diff --git a/mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua b/mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua index 11954e28a..08d6916f5 100644 --- a/mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua +++ b/mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua @@ -1,16 +1,42 @@ local math_random = math.random local vector_multiply = vector.multiply +local vector_add = vector.add local minetest_yaw_to_dir = minetest.yaw_to_dir local minetest_get_item_group = minetest.get_item_group local minetest_get_node = minetest.get_node +local minetest_line_of_sight = minetest.line_of_sight local state_list_wandering = {"stand", "walk"} +local DOUBLE_PI = math.pi * 2 +local EIGHTH_PI = DOUBLE_PI * 0.125 +--this is basically reverse jump_check +local cliff_check = function(self,dtime) + local pos = self.object:get_pos() + pos.y = pos.y + 0.1 + local dir = minetest_yaw_to_dir(self.yaw) + local collisionbox = self.object:get_properties().collisionbox + local radius = collisionbox[4] + 0.5 + + local free_fall, blocker = minetest_line_of_sight( + {x = pos.x + dir.x, y = pos.y, z = pos.z + dir.z}, + {x = pos.x + dir.x, y = pos.y - self.fear_height, z = pos.z + dir.z}) + + return free_fall +end + +--a simple helper function which is too small to move into movement.lua +local quick_rotate_45 = function(self,dtime) + self.yaw = self.yaw + EIGHTH_PI + if self.yaw > DOUBLE_PI then + self.yaw = self.yaw - DOUBLE_PI + end +end --check if a mob needs to jump local jump_check = function(self,dtime) @@ -84,6 +110,17 @@ local state_execution = function(self,dtime) --check for nodes to jump over jump_check(self) + --turn if on the edge of cliff + --(this is written like this because unlike + --jump_check which simply tells the mob to jump + --this requires a mob to turn, removing the + --ease of a full implementation for it in a single + --function) + if cliff_check(self,dtime) then + --turn 45 degrees if so + quick_rotate_45(self,dtime) + end + --print("walk") elseif self.state == "run" then