[Cartoweb-users] What is num_nodes in boost_wrapper.cpp

[Fay Du]

Hi everyone:
 
    When I read through pgDijkstra code, in boost_wrapper.capp, I found
following 2 lines:
 
    // FIXME: compute this value
    const unsigned int num_nodes = ((directed && has_reverse_cost ? 2 :
1) * count) + 100;
 
    I want to know what is num_nodes is for? And what does it affect if
it is smaller than program needs?  Will it cause bug?
 
Thanks in advance,
Fay
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