[Home](./index.md) > [@three3d/effect](./effect.md) > [PathGeometry](./effect.pathgeometry.md) ## PathGeometry class 路径Geometry **Signature:** ```typescript export declare class PathGeometry extends BufferGeometry ``` **Extends:** BufferGeometry ## Remarks 可根据曲线、点来生成路径几何体； 支持路径追加； 支持设置起始长度 支持起始-终点颜色渐变 支持绘制的指定的长度区间 ## Constructors | Constructor | Modifiers | Description | | --- | --- | --- | | [(constructor)(options)](./effect.pathgeometry._constructor_.md) | | Constructs a new instance of the PathGeometry class | ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [\_curvePath](./effect.pathgeometry._curvepath.md) | protected | CurvePath<Vector3> | | | [\_curves](./effect.pathgeometry._curves.md) | protected | Curve<Vector3>\[\] | | | [\_endDrawLength](./effect.pathgeometry._enddrawlength.md) | protected | number \| null | | | [\_options](./effect.pathgeometry._options.md) | protected | Options \| null | | | [\_pathData](./effect.pathgeometry._pathdata.md) | protected | [PathData](./effect.pathdata.md)<Vector3> | | | [\_startDrawLength](./effect.pathgeometry._startdrawlength.md) | protected | number | | | [autoClose](./effect.pathgeometry.autoclose.md) | | boolean \| undefined | 是否自动闭合 | | [closed](./effect.pathgeometry.closed.md) | readonly | boolean | 当前是否已经闭合 | | [closedCurvePath](./effect.pathgeometry.closedcurvepath.md) | readonly | CurvePath<Vector3> | 闭合的曲线路径 | | [closedPathData](./effect.pathgeometry.closedpathdata.md) | readonly | [PathData](./effect.pathdata.md)<Vector3> | | | [color](./effect.pathgeometry.color.md) | | ColorRepresentation \| null \| undefined | 线的颜色 | | [curvePath](./effect.pathgeometry.curvepath.md) | | CurvePath<Vector3> | 表示路径的曲线 | | [curves](./effect.pathgeometry.curves.md) | | Curve<Vector3>\[\] | 组成路径的曲线列表 | | [endColor](./effect.pathgeometry.endcolor.md) | | ColorRepresentation \| null | 终点处的颜色 | | [endDrawLength](./effect.pathgeometry.enddrawlength.md) | | number | 结束绘制的长度范围 | | [endLength](./effect.pathgeometry.endlength.md) | readonly | number | 终点位置处的长度 | | [firstPoint](./effect.pathgeometry.firstpoint.md) | readonly | Vector3 | curvePath 上的第一个点 | | [globalOptions](./effect.pathgeometry.globaloptions.md) | readonly | Options | 全局选项 | | [isPathGeometry](./effect.pathgeometry.ispathgeometry.md) | readonly | (not declared) | | | [lastPoint](./effect.pathgeometry.lastpoint.md) | readonly | Vector3 | curvePath 上的最后一个点 | | [lastPosition](./effect.pathgeometry.lastposition.md) | readonly | Vector3 \| null | position 属性中的最后一个点 | | [length](./effect.pathgeometry.length.md) | readonly | number | 线性几何体本身的长度 | | [lengths](./effect.pathgeometry.lengths.md) | | number\[\] | 曲线上生成的点 | | [lineDistance](./effect.pathgeometry.linedistance.md) | readonly | ArrayLike<number> | 获取顶点对应的长度的数组 | | [options](./effect.pathgeometry.options.md) | | Options | 实例级别的选项 | | [options](./effect.pathgeometry.options.md) | static | [PathGeometryOptions](./effect.pathgeometryoptions.md) | 全局选项 | | [pathData](./effect.pathgeometry.pathdata.md) | | [PathData](./effect.pathdata.md)<Vector3> | 路径数据 | | [points](./effect.pathgeometry.points.md) | | Vector3\[\] | 所有的顶点 | | [sampleLength](./effect.pathgeometry.samplelength.md) | | number | 采样长度 | | [sampleNum](./effect.pathgeometry.samplenum.md) | | number \| undefined | 采样数 | | [startColor](./effect.pathgeometry.startcolor.md) | | ColorRepresentation \| null | 线开始处的颜色 | | [startDrawLength](./effect.pathgeometry.startdrawlength.md) | | number | 开始绘制的长度范围 | | [startLength](./effect.pathgeometry.startlength.md) | | number | 路径起始位置处的长度 | | [vertexCount](./effect.pathgeometry.vertexcount.md) | readonly | number | 顶点个数 | | [width](./effect.pathgeometry.width.md) | | number | 路径的宽度 | ## Methods | Method | Modifiers | Description | | --- | --- | --- | | [append(pathItem)](./effect.pathgeometry.append.md) | | | | [appendAttributes(attrs)](./effect.pathgeometry.appendattributes.md) | | 追加新的属性 | | [copy(source)](./effect.pathgeometry.copy.md) | | | | [generateCurvePath()](./effect.pathgeometry.generatecurvepath.md) | | 生成曲线 | | [getClosestIndex(length)](./effect.pathgeometry.getclosestindex.md) | | 获取与指定长度值最近的索引 | | [getNearbyIndex(length, right)](./effect.pathgeometry.getnearbyindex.md) | | 获取目标长度值附近的索引 | | [resetAttributes(attrs)](./effect.pathgeometry.resetattributes.md) | | 重围所有的 Attributes | | [set(pathItem)](./effect.pathgeometry.set.md) | | | | [setDrawLength(startLength, endLength)](./effect.pathgeometry.setdrawlength.md) | | 设置绘制的长度范围 | | [updateGeometry()](./effect.pathgeometry.updategeometry.md) | | |