API Reference > geometry-core > CartesianGeometry > ClipUtilities > clipSegmentBelowPlaneXY clipSegmentBelowPlaneXY MethodStatic Find the portion of a line within a half-plane clip. The half-plane clip is to the left of the line from clipA to clipB. The original clipped segment has fractions 0 and 1 at respective segment points. Caller initializes the interval This method reduces the interval size. See clipSegmentToCCWTriangleXY for typical use. clipSegmentBelowPlaneXY(plane: Plane3dByOriginAndUnitNormal, segmentPoint0: Readonly<WritableXAndY>, segmentPoint1: Readonly<WritableXAndY>, interval: Range1d, absoluteTolerance: number = 1.0e-14): void Parameter Type Description plane Plane3dByOriginAndUnitNormal segmentPoint0 Readonly<WritableXAndY> First point of clipped segment segmentPoint1 Readonly<WritableXAndY> Second point of clipped segment interval Range1d Live interval. absoluteTolerance number absolute tolerance for both cross product values to indicate "on" the line Returns - void Defined in clipping/ClipUtils.ts Line 620 Last Updated: 11 June, 2024