regular polygon
It is tried to animate the points attribute of a polygon showing regular polygons.
The initial polygon is given in red in the background for comparison, always covered
by the blue polygon.
The polygon is animated without explicitly setting calcMode to discrete,
Because for SVGT1.2 it is noted
"A 'polygon' element must be rendered in a way that produces the same result
as if the following path were specified instead"
the same rules as for a path has to be applied, the animation specification
must be ignored as unsupported.
In SVG 1.1 correct behaviour would be a discrete animation due to the general rules
to determine the calcMode.