[vtkusers] Two parallel coords chart questions

[Eric E. Monson]

Hey again,

I just noticed that vtkAxis has a SetBehavior() method, so I've been trying to set it to 2 so that auto-scaling won't happen. When the chart first shows up on the screen I can tell it's using my min/max I've set (along with the "nice" bounds you're calling with axis->AutoScale()), but almost immediately all the axes rescale themselves to the bounds of each individual table column. I can't find where in the chart code the axis Behavior=2 is getting overridden...

If you have any ideas I'd appreciate it.

(Also, it might be a nice feature to have a "set all axes to the same (auto) range" feature, and maybe an option to not call axis->AutoScale() if people want to set their own custom tick positions.)

Thanks,
-Eric


On Apr 22, 2010, at 4:47 PM, Eric E. Monson wrote:

> Hey Marcus,
> 
> I figured out how to use vtkConvertSelection, so #1 isn't as urgent (although if there's something built in to the chart it would be good to know about).
> 
> #2 is still an issue, when you get a chance.
> 
> Thanks,
> -Eric
> 
> 
> On Apr 22, 2010, at 3:21 PM, Eric E. Monson wrote:
> 
>> Hey Marcus,
>> 
>> I'm back to trying to incorporate the parallel coordinates chart into my vis project and I have a couple of quick questions:
>> 
>> 1. If the table I'm using for plotting has PedigreeIds, is there any way to get the selection to return this instead of indices? I tried creating my own annotation link with the correct ContentType and setting that as the chart's annotation link, but it still comes back as Indices... (I'm still not great with the selection stuff -- maybe there's an easy way to convert the type by using the SelectionNode itself, or maybe I need to use vtkConvertSelection?)
>> 
>> 2. Is there a way to manually set the axis ranges? In this case I want to be able to compare the scales of the variables across all axes, so I'd like all the axes to have the same range. I tried chart.GetAxis(i).SetMaximum() and Minimum, but it looks like your auto-scale axes kung-fu is too strong for my "poke at it with a stick" technique... :)  Is there any way around this right now?
>> 
>> Thanks a lot,
>> -Eric
>> 
>> ------------------------------------------------------
>> Eric E Monson
>> Duke Visualization Technology Group
>> 
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