Contents

azimuthUnitVector(in:)

Returns a unit vector that points in the direction of the azimuth of the stylus.

Declaration

func azimuthUnitVector(in view: UIView?) -> CGVector

Parameters

  • view:

    The view that contains the stylus’s touch. Pass nil to get the unit vector for the azimuth that is relative to the touch’s window.

Return Value

The unit vector that points in the direction of the azimuth of the stylus.

Discussion

It is less expensive to get the azimuth unit vector than the azimuth angle. If you’re creating transform matrices, the unit vector can also be more useful.

See Also

Getting touch attributes