Teach mineturtle how to explode

mods/rp_mobs_mobs/mineturtle.lua

@@ -3,10 +3,25 @@
 -- TODO: Change to rp_mobs_mobs when ready
 local S = minetest.get_translator("mobs")
 
--- Boar constants
+-- Constants
 
 local VIEW_RANGE = 10
 
+-- Time until mine goes boom (seconds)
+local BOOM_TIMER = 3
+
+-- Time until mob blinks on/off (seconds)
+local BLINK_TIMER = 0.2
+
+-- Radius of explosion
+local EXPLODE_RADIUS = 3
+
+-- Max. distance required to activate mine
+local MINE_ACTIVATION_RANGE = 2
+
+-- Min. distance required to deactivate mine
+local MINE_DEACTIVATION_RANGE = 3
+
 local task_queue_roam_settings = {
 	walk_speed = 2,
 	liquid_rise_speed = 2,
@@ -24,9 +39,100 @@ local task_queue_roam_settings = {
 	view_range = VIEW_RANGE,
 	follow_reach_distance = 1,
 	follow_give_up_time = 10.0,
-	no_follow_time = 6.0,
+	no_follow_time = 4.0,
 }
 
+local function find_closest_player_in_range(pos, range)
+	local objs = minetest.get_objects_inside_radius(pos, range)
+	local c_player, c_dist
+	for o=1, #objs do
+		if objs[o]:is_player() then
+			local dist = vector.distance(objs[o]:get_pos(), pos)
+			if (not c_player) or (dist < c_dist) then
+				c_player = objs[o]
+				c_dist = dist
+			end
+		end
+	end
+	return c_player
+end
+
+local function explode(mob)
+	local pos = mob.object:get_pos()
+	mob.object:remove()
+	pos.y = pos.y - 1
+	tnt.boom_notnt(pos, EXPLODE_RADIUS)
+	minetest.log("action", "[rp_mobs_mobs] "..mob.name.." exploded at "..minetest.pos_to_string(pos, 1))
+end
+
+local function microtask_mine()
+	return rp_mobs.create_microtask({
+		label = "Trigger mine",
+		on_start = function(self, mob)
+			mob._temp_custom_state.mine_timer = 0
+			mob._temp_custom_state.mine_notifications = 0
+			mob._temp_custom_state.mine_blink_timer = 0
+			mob._temp_custom_state.mine_blink_state = false
+			mob._temp_custom_state.mine_active = false
+		end,
+		on_step = function(self, mob, dtime)
+			local mobpos = mob.object:get_pos()
+			local range
+			if mob._temp_custom_state.mine_active then
+				local closest = find_closest_player_in_range(mobpos, MINE_DEACTIVATION_RANGE)
+				if not closest then
+					mob._temp_custom_state.mine_active = false
+					mob._temp_custom_state.mine_timer = 0
+					mob._temp_custom_state.mine_blink_timer = 0
+					mob._temp_custom_state.mine_blink_state = false
+					mob._temp_custom_state.mine_notifications = 0
+					mob.object:set_texture_mod("")
+				else
+					mob._temp_custom_state.mine_timer = mob._temp_custom_state.mine_timer + dtime
+					mob._temp_custom_state.mine_blink_timer = mob._temp_custom_state.mine_blink_timer + dtime
+					if mob._temp_custom_state.mine_timer >= BOOM_TIMER then
+						explode(mob)
+						return
+					end
+					if mob._temp_custom_state.mine_blink_timer >= BLINK_TIMER then
+						mob._temp_custom_state.mine_blink_state = not mob._temp_custom_state.mine_blink_state
+						if mob._temp_custom_state.mine_blink_state == true then
+							mob.object:set_texture_mod("^[brighten")
+						else
+							mob.object:set_texture_mod("")
+						end
+						mob._temp_custom_state.mine_blink_timer = 0
+					end
+					if mob._temp_custom_state.mine_notifications < math.floor(mob._temp_custom_state.mine_timer) then
+						rp_mobs.default_mob_sound(mob, "war_cry", false)
+						mob._temp_custom_state.mine_notifications = math.floor(mob._temp_custom_state.mine_timer)
+					end
+				end
+			else
+				local closest = find_closest_player_in_range(mobpos, MINE_ACTIVATION_RANGE)
+				if closest then
+					mob._temp_custom_state.mine_active = true
+					mob._temp_custom_state.mine_timer = 0
+					mob._temp_custom_state.mine_blink_timer = 0
+					mob._temp_custom_state.mine_blink_state = false
+					mob._temp_custom_state.mine_notifications = 0
+					rp_mobs.default_mob_sound(mob, "war_cry", false)
+				end
+			end
+		end,
+		is_finished = function()
+			return false
+		end,
+	})
+end
+
+local function mine_decider(task_queue, mob)
+	local task = rp_mobs.create_task({label="Trigger mine"})
+	local mtask = microtask_mine()
+	rp_mobs.add_microtask_to_task(mob, mtask, task)
+	rp_mobs.add_task_to_task_queue(task_queue, task)
+end
+
 rp_mobs.register_mob("rp_mobs_mobs:mineturtle", {
 	description = S("Mine Turtle"),
 	is_animal = false,
@@ -74,6 +180,7 @@ rp_mobs.register_mob("rp_mobs_mobs:mineturtle", {
 			rp_mobs.init_tasks(self)
 			rp_mobs.add_task_queue(self, rp_mobs_mobs.task_queue_land_animal_roam(task_queue_roam_settings))
 			rp_mobs.add_task_queue(self, rp_mobs_mobs.task_queue_follow_scan(VIEW_RANGE, {}))
+			rp_mobs.add_task_queue(self, rp_mobs.create_task_queue(mine_decider))
 		end,
 		get_staticdata = rp_mobs.get_staticdata_default,
 		on_step = function(self, dtime, moveresult)

mods/rp_mobs_mobs/mod.conf

@@ -1,5 +1,5 @@
 name = rp_mobs_mobs
 title = Repixture Mobs
 description = Repixture Mobs: Mob definitions, behavior, graphics, models, sounds
-depends = rp_mobs, rp_achievements
+depends = rp_mobs, rp_achievements, rp_tnt
 optional_depends = rp_nav