Added builtin_item

mods/builtin_item/README.txt

@@ -0,0 +1,38 @@
+=== BUILTIN_ITEM MOD for MINETEST-C55 ===
+by PilzAdam
+
+Features:
+This mod adds some new features to the builtin items:
+- The items are pushed by flowing water
+- The items are destroyed by lava
+- The items are removed after 300 seconds or the time that is specified by
+   remove_items in minetest.conf (0 disables it)
+
+How to install:
+Unzip the archive an place it in minetest-base-directory/mods/minetest/
+if you have a windows client or a linux run-in-place client. If you have
+a linux system-wide instalation place it in ~/.minetest/mods/minetest/.
+If you want to install this mod only in one world create the folder
+worldmods/ in your worlddirectory.
+For further information or help see:
+http://wiki.minetest.com/wiki/Installing_Mods
+
+License:
+WTFPL (see below)
+
+See also:
+http://minetest.net/
+
+         DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+                    Version 2, December 2004
+
+ Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
+
+ Everyone is permitted to copy and distribute verbatim or modified
+ copies of this license document, and changing it is allowed as long
+ as the name is changed.
+
+            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. You just DO WHAT THE FUCK YOU WANT TO. 

mods/builtin_item/init.lua

@@ -0,0 +1,186 @@
+minetest.register_entity(":__builtin:item", {
+	initial_properties = {
+		hp_max = 1,
+		physical = true,
+		collisionbox = {-0.17,-0.17,-0.17, 0.17,0.17,0.17},
+		visual = "sprite",
+		visual_size = {x=0.5, y=0.5},
+		textures = {""},
+		spritediv = {x=1, y=1},
+		initial_sprite_basepos = {x=0, y=0},
+		is_visible = false,
+		timer = 0,
+	},
+	
+	itemstring = '',
+	physical_state = true,
+
+	set_item = function(self, itemstring)
+		self.itemstring = itemstring
+		local stack = ItemStack(itemstring)
+		local itemtable = stack:to_table()
+		local itemname = nil
+		if itemtable then
+			itemname = stack:to_table().name
+		end
+		local item_texture = nil
+		local item_type = ""
+		if minetest.registered_items[itemname] then
+			item_texture = minetest.registered_items[itemname].inventory_image
+			item_type = minetest.registered_items[itemname].type
+		end
+		prop = {
+			is_visible = true,
+			visual = "sprite",
+			textures = {"unknown_item.png"}
+		}
+		if item_texture and item_texture ~= "" then
+			prop.visual = "sprite"
+			prop.textures = {item_texture}
+			prop.visual_size = {x=0.50, y=0.50}
+		else
+			prop.visual = "wielditem"
+			prop.textures = {itemname}
+			prop.visual_size = {x=0.20, y=0.20}
+			prop.automatic_rotate = math.pi * 0.25
+		end
+		self.object:set_properties(prop)
+	end,
+
+	get_staticdata = function(self)
+		--return self.itemstring
+		return minetest.serialize({
+			itemstring = self.itemstring,
+			always_collect = self.always_collect,
+			timer = self.timer,
+		})
+	end,
+
+	on_activate = function(self, staticdata, dtime_s)
+		if string.sub(staticdata, 1, string.len("return")) == "return" then
+			local data = minetest.deserialize(staticdata)
+			if data and type(data) == "table" then
+				self.itemstring = data.itemstring
+				self.always_collect = data.always_collect
+				self.timer = data.timer
+				if not self.timer then
+					self.timer = 0
+				end
+				self.timer = self.timer+dtime_s
+			end
+		else
+			self.itemstring = staticdata
+		end
+		self.object:set_armor_groups({immortal=1})
+		self.object:setvelocity({x=0, y=2, z=0})
+		self.object:setacceleration({x=0, y=-10, z=0})
+		self:set_item(self.itemstring)
+	end,
+	
+	on_step = function(self, dtime)
+		local time = tonumber(minetest.setting_get("remove_items"))
+		if not time then
+			time = 300
+		end
+		if not self.timer then
+			self.timer = 0
+		end
+		self.timer = self.timer + dtime
+		if time ~= 0 and (self.timer > time) then
+			self.object:remove()
+		end
+		
+		local p = self.object:getpos()
+		
+		local name = minetest.env:get_node(p).name
+		if name == "default:lava_flowing" or name == "default:lava_source" then
+			minetest.sound_play("builtin_item_lava", {pos=self.object:getpos()})
+			self.object:remove()
+			return
+		end
+		
+		if minetest.registered_nodes[name].liquidtype == "flowing" then
+			get_flowing_dir = function(self)
+				local pos = self.object:getpos()
+				local param2 = minetest.env:get_node(pos).param2
+				for i,d in ipairs({-1, 1, -1, 1}) do
+					if i<3 then
+						pos.x = pos.x+d
+					else
+						pos.z = pos.z+d
+					end
+					
+					local name = minetest.env:get_node(pos).name
+					local par2 = minetest.env:get_node(pos).param2
+					if name == "default:water_flowing" and par2 < param2 then
+						return pos
+					end
+					
+					if i<3 then
+						pos.x = pos.x-d
+					else
+						pos.z = pos.z-d
+					end
+				end
+			end
+			
+			local vec = get_flowing_dir(self)
+			if vec then
+				local v = self.object:getvelocity()
+				if vec and vec.x-p.x > 0 then
+					self.object:setvelocity({x=0.5,y=v.y,z=0})
+				elseif vec and vec.x-p.x < 0 then
+					self.object:setvelocity({x=-0.5,y=v.y,z=0})
+				elseif vec and vec.z-p.z > 0 then
+					self.object:setvelocity({x=0,y=v.y,z=0.5})
+				elseif vec and vec.z-p.z < 0 then
+					self.object:setvelocity({x=0,y=v.y,z=-0.5})
+				end
+				self.object:setacceleration({x=0, y=-10, z=0})
+				self.physical_state = true
+				self.object:set_properties({
+					physical = true
+				})
+				return
+			end
+		end
+		
+		p.y = p.y - 0.3
+		local nn = minetest.env:get_node(p).name
+		-- If node is not registered or node is walkably solid
+		if not minetest.registered_nodes[nn] or minetest.registered_nodes[nn].walkable then
+			if self.physical_state then
+				self.object:setvelocity({x=0,y=0,z=0})
+				self.object:setacceleration({x=0, y=0, z=0})
+				self.physical_state = false
+				self.object:set_properties({
+					physical = false
+				})
+			end
+		else
+			if not self.physical_state then
+				self.object:setvelocity({x=0,y=0,z=0})
+				self.object:setacceleration({x=0, y=-10, z=0})
+				self.physical_state = true
+				self.object:set_properties({
+					physical = true
+				})
+			end
+		end
+	end,
+
+	on_punch = function(self, hitter)
+		if self.itemstring ~= '' then
+			local left = hitter:get_inventory():add_item("main", self.itemstring)
+			if not left:is_empty() then
+				self.itemstring = left:to_string()
+				return
+			end
+		end
+		self.object:remove()
+	end,
+})
+
+if minetest.setting_get("log_mods") then
+	minetest.log("action", "builtin_item loaded")
+end