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We introduce Curvy-an interactive design tool to generate varying densitysupport structures for 3D printing. Support structures are essential forprinting models with extreme overhangs. Yet, they often cause defects oncontact areas, resulting in poor surface quality. Low-level design of supportstructures may alleviate such negative effects. However, it is tedious andunintuitive for novice users as it is hard to predict the impact of changes tothe support structure on the final printed part. Curvy allows users to definetheir high-level preferences on the surface quality directly on the targetobject rather than explicitly designing the supports. These preferences arethen automatically translated into low-level design parameters to generate thesupport structure. Underlying novel curvy zigzag toolpathing algorithm usesthese instructions to generate varying density supports by altering the spacingbetween individual paths in order to achieve prescribed quality. Combined withthe build orientation optimization, Curvy provides a practical solution to thedesign of support structures with minimal perceptual or functional impact onthe target part to be printed.

Curvy: An Interactive Design Tool for Varying Density Support Structures