Region Video::ClippedDrawingRect(const Region& target, const Region* clip) const
{
Region r = target.Intersect(screenClip);
if (clip) {
// Intersect clip with both screen and target rectangle
r = clip->Intersect(r);
}
// the clip must be "safe". no negative values or crashy crashy
if (r.Dimensions().IsEmpty()) { // logically equivalent to no intersection
r.h = 0;
r.w = 0;
}
return r;
}
bool Robot::intersects( const Region& aRegion) const
{
Region region = getRegion();
region.Intersect( aRegion);
return !region.IsEmpty();
}
