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DiffRegion
Compute the Boolean difference of two regions.
Declaration
ibool NAPI GA_regionFuncs::DiffRegion(
GA_region *r1,
const GA_region *r2)
Prototype In
snap/graphics.h
Parameters
r1 |
Region from which r2 is subtracted, which also becomes the result region. |
r2 |
Region to be subtracted from r1 |
Return Value
True if the difference is valid, false if an empty region was created.
Description
Computes the Boolean difference of two regions by subtracting the area covered by region r2 from region r1, computing the resulting region in r1, which may result in an empty region. If you need to retain the value of r1, you need to first copy r1 to a temporary region.
See Also
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