diff options
Diffstat (limited to 'common/rect.h')
| -rw-r--r-- | common/rect.h | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/common/rect.h b/common/rect.h index 768d1ebbb9..8d1243f7e4 100644 --- a/common/rect.h +++ b/common/rect.h @@ -170,6 +170,20 @@ struct Rect { } /** + * 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 * * @param r the rectangle to extend by @@ -244,11 +258,11 @@ struct Rect { /** * Create a rectangle around the given center. + * @note the center point is rounded up and left when given an odd width and height */ static Rect center(int16 cx, int16 cy, int16 w, int16 h) { - w /= 2; - h /= 2; - return Rect(cx - w, cy - h, cx + w, cy + h); + int x = cx - w / 2, y = cy - h / 2; + return Rect(x, y, x + w, y + h); } }; |