Re: Molecule of the Month - january 2000 (VRML problems)
Hi,
Hello Paul, hello ChemWeb useres,
I have developed the tool (VRML File Creator for Chemical Structures) which Paul has used to create the VRML scene of the DNA. The VRML scene includes a switch node to change between the various display styles. However IMHO it is not necessary to display the structure in all of these display styles. The 'Capped' styles shows all important things of the DNA. Paul please create another VRML scene of the DNA but only in the capped display style. This WRL file should be much smaller than 1.3 MB. You can add this file as an alternative smaller VRML scene.
Ok, I'll make a capped version of it sometime tis week. On the subject of large VRML files, is there a list which shows which of the popular VRML viewers support gzipped VRML files? If most of them do, then there's no danger in using the gzipped files. But if Cosmoplayer is the only one that supports gzipped files, we'll have to make do with the full (large) files in order to allow everyone to see the files. Regards, ----------------------------------------------------------------------------- Dr Paul May, School of Chemistry, University of Bristol, UK tel: +44 (0)117 928-9927, fax: +44 (0)117 925-1295 <mailto:paul.may@bris.ac.uk> Home URL: <http://www.bris.ac.uk/Depts/Chemistry/staff/pwm.htm> Molecule of the Month: <http://www.bristol.ac.uk/Depts/Chemistry/MOTM/motm.htm> "Nobody in football should be called a genius. A genius is a guy like Norman Einstein" Football commentator Joe Theismann ------------------------------------------------------------------------------ chemweb: A list for Chemical Applications of the Internet. To post to list: mailto:chemweb@ic.ac.uk Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To (un)subscribe, mailto:majordomo@ic.ac.uk the following message; (un)subscribe chemweb List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)
On the subject of large VRML files, is there a list which shows which of the popular VRML viewers support gzipped VRML files? If most of them do, then there's no danger in using the gzipped files. But if Cosmoplayer is the only one that supports gzipped files, we'll have to make do with the full (large) files in order to allow everyone to see the files.
It's part of the VRML2 specification, so any VRML2 viewer must be able to read gzipped worlds. For other purposes I've been trying out a range of viewers and they all worked fine with gzipped files. They were: Microsoft's version of WorldView WorldView Blaxuun Contact Cosmo Cordona Because VRML2 is plain text, the compression in going to gzipped is huge, so it should be a matter of habit for anything other than the smallest of worlds. A VRML2 checker/optimizer such as Chisel is a handy device for making sure you've got the minimum junk within the file, then for gzipping it to make sure the file is the smallest possible. Steve Professor Steven Abbott steven@abbott.demon.co.uk http://www.autotype.com chemweb: A list for Chemical Applications of the Internet. To post to list: mailto:chemweb@ic.ac.uk Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To (un)subscribe, mailto:majordomo@ic.ac.uk the following message; (un)subscribe chemweb List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)
Steven Abbott wrote:
On the subject of large VRML files, is there a list which shows which of the popular VRML viewers support gzipped VRML files? If most of them do, then there's no danger in using the gzipped files.
The 2 big players: Cosmo and WorldView work fine with gzip files. Virtually <g> all 125,000 molecular models on WebMolecules are supplied that way for VRML viewers. See http://www.webmolecules.com
Because VRML2 is plain text, the compression in going to gzipped is huge, so it should be a matter of habit for anything other than the smallest of worlds.
The compression ratios are significant, but the sluggishness of VRML players on Win/Mac platforms remains. Even with modern P3 and Athlon processors, the performance for mega-component worlds is awful. By comparison, Chime is amazingly fast. We do think VRML shines for small 3D models and simple animations. Sincerely, -- Phil Stevens Molecular Arts Chemistry and Safety Software for the Classroom, Lab, and Field ---------------------------------------------------------------- Molecular Arts Corporation | <phils@molecules.com> Hanover Corporate Centre, Suite 1000 | http://www.molecules.com 1532 East Katella Avenue | Main: (714) 634-8100 Anaheim, California 92805-6627 USA | FAX: (714) 634-1999 ---------------------------------------------------------------- chemweb: A list for Chemical Applications of the Internet. To post to list: mailto:chemweb@ic.ac.uk Archived as: http://www.lists.ic.ac.uk/hypermail/chemweb/ To (un)subscribe, mailto:majordomo@ic.ac.uk the following message; (un)subscribe chemweb List coordinator, Henry Rzepa (mailto:rzepa@ic.ac.uk)
participants (3)
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                Paul May
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                Phil Stevens
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                Steven Abbott