[vtkusers] question about mapping textures to arbitrary shapes

[John Biddiscombe]

Look at vtkTextureMapToPlane. If I read you right, you've got a 2D image
that you want to stick on a pie shaped 2d polygon. Just project the image
onto the polygon.

Probably its not as simple as that...

JB

----- Original Message -----
From: "Wilson" <wilson at cs.wisc.edu>
To: <vtkusers at public.kitware.com>
Sent: Tuesday, November 12, 2002 9:54 PM
Subject: [vtkusers] question about mapping textures to arbitrary shapes


hi,
    I am new to using VTK and I have a quesiton about how to map textures to
arbitrary shapes.  In my particular case, I am trying to visualize
ultrasound data.  In this case, the data does not posess a rectilinear
distribution, but rather it looks more like a pie wedge.
    So, if my texture consists of a 2D array, how would I map it to a wedge
shape given I know where each texture/data point should map to in physical
2-D space?  I have taken a look at the vtkDataSetMapper, and I believe that
this is the right way to procede, but the details allude me.  Could anyone
offer any insight on this matter?

Wilson Chang
MD/PhD Program
University of Pittsburgh
School of Medicine
Dept of Bioengineering