# Matrix3x2F::Rotation method (d2d1helper.h)

Creates a rotation transformation that has the specified angle and center point.

## Syntax

``````Matrix3x2F Rotation(
FLOAT         angle,
D2D1_POINT_2F center
);
``````

## Parameters

`angle`

Type: FLOAT

The rotation angle in degrees. A positive angle creates a clockwise rotation, and a negative angle creates a counterclockwise rotation.

`center`

Type: D2D1_POINT_2F

The point about which the rotation is performed.

## Return value

Type: Matrix3x2F

The new rotation transformation.

## Remarks

When calling this method, specify a centerPoint to rotate the object about, and the rotation angle in degrees. The following illustration shows a square rotated 45 degrees about its center point.

#### Examples

The following example uses the D2D1::Matrix3x2F::Rotation method to create a rotation matrix that rotates a square clockwise 45 degrees about the center of the square and passes the matrix to the SetTransform method of the render target (m_pRenderTarget).

The following illustration shows the effect of applying the preceding rotation transformation to the square. The original square is a dotted outline, and the rotated square is a solid outline.

``````    // Create a rectangle.
D2D1_RECT_F rectangle = D2D1::Rect(438.0f, 301.5f, 498.0f, 361.5f);

// Draw the rectangle.
m_pRenderTarget->DrawRectangle(
rectangle,
m_pOriginalShapeBrush,
1.0f,
m_pStrokeStyleDash
);

// Apply the rotation transform to the render target.
m_pRenderTarget->SetTransform(
D2D1::Matrix3x2F::Rotation(
45.0f,
D2D1::Point2F(468.0f, 331.5f))
);

// Fill the rectangle.
m_pRenderTarget->FillRectangle(rectangle, m_pFillBrush);

// Draw the transformed rectangle.
m_pRenderTarget->DrawRectangle(rectangle, m_pTransformedShapeBrush);

``````

Code has been omitted from this example. For more information about transforms, see the Transforms Overview.

## Requirements

Minimum supported client Windows 7, Windows Vista with SP2 and Platform Update for Windows Vista [desktop apps | UWP apps]
Minimum supported server Windows Server 2008 R2, Windows Server 2008 with SP2 and Platform Update for Windows Server 2008 [desktop apps | UWP apps]
Target Platform Windows