Evaluators are the principal method of handling conditional checks in our decision structures. While actions perform the eventual behaviors that our agents exhibit, it's the responsibly of evaluators to determine which action is allowed to run at what time.
Creating an evaluator object simply wraps a function call that returns true or false when the userData table is passed into the function:
Evaluator.lua:
function Evaluator.Evaluate(self)
return self.function_(self.userData_);
end
function Evaluator.new(name, evalFunction, userData)
local evaluator = {};
-- data members
evaluator.function_ = evalFunction;
evaluator.name_ = name or "";
evaluator.type_ = Evaluator.Type;
evaluator.userData_ = userData;
-- object functions
evaluator.evaluate_ = Evaluate;
return evaluator;
end