Using Special - Gerber OMEGA CP Reference Manual

Using Special

Special Effects adds or subtracts one overlapping object or group from another to create a new
object. The first object/group is added or subtracted from the second, based upon the chosen
effect. Before choosing Special in the Effects dialog box, use Arrange > Justify to superimpose
one group directly on top of the other.
Using incoming shape groups
All results in Special Effects require the combining of two incoming shape groups. The first
group selected is Shape Group A and the second group selected is Shape Group B. You must
superimpose the shapes for the effect to be successful.
Note: A group can be a single shape or a set of shapes. Select no more than two groups from the
working area when using Special Effects.
Results
Combine incoming Shape Groups A and B for the following results:
♦ A + B ⎯ A and B overlay to create a new shape
♦ B − A ⎯ A and B overlay, and A is removed
♦ B − A (keep) ⎯ A overlays B (keep A)
♦ A − B ⎯ A and B overlay, and B is removed
♦ A − B (keep) ⎯ B overlays A (keep B)
♦ A and B ⎯ A and B overlay; the extraneous parts of both A and B are removed and the
areas common to both remain.
Examples
The following graphics illustrate how the principles are applied to the selected incoming shape
groups.
Shape Group A is the box and Shape Group B is the circle. The first object that you select is
always A.
Combining the shape groups can result in one of the following combinations.
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