First login?
Lost password?
 
 
cellml-tools-developers AT lists.cellml.org 
A list for the developers of CellML tools

Text archives Help


[cellml-dev] SVG for PCEnv graphs


Chronological Thread 
  • From: r.britten at auckland.ac.nz (Randall Britten)
  • Subject: [cellml-dev] SVG for PCEnv graphs
  • Date: Wed, 28 May 2008 23:21:22 +1200
Hi Andrew

The re-inventing of the wheel that I refer to is the issues with clipping
that caused narrow spikes to be missed (fixed now), and are probably the
cause of the failure to plot constants bug.

I hear what you say regarding performance though, and that is a fair enough
reason.

Regards,
Randall

> -----Original Message-----
> From: cellml-tools-developers-bounces at cellml.org [mailto:cellml-tools-
> developers-bounces at cellml.org] On Behalf Of Andrew Miller
> Sent: Wednesday, 28 May 2008 9:56 a.m.
> To: A list for the developers of CellML tools
> Subject: Re: [cellml-dev] SVG for PCEnv graphs
>
> Randall Britten wrote:
> >
> > Hi
> >
> > Just an idea: perhaps we could change the way we create graphs, such
> > that we create SVG, and then let the Mozilla SVG rendering do the
> rest.
> >
> > That way we don't have to "reinvent the wheel", plus there are
> > benefits, such as the ability to save the graphs.
> >
> > (My guess is that this approach has probably already been considered,
> > so I won't be surprised if the reply is a reference to some previous
> > archive.)
> >
> Hi Randall,
>
> This was discussed at length around February and March 2006 when we
> were
> deciding on this sort of thing originally. See for example
> http://www.cellml.org/meeting_minutes/meeting-minutes-for-
> 2006/23.3.2006/
> (unfortunately, we don't seem to have minutes from the 16th March 2006).
>
> The problem with using SVG is that we need to create an in-memory DOM
> representation of ever single point on the graph - we couldn't get good
> space or time performance from this, and canvas is much more efficient
> for this.
>
> Quite aside from re-inventing the wheel, the canvas API is also a much
> more natural API for writing a graph drawing program - we would
> actually
> be doing more wheel reinventing if we were to use SVG (unless we could
> find an existing library with good enough performance, which is
> unlikely
> given that data points currently don't go through Javascript at all -
> the Javascript just tells the DataCollector, which is C++ code, what
> data to plot and where).
>
> Best regards,
> Andrew
>
> > Regards,
> >
> > Randall
> >
> > ---------------------------------------------------------------------
> ---
> >
> > _______________________________________________
> > cellml-tools-developers mailing list
> > cellml-tools-developers at cellml.org
> > http://www.cellml.org/mailman/listinfo/cellml-tools-developers
> >
>
> _______________________________________________
> cellml-tools-developers mailing list
> cellml-tools-developers at cellml.org
> http://www.cellml.org/mailman/listinfo/cellml-tools-developers



Archive powered by MHonArc 2.6.18.

Top of page