[vtkusers] what kind input data does vtkstreamline need?

[Zhao Yongqiang]

Will,

Thank you for your reply. I check the mailing list and the document of 
VTK, but i can not find how to associate the isosurface data with the 
vector field. So, my question is :
How to build vector field to represent blood flow and how to associate?  
Can I build the field from the isosurface data? and can I use the 
isosurface data as source object of vtkStreamline?

Zhao Yongqiang
2005.5.17

Will Schroeder wrote:

> Zhao-
>
> Streamlines need a vector field (which in your case should be a 
> representation of blood flow). That is, the volume that you 
> isocontoured should have vectors associated with it, and should be the 
> input to the streamline filter. Then of course you'll want to specify 
> a starting point or points for the streamline.
>
> Will
>
> At 11:05 AM 5/16/2005, Zhao Yongqiang wrote:
>
>> Hi all,
>>       After i get the segmented data, i use marching cube to 
>> visualize the blood vessel. Then,  I want to use vtkstreamline to 
>> simulate blood flow. But when i use the output of the marching cube 
>> as the input of vtkstreamline , it said that "No vector data defined!".
>>      Can someone tell me the reason? and how to solve it?
>>      Thanks in advance!
>>
>>
>> Zhao Yongqiang
>> 2005.5.16
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