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...Sketch it make freehand drawing for precise rapid fabrication gabriel g johnson ellen yi luen do mark d gross jason i hong june cmu hcii human computer interaction institute school of science carnegie mellon university pittsburgh pa college fine arts georgia technology atlanta ga usa colorado boulder co keywords sketching design tools constraints abstract we present simi a tool designing models provides novel recognition and disambiguation architecture that supports designers in using pen based techniques without requiring users to enter persistent modes the suite let designer fluidly transition from rough ideas output within single these are creating geometry issuing gestures edit model enforcing maintaining geometric demonstrated this system could be applied more broadly other domains including modeling or graphic...