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COMMON: Add function to find the intersecting rectangle

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This commit is contained in:
Matthew Hoops 2011-09-17 12:02:15 -04:00
parent da74436aa4
commit 3b9ab4f5cf
1 changed files with 14 additions and 0 deletions
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14
common/rect.h
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@ -169,6 +169,20 @@ struct Rect {
return (left < r.right) && (r.left < right) && (top < r.bottom) && (r.top < bottom); return (left < r.right) && (r.left < right) && (top < r.bottom) && (r.top < bottom);
} }
/**
* Find the intersecting rectangle between this rectangle and the given rectangle
*
* @param r the intersecting rectangle
*
* @return the intersection of the rectangles or an empty rectangle if not intersecting
*/
Rect findIntersectingRect(const Rect &r) const {
if (!intersects(r))
return Rect();
return Rect(MAX(r.left, left), MAX(r.top, top), MIN(r.right, right), MIN(r.bottom, bottom));
}
/** /**
* Extend this rectangle so that it contains r * Extend this rectangle so that it contains r
* *