- Box(unsigned int x1_, unsigned int x2_,
- unsigned int y1_, unsigned int y2_) :
- x1(x1_), x2(x2_), y1(y1_), y2(y2_) {}
+ /// Zero-initialise the member variables.
+ Box();
+ /// Initialise the member variables.
+ Box(int x1_, int x2_, int y1_, int y2_);