Creating two solid blocks, both possessing the same origin point. One has positive edge length values, the other negative edge lengths.
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$$ Declarations
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ENTITY/BLOCK1,BLOCK2
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$$ Geometry Definition
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BLOCK1 = SOLBLK/ORIGIN,1,3,2,SIZE,1,2,.5
BLOCK2 = SOLBLK/ORIGIN,1,3,2,SIZE,-1,-2,-.5
Solid Blocks Created Using Positive vs. Negative Edge Lengths