grid.c

   glhckObject *ground2 = glhckObjectNew();
   unsigned int rows = 16, cols = 16, i, i2, vi, ii;
   glhckImportVertexData v[rows*cols];
   glhckImportIndexData  id[rows*cols*2];
   memset(id, 0, rows*cols*2*sizeof(glhckImportIndexData));
   memset(v, 0, rows*cols*sizeof(glhckImportVertexData));
   for (vi = 0, ii = 0, i = 0; i != rows; i++) {
      id[ii++] = i*cols;
      for (i2 = 0; i2 != cols; ++i2) {
         id[ii++] = i*cols+i2;
         id[ii++] = (i+1)*cols+i2;
         v[vi].vertex.x   = i  * 8.0f;
         v[vi].vertex.y   = rand() % 5;
         v[vi++].vertex.z = i2 * 8.0f;
      }
      id[ii++] = (i+1)*cols+(cols-1);
   }
   glhckObjectInsertIndices(ground2, GLHCK_INDEX_NONE, &id[0], rows*cols*2);
   glhckObjectInsertVertices(ground2, GLHCK_VERTEX_NONE, &v[0], rows*cols);