[Plib-devel] loading textures and ssgTexturePath(path)

[Olivier A <oli...@wa...>]

   Neither ssgSimpleState::setTexture(file) nor ssgLoadTexture(file) use 
the path set by ssgTexturePath(path) to load texture files. As the path 
is not addded, these functions load 'file' from the current working 
directory, which is not the same among the OS, or the windowing system 
used (GLUT, pw, ...).
   I think it is a bug (but I am not sure): In some examples, e.g. 
ssg/water, the program set the path to "data" with a call to 
ssgTexturePath and loads textures by simply calling 
ssgSimpleState::setTexture("pattern.rgb"), ... but the the SGI texture 
loader does not look for the file in the "data" folder.
   I suggest the following patch in ssgLoadTexture.cxx:

in the function: bool ssgLoadTexture ( const char * filename, 
ssgTextureInfo* info )
just after the "if ( *extn != '.' )" block:

+++   char buff[1024];
+++   _ssgCurrentOptions->makeTexturePath(buff, filename);
+++   const char *filepath = buff;

and replacing 'filename' by 'filepath' thereafter (3 occurences).

   The problem is that I am not sure this patch is compatible with model 
loaders, which use a ssgLoaderOptions class... (A quick search shows 
that it is only redondant).

   Another way is to modify the following method of ssgSimpleState in 
ssg.h:

virtual void  setTexture ( const char *fname,
     int _wrapu = TRUE, int _wrapv = TRUE, int _mipmap = TRUE )

by applying the same patch as above, and perhaps moving the code in 
ssg.cxx.

Olivier A.