AbstractTask

This page describes available transformations of the root task.

Cost-adapted task

A cost-adapting transformation of the root task. Related paper:

• Silvia Richter and Matthias Westphal.
  The LAMA Planner: Guiding Cost-Based Anytime Planning with Landmarks.
  Journal of Artificial Intelligence Research 39:127-177. 2010.

adapt_costs(cost_type=normal)

• cost_type ({normal, one, plusone}): Operator cost adjustment type. No matter what this setting is, axioms will always be considered as actions of cost 0 by the heuristics that treat axioms as actions.
  • normal: all actions are accounted for with their real cost
  • one: all actions are accounted for as unit cost
  • plusone: all actions are accounted for as their real cost + 1 (except if all actions have original cost 1, in which case cost 1 is used). This is the behaviour known for the heuristics of the LAMA planner. This is intended to be used by the heuristics, not search algorithms, but is supported for both.

Root task

No transformation of the input task.

no_transform()