From: Axel Kohlmeyer (
Date: Mon Jan 29 2007 - 21:31:50 CST

On Mon, 29 Jan 2007, Rob wrote:

R> Hi,
R> I have a molecular system, a kind of modified
R> graphite structure.
R> I'd like to add a plane to the picture; a transparent
R> plane, which helps see the symmetry of the structure.

R> Is that possible? If yes, what would be the easiest
R> way to do this?

if your plane is along the x-, y-, or z-axis
the fastest would probably be to add a volume-slice
representation and use a transpared material.

alternatively you can construct a plane easily from
two triangles.

R> E.g. I can specify a plane like p.r + c = 0,
R> with p is a unit-length vector, c is a constant
R> and r is a vector in space.

that would be somewhat inconvenient as you cannot
have infinitely large objects... ;-)

if you program a function for it, please consider doing
at in a way, that it can be used with VMD's draw command.

see a few examples at:


R> I'd appreciate if someone could give me a hint how
R> this might work with VMD.
R> Thanks,
R> Rob.
R> ____________________________________________________________________________________
R> Don't get soaked. Take a quick peak at the forecast
R> with the Yahoo! Search weather shortcut.

Axel Kohlmeyer
   Center for Molecular Modeling   --   University of Pennsylvania
Department of Chemistry, 231 S.34th Street, Philadelphia, PA 19104-6323
tel: 1-215-898-1582,  fax: 1-215-573-6233,  office-tel: 1-215-898-5425
If you make something idiot-proof, the universe creates a better idiot.