On Thursday, Jun 10, 2004, at 03:43 America/New_York, Fabian Braennstroem wrote:
This will determine the type of object. I suspect you are getting a Group of 2
Fields, which is a general purpose object and not a suitable input to some
modules that can't deal with arbitrary polymorphs like Group. So first try
Select(0) on the output of Import, prior to Streamline.
Sorry, but I don't understand this :-(
Generally, when we give 'help' (if you can call it that), we (or at least I) capitalize the names of DX modules.
So "Select(0)" means insert a Select module into your data flow (in this case, after Import), and set its only
parameter to "0" (the default). This will Select out member 0 from the input if that input is a Group. "Group"
is not a DX module but a DX Object type. I capitalized it because it's a formal name.
However, now that you've changed to U-V 2-vector, you won't have a Group any more so Select will probably
whine. (so don't do it unless you want to see what happens).
Yes, esp. if you are still defining a grid in your input file. Though you could have only 'line' connections and Streamline needs 'quads' (or maybe 'triangles') in the 2D case and 'cubes' or 'tetrahedra' in the 3D case, since it has to interpolate through the spatial domain, and the connections define how the positions carrying the data are joined over the continuous spatial domain. This is the sort of thing you can find with Print("rd") attached to the output of your Import (or other) module. You see what DX sees as a result of how you specified your input file and how Import has interpreted that specification.But I still think you want to join U and V to make [U,V].
I did this; I changed U and V to a 2-Vector-float. Now, I have a nice
'AutoGlyph'-Output, but still 'Streamline' has problems:
Streamline: Missing data: connections
Isn't that strange!?
Greetings!
Fabian
Or you can use Describe which is easier to understand for DX beginners because it gives less detailed info than Print.
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Chris Pelkie
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