Add in prototype jump-only mobs api

mods/ENTITIES/mcl_mobs/api/api.lua

@@ -314,7 +314,7 @@ function mobs:register_mob(name, def)
 		swim = def.swim,
 		swim_in = def.swim_in or {mobs_mc.items.water_source, "mcl_core:water_flowing", mobs_mc.items.river_water_source},
 		pitch_switch = "static",
-		--set_animation = mobs.set_animation,
+		jump_only = def.jump_only,
 		--end j4i stuff
 
 		-- MCL2 extensions

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

@@ -342,7 +342,7 @@ local fly_state_switch = function(self, dtime)
 end
 
 
---check if a mob needs to turn while flyming
+--check if a mob needs to turn while flying
 local fly_turn_check = function(self,dtime)
 
     local pos = self.object:get_pos()
@@ -446,8 +446,115 @@ local fly_state_execution = function(self,dtime)
 end
 
 
+--[[
+   ___                       
+  |_  |                      
+    | |_   _ _ __ ___  _ __  
+    | | | | | '_ ` _ \| '_ \ 
+/\__/ / |_| | | | | | | |_) |
+\____/ \__,_|_| |_| |_| .__/ 
+                      | |    
+                      |_|    
+]]--
 
 
+--check if a mob needs to turn while jumping
+local jump_turn_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
+
+    vector_multiply(dir, radius)
+
+    local test_dir = vector.add(pos,dir)
+
+	local green_flag_1 = minetest_get_item_group(minetest_get_node(test_dir).name, "solid") ~= 0
+
+	return(green_flag_1)
+end
+
+-- state switching logic (stand, jump, run, attacks)
+local jump_state_list_wandering = {"stand", "jump"}
+
+local jump_state_switch = function(self, dtime)
+	self.state_timer = self.state_timer - dtime
+	if self.wandering and self.state_timer <= 0 then
+		self.state_timer = math.random(4,10) + math.random()
+		self.state = jump_state_list_wandering[math.random(1,#jump_state_list_wandering)]
+	end
+end
+
+-- states are executed here
+local jump_state_execution = function(self,dtime)
+
+	local pos = self.object:get_pos()
+	local collisionbox = self.object:get_properties().collisionbox
+	--get the center of the mob
+	pos.y = pos.y + (collisionbox[2] + collisionbox[5] / 2)
+	local current_node = minetest_get_node(pos).name
+
+	local float_now = false
+
+	--recheck if in water or lava
+	if minetest_get_item_group(current_node, "water") ~= 0 or minetest_get_item_group(current_node, "lava") ~= 0 then
+		float_now = true
+	end
+
+	if self.state == "stand" then
+
+		--do animation
+		mobs.set_mob_animation(self, "stand")
+
+		--set the velocity of the mob
+		mobs.set_velocity(self,0)
+
+	elseif self.state == "jump" then
+
+		self.walk_timer = self.walk_timer - dtime
+
+		--reset the jump timer
+		if self.walk_timer <= 0 then
+
+			--re-randomize the jump timer
+			self.walk_timer = math.random(1,6) + math.random()
+
+			--set the mob into a random direction
+			self.yaw = (math_random() * (math.pi * 2))
+		end
+
+		--do animation
+		mobs.set_mob_animation(self, "walk")
+
+		--enable rotation locking
+		mobs.movement_rotation_lock(self)
+
+		--jumping mobs are more loosey goosey
+		if node_in_front_of == 1 then
+			quick_rotate(self,dtime)
+		end
+
+		--only move forward if path is clear
+		mobs.jump_move(self,self.walk_velocity)
+
+	elseif self.state == "run" then
+
+		print("run")
+
+	elseif self.state == "attack" then
+
+		print("attack")
+
+	end	
+	
+	if float_now then
+		mobs.float(self)
+	end
+end
+
 
 
 
@@ -470,8 +577,12 @@ mobs.mob_step = function(self, dtime)
 		return false
 	end
 
+	--jump only (like slimes)
+	if self.jump_only then
+		jump_state_switch(self, dtime)
+		jump_state_execution(self, dtime)		
 	--swimming
-	if self.swim then
+	elseif self.swim then
 		swim_state_switch(self, dtime)
 		swim_state_execution(self, dtime)
 	--flying

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

@@ -221,6 +221,54 @@ mobs.set_fly_velocity = function(self, v)
 	}
 
 
+	local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
+
+	if vector_length(new_velocity_addition) > vector_length(goal_velocity) then
+		vector.multiply(new_velocity_addition, (vector_length(goal_velocity) / vector_length(new_velocity_addition)))
+	end
+
+	--smooths out mobs a bit
+	if vector_length(new_velocity_addition) >= 0.0001 then
+		self.object:add_velocity(new_velocity_addition)
+	end
+end
+
+
+--[[
+   ___                       
+  |_  |                      
+    | |_   _ _ __ ___  _ __  
+    | | | | | '_ ` _ \| '_ \ 
+/\__/ / |_| | | | | | | |_) |
+\____/ \__,_|_| |_| |_| .__/ 
+                      | |    
+                      |_|    
+]]--
+
+--special mob jump movement
+mobs.jump_move = function(self, velocity)
+
+    if self.object:get_velocity().y ~= 0 or not self.old_velocity or (self.old_velocity and self.old_velocity.y > 0) then
+        return
+    end
+
+	--make the mob stick for a split second
+	mobs.set_velocity(self,0)
+
+	--fallback velocity to allow modularity
+    jump_height = 8
+
+	local yaw = (self.yaw or 0)
+
+	local current_velocity = self.object:get_velocity()
+
+	local goal_velocity = {
+		x = (math_sin(yaw) * -velocity),
+		y = jump_height,
+		z = (math_cos(yaw) * velocity),
+	}
+
+
 	local new_velocity_addition = vector.subtract(goal_velocity,current_velocity)
 
 	if vector_length(new_velocity_addition) > vector_length(goal_velocity) then

mods/ENTITIES/mobs_mc/slime+magma_cube.lua

@@ -64,6 +64,7 @@ local slime_big = {
 	hp_max = 16,
 	xp_min = 4,
 	xp_max = 4,
+	rotate = 270,
 	collisionbox = {-1.02, -0.01, -1.02, 1.02, 2.03, 1.02},
 	visual_size = {x=12.5, y=12.5},
 	textures = {{"mobs_mc_slime.png"}},
@@ -100,6 +101,7 @@ local slime_big = {
 	view_range = 16,
 	attack_type = "dogfight",
 	passive = false,
+	jump_only = true,
 	jump = true,
 	walk_velocity = 2.5,
 	run_velocity = 2.5,
@@ -311,6 +313,7 @@ local magma_cube_big = {
 	},
 	walk_velocity = 4,
 	run_velocity = 4,
+	rotate = 270,
 	damage = 6,
 	reach = 3,
 	armor = 53,
@@ -343,6 +346,7 @@ local magma_cube_big = {
 	view_range = 16,
 	attack_type = "dogfight",
 	passive = false,
+	jump_only = true,
 	jump = true,
 	jump_height = 8,
 	walk_chance = 0,