API Reference > geometry-core > Polyface > PolyfaceQuery > computePrincipalVolumeMoments computePrincipalVolumeMoments MethodStatic Compute area moments for the mesh. In the returned MomentData: origin is the centroid. localToWorldMap has the origin and principal directions radiiOfGyration radii for rotation around the x,y,z axes. The result is only valid if the mesh is closed. There is no test for closure. Use PolyfaceQuery.isPolyfaceClosedByEdgePairing(polyface) to test for closure. computePrincipalVolumeMoments(source: Polyface): undefined | MomentData Parameter Type Description source Polyface Returns - undefined | MomentData Defined in polyface/PolyfaceQuery.ts Line 235 Last Updated: 11 June, 2024