From 7f0372559bd65a316ce624ad8dd40fd8ab858b76 Mon Sep 17 00:00:00 2001
From: Tim <t4im@users.noreply.github.com>
Date: Fri, 30 Jan 2015 18:18:19 +0100
Subject: optimize vacuum tubes by getting rid of an extra abm, an extra loop
 per abm, table lookups and reduce the necessary search distance a bit

---
 vacuum_tubes.lua | 84 +++++++++++++++++++++++---------------------------------
 1 file changed, 35 insertions(+), 49 deletions(-)

(limited to 'vacuum_tubes.lua')

diff --git a/vacuum_tubes.lua b/vacuum_tubes.lua
index c1560cb..1e9df6c 100644
--- a/vacuum_tubes.lua
+++ b/vacuum_tubes.lua
@@ -10,23 +10,7 @@ if pipeworks.enable_sand_tube then
 
 	pipeworks.register_tube("pipeworks:sand_tube", "Vacuuming Pneumatic Tube Segment", sand_plain_textures, sand_noctr_textures, sand_end_textures,
 				sand_short_texture, sand_inv_texture,
-				{groups = {sand_tube = 1}})
-
-	minetest.register_abm({nodenames = {"group:sand_tube"},
-			       interval = 1,
-			       chance = 1,
-			       action = function(pos, node, active_object_count, active_object_count_wider)
-				       for _, object in ipairs(minetest.get_objects_inside_radius(pos, 2)) do
-					       if not object:is_player() and object:get_luaentity() and object:get_luaentity().name == "__builtin:item" then
-						       if object:get_luaentity().itemstring ~= "" then
-							       pipeworks.tube_inject_item(pos, pos, vector.new(0, 0, 0), object:get_luaentity().itemstring)
-						       end
-						       object:get_luaentity().itemstring = ""
-						       object:remove()
-					       end
-				       end
-			       end
-	})
+				{groups = {vacuum_tube = 1}})
 
 	minetest.register_craft( {
 		output = "pipeworks:sand_tube_1 2",
@@ -66,7 +50,7 @@ if pipeworks.enable_mese_sand_tube then
 
 	pipeworks.register_tube("pipeworks:mese_sand_tube", "Adjustable Vacuuming Pneumatic Tube Segment", mese_sand_plain_textures, mese_sand_noctr_textures,
 				mese_sand_end_textures, mese_sand_short_texture,mese_sand_inv_texture,
-				{groups = {mese_sand_tube = 1},
+				{groups = {vacuum_tube = 1},
 				 on_construct = function(pos)
 					 local meta = minetest.get_meta(pos)
 					 meta:set_int("dist", 0)
@@ -83,36 +67,6 @@ if pipeworks.enable_mese_sand_tube then
 				 end,
 	})
 
-	local function get_objects_with_square_radius(pos, rad)
-		rad = rad + .5;
-		local objs = {}
-		for _,object in ipairs(minetest.get_objects_inside_radius(pos, math.sqrt(3)*rad)) do
-			if not object:is_player() and object:get_luaentity() and object:get_luaentity().name == "__builtin:item" then
-				local opos = object:getpos()
-				if pos.x - rad <= opos.x and opos.x <= pos.x + rad and pos.y - rad <= opos.y and opos.y <= pos.y + rad and pos.z - rad <= opos.z and opos.z <= pos.z + rad then
-					objs[#objs + 1] = object
-				end
-			end
-		end
-		return objs
-	end
-
-	minetest.register_abm({nodenames = {"group:mese_sand_tube"},
-			       interval = 1,
-			       chance = 1,
-			       action = function(pos, node, active_object_count, active_object_count_wider)
-				       for _,object in ipairs(get_objects_with_square_radius(pos, minetest.get_meta(pos):get_int("dist"))) do
-					       if not object:is_player() and object:get_luaentity() and object:get_luaentity().name == "__builtin:item" then
-						       if object:get_luaentity().itemstring ~= "" then
-							       pipeworks.tube_inject_item(pos, pos, vector.new(0, 0, 0), object:get_luaentity().itemstring)
-						       end
-						       object:get_luaentity().itemstring = ""
-						       object:remove()
-					       end
-				       end
-			       end
-	})
-
 	minetest.register_craft( {
 		output = "pipeworks:mese_sand_tube_1 2",
 		recipe = {
@@ -135,7 +89,7 @@ if pipeworks.enable_mese_sand_tube then
 		type = "shapeless",
 		output = "pipeworks:mese_sand_tube_1",
 		recipe = {
-	  "pipeworks:sand_tube_1",
+			"pipeworks:sand_tube_1",
 			"default:mese_crystal_fragment",
 			"default:mese_crystal_fragment",
 			"default:mese_crystal_fragment",
@@ -143,3 +97,35 @@ if pipeworks.enable_mese_sand_tube then
 		},
 	})
 end
+
+local function vacuum(pos, radius)
+	radius = radius + 0.5
+	for _, object in pairs(minetest.get_objects_inside_radius(pos, math.sqrt(2) * radius)) do
+		local lua_entity = object:get_luaentity()
+		if not object:is_player() and lua_entity and lua_entity.name == "__builtin:item" then
+			local obj_pos = object:getpos()
+			if pos.x - radius <= obj_pos.x and obj_pos.x <= pos.x + radius
+			and pos.y - radius <= obj_pos.y and obj_pos.y <= pos.y + radius
+			and pos.z - radius <= obj_pos.z and obj_pos.z <= pos.z + radius then
+				if lua_entity.itemstring ~= "" then
+					pipeworks.tube_inject_item(pos, pos, vector.new(0, 0, 0), lua_entity.itemstring)
+					lua_entity.itemstring = ""
+				end
+				object:remove()
+			end
+		end
+	end
+end
+
+minetest.register_abm({nodenames = {"group:vacuum_tube"},
+			interval = 1,
+			chance = 1,
+			action = function(pos, node, active_object_count, active_object_count_wider)
+				if node.name == "pipeworks:sand_tube" then
+					vacuum(pos, 2)
+				else
+					local radius = minetest.get_meta(pos):get_int("dist")
+					vacuum(pos, radius)
+				end
+			end
+})
-- 
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