Animation with add_vertex() causes regenerate_surface() to hang #6
Description
I am attempting to create an animation like the animations in the animation section of the documents, but using add_vertex() (which none of the examples use).
When I add a single vertex to my random_graph as a starting point, regenerate_surface() in the update_state() function then hangs.
I have gone into regenerate_surface() and then from there, into cairo_draw(), and then from there found that the hang happens in line 702 of cairo_draw.py:
generator = libgraph_tool_draw.cairo_draw(g._Graph__graph,
_prop("v", g, pos),
_prop("v", g, vorder),
_prop("e", g, eorder),
nodesfirst, vattrs, eattrs, vdefs, edefs, res,
max_render_time, cr)
The first call to regenerate_surface() - on the newly created random_graph() - works fine. calling random_graph() after adding a single vertex hangs. Inspecting the arguments passed to libgraph_tool_draw.cairo_draw() prior to the call shows that the parameters are not changing.
I would dearly like to get this working for an educational video I am trying to put together, but may have to try another library if I cannot get this working. Any help will be greatly appreciated.