[Paraview] GIS with ParaView - how to drape?

[Berk Geveci]

If I understand it correctly, you want to perform two distinct
operations:
1. modify the z coordinate of each point of a regular grid with an
elevation (this is what a carpet plot is and as explained in previous
messages, it is easy to do this in ParaView using "warp")
2. apply an image as a texture on a 2D surface (texture mapping).
Although the underlying engine (VTK) supports this, ParaView does not
yet support texture maps. Two reasons: 1. there has not been enough
demand to make this a priority, 2. since ParaView is designed to run in
parallel (and perform parallel rendering), there are some technical
issues we haven't addressed.
Depending on your requirements, you can use ParaView together with VTK
(VTK supports C++, python, tcl and java development) or you can dig in
ParaView code (with some help from developers) and try to enable texture
mapping.

-Berk

On Sun, 2004-03-07 at 13:05, John Harrop wrote:
> Our group is fairly new to ParaView/vtk but our initial results and
> impressions have been very favourable.  We work with 3D geophysical
> models that we build by geophysical inversion of (mostly) surface
> surveys.  ParaView has worked very well at enabling us to place drill
> hole traces through volumetric models.  It has also been very good at
> positioning 2D sections in a 3D model.
> 
> One area we have not quite figured out yet is: How do you drape a 2D
> texture/image onto a surface?
> 
> For example, suppose you have a satellite image or air photo of the
> surface of the area you have been modelling.  We usually also have a DEM
> so we can generate an elevation surface as a regular mesh or a TIN.  Can
> anyone make suggestions on where I can learn more about this kinds of
> draping/texture mapping.  (Incidentally, in this case the image is not
> being "corrected" by the terrain - its just being dropped vertically
> onto the surface with no horizontal adjustment of pixel positions.)
> 
> Cheers,
> 
> John Harrop
> 
> 
> 
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-- 
Berk Geveci <berklist at nycap.rr.com>