Add in creeper basic prototype

mods/ENTITIES/mcl_mobs/api/api.lua

@@ -156,6 +156,7 @@ dofile(api_path .. "environment.lua")
 dofile(api_path .. "interaction.lua")
 dofile(api_path .. "movement.lua")
 dofile(api_path .. "set_up.lua")
+dofile(api_path .. "attack_type_instructions.lua")
 
 
 mobs.spawning_mobs = {}
@@ -319,6 +320,8 @@ function mobs:register_mob(name, def)
 		jump_only = def.jump_only,
 		hostile = def.hostile,
 		neutral = def.neutral,
+		attacking = nil,
+		visual_size_origin = def.visual_size or {x = 1, y = 1, z = 1},
 		--end j4i stuff
 
 		-- MCL2 extensions

mods/ENTITIES/mcl_mobs/api/mob_functions/ai.lua

@@ -93,9 +93,8 @@ local land_state_list_wandering = {"stand", "walk"}
 
 local land_state_switch = function(self, dtime)
 
-
-	if self.hostile and attack then
-		self.state = 
+	if self.hostile and self.attacking then
+		self.state = "attack"
 		return
 	end
 
@@ -132,6 +131,11 @@ local land_state_execution = function(self,dtime)
 		--set the velocity of the mob
 		mobs.set_velocity(self,0)
 
+		--animation fixes for explosive mobs
+		if self.attack_type == "explode" then
+			mobs.reverse_explosion_animation(self,dtime)
+		end
+
 	elseif self.state == "walk" then
 
 		self.walk_timer = self.walk_timer - dtime
@@ -178,13 +182,20 @@ local land_state_execution = function(self,dtime)
 			mobs.set_velocity(self,self.walk_velocity)
 		end
 
+		--animation fixes for explosive mobs
+		if self.attack_type == "explode" then
+			mobs.reverse_explosion_animation(self,dtime)
+		end
+
 	elseif self.state == "run" then
 
 		print("run")
 
 	elseif self.state == "attack" then
 
-		print("attack")
+		if self.attack_type == "explode" then
+			mobs.explode_attack_walk(self, dtime)
+		end
 
 	end	
 	
@@ -587,6 +598,29 @@ mobs.mob_step = function(self, dtime)
 		return false
 	end
 
+
+	if self.hostile then
+		--true for line_of_sight is debug
+		--10 for radius is debug
+		--1 for eye height adjust is debug
+		local attacking = mobs.detect_closest_player_within_radius(self,true,10,1)
+
+		--go get the closest player ROAR >:O
+		if attacking then
+			self.attacking = attacking
+		--no player in area
+		else
+
+			--reset states when coming out of hostile state
+			if self.attacking ~= nil then
+				self.state_timer = -1
+			end
+
+			self.attacking = nil
+		end
+	end
+
+
 	--jump only (like slimes)
 	if self.jump_only then
 		jump_state_switch(self, dtime)
@@ -606,21 +640,7 @@ mobs.mob_step = function(self, dtime)
 	end
 
 
-	if self.hostile then
-		--true for line_of_sight is debug
-		--10 for radius is debug
-		--1 for eye height adjust is debug
-		local attacking = mobs.detect_closest_player_within_radius(self,true,10,1)
 
-		--go get the closest player ROAR >:O
-		if attacking then
-			self.attack = attacking
-
-		--no player in area
-		else
-			self.attack = nil
-		end
-	end
 
 	-- can mob be pushed, if so calculate direction -- do this last (overrides everything)
 	if self.pushable then

mods/ENTITIES/mcl_mobs/api/mob_functions/animation.lua

@@ -1,11 +1,12 @@
 local math_pi     = math.pi
 local math_floor  = math.floor
+local math_random = math.random
 local HALF_PI     = math_pi/2
 
 
-
-local vector_distance = vector.distance
-local vector_new      = vector.new
+local vector_direction = vector.direction
+local vector_distance  = vector.distance
+local vector_new       = vector.new
 
 local minetest_dir_to_yaw = minetest.dir_to_yaw
 
@@ -114,6 +115,28 @@ mobs.movement_rotation_lock = function(self)
 end
 
 
+--this is used when a mob is chasing a player
+mobs.set_yaw_while_attacking = function(self)
+
+	if self.object:get_properties().automatic_face_movement_dir then
+		self.object:set_properties{automatic_face_movement_dir = false}
+	end
+
+	--turn positions into pseudo 2d vectors
+	local pos1 = self.object:get_pos()
+	pos1.y = 0
+
+	local pos2 = self.attacking:get_pos()
+	pos2.y = 0
+
+	local new_direction = vector_direction(pos1,pos2)
+	local new_yaw = minetest_dir_to_yaw(new_direction)
+
+	self.object:set_yaw(new_yaw)
+	self.yaw = new_yaw
+end
+
+
 local calculate_pitch = function(self)
 	local pos  = self.object:get_pos()
 	local pos2 = self.old_pos
@@ -157,3 +180,24 @@ mobs.set_static_pitch = function(self)
 	self.object:set_rotation(current_rotation)
 	self.pitch_switchfdas = "static"
 end
+
+--this is a helper function for mobs explosion animation
+mobs.handle_explosion_animation = function(self)
+
+	--secondary catch-all
+	if not self.explosion_animation then
+		self.explosion_animation = 0
+	end
+
+	--the timer works from 0 for sense of a 0 based counting
+	--but this just bumps it up so it's usable in here
+	local explosion_timer_adjust = self.explosion_animation + 1
+
+
+	local visual_size_modified = table.copy(self.visual_size_origin)
+
+	visual_size_modified.x = visual_size_modified.x * (explosion_timer_adjust ^ 3)
+	visual_size_modified.y = visual_size_modified.y * explosion_timer_adjust
+
+	self.object:set_properties({visual_size = visual_size_modified})
+end

mods/ENTITIES/mcl_mobs/api/mob_functions/attack_type_instructions.lua

@@ -0,0 +1,60 @@
+local vector_direction = vector.direction
+local minetest_dir_to_yaw = minetest.dir_to_yaw
+local vector_distance = vector.distance
+
+
+mobs.explode_attack_walk = function(self,dtime)
+
+    --this needs an exception
+    if self.attacking == nil or not self.attacking:is_player() then
+        self.attacking = nil
+        return
+    end
+
+    mobs.set_yaw_while_attacking(self)
+
+    --make mob walk up to player within 2 nodes distance then start exploding
+
+    --THIS NEEDS TO BE RECODED TO TAKE COLLISION BOXES INTO ACCOUNT!!!
+    if vector_distance(self.object:get_pos(), self.attacking:get_pos()) >= self.reach then
+        mobs.set_velocity(self, self.run_velocity)
+        mobs.set_mob_animation(self,"run")
+
+        mobs.reverse_explosion_animation(self,dtime)
+    else
+        mobs.set_velocity(self,0)
+
+        --this is the only way I can reference this without dumping extra data on all mobs
+        if not self.explosion_animation then
+            self.explosion_animation = 0
+        end
+        mobs.set_mob_animation(self,"stand")
+
+        mobs.handle_explosion_animation(self)
+
+        self.explosion_animation = self.explosion_animation + (dtime/3)
+    end
+    
+
+    --do biggening explosion thing
+    if self.explosion_animation and self.explosion_animation > self.explosion_timer then
+        mcl_explosions.explode(self.object:get_pos(), self.explosion_strength)
+        self.object:remove()
+    end
+end
+
+
+--this is a small helper function to make working with explosion animations easier
+mobs.reverse_explosion_animation = function(self,dtime)
+
+
+    --if explosion animation was greater than 0 then reverse it
+    if self.explosion_animation ~= nil and self.explosion_animation > 0 then
+        self.explosion_animation = self.explosion_animation - dtime
+        if self.explosion_animation < 0 then
+            self.explosion_animation = 0
+        end
+    end
+
+    mobs.handle_explosion_animation(self)
+end

mods/ENTITIES/mobs_mc/creeper.lua

@@ -169,8 +169,8 @@ mobs:register_mob("mobs_mc:creeper_charged", {
 	explosion_radius = 8,
 	explosion_damage_radius = 8,
 	explosiontimer_reset_radius = 6,
-	reach = 3,
-	explosion_timer = 1.5,
+	reach = 2,
+	explosion_timer = 0.75,
 	allow_fuse_reset = true,
 	stop_to_explode = true,