Noel
Your mobility loss is certainly benefiting OpenBabel a lot :-)
On 03/03/2012 15:56, Noel O'Boyle wrote:
>
> Just FYI, I've been playing around with the SVG output to see whether
> I could improve "draggability" for the 1000 molecule SVG discussed at
> [1]. I didn't edit the OB code; I just wrote a Python script to
> transform the SVG (see [2]).
>
> (A) There was a suggestion in the comments at [1] that:
> "Would be better (performance-wise) if you didn't stroke the text,
> that tends to be expensive compared to simply filling the text. If you
> want bold text just use 'font-weight' to do that instead. "
>
> I tried this out, and there was only a small difference in memory
> usage and file size, and it didn't seem to make any difference to
> performance when dragging 1000 molecules around.
>
> (B) I noticed some repetition in stroke specs for the lines, so I
> grouped them together with<g stroke="rgb(0,0,0)" stroke-width="2.0">
> (naturally this only works because they are all black by default).
> This led to a 1/3 decrease in file size and memory. However it still
> didn't seem to make any difference to performance when dragging 1000
> molecules around.
>
> So...in short, it doesn't seem to be worth it to edit the OB code.
There must be browser plugins or Javascript tricks to improve the user
feel while the whole screen is being reinterpreted and redrawn. For
instance, draw the molecule under the cursor first to give the user
something interesting to look at.
> For fun, I played around with CSS. If you install Firebug in Firefox,
> you can edit the CSS properties on the fly. For example, you can enter
> stuff like
> line {
> stroke-width: 5;
> }
>
> and immediately the SVG has wider lines. I'm not sure if this is very
> useful though.
Something I have thought about is to use the CSS visibility to change
features interactively, e.g. circles in benzene rings or kekule double
bonds. If it was worth it you can do a lot with a little bit of Javascript.
> - Noel
>
> [1]
> http://baoilleach.blogspot.com/2011/06/molecular-zooming-with-open-babel-svg.html
> [2] https://gist.github.com/1966793
>
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------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
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