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Graphics.TransformPoints Method (CoordinateSpace, CoordinateSpace, Point[])

Transforms an array of points from one coordinate space to another using the current world and page transformations of this Graphics.

Namespace: System.Drawing
Assembly: System.Drawing (in system.drawing.dll)

public void TransformPoints (
	CoordinateSpace destSpace,
	CoordinateSpace srcSpace,
	Point[] pts
)
public void TransformPoints (
	CoordinateSpace destSpace, 
	CoordinateSpace srcSpace, 
	Point[] pts
)
public function TransformPoints (
	destSpace : CoordinateSpace, 
	srcSpace : CoordinateSpace, 
	pts : Point[]
)
Not applicable.

Parameters

destSpace

Member of the CoordinateSpace enumeration that specifies the destination coordinate space.

srcSpace

Member of the CoordinateSpace enumeration that specifies the source coordinate space.

pts

Array of Point structures that represents the points to transformation.

The following code example is designed for use with Windows Forms, and it requires PaintEventArgse, which is a parameter of the Paint event handler. The code performs the following actions:

  • Creates two points and draws a blue line between them.

  • Sets the world transform to translate by amounts 40 in the x direction and 30 in the y direction.

  • Transforms the points from world coordinates (World) to page coordinates (Page).

  • Resets the world transformation to the identity.

  • Draws a red line between the transformed points.

The result is a blue line and a translated red line below it.

private void TransformPointsPoint(PaintEventArgs e)
{

    // Create array of two points.
    Point[] points = { new Point(0, 0), new Point(100, 50) };

    // Draw line connecting two untransformed points.
    e.Graphics.DrawLine(new Pen(Color.Blue, 3), points[0], points[1]);

    // Set world transformation of Graphics object to translate.
    e.Graphics.TranslateTransform(40, 30);

    // Transform points in array from world to page coordinates.
    e.Graphics.TransformPoints(CoordinateSpace.Page, CoordinateSpace.World, points);

    // Reset world transformation.
    e.Graphics.ResetTransform();

    // Draw line that connects transformed points.
    e.Graphics.DrawLine(new Pen(Color.Red, 3), points[0], points[1]);
}

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

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