Missing lines in Wavefront OBJ import

[pa-hobe]

When importing a .obj file, only the first line element of a polyline is imported, the other line elements are ignored.
The line header l denotes a polyline, see https://en.wikipedia.org/wiki/Wavefront_.obj_file#Line_elements.
For example,

l 1 2 3 4

is equivalent to

l 1 2
l 2 3
l 3 4

The lines (2, 3) and (3, 4) of l 1 2 3 4 are ignored.

The parsing code is in wrap/io_trimesh/import_obj.h:

[...]
else if ( header.compare("l")==0 )
{
  loadingStr = "Edge Loading";
  
  if (numTokens < 3)
  {
    result = E_LESS_THAN_3_VERT_IN_FACE; // TODO add proper/handling error code
    continue;
  }
  
  ObjEdge e = { (atoi(tokens[1].c_str()) - 1),
                (atoi(tokens[2].c_str()) - 1) };
  ev.push_back(e);
  
  numEdges++;
}
[...]

I suggest adding a loop to get the other line elements:

[...]
else if ( header.compare("l")==0 )
{
  loadingStr = "Edge Loading";
  
  if (numTokens < 3)
  {
    result = E_LESS_THAN_3_VERT_IN_FACE; // TODO add proper/handling error code
    continue;
  }

  for (int i = 2; i < numTokens; i++)
  {      
    ObjEdge e = { (atoi(tokens[i -1].c_str()) - 1),
                  (atoi(tokens[i].c_str()) - 1) };
    ev.push_back(e);
  
    numEdges++;
  }
}
[...]