What is it ? :
This transform draw a spiral of arbitrary regular polygons. The polygon are rotated of a definite angle at each iteration and are sized such as the vertices of each lie on the sides of the previous one (ie they are in a way "tangent" to each other).
The Parameters :
Order : The number of side of the regular polygon.
Angle step : The angle the polygon will be rotated at each iteration.
Mapping Center/Rotation/Magnification : To specify which part of the underlying image will be mappped on the polygons.
Color Number : The number of colors used in the "Color" mode (see above).
Outside : How the outside of the first polygon will look like. "Standard"
diplay the underlying image and "Solid" assign solid color to outside points.
"Old" is kept for backward compatibility.