Frankenplotter star and circle - to prove x=minor, y=major works

Having the testxy function draw diamonds was one thing, but I knew it wasn't really exercising the full range of major-minor combinations.  In that case, since the scanner carriage was 11x higher resolution than the printer carriage, it really was only drawing x-major, y-minor vectors.

So, I added two functions: star and circle.  star=n would draw an n-pointed star using a distance specified by the csn=value command.  The inner radius of the star was fixed.  The circle command would take a value representing the number of arcs to draw starting at 0 radians, so circle=4 would produce a square (diamond), circle=8 would give an octagon, and so on.

Results:

Frankenplotter drawing circles and stars

You'll note a couple of things here.  First, there's a line going from the center out to x=radius,y=0.  That's because there's no pen up/down function yet.  Second, the circle doesn't close.  That's because of sloppiness in the pen holder -- lack of rigidity.

Just to be sure I was exercising the x=minor,y=major case, I had Serial.print commands telling me what was going on.