RotateLayer(id, angle[, smooth])
id by the specified angle
(in degrees). A positive angle rotates anti-clockwise, a negative angle
rotates clockwise. Additionally, you can choose to have the rotated
graphics interpolated by passing True in the smooth argument. The graphics
will then be rotated using anti-alias.
If the specified layer is a vector layer (e.g. circle, polygon, TrueType
text or a rectangle) Hollywood will rotate the layer
without any loss in quality because vector graphics can be freely
transformed. Thus, the smooth argument does not have any function if
the specified layer is a vector layer. If the layer uses raster graphics,
however, normal raster-based rotation will be used.
In contrast to rotating brushes using RotateBrush() layers always keep
their original data so there will not be any loss in quality if you
rotate a layer forth by some degrees and then back by the same degrees.
This is perfectly possible and does not generate any quality losses with
RotateLayer().