[vtkusers] Visualising data on a uniform grid

[burlen]

Hi,
Did you know about vtkUniformGrid class? It is ideal for data specified
on a uniform cartesian grid, and it supports blanking. take a look

http://www.vtk.org/doc/release/5.0/html/a02137.html

As for the vector visualization, maybe you could use a lookup table
creating the color entries based on the vector components? Or would
coloring a scalar field by the vector's magnitude be good enough? I am
sure someone else here will have some better idea in this regard.

-- 
Burlen Loring
Information Technologist III
Space Science Center
Institute for the Study of Earth, Oceans, and Space
University of New Hampshire
39 College Road, Durham, NH 03824
Phone: 603-862-1140



Steven Kenny wrote:
> I have some data that I am reading in that exists on a uniform grid. 
> This is being assigned to type vtkPoints at the moment. It consists of 
> three distinct parts
>
> points - the x, y and z coordinate of the point
> vector - a three component vector associated with each point
> scalar - a scalar value associated with each point
>
> I would like to display the data with the colour at a point in space 
> determined by the three component vector, with its values being used 
> as the RGB components for the colour at that point and with the scalar 
> determining whether a particular point is visible or not. This could 
> either be via a hard cutoff, i.e. if scalar is less than x then point 
> is invisible or by applying a function to the determine an alpha value.
>
> I am unsure what is the best route to achieve this. Does anyone have 
> any suggestions.
>
> Thanks,
>
> Steven Kenny
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