Proposals/Pathfinder wishlist

This is a list of wishes for pathfinder.

Basics

• Height clearance: Require optional height clearance for tall objects (e.g. can only proceed if 2 nodes height are clear)
• Custom nodes: Select which nodes to consider free/blocking/walkable

Movement options

These should be toggable on/off.

• Fly
• Swim in liquids
• Climb in climbable nodes
• Move diagonally

Movement contraints

Add a couple of options to add rules to constrain movement. These should be toggable on/off.

• Avoid nodes with damage_per_second > 0
• Avoid nodes with drowning > 0
• Avoid liquids
• Avoid non-liquids
• Don't jump on or in disable_jump nodes

Other

• Support nodeboxes (but how?)
• Time out when search takes too long (with parameter?)

Issues

https://github.com/minetest/minetest/issues/5479