Interactive sculpting is the process by which a designer canimpose free form shape changes on the object being designed. It haspotential applications in fields like computer aided geometric designand rapid prototyping. Our approach to interactive sculpting is throughthe intermediate step of interactive virtual machining (IVM). IVM is asubset of interactive sculpting in that the degrees of freedom availableto the sculptor are reduced. The goal of our work is to demonstrate thefeasibility of interactive virtual machining on a shared memorymultiprocessor workstation. Our prototype IVM system uses a voxel basedapproach. It provides common machining tools to the user and usesMinkowski operations (P.K. Ghosh, 1993) to implement those tools.Parallel implementation of the virtual machining tools has shown thatsculpting with 2563 voxel array is possible with frame rateof around 20 frames/sec. We present the parallel algorithms for virtualmachining tools and the results of implementation on a shared memorymultiprocessor environment
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