[igraph] Questions about random generator graph

[alex]

Hi,
i have some questions about generating random graph:
   1- In case when i generate a random graph, can i get the coordinates 
of differents vertex _i.e_ for example like in grg game, i can specify 2 
vector where i can get the 2-D coordinates of each vertex.

   2- When i generate a random graph, can i rewire the graph to obtain 
a specific degree. I have seen that the function igraph_rewire does the 
same  thing but  it keeps the already  degree and i want to change it.

Thx for help