[GPlates-discuss] Adjust time step used to calculate displayed velocity fields?

[Christian.Heine at shell.com]

Hi Jonny,

this was a clear case of replying too fast - I only realised later and after testing with the GPlates sample data that the animation increments do not change the velocity interpolation delta time as you rightly described in your email. Sorry about that. So this only leaves John's suggestion to use pygplates.

Cheers,
Christian

> -----Original Message-----
> From: gplates-discuss-bounces at mailman.sydney.edu.au [mailto:gplates-
> discuss-bounces at mailman.sydney.edu.au] On Behalf Of jonny wu
> Sent: Friday, 18 March 2016 5:13 AM
> To: Christian Heine; GPlates general discussion mailing list
> Subject: Re: [GPlates-discuss] Adjust time step used to calculate
> displayed velocity fields?
> 
> Hi Christian,
> 
> 
> thanks for the suggestion and your generous help.
> 
> 
> I followed your suggestion and tested smaller increments including 0.01.
> The animation is of course displayed in finer timesteps, but my abrupt
> plate motion change shown by the velocity field vectors is still
> interpolated over 1 Ma.
> 
> I will personally send you some example animations in a following email.
> 
> cheers
> Jonny
> 
> ==
> Jonny Wu
> Post-doctoral Research Fellow
> Department of Geosciences
> National Taiwan University, Taipei
> http://suppelab.gl.ntu.edu.tw/jonny
> 
> 
> On Thursday, 17 March 2016, 19:30, Christian Heine
> <chhei at mensa.uberspace.de> wrote:
> 
> 
> 
> Hi Jonny,
> 
> adjusting the time increment for your animation can be done through
> Reconstruciton -> Configure animation. Here you can then set the
> increment to 0.01 (or maybe even shorter) time increments.
> 
> Greetings,
> Christian
> 
> 
> 
> On 17 Mar 2016, at 11:24 am, jonny wu <jonnywu_rhul at yahoo.co.uk> wrote:
> 
> > Hi all
> >
> > I'd like to adjust the velocity time step that is used to calculate the
> displayed velocity fields in Gplates.  Does anyone know if this is
> possible?  It seems the velocity time step is set at 1 Ma, but I like to
> choose a shorter time increment.
> >
> > For example, I have modelled an abrupt plate motion change at 2 Ma.  If
> the plate velocity fields are shown at coarse 1 Ma increments, my abrupt
> plate motion change can appear in Gplates between the single 2 Ma to 1 Ma
> timestep without any problems.  However, if I view the plate model at
> finer 0.2 Ma increments, the abrupt plate motion change is smoothly
> interpolated between the 2 to 1 Ma timesteps.  I would like to see an
> abrupt change between 2.0 and 1.8 Ma, and constant plate motion
> directions after 1.8 Ma.
> >
> > Does anyone have experience with this?
> >
> > thanks in advance
> > Jonny Wu
> >
> > ==
> > Jonny Wu
> > Post-doctoral Research Fellow
> > Department of Geosciences
> > National Taiwan University, Taipei
> > http://suppelab.gl.ntu.edu.tw/jonny
> 
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