
root(+Handle)

   Create the root node of a search tree

Arguments
   Handle              an opaque data structure for the visualization

Type
   library(visualize_tree)

Description
This predicate creates the root node of a search tree in a visualization, this should be called before any choices are made. It automatically calls draw_visualization/1 to collect the information about the state of variables and constraints.

Examples
   top(N,L):-
    length(L,N),
    L :: 1..N,
    alldifferent(L),
    create_visualization([],Handle),
    add_visualizer(Handle,vector(L),[]),
    number_variables(Handle,L,Terms),
    root(Handle),
    search(Terms,1,first_fail,
           tree_indomain(Handle,_),complete,[]),
    solution(Handle),
    close_visualization(Handle).


See Also
   solution / 1, try / 4, failure / 4, tree_indomain / 3, visualization : draw_visualization / 1
