# PathGradientBrush::RotateTransform method (gdipluspath.h)

The **PathGradientBrush::RotateTransform** method updates this brush's current transformation matrix with the product of itself and a rotation matrix.

## Syntax

```
Status RotateTransform(
[in] REAL angle,
[in] MatrixOrder order
);
```

## Parameters

`[in] angle`

Type: **REAL**

Real number that specifies the angle of rotation in degrees.

`[in] order`

Type: **MatrixOrder**

Optional. Element of the MatrixOrder enumeration that specifies the order of the multiplication. MatrixOrderPrepend specifies that the rotation matrix is on the left, and MatrixOrderAppend specifies that the rotation matrix is on the right. The default value is MatrixOrderPrepend.

## Return value

Type: **Status**

If the method succeeds, it returns **Ok**, which is an element of the
Status enumeration.

If the method fails, it returns one of the other elements of the Status enumeration.

## Remarks

A single 3 ×3 matrix can store any sequence of affine transformations. If you have several 3 ×3 matrices, each of which represents an affine transformation, the product of those matrices is a single 3 ×3 matrix that represents the entire sequence of transformations. The transformation represented by that product is called a composite transformation. For example, suppose matrix T represents a translation and matrix R represents a rotation. If matrix M is the product TR, then matrix M represents a composite transformation: first translate, then rotate.

#### Examples

The following example creates a
PathGradientBrush object based on a triangular path. The calls to the PathGradientBrush::ScaleTransform and **PathGradientBrush::RotateTransform** methods of the
**PathGradientBrush** object set the elements of the brush's transformation matrix so that it represents a composite transformation: first scale, then rotate. The code uses the path gradient brush twice to paint a rectangle: once before the transformation is set and once after the transformation is set.

```
VOID Example_RotateTransform(HDC hdc)
{
Graphics graphics(hdc);
// Create a path gradient brush based on an array of points.
Point pts[] = {Point(0, 0), Point(50, 0), Point(50, 50)};
PathGradientBrush pthGrBrush(pts, 3);
// Fill an area with the path gradient brush (no transformation).
graphics.FillRectangle(&pthGrBrush, 0, 0, 500, 500);
pthGrBrush.ScaleTransform(3.0f, 1.0f); // first scale
pthGrBrush.RotateTransform(60.0f, MatrixOrderAppend); // then rotate
// Fill the same area with the transformed path gradient brush.
graphics.FillRectangle(&pthGrBrush, 0, 0, 500, 500);
}
```

## Requirements

Minimum supported client |
Windows XP, Windows 2000 Professional [desktop apps only] |

Minimum supported server |
Windows 2000 Server [desktop apps only] |

Target Platform |
Windows |

Header |
gdipluspath.h (include Gdiplus.h) |

Library |
Gdiplus.lib |

DLL |
Gdiplus.dll |

## See also

Filling a Shape with a Color Gradient

Matrix Representation of Transformations

PathGradientBrush::GetTransform

PathGradientBrush::MultiplyTransform

PathGradientBrush::ResetTransform

PathGradientBrush::ScaleTransform

PathGradientBrush::SetTransform