Texture mapping using SoTexture2

[Amrita Chanda <achanda@xxxxxxxxxxx>]

Hi all,
I am trying to map a texture onto a triangulated mesh (actually a
digital elevation model, DEM) lying parallel to the Y-Z plane. 
I was wondering if the s and t parameters of a texture being mapped are
computed in this way: s is automatically taken to be the longer side of
triangulated mesh and t is the shorter side?

If this is what happens, how do I prevent it?

Any help will be appreciated.

Thanks,
amrita.