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MathGroup Archive 2005

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Re: Re: Visualization site updates

  • To: mathgroup at smc.vnet.net
  • Subject: [mg61002] Re: [mg60979] Re: Visualization site updates
  • From: Chris Chiasson <chris.chiasson at gmail.com>
  • Date: Fri, 7 Oct 2005 03:37:46 -0400 (EDT)
  • References: <dht4fq$hng$1@smc.vnet.net> <200510060808.EAA08497@smc.vnet.net>
  • Reply-to: Chris Chiasson <chris.chiasson at gmail.com>
  • Sender: owner-wri-mathgroup at wolfram.com

What I want to know is:
(When) Are we going to get OpenGL rendering and/or SVG with embedded
fonts and embedded MathML export?
:]

On 10/6/05, Martin Kraus <martin_kraus_germany at yahoo.com> wrote:
> Jeff,
>
> I definitely agree that the resolution of most of the excellent
> visualizations on your site is too fine for LiveGraphics3D,
> i.e., there are too many primitives for interactive rendering
> with LiveGraphics3D. Rendering at a lower resolution is
> therefore often unavoidable, and I'm usually much more
> aggressive in this respect when adapting
> Mathematica graphics for LiveGraphics3D in order to ensure
> interactive rendering also on less powerful machines.
> Without the possibility to render graphics interactively, it is usually
> preferable to offer a static picture for a well chosen view point
> and/or a precomputed animation for a rotating object (as you
> did for the earthquake example).
>
> The 3d surface offers an example for which the interactive version
> doesn't offer a lot of benefits: there are too many polygons for
> interactive rendering with LiveGraphics3D and the geometry of the
> surface (a height field) appears to be simple enough to be understood
> with a 2d image (apart from some hidden parts).
>
> I think the ability to interactively rotate and zoom objects is
> particularly useful to examine the earthquake and molecule
> examples because the 3d point positions cannot be understood
> from a 2d image.  In these cases the stereo viewing (press "s" to
> toggle the applet between single view, stereo view for
> divergent fusing and stereo view for cross fusing) is also useful.
>
> In order to separate points of the same color (in particular for
> molecules) you could try the applet parameter
> <PARAM NAME="POINT_EDGE_COLOR" VALUE=#000000>
> to render each point with a thin black edge.
>
> Without further coarsening, any of the animations would not render
> interactively with LiveGraphics3D. However, using LiveGraphics3D
> to view animations offers the benefit of more control over choosing
> the time step (ALT/META/COMMAND + left button  or right button
> and dragging horizontally).
>
> BTW a great site for visualization with Mathematica!
>
>
> Martin Kraus
>
>
> Jeff Bryant ha escrito:
>
> > I've begun adding some new functionality to my visualization site.  A
> > few people have requested the ability to be able to interact with the 3D
> > graphics in real-time.  I decided to try using LiveGraphics3D by Martin
> > Krauss on several of my examples.  Some of the examples are not
> > appropriate for real-time interaction as the render time was too long.
> > I picked a few of my 3D visualizations that were more reasonable.  For
> > those examples that are interactive, they are often rendered at lower
> > resolutions to keep loading time down.  I'd would be interested in
> > hearing your thoughts on whether this is useful where appropriate.  Here
> > are the examples I currently have:
> >
> > http://members.wri.com/jeffb/visualization/3dsurf-interact.shtml
> > http://members.wri.com/jeffb/visualization/potentials-interact.shtml
> > http://members.wri.com/jeffb/visualization/galaxies-interact.shtml
> > http://members.wri.com/jeffb/visualization/quake3d-interact.shtml
> > http://members.wri.com/jeffb/visualization/algebraic-interact.shtml
> > http://members.wri.com/jeffb/visualization/prehistoric-interact.shtml
> >
> > I have also added a new visualization (non-interactive) that uses
> > Mathematica to visualize molecular structures in the protein data bank
> > format.  This particular animation shows an insulin molecule with 14,940
> > atoms in it.  To keep the render time down, I used 3D points instead of
> > spheres which unfortunately means no lighting effects:
> > http://members.wri.com/jeffb/visualization/molecule.shtml
> >
> > -Jeff
>
>


--
Chris Chiasson
http://chrischiasson.com/contact/chris_chiasson


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