From 18fe277d949a82fcc6fbc47c734df514d3ea1f52 Mon Sep 17 00:00:00 2001
From: RealBadAngel <maciej.kasatkin@o2.pl>
Date: Sat, 17 May 2014 11:25:25 +0200
Subject: Item entity stacks merge on the ground.

Add TTL to item entities.
---
 builtin/game/item_entity.lua | 134 ++++++++++++++++++++++++++++++++-----------
 1 file changed, 100 insertions(+), 34 deletions(-)

(limited to 'builtin/game')

diff --git a/builtin/game/item_entity.lua b/builtin/game/item_entity.lua
index 4f6988c00..afbade98e 100644
--- a/builtin/game/item_entity.lua
+++ b/builtin/game/item_entity.lua
@@ -8,26 +8,43 @@ function core.spawn_item(pos, item)
 	return obj
 end
 
+-- If item_entity_ttl is not set, enity will have default life time 
+-- Setting it to -1 disables the feature
+
+local time_to_live = tonumber(core.setting_get("item_entity_ttl"))
+if not time_to_live then
+	time_to_live = 900
+end
+
 core.register_entity(":__builtin:item", {
 	initial_properties = {
 		hp_max = 1,
 		physical = true,
 		collide_with_objects = false,
-		collisionbox = {-0.17,-0.17,-0.17, 0.17,0.17,0.17},
-		visual = "sprite",
-		visual_size = {x=0.5, y=0.5},
+		collisionbox = {-0.24, -0.24, -0.24, 0.24, 0.24, 0.24},
+		visual = "wielditem",
+		visual_size = {x = 0.3, y = 0.3},
 		textures = {""},
-		spritediv = {x=1, y=1},
-		initial_sprite_basepos = {x=0, y=0},
+		spritediv = {x = 1, y = 1},
+		initial_sprite_basepos = {x = 0, y = 0},
 		is_visible = false,
 	},
-	
+
 	itemstring = '',
 	physical_state = true,
+	age = 0,
 
 	set_item = function(self, itemstring)
 		self.itemstring = itemstring
 		local stack = ItemStack(itemstring)
+		local count = stack:get_count()
+		local max_count = stack:get_stack_max()
+		if count > max_count then
+			count = max_count
+			self.itemstring = stack:get_name().." "..max_count
+		end
+		local s = 0.15 + 0.15 * (count / max_count)
+		local c = 0.8 * s
 		local itemtable = stack:to_table()
 		local itemname = nil
 		if itemtable then
@@ -41,47 +58,51 @@ core.register_entity(":__builtin:item", {
 		end
 		prop = {
 			is_visible = true,
-			visual = "sprite",
-			textures = {"unknown_item.png"}
+			visual = "wielditem",
+			textures = {itemname},
+			visual_size = {x = s, y = s},
+			collisionbox = {-c, -c, -c, c, c, c},
+			automatic_rotate = math.pi * 0.2,
 		}
-		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 core.serialize({
 			itemstring = self.itemstring,
 			always_collect = self.always_collect,
+			age = self.age
 		})
 	end,
 
-	on_activate = function(self, staticdata)
+	on_activate = function(self, staticdata, dtime_s)
 		if string.sub(staticdata, 1, string.len("return")) == "return" then
 			local data = core.deserialize(staticdata)
 			if data and type(data) == "table" then
 				self.itemstring = data.itemstring
 				self.always_collect = data.always_collect
+				if data.age then 
+					self.age = data.age + dtime_s
+				else
+					self.age = dtime_s
+				end
 			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.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)
+		self.age = self.age + dtime
+		if time_to_live > 0 and self.age > time_to_live then
+			self.itemstring = ''
+			self.object:remove()
+			return
+		end
 		local p = self.object:getpos()
 		p.y = p.y - 0.3
 		local nn = core.get_node(p).name
@@ -89,21 +110,67 @@ core.register_entity(":__builtin:item", {
 		local v = self.object:getvelocity()
 		if not core.registered_nodes[nn] or core.registered_nodes[nn].walkable and v.y == 0 then
 			if self.physical_state then
-				self.object:setvelocity({x=0,y=0,z=0})
-				self.object:setacceleration({x=0, y=0, z=0})
+				local own_stack = ItemStack(self.object:get_luaentity().itemstring)
+				for _,object in ipairs(core.get_objects_inside_radius(p, 0.8)) do
+					local obj = object:get_luaentity()
+					if obj and obj.name == "__builtin:item" and obj.physical_state == false then
+						local stack = ItemStack(obj.itemstring)
+						if own_stack:get_name() == stack:get_name() and stack:get_free_space() > 0 then 
+							local overflow = false
+							local count = stack:get_count() + own_stack:get_count()
+							local max_count = stack:get_stack_max()
+							if count>max_count then
+								overflow = true
+								count = count - max_count
+							else
+								self.itemstring = ''
+							end	
+							local pos=object:getpos() 
+							pos.y = pos.y + (count - stack:get_count()) / max_count * 0.15
+							object:moveto(pos, false)
+							local s, c
+							local max_count = stack:get_stack_max()
+							local name = stack:get_name()
+							if not overflow then
+								obj.itemstring = name.." "..count
+								s = 0.15 + 0.15 * (count / max_count)
+								c = 0.8 * s
+								object:set_properties({
+									visual_size = {x = s, y = s},
+									collisionbox = {-c, -c, -c, c, c, c}
+								})
+								self.object:remove()
+								return
+							else
+								s = 0.3
+								c = 0.24
+								object:set_properties({
+									visual_size = {x = s, y = s},
+									collisionbox = {-c, -c, -c, c, c, c}
+								})
+								obj.itemstring = name.." "..max_count
+								s = 0.15 + 0.15 * (count / max_count)
+								c = 0.8 * s
+								self.object:set_properties({
+									visual_size = {x = s, y = s},
+									collisionbox = {-c, -c, -c, c, c, c}
+								})
+								self.itemstring = name.." "..count
+							end
+						end
+					end
+				end
+				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
-				})
+				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.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
-				})
+				self.object:set_properties({physical = true})
 			end
 		end
 	end,
@@ -120,4 +187,3 @@ core.register_entity(":__builtin:item", {
 		self.object:remove()
 	end,
 })
-
-- 
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