[Paraview] calculator filter via python

[Peter Brady]

I don't think I can do what I originally intended via the calculator
filter due to the need to access the data in center[i][k] which is a
data array in my script but the function parser won't know what to do
with it.  I was able to make some good progress using the programmable
filter and the information on the wiki.

My main question at this point is how do I access the time data from
the programmable filter?  I am using multiblockdatasets.

Thanks,
Peter.

On Fri, Jan 2, 2009 at 11:04 AM, Peter Brady <petertbrady at gmail.com> wrote:
> Hello all,
>
> I am trying to do calculations based on coordinate locations.  In the
> GUI I can simply select 'coordsX', 'coordsY', 'coordsZ'.  From python
> things seem to be more complicated.  I've tried the snippet below with
> several variations and keep getting errors
>
> calc_radius = servermanager.filters.Calculator(Input=g_cont)
> calc_radius.AddCoordinateScalarVariable('coordsX', 0)
> calc_radius.Function =
> 'sqrt((coordsX-center[i][0])^2+(coordsY-center[i][1])^2+(coordsZ-center[i][2])^2)'
> calc_radius.UpdatePipeline()
>
> I've also tried
> calc_radius.AddCoordinateScalarVariable('coordsX')
> but I get the error:
>     calc_radius.AddCoordinateScalarVariable('coordsX')
> TypeError: __call__() takes exactly 1 argument (2 given)
>
> I've also tried using the scalar array name ('G' in this case) in
> place of coordsX but have met the same error message.
>
> What is the correct way of doing this?
>
> Also, I've tried using the PV-Dump.py script that was suggested to me
> previously but am met with the error:
>
> Traceback (most recent call last):
>  File "<console>", line 1, in <module>
>  File "<string>", line 33, in allToPython
>  File "<string>", line 48, in proxiesToPython
>  File "<string>", line 149, in __orderProxies
> AttributeError: 'NoneType' object has no attribute 'groups'
>
> The offending lines are:
> def __orderProxies( proxies ):
>    """Returns an array, where each entry contains the names of the proxies that
>    depend on the previous array entry."""
>    patternName   = re.compile(' *XMLName: *(.*)')
>    patternValues = re.compile(' *Values: *(.*)')
>    patternHex    = re.compile('^0x[0-9a-f]+$')
>    pmanager      = servermanager.ProxyManager()
>
>    dependencies  = {}                                        # COLLECT DEPS
>    for group in proxies:                                     # For each proxy
>      for name in proxies[group]:
>        dependencies[group+':'+name] = {}                     # Init its depend.
>        proxy = proxies[group][name]
>
>        for prop in proxy:
> 148          match     = patternName.search( str(prop) )
> 149          propName  = match.groups()[0]
>
> I was hoping that this script would be very helpful.  Anyone else have
> similar problems?
>
> Thanks in advance for your help,
> Peter.
>