[PyMOL] Questions & comments about CGO objects

[<gre...@un...>]

Hi list !

I was just building (successfully) my first CGO object, and I have three
questions and two comment:

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Questions:

1) what is the difference between LINES, LINE_LOOP, LINE_STRIP. If I
understood correctly, LINES is to build single lines,

LINE_LOOP will connect the first and the last point (VERTEX), but no =
clue
about LINE_STRIP.

2) what is the difference between TRIANGLES, TRIANGLES_STRIP and
TRIANGLE_FAN

3) is it possible to render a plain polygon (I suppose I can build a
succession of triangles, but is there another way to do it?)

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Comments:

1) in the Pymol manual, I read that LINEWIDTH was for=85 line-width, and
WIDTHSCALE was for ray-tracing;

but what I observed is that LINEWIDTH do not change the line thickness
(always 1 pixel) in the normal view but in ray-traced images,
and when I use WIDTHSCALE Pymol simply crashes during ray-tracing=85 Is =
this a
bug? I use the latest version of Pymol with=20
WinXP Pro SP2 and my graphic card is an ATI Radeon 9700 with the latest
drivers.

2) when you use the COLOR command in a CGO object, this color cannot be
overridden with the color menu in Pymol, so simply

don=92t use the COLOR command if you want to be able to change the color =
of
your object within Pymol!

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Many thanks for your answer(s)!

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Gr=E9gori Gerebtzoff

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Division of Biophysical Chemistry

Biozentrum, University of Basel

Klingelbergstrasse 70

CH-4056 Basel / Switzerland

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Tel: +41 61 267 21 92

Fax: +41 61 267 21 89

e-mail: gre...@un...