VMD-L Mailing List

From: Peter Freddolino (petefred_at_ks.uiuc.edu)
Date: Sat Apr 25 2009 - 07:30:04 CDT

You should adjust the length and width to have the same aspect ratio as
your original figure, but you can make the figure as big as you want as
long as you scale it symmetrically.
Peter

YangMingjun wrote:
> 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.
>>
>> .
>>
>
>