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powerball.lua

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+minetest.register_node("portalgun:powerballspawner", {
+	description = "Power ball spawner" ,
+	tiles = {"default_steel_block.png","default_steel_block.png","default_steel_block.png","default_steel_block.png","default_steel_block.png","portalgun_powerballspawner.png"},
+	groups = {cracky=2},
+	sounds = default.node_sound_glass_defaults(),
+	is_ground_content = false,
+	paramtype2 = "facedir",
+	on_place = minetest.rotate_node,
+	on_construct = function(pos)
+		minetest.get_node_timer(pos):start(10)
+	end,
+	on_timer = function (pos, elapsed)
+		local dir=minetest.get_node(pos).param2
+		local v={x=0, y=0, z=0}
+		if dir==0 then v.z=-1
+		elseif dir==1 then v.x=-1
+		elseif dir==2 then v.z=1
+		elseif dir==3 then v.x=1
+		elseif dir==8 then v.y=-1
+		elseif dir==4 then v.y=1
+		end
+		local pv={x=pos.x+v.x, y=pos.y+v.y, z=pos.z+v.z}
+		portalgun.new=1
+		local m=minetest.add_entity(pv, "portalgun:powerball")
+		m:set_velocity({x=v.x*4, y=v.y*4, z=v.z*4})
+		return true
+	end,
+})
+
+minetest.register_node("portalgun:powerballspawner2", {
+	description = "Power ball spawner (spawn on activate)" ,
+	tiles = {"default_steel_block.png","default_steel_block.png","default_steel_block.png","default_steel_block.png","default_steel_block.png","portalgun_powerballspawner.png^[colorize:#aaaa0055"},
+	groups = {cracky=2,mesecon=1},
+	sounds = default.node_sound_glass_defaults(),
+	is_ground_content = false,
+	paramtype2 = "facedir",
+	on_place = minetest.rotate_node,
+	mesecons = {effector = {
+		action_on = function (pos, node)
+			local dir=minetest.get_node(pos).param2
+			local v={x=0, y=0, z=0}
+			if dir==0 then v.z=-1
+			elseif dir==1 then v.x=-1
+			elseif dir==2 then v.z=1
+			elseif dir==3 then v.x=1
+			elseif dir==8 then v.y=-1
+			elseif dir==4 then v.y=1
+			end
+			local pv={x=pos.x+v.x, y=pos.y+v.y, z=pos.z+v.z}
+			portalgun.new=1
+			local m=minetest.add_entity(pv, "portalgun:powerball")
+			m:set_velocity({x=v.x*4, y=v.y*4, z=v.z*4})
+		end
+	}}
+})
+
+
+minetest.register_entity("portalgun:powerball",{
+	hp_max = 1000,
+	physical = true,
+	weight = 0,
+	collisionbox = {-0.4,-0.4,-0.4, 0.4,0.4,0.4},
+	visual = "sprite",
+	visual_size = {x=1.1, y=1.1},
+	textures = {"portalgun_powrball.png"},
+	initial_sprite_basepos = {x=0, y=0},
+	is_visible = true,
+	makes_footstep_sound = false,
+	automatic_rotate = false,
+	portalgun=2,
+	powerball=1,
+on_activate= function(self, staticdata)
+	if portalgun.new==0 then
+		self.object:remove()
+		return self
+	end
+	portalgun.new=0
+	local pos=self.object:get_pos()
+	self.sound=minetest.sound_play("portalgun_powerball", {pos=pos,max_hear_distance = 10, gain = 0.5})
+	minetest.sound_play("portalgun_powerballbonce", {pos=pos,max_hear_distance = 10, gain = 1})
+end,
+on_step= function(self, dtime)
+		self.timer=self.timer+dtime
+		if self.timer<0.2 then return self end
+		self.timer=0
+		local pos=self.object:get_pos()
+		for i, ob in pairs(minetest.get_objects_inside_radius(pos, 2)) do
+			if ob:is_player() or (ob:get_luaentity() and ob:get_luaentity().portalgun~=1 and ob:get_luaentity().wsc==nil and ob:get_luaentity().powerball~=1) then
+				ob:set_hp(0)
+				ob:punch(ob, {full_punch_interval=1.0,damage_groups={fleshy=9000}}, "default:bronze_pick", nil)
+
+			end
+		end
+		self.timer2=self.timer2+1
+		self.timer3=self.timer3+1
+		if self.timer3>=9 then
+			self.timer3=0
+			minetest.sound_stop(self.sound)
+			self.sound=minetest.sound_play("portalgun_powerball", {pos=pos,max_hear_distance = 10, gain = 0.5})
+		end
+		if self.timer2>40 then
+			minetest.sound_stop(self.sound)
+			self.object:set_hp(0)
+			self.object:punch(self.object, {full_punch_interval=1.0,damage_groups={fleshy=9000}}, "default:bronze_pick", nil)
+			return self
+		end
+		local v=self.object:get_velocity()
+		local nextn={x=pos.x+(v.x)/3, y=pos.y+(v.y)/3, z=pos.z+(v.z)/3}
+		local nname=minetest.get_node(nextn).name
+		if minetest.registered_nodes[nname].walkable then
+
+			if nname=="portalgun:powerballtarget" and mesecon then
+				mesecon.receptor_on(nextn)
+				minetest.get_node_timer(nextn):start(5)
+			end
+			self.object:set_velocity({x=v.x*-1, y=v.y*-1, z=v.z*-1})
+			minetest.sound_play("portalgun_powerballbonce", {pos=pos,max_hear_distance = 10, gain = 1})
+		end
+	end,
+	timer=0,
+	timer2=0,
+	timer3=0,
+	sound={}
+})
+
+minetest.register_node("portalgun:powerballtarget", {
+	description = "Power ball target" ,
+	tiles = {"portalgun_powerballstarget.png"},
+	groups = {mesecon = 2,cracky=2},
+	mesecons = {receptor = {state = "off"}},
+	sounds = default.node_sound_stone_defaults(),
+	is_ground_content = false,
+	on_timer = function (pos, elapsed)
+		mesecon.receptor_off(pos)
+		return false
+	end,
+})