CRect::IntersectRect
Makes a CRect equal to the intersection of two existing rectangles.
BOOL IntersectRect(
LPCRECT lpRect1,
LPCRECT lpRect2
) throw( );
Parameters
lpRect1
Points to a RECT structure or CRect object that contains a source rectangle.lpRect2
Points to a RECT structure or CRect object that contains a source rectangle.
Return Value
Nonzero if the intersection is not empty; 0 if the intersection is empty.
Remarks
The intersection is the largest rectangle contained in both existing rectangles.
备注
Both of the rectangles must be normalized or this function may fail. You can call NormalizeRect to normalize the rectangles before calling this function.
Example
CRect rectOne(125, 0, 150, 200);
CRect rectTwo(0, 75, 350, 95);
CRect rectInter;
rectInter.IntersectRect(rectOne, rectTwo);
// rectInter is now (125, 75, 150, 95)
ASSERT(rectInter == CRect(125, 75, 150, 95));
// operator &= can do the same task:
CRect rectInter2 = rectOne;
rectInter2 &= rectTwo;
ASSERT(rectInter2 == CRect(125, 75, 150, 95));
Requirements
Header: atltypes.h