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ztangent avatar ztangent commented on July 16, 2024

It's undocumented, but you use this function to get an iterator over all possible arguments for a predicate / fluent!

PDDL.jl/src/grounding/utils.jl

Lines 3 to 13 in 8864418

"Returns an iterator over all ground arguments of a `fluent`."
function groundargs(domain::Domain, state::State, fluent::Symbol)
if get_requirements(domain)[:typing]
argtypes = get_fluent(domain, fluent).argtypes
obj_iters = (get_objects(domain, state, ty) for ty in argtypes)
else
n = arity(get_fluent(domain, fluent))
obj_iters = (get_objects(state) for i in 1:n)
end
return Iterators.product(obj_iters...)
end

This doesn't do any relevance checking though. If you want the list of all "planning-relevant-ground-predicates", you can construct a GraphPlan-style planning graph using this function, and then access the conditions field.:

https://github.com/JuliaPlanners/SymbolicPlanners.jl/blob/c2c83e06e826dae3fae53a7e257d0df158a8d0c0/src/heuristics/pgraph.jl#L17-L27

from pddl.jl.

ztangent avatar ztangent commented on July 16, 2024

Hopefully this resolved your issue! Moving this to the Q&A section of the Discussions page.

from pddl.jl.

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