+- filled/outlined ellipses and elliptical arcs
+
+ Complexities include:
+
+ a) when drawing a pie segment, are the angles specified the real
+ angles (since the scaling changes the angles if you just use sin() and
+ cos() directly) or the angle before scaling? I can see cases where
+ both are useful.
+
+ b) can you control the angles of the axes of symmetry? (the axes would
+ remain at right angles to each other) Does this change the effect of
+ the d1 and d2 parameters?
+