API Reference > geometry-core > Polyface > PolyfaceData > reverseIndices reverseIndices Method reverse indices facet-by-facet, with the given facetStartIndex array delimiting faces. facetStartIndex[0] == 0 always -- start of facet zero. facet k has indices from facetStartIndex[k] <= i < facetStartIndex[k+1] hence for "internal" k, facetStartIndex[k] is both the upper limit of facet k-1 and the start of facet k. reverseIndices(facetStartIndex?: number[]): void Parameter Type Description facetStartIndex number[] Returns - void Defined in core/geometry/src/polyface/PolyfaceData.ts Line 322 Last Updated: 13 June, 2024