Rect::VExpand

inline Rect<T>& VExpand(T v);
inline Rect<T>& VExpand(T t, T b);

Description

VExpand expands the rectangle vertically by subtracting a value from y1 and adding a value to y2. The following expression is used to determine the result:

   (y1, y2) = (y1 - [t, m.Begin, v], y2 + [b, m.End, v])

Parameters

Parameters	Description
T v	A value that is subtracted from y1 and added to y2.
T t	A value that is subtracted from y1.
T b	A value that is added to y2.

Return Value

A Rect reference to the current rectangle that has been vertically expanded.