VMD-L Mailing List

From: Todd J. Furlong (tfurlong_at_deltasearchlabs.com)
Date: Mon May 13 2002 - 11:20:57 CDT

I see in the code that transparency is implemented using the "screen
door" method with glPolygonStipple rather than using the alpha channel.
     I assume this was done because it is faster, but is there another
reason? Maybe having the option for either method would be a desirable
feature of VMD 1.8?

-Todd

John Stone wrote:
> Hi,
> To use the draw or graphics commands with your own materials,
> you first need to define your material with the material editor
> if you're not using one of the two default materials "Opaque" and
> "Transparent". Once the materials are defined, you can use a command
> like this to draw things with that material property (case sensitive):
> draw material Transparent
>
> Or for your own material name:
> draw material MyNeatoMaterial
>
> If you need to have graphics objects with different materials, then you'll
> need to use the "graphics" commands with ID tags to differentiate which
> one you're working on, etc. This is documented in the User's guide
> here:
> http://www.ks.uiuc.edu/Research/vmd/vmd-1.7.1/ug/node167.html
>
> The graphics/drawing interface is changing slightly for VMD 1.8, but
> if you do your work on VMD 1.7.1 it should be easy to update later.
>
> Enjoy,
> John Stone
> vmd_at_ks.uiuc.edu
>
> On Fri, May 10, 2002 at 11:46:01AM -0500, tripp_at_fis.unam.mx wrote:
>
>>Hi L,
>>
>>this is a simple question, but nothing seems to work;
>>how can I draw a transparent cylinder?
>>
>>I'm using VMD 1.7.1 in redhat
>>
>>thx
>
> 

-- 
Todd J. Furlong
Visualization Engineer
Delta Search Labs
400 Technology Square
Cambridge, MA 02139
617.551.4607
617.551.4651