Whether ifcType is an IfcFeatureElement subtype (an opening/void/feature operand) that must be excluded from construction projection. undefined/ unknown types are treated as real geometry (not a feature element).
ifcType
IfcFeatureElement
undefined
Whether
ifcTypeis anIfcFeatureElementsubtype (an opening/void/feature operand) that must be excluded from construction projection.undefined/ unknown types are treated as real geometry (not a feature element).