rotateFromVector method

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

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

Syntax

var retval = SVGMatrix.rotateFromVector(x, y);

Parameters

x [in]

Type: Floating-point

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

y [in]

Type: Floating-point

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

Return value

Type: ISVGMatrix

The resulting matrix.

Standards information

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

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.