Tom's POVRay Bolt Cup
The picture above was made with this
demo POV file and
this bolt object POV file
About this Object
This coffee cup is based on a real one which I own, made of molded
ceramic, to look as if the handle is a U-bolt which was bolted on to the
cup. The real cup has a rubber cap that covers the bottom, with a
corrugated look that I simulated with a bunch of torusses. The interior
of the cup is particularly nice, because it widens out at the top, making
the cup wall thinner, but smoothly transitions into the cylinder below,
by joining the cylinder and the cone with a torus.
The origin lies at the bottom center of the cup, with the handle extending
in the positive X direction. The cup is 3 and 1/4 units in diameter,
and 3 and 3/4 units high (the units correspond to inches in the real cup).
The handle protrudes 1 and 3/16 units out of the cup, and the
bolts protrude by 1/2 unit.
Problems and Future Work
The biggest problem is the top of the cup. I was lazy and didn't do
the math, and just stuck two toruses next to each other to sort of
round it out. The torus don't meet on top, and the inner torus doesn't
perfectly match the cone of the inside of the cup. I need to put a
single torus there, and mash it flat a bit to get the right shape.
The underside of the cup is not finished. The screw threads turn in the
wrong direction, and there is no rounding or gusseting around the nuts.
This web page, the associated image(s), and POV files are all copyright
2004 by Thomas A. Fine (that's me!). I hereby grant free distribution
rights, including for-profit uses, in full or in part, provided only
that copyright notices are preserved and due credit is given.
WARNING: This POV object is based on a real object. I'm not aware of
any legal issues related to the design of that real object. It is the
user's responsibility to cover your ass.