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

See Also

Reference

CRect Class

Hierarchy Chart

CRect::operator &=

CRect::operator &

CRect::UnionRect

CRect::SubtractRect

CRect::NormalizeRect

IntersectRect

Other Resources

CRect Members