API Reference › core-geometry › Polyface › PolyfaceData › reverseIndices

reverseIndices Method

Reverse the indices for the specified facets in the index arrays (pointIndex, normalIndex, paramIndex, colorIndex, and edgeVisible).

reverseIndices(facetStartIndex?: number[]): void

Parameter Type Description
facetStartIndex number[] start indices of consecutive facets to be reversed.
* Consecutive indices in this array define where a given facet is represented in each of the parallel index arrays.
* The indices for facet k are facetStartIndex[k] up to (but not including) facetStartIndex[k + 1].
* This implies facetStartIndex[k + 1] is both the upper limit of facet k's indices, and the start index of facet k+1.
* For example, passing an IndexedPolyface's _facetStart array into this method reverses every facet.

Returns - void

Defined in

Last Updated: 16 April, 2024