private int getVertexCount()
  {
      int vertexCount = coordinates.length;

      if (colors3 != null) {
	  if (colors3.length > vertexCount) vertexCount = colors3.length;
      } else if (colors4 != null) {
	  if (colors4.length > vertexCount) vertexCount = colors4.length;
      }

      if (normals != null) {
	  if (normals.length > vertexCount) vertexCount = normals.length;
      }

      // Find max length tex coord set
      for (int i = 0 ; i < texCoordSetCount ; i++) {
	  if (texCoordSets[i].length > vertexCount)
	      vertexCount = texCoordSets[i].length;
      }

      return vertexCount;
  } // End of getVertexCount