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From: Cosseddu, Salvatore (S.M.Cosseddu_at_warwick.ac.uk)
Date: Sun Feb 05 2012 - 11:43:11 CST
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Dear John,
Many thanks, this is what I was looking for.
Regards
Salvatore
-- Salvatore Cosseddu PhD student Centre for Scientific Computing and School of Engineering University of Warwick Coventry CV4 7AL United Kingdom email: S.M.Cosseddu_at_warwick.ac.uk -----Original Message----- From: John Stone [mailto:johns_at_ks.uiuc.edu] Sent: Sun 05/02/2012 16:44 To: Cosseddu, Salvatore Cc: vmd-l_at_ks.uiuc.edu Subject: Re: vmd-l: The spheres become oval, getting close to the screen borders Hi, You can either use an Orthographic projection, or you can reduce the perspective effect. To reduce the perspective effect, open the display settings window, and change the "Screen Dist" parameter from -2, to -6 and this will significantly reduce the perspective foreshortening that you see. You can decrease it even further by changing "Screen Dist" to -12 or so. As you change the "Screen Dist" parameter, you'll see that it also has an effect on the field of view, so you'll need to scale or translate your molecule a little bit if you want the same field of view you had before moving the camera's center of projection farther back. Cheers, John Stone vmd_at_ks.uiuc.edu On Sun, Feb 05, 2012 at 03:53:57PM -0000, Cosseddu, Salvatore wrote: > Dear All, > > As a consequence of the perspective view, the spheres (i.g. ions) that > lies on the borders of the OpenGL display assume a oval shape. > > I can not find a way to avoid this problem, even because the shape is > maintained once rendered (tachyonInternal, Pov-ray) > > Regards > Salvatore > > -- > Salvatore Cosseddu > PhD student > > Centre for Scientific Computing and School of Engineering > University of Warwick > Coventry CV4 7AL > United Kingdom > > email: S.M.Cosseddu_at_warwick.ac.uk -- NIH Resource for Macromolecular Modeling and Bioinformatics Beckman Institute for Advanced Science and Technology University of Illinois, 405 N. Mathews Ave, Urbana, IL 61801 http://www.ks.uiuc.edu/~johns/ Phone: 217-244-3349 http://www.ks.uiuc.edu/Research/vmd/ Fax: 217-244-6078
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