API Reference › core-geometry› Polyface › PolyfaceQuery › IsPolyfaceManifold

isPolyfaceManifold MethodStatic

Test edge pairing in source mesh.

  • Any edge with 3 or more adjacent facets triggers false return.
  • Any edge with 2 adjacent facets in the same direction triggers false return.
  • Null edges are ignored.

isPolyfaceManifold(source: PolyfaceVisitor | Polyface, allowSimpleBoundaries: boolean = false): boolean

Parameter Type Description
source PolyfaceVisitor | Polyface facet set to examine
allowSimpleBoundaries boolean if false (default), a return value of true means the facets form a closed
2-manifold surface; if true, a return value of true means the facets form a 2-manifold surface which may
have a boundary, but is still properly matched internally.

Returns - boolean

Defined in

Last Updated: 30 October, 2025