[Openvrml-develop] Need help getting started

[Alan L. <li...@ix...>]

Folks,

I'm new to OpenVRML and I need a little assistance to get headed in the 
right direction.  I have a surface model of the abdomen in VRML.  There are 
(approx) 20,000 texture-mapped polygons.  Here's the (abbreviated) VRML file.

#VRML V2.0 utf8
Shape{
    appearance Appearance{
       texture ImageTexture{
          url "abdomen.jpg"
          repeatS FALSE
          repeatT FALSE
       }
    }
    geometry IndexedFaceSet {
       coord Coordinate{
          point[
             -95.375192 39.910000 284.234892,
                 "
                 "
                 "
             22.465226 90.419998 -30.414945
          ]
       }
       normal Normal{
          vector[
             -0.691915 0.222542 -0.686825,
                 "
                 "
             0.805935 -0.569265 0.162499
          ]
       }
       coordIndex[
          0 1 2 -1
                 "
                 "
          33771 33772 33773
       ]
       solid FALSE
       normalPerVertex TRUE
       texCoord TextureCoordinate{
          point[
             0.333287 0.919887,
                 "
                 "
             0.782706 0.692425
          ]
       }
       texCoordIndex[
          0 1 2 -1
                 "
                 "
          33771 33772 33773
       ]
    }
}



I'd like to use this model with a separate collision detection and 
deformation library written in C++.  To do this, I need to be able to 
extract the vertices and the associated polygonal indices.  I'm having some 
trouble doing this.

Here's my code fragment:

VrmlScene     scene;
VrmlNodeType *node_type;
VrmlMFNode   *nodes;
VrmlNode     *node;
char        junk;

scene.load(argv[1]);


// try to find the coordinate node type
node_type = (VrmlNodeType*) scene.scope()
                               ->findType("Coordinate");// works
node = node_type->firstNode();                         // returns null

// try to find the IndexedFaceSet node type
node_type = (VrmlNodeType*) scene.scope()
                               ->findType("IndexedFaceSet");  // works
node = node_type->firstNode();                               // returns null



In short, I can't seem to find the correct function calls to access the 
data. Can somebody tell me what I'm doing wrong?

Thanks much!
Al