API Reference > geometry-core > CartesianGeometry > ClipPlane > clipConvexPolygonInPlace clipConvexPolygonInPlace Method Clip a polygon to the inside or outside of the plane. Results with 2 or fewer points are ignored. Other than ensuring capacity in the arrays, there are no object allocations during execution of this function. clipConvexPolygonInPlace(xyz: GrowableXYZArray, work: GrowableXYZArray, inside: boolean = true, tolerance: number = Geometry.smallMetricDistance): number Parameter Type Description xyz GrowableXYZArray input points. work GrowableXYZArray work buffer inside boolean tolerance number tolerance for "on plane" decision. Returns - number Defined in core/geometry/src/clipping/ClipPlane.ts Line 448 Last Updated: 15 June, 2021