Matrix::RotateAt method (gdiplusmatrix.h)

The Matrix::RotateAt method updates this matrix with the product of itself and a matrix that represents rotation about a specified point.

Syntax

Status RotateAt(
  [in]      REAL           angle,
  [in, ref] const PointF & center,
  [in]      MatrixOrder    order
);

Parameters

[in] angle

Type: REAL

Real number that specifies the angle of rotation in degrees. Positive values specify clockwise rotation.

[in, ref] center

Type: const PointF

Reference to a PointF object that specifies the center of the rotation. This is the point about which the rotation takes place.

[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.

Requirements

See also

Global and Local Transformations

Matrix

Matrix Representation of Transformations

Matrix::Multiply

Matrix::Rotate

Matrix::Scale

Matrix::Shear

Matrix::Translate

MatrixOrder

Transformations