📄 threejs/Addons/Lines/LineSegmentsGeometry

File: LineSegmentsGeometry.md | Updated: 11/15/2025


title: LineSegmentsGeometry category: Addons layout: docs

LineSegmentsGeometry

A series of vertex pairs, forming line segments.

This is used in LineSegments2 to describe the shape.

Import

LineSegmentsGeometry is an addon, and must be imported explicitly, see Installation#Addons.

import { LineSegmentsGeometry } from 'three/addons/lines/LineSegmentsGeometry.js';

Constructor

new LineSegmentsGeometry()

Constructs a new line segments geometry.

Properties

.isLineSegmentsGeometry : boolean (readonly)

This flag can be used for type testing.

Default is true.

Methods

.applyMatrix4( matrix : Matrix4 ) : LineSegmentsGeometry

Applies the given 4x4 transformation matrix to the geometry.

matrix | The matrix to apply.
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Returns: A reference to this instance.

.fromEdgesGeometry( geometry : EdgesGeometry ) : LineSegmentsGeometry

Setups this line segments geometry from the given edges geometry.

geometry | The geometry that should be used as a data source for this geometry.
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Returns: A reference to this geometry.

.fromLineSegments( lineSegments : LineSegments ) : LineSegmentsGeometry

Setups this line segments geometry from the given line segments.

lineSegments | The line segments that should be used as a data source for this geometry. Assumes the source geometry is not using indices.
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Returns: A reference to this geometry.

.fromMesh( mesh : Mesh ) : LineSegmentsGeometry

Setups this line segments geometry from the given mesh.

mesh | The mesh geometry that should be used as a data source for this geometry.
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Returns: A reference to this geometry.

.fromWireframeGeometry( geometry : WireframeGeometry ) : LineSegmentsGeometry

Setups this line segments geometry from the given wireframe geometry.

geometry | The geometry that should be used as a data source for this geometry.
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Returns: A reference to this geometry.

.setColors( array : Float32Array | Array.<number> ) : LineSegmentsGeometry

Sets the given line colors for this geometry. The length must be a multiple of six since each line segment is defined by a start end color in the pattern (rgb rgb).

array | The position data to set.
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Returns: A reference to this geometry.

.setPositions( array : Float32Array | Array.<number> ) : LineSegmentsGeometry

Sets the given line positions for this geometry. The length must be a multiple of six since each line segment is defined by a start end vertex in the pattern (xyz xyz).

array | The position data to set.
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Returns: A reference to this geometry.

Source

examples/jsm/lines/LineSegmentsGeometry.js