Object model transformations - WO2021011077A1

Abstract

An example method, performed by processing circuitry, includes receiving an object model describing a geometry of a three-dimensional object to be generated by additive manufacturing. A geometrical transformation to be applied to the object model is determined. A first object portion comprising a surface feature of less than a threshold size and a second object portion free of such a surface feature is identified and a transformed model describing a volume containing a modified version of the object as a plurality of contiguous, non-overlapping sub-volumes is determined. Each sub-volume may be categorised as being interior to the object model, exterior to the object model, or a as a boundary sub-volume which spans an object boundary. The modified version of the object is determined by applying the geometrical transformation in the second object portion and not applying the geometrical transformation in the first object portion.