API Reference > geometry-core > Polyface > PolyfaceQuery > partitionFacetIndicesByVisibilityVector partitionFacetIndicesByVisibilityVector MethodStatic Examine the normal orientation for each faces. Separate to 3 partitions: facets with normal in the positive direction of the vectorToEye (partition 0) facets with normal in the negative direction of the vectorToEye (partition 1) facets nearly perpendicular to the view vector (partition 2) Return array of arrays of facet indices. partitionFacetIndicesByVisibilityVector(polyface: Polyface | PolyfaceVisitor, vectorToEye: Vector3d, sideAngleTolerance: Angle): number[][] Parameter Type Description polyface Polyface | PolyfaceVisitor vectorToEye Vector3d sideAngleTolerance Angle Returns - number[][] Defined in core/geometry/src/polyface/PolyfaceQuery.ts Line 417 Last Updated: 13 June, 2024