[Openev-discuss] Creating a shape file in C

[<aud...@at...>]

Hi,
I am Aude Espesset from Atlantis. I am trying to create shapes in a C
program and  output them to a shape file. The shape file is created, I
obtain  the .shp, .dbf and .shx files with non-null size, but when I
open the shapefile with OpenEv, it's empty. Can anyone tell me what's
wrong with my program:


  GvData *gdata;
  GvShape *one_shape;
  GvShapes *all_shapes;


 gtk_init(&argc, &argv);


 gdata = gv_shapes_new();
  all_shapes = GV_SHAPES(gdata);

  /*create one shape with only one ring*/
  one_shape = gv_shape_new( GVSHAPE_AREA );
  gv_shape_set_xyz( one_shape, 0, 0, 1.0,1.0,0.0);
  gv_shape_set_xyz( one_shape, 0, 1, 1.0,10.0,0.0);
  gv_shape_set_xyz( one_shape, 0, 2, 10.0,10.0,0.0);
  gv_shape_set_xyz( one_shape, 0, 3, 10.0,1.0,0.0);
  gv_shape_set_xyz( one_shape, 0, 4, 1.0,1.0,0.0);

  gv_shapes_add_shape(all_shapes, one_shape);

  printf("number of shapes = %d\n",gv_shapes_num_shapes(all_shapes));
====> this prints 1
  printf("number of nodes =
%d\n",gv_shape_get_nodes(one_shape,0));        ====> this prints 5

  gv_shapes_to_shapefile(commands->dest_shape, GV_DATA(all_shapes),
SHPT_NULL); /*I also tried with SHPT_POLYGON*/