Most ToME NPCs now use distance map to pursue the player

game/engine/ai/simple.lua

game/modules/tome/class/Actor.lua

game/modules/tome/data/general/npcs/ant.lua

game/modules/tome/data/general/npcs/aquatic_critter.lua

game/modules/tome/data/general/npcs/aquatic_demon.lua

game/modules/tome/data/general/npcs/bear.lua

game/modules/tome/data/general/npcs/bone-giant.lua

game/modules/tome/data/general/npcs/canine.lua

game/modules/tome/data/general/npcs/cold-drake.lua

game/modules/tome/data/general/npcs/faeros.lua

game/modules/tome/data/general/npcs/fire-drake.lua

game/modules/tome/data/general/npcs/major-demon.lua

game/modules/tome/data/general/npcs/minor-demon.lua

game/modules/tome/data/general/npcs/minotaur.lua

game/modules/tome/data/general/npcs/multihued-drake.lua

game/modules/tome/data/general/npcs/mummy.lua

game/modules/tome/data/general/npcs/naga.lua

game/modules/tome/data/general/npcs/ooze.lua

game/modules/tome/data/general/npcs/orc-gorbat.lua

game/modules/tome/data/general/npcs/orc-grushnak.lua