Re: [Jmol-users] Jmol Android suggestions?

[Robert H. <ha...@st...>]

On Tue, Oct 25, 2011 at 8:02 AM, Rzepa, Henry S <h....@im...>wrote:

> >> (By the way, Wow! Do I LOVE this little dual-core Galaxy. I am very
> happy I
> >> didn't jump for an iPad now; this is a real computer, not just a large
> >> iPhone!)
> >>
> >> I'm starting to catch on to the tablet idea,
>
>
> Bob,
>
> If you have any spare time (!),  I would be interested in how much having
> the  Jmol app running on the  Galaxy reduces its battery duration 9 (from eg
> 8 hours to what?).  With the current state of battery technology, most of
> what a tablet does is probably dominated by this attribute.   Thus  graphics
> is always going to be expensive, but how much?
>
>
A lot of this depends upon how an app is set up. Right now we are not
shutting down when given the "pause" or "stop" event, and that would of
course be important. The TODO list includes making sure rendering is shut
down when sleeping, but that's not there yet. So we could address this once
we get it tuned a bit more.




> I note in this context that the  "battery sensitive" version of  OpenGL
> (WebGL) has yet to make an appearance on a tablet (I had been anticipating
> it might in  iOS 5 but it did not).  I presume they are still working on
> making it battery friendly.  No idea if the Samsung browser on the tablet
> supports  WebGL yet (although in fact  WebGL is not directly relevant to
>  Jmol!).
>

I suspect that WebGL is extremely processor intensive just because there
must be a lot of overhead.

The Samsung Galaxy will also give me another platform to experiment with
parallel processing, since it is dual core, and both processors are
available. Memory could be an issue, but it might be quite interesting to,
for example, have the translucent rendering running in parallel to the
opaque rendering, and then just integrated at the end. Right now it's two
separate passes. Or we could have a processor just for balls or just for
cartoons, or something like that.


>
>
>
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-- 
Robert M. Hanson
Professor of Chemistry
St. Olaf College
1520 St. Olaf Ave.
Northfield, MN 55057
http://www.stolaf.edu/people/hansonr
phone: 507-786-3107


If nature does not answer first what we want,
it is better to take what answer we get.

-- Josiah Willard Gibbs, Lecture XXX, Monday, February 5, 1900