CRect::IntersectRect

Статья
10/16/2008

Makes a CRect equal to the intersection of two existing rectangles.

BOOL IntersectRect( 
   LPCRECT lpRect1, 
   LPCRECT lpRect2  
) throw( );

Параметры

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.

Возвращаемое значение

Nonzero if the intersection is not empty; 0 if the intersection is empty.

Заметки

The intersection is the largest rectangle contained in both existing rectangles.

Примечание.
Both of the rectangles must be normalized or this function may fail. You can call NormalizeRect to normalize the rectangles before calling this function.

Пример

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));