===== Operations ===== All shapes (primitives or the results of operations) can be passed to special functions to perform logical operations, e.g. removing a hole from a board. In all cases, the operation returns the results, and **never** changes the original shapes. {{page>design_guide_union}} {{page>design_guide_intersect}} {{page>design_guide_subtract}} {{page>design_guide_hull}} {{page>design_guide_chain_hull}} {{page>design_guide_scission}}