />
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startAngle -- The start angle in radians.<br />
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endAngle -- The end angle in radians.<br />
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clockwise -- Sweep the ellipse clockwise. Defaults to false.<br />
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rotation -- The rotation angle of the ellipse in radians, counterclockwise from the positive X axis. Optional, defaults to 0.<br /><br />
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Adds an absolutely positioned [page:EllipseCurve EllipseCurve] to the path.
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</p>
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<h3>[method:this arc]( [param:Float x], [param:Float y], [param:Float radius], [param:Float startAngle], [param:Float endAngle], [param:Boolean clockwise] )</h3>
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<p>
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x, y -- The center of the arc offset from the last call.<br />
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radius -- The radius of the arc.<br />
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startAngle -- The start angle in radians.<br />
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endAngle -- The end angle in radians.<br />
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clockwise -- Sweep the arc clockwise. Defaults to `false`.<br /><br />
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Adds an [page:EllipseCurve EllipseCurve] to the path, positioned relative to [page:.currentPoint].
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</p>
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<h3>[method:this bezierCurveTo]( [param:Float cp1X], [param:Float cp1Y], [param:Float cp2X], [param:Float cp2Y], [param:Float x], [param:Float y] )</h3>
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<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>
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<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>
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<p>
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x, y -- The center of the ellipse offset from the last call.<br />
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xRadius -- The radius of the ellipse in the x axis.<br />
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yRadius -- The radius of the ellipse in the y axis.<br />
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startAngle -- The start angle in radians.<br />
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endAngle -- The end angle in radians.<br />
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clockwise -- Sweep the ellipse clockwise. Defaults to `false`.<br />
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rotation -- The rotation angle of the ellipse in radians, counterclockwise from the positive X axis. Optional, defaults to `0`.<br /><br />
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Adds an [page:EllipseCurve EllipseCurve] to the path, positioned relative to [page:.currentPoint].
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</p>
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<h3>[method:this lineTo]( [param:Float x], [param:Float y] )</h3>
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<p>Connects a [page:LineCurve] from [page:.currentPoint] to x, y onto the path.</p>
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<h3>[method:this moveTo]( [param:Float x], [param:Float y] )</h3>
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<p>Move the [page:.currentPoint] to x, y.</p>
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<h3>[method:this quadraticCurveTo]( [param:Float cpX], [param:Float cpY], [param:Float x], [param:Float y] )</h3>
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<p>Creates a quadratic curve from [page:.currentPoint] with cpX and cpY as control point and updates [page:.currentPoint] to x and y.</p>
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<h3>[method:this setFromPoints]( [param:Array vector2s] )</h3>
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<p>
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points -- array of [page:Vector2 Vector2s].<br /><br />
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Points are added to the [page:CurvePath.curves curves]
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array as [page:LineCurve LineCurves].
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</p>
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<h3>[method:this splineThru] ( [param:Array points] ) </h3>
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<p>
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points - An array of [page:Vector2 Vector2s]<br /><br />
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Connects a new [page:SplineCurve] onto the path.
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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/src/[path].js src/[path].js]
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</p>
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</body>
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</html>
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