VMD-L Mailing List

From: YangMingjun (mjyang_at_dicp.ac.cn)
Date: Sat Apr 25 2009 - 04:30:40 CDT

Thanks for all the suggestions.
But when I use the command:
tachyon -res 2048 2048 -rescale_lights 0.4 -add_skylight 0.7 inputscene.dat -o outputimage.tga -aasamples 8

The produced figure showed a modified ratio btw width and length, resulting in an strange view of the original figure. Should I ajust the two parameters of -res to the original length and width of my figure?

Many thanks.

Mingjun

>On Fri, 2009-04-24 at 23:14 +0800, YangMingjun wrote:
>> Dear VMD users,
>>
>
>> I plot a figure in porcupine style of a protein system in VMD. But
>> when I zoomed in the saved figure, the edge became unclear. Could
>> someone please tell me what to do to plot a figure in publication
>> quality? Can the dpi, e.g. 300dpi, be set when saving the figure?
>
>yes and no. it depends on what renderer option you are using.
>
>> I used the following procedure to save my figures:
>> file -> render -> render using snapshot->ImageMagick:snap.tga-> file -save
>
>in this case your resolution is restricted by the resolution of
>your screen. you can make the OpenGL window as large as possible
>to increase the number of pixels. with other renderers this using
>a correspondingly scaled up number of pixels is needed as well.
>once you have generated a (bitmap) picture you cannot zoom in
>without losing resolution, this is just the nature of bitmap data.
>
>there are some vector output formats, but they are somewhat limited
>and for printing you still need to convert those into bitmaps
>at some point (in the printer at the latest).
>
>cheers,
> axel.
>
>p.s.: please have a close look at the VMD (mini) tutorials. there are
>examples to teach you how to do stunning images with VMD using external
>renderes.
>
>
>
>>
>>
>> many thanks.
>>
>>
>> Mingjun
>>
>
>--
>=======================================================================
>Axel Kohlmeyer akohlmey_at_cmm.chem.upenn.edu http://www.cmm.upenn.edu
> 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.
>
>.