rotateFromVector method

[This documentation is preliminary and is subject to change.]

Post-multiplies the matrix by a specified rotation transformation and returns the resulting matrix.

Scalable Vector Graphics: Coordinate Systems, Transformations and Units, Section 7.14.3Internet Explorer 9

Syntax

ISVGMatrix retVal = object.rotateFromVector(x, y);

Standards information

Parameters

  • x [in]
    Type: float

    The x-coordinate of a vector (x,y) that determines the rotation angle. This coordinate cannot be zero.

  • y [in]
    Type: float

    The y-coordinate of a vector (x,y) that determines the rotation angle. This coordinate cannot be zero.

Remarks

The rotation angle is determined by taking (+/-)arctan(y/x). The direction of the vector (x,y) determines whether the positive or negative angle value is used.

Post-multiplies means that other matrix operations are performed before this operation.

See also

SVGMatrix

 

 

Build date: 1/26/2012