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#ifndef RECTANGLEUTIL_HH
#define RECTANGLEUTIL_HH
namespace RectangleUtil {
inline bool insideRectangle(int x, int y, int width, int height, int px, int py) {
return
px >= x &&
px < (x + width) &&
py >= y &&
py < (y + height);
}
/*
* Determines if a point is inside a rectangle-like objects border.
* @param rect A rectangle-like object that has accessors for x, y, width, and
* height.
* @param x
* @param y
* @param border The size of the border.
* @returns true if point is inside the rectangle-like object.
*/
template <typename RectangleLike>
bool insideBorder(const RectangleLike& rect,
int x, int y,
int border) {
const int w = static_cast<int>(rect.width()) - border;
const int h = static_cast<int>(rect.height()) - border;
return insideRectangle(rect.x() + border, rect.y() + border, w, h, x, y);
}
/*
* Determines if rectangle 'a' overlaps rectangle 'b'
* @returns true if 'a' overlaps 'b'
*
* outside overlap situations
*
* a----a a----a a--------a b--------b
* | | b----b | b-+--b | b----b | | a----a |
* a----a | | a--+-a | | | | | | | | |
* b----b b----b | b----b | | a----a |
* a--------a b--------b
*
*/
inline bool overlapRectangles(
int ax, int ay, int awidth, int aheight,
int bx, int by, int bwidth, int bheight) {
bool do_not_overlap =
ax > (bx + bwidth)
|| bx > (ax + awidth)
|| ay > (by + bheight)
|| by > (ay + aheight);
return !do_not_overlap;
}
/*
* Determines if rectangle 'a' overlaps rectangle 'b'
* @param a - rectangle a
* @param b - rectangle b
* @returns true if 'a' overlaps 'b'
*/
template <typename RectangleLikeA, typename RectangleLikeB>
bool overlapRectangles(const RectangleLikeA& a, const RectangleLikeB& b) {
return overlapRectangles(
a.x(), a.y(), a.width(), a.height(),
b.x(), b.y(), b.width(), b.height());
}
} // namespace RectangleUtil
#endif // RECTANGLEUTIL_HH
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