如何判断一个点是否在一个RECT内？(2分)

C

cjg325

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• 2002-12-28

• #1

如何判断一个点是否在一个RECT内？

 

Z

zhukewen

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• 2002-12-28

• #2

function ptinRect(p: TPoint;r:TRect): Boolean;
好象是这个函数

 

E

eguan

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• 2002-12-29

• #3

Result := (Point.X >= Rect.Left) and
(Point.X <= Rect.Right) and
(Point.Y >= Rect.Top) and
(Point.Y <= Rect.Bottom);

 

G

giswang

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• 2002-12-30

• #4

dX1,dY1,dX2,dY2 是矩形
function IsPtInRect(dX, dY: Double; dX1,dY1,dX2,dY2 : double):Boolean;
const
dBuf : double = 10e-10;
begin
Result := (dX > MinValue([dX1,dX2])- dBuf) and (dX < MaxValue([dX1,dX2]) + dBuf) and
(dY > MinValue([dY1,dY2]) - dBuf) and (dY < MaxValue([dY1,dY2]) + dBuf);
end;

 

D

doll_paul

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• 2002-12-30

• #5

听一下～

 

L

LiChaoHui

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• 2002-12-30

• #6

同意zhukewen的说法，有函数不用，岂不很傻

 

青

青春无限

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• 2002-12-30

• #7

有办法得一个圆形区域吗?如果可以,又如何判断某点是否在区域内?

 

爱

爱元元的哥哥

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• 2002-12-30

• #8

pTinRegion

 

L

LittleIsland

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• 2002-12-30

• #9

用PtInRect API函数

 

C

cjg325

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• 2003-01-03

• #10

接受答案了.