sketch.set.block.create
Syntax
Create a block from points with ID i1, i2, i3, etc. A minimum 3 points are required. For irregular blocks, only points on the external boundary have to be specified—internal boundaries are detected automatically. Points may be provided in any order.
bp - block pointer
sp - sketch set pointer
i1 - first point ID (alternately, point pointer)
i2 - second point ID (alternately, point pointer)
i3 - third point ID (alternately, point pointer)
sketch.set.badzones
sketch.set.block.delete
9.1.13