[JAVA3D] picking triangles from loader (obj) geometry

[ed scholl]

hello,

i've been going through the archives and i've almost got it i think...
just need a little bit more help-
i've loaded up a scene with the obj loader, and i can grab it's shape
and geometry; I can also generate a pick ray, and get the triangle
array from the geometry.  i can retrieve the number of vertices from
the triangle array with getVertexCount; however, when i try to
getCoordinate, i get a java.lang.NullPointerException
I'm using :

 int firstvert = 0
 for(int i = 0; i < triCount; i++)
 {
 tArray0.getCoordinate(firstvert, tri[0]);
    tArray0.getCoordinate(firstvert + 1, tri[1]);
 tArray0.getCoordinate(firstvert + 2, tri[2]);
 firstvert += 2;
  boolean hit = Intersect.rayAndTriangle(pickry, tri, 0, dist);
 if(hit)
 {
   System.out.println("got triangle " + i);
 }
  }

I'm going under the assumption that since I have vertices (from getVertexCount),
that I have coordinates...  Is that not necessarily correct?

Thanks for any input.

-Ed

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