|
|
|
|
MGL_unionRegion
Computes the Boolean union of two regions.
Declaration
ibool MGLAPI MGL_unionRegion(
region_t *r1,
const region_t *r2)
Prototype In
mgraph.h
Parameters
r1 |
Region with which r2 is unioned, and also becomes the result region. |
r2 |
Region to be unioned with r1 |
Return Value
True if the union is valid, false if an empty region was created.
Description
Computes the Boolean union of two regions for the area covered by region r1 and region r2, 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
MGL_diffRegion, MGL_sectRegion, MGL_unionRegionOfs, MGL_unionRegionRect
Copyright © 2002 SciTech Software, Inc. Visit our web site at http://www.scitechsoft.com