RectangleF.Intersect 方法
定義
重要
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決定 RectangleF 兩個矩形交點的結構。
多載
| 名稱 | Description |
|---|---|
| Intersect(RectangleF) |
以自身與指定RectangleF結構的交集取代此RectangleF結構。 |
| Intersect(RectangleF, RectangleF) |
回傳 RectangleF 一個代表兩個矩形交點的結構。 若無交叉點，則返回空 RectangleF 值。 |
Intersect(RectangleF)
以自身與指定RectangleF結構的交集取代此RectangleF結構。
public:
void Intersect(System::Drawing::RectangleF rect);public void Intersect(System.Drawing.RectangleF rect);member this.Intersect : System.Drawing.RectangleF -> unitPublic Sub Intersect (rect As RectangleF)參數
- rect
- RectangleF
矩形要相交。
適用於
Intersect(RectangleF, RectangleF)
回傳 RectangleF 一個代表兩個矩形交點的結構。 若無交叉點，則返回空 RectangleF 值。
public:
static System::Drawing::RectangleF Intersect(System::Drawing::RectangleF a, System::Drawing::RectangleF b);public static System.Drawing.RectangleF Intersect(System.Drawing.RectangleF a, System.Drawing.RectangleF b);static member Intersect : System.Drawing.RectangleF * System.Drawing.RectangleF -> System.Drawing.RectangleFPublic Shared Function Intersect (a As RectangleF, b As RectangleF) As RectangleF參數
一個要交叉的矩形。
一個要交叉的矩形。
傳回
第三個 RectangleF 結構大小代表兩個指定矩形的重疊面積。
範例
此範例設計用於 Windows Forms，並需要 PaintEventArgse，一個 OnPaint 事件物件。 程式碼會產生兩個 RectangleF 物件，並以黑紅兩色繪製到螢幕上。 請注意，這些畫必須被轉換成 Rectangle 繪圖用的物件。 接著程式碼會用這個RectangleF方法產生第三Intersect個，轉換成 Rectangle，然後用藍色畫到螢幕上。 注意第三個（藍色）矩形是另外兩個矩形的重疊面積：
public:
void RectangleFIntersectExample( PaintEventArgs^ e )
{
// Create two rectangles.
RectangleF firstRectangleF = RectangleF(0,0,75,50);
RectangleF secondRectangleF = RectangleF(50,20,50,50);
// Convert the RectangleF structures to Rectangle structures and draw them to the
// screen.
Rectangle firstRect = Rectangle::Truncate( firstRectangleF );
Rectangle secondRect = Rectangle::Truncate( secondRectangleF );
e->Graphics->DrawRectangle( Pens::Black, firstRect );
e->Graphics->DrawRectangle( Pens::Red, secondRect );
// Get the intersection.
RectangleF intersectRectangleF = RectangleF::Intersect( firstRectangleF, secondRectangleF );
// Draw the intersectRectangleF to the screen.
Rectangle intersectRect = Rectangle::Truncate( intersectRectangleF );
e->Graphics->DrawRectangle( Pens::Blue, intersectRect );
}
public void RectangleFIntersectExample(PaintEventArgs e)
{
// Create two rectangles.
RectangleF firstRectangleF = new RectangleF(0, 0, 75, 50);
RectangleF secondRectangleF = new RectangleF(50, 20, 50, 50);
// Convert the RectangleF structures to Rectangle structures and draw them to the
// screen.
Rectangle firstRect = Rectangle.Truncate(firstRectangleF);
Rectangle secondRect = Rectangle.Truncate(secondRectangleF);
e.Graphics.DrawRectangle(Pens.Black, firstRect);
e.Graphics.DrawRectangle(Pens.Red, secondRect);
// Get the intersection.
RectangleF intersectRectangleF =
RectangleF.Intersect(firstRectangleF,
secondRectangleF);
// Draw the intersectRectangleF to the screen.
Rectangle intersectRect =
Rectangle.Truncate(intersectRectangleF);
e.Graphics.DrawRectangle(Pens.Blue, intersectRect);
}
Public Sub RectangleFIntersectExample(ByVal e As PaintEventArgs)
' Create two rectangles.
Dim firstRectangleF As New RectangleF(0, 0, 75, 50)
Dim secondRectangleF As New RectangleF(50, 20, 50, 50)
' Convert the RectangleF structures to Rectangle structures and
' draw them to the screen.
Dim firstRect As Rectangle = Rectangle.Truncate(firstRectangleF)
Dim secondRect As Rectangle = Rectangle.Truncate(secondRectangleF)
e.Graphics.DrawRectangle(Pens.Black, firstRect)
e.Graphics.DrawRectangle(Pens.Red, secondRect)
' Get the intersection.
Dim intersectRectangleF As RectangleF = _
RectangleF.Intersect(firstRectangleF, secondRectangleF)
' Draw the intersectRectangleF to the screen.
Dim intersectRect As Rectangle = _
Rectangle.Truncate(intersectRectangleF)
e.Graphics.DrawRectangle(Pens.Blue, intersectRect)
End Sub
