From 97903327a55c975492d33961b6f7b829dff06a8d Mon Sep 17 00:00:00 2001
From: Jude Melton-Houghton <jwmhjwmh@gmail.com>
Date: Fri, 6 May 2022 11:25:02 -0400
Subject: [PATCH] Add option to forego real entities (#26)

---
 default_settings.lua |  1 +
 luaentity.lua        | 52 +++++++++++++++++++++++++++-----------------
 settingtypes.txt     |  3 +++
 3 files changed, 36 insertions(+), 20 deletions(-)

diff --git a/default_settings.lua b/default_settings.lua
index 9f21778..975b1d6 100644
--- a/default_settings.lua
+++ b/default_settings.lua
@@ -27,6 +27,7 @@ local settings = {
 	enable_cyclic_mode = true,
 	drop_on_routing_fail = false,
 	delete_item_on_clearobject = true,
+	use_real_entities = true,
 }
 
 pipeworks.toggles = {}
diff --git a/luaentity.lua b/luaentity.lua
index 83fb4d9..27799dd 100644
--- a/luaentity.lua
+++ b/luaentity.lua
@@ -73,31 +73,43 @@ local function get_blockpos(pos)
 	        z = math.floor(pos.z / 16)}
 end
 
-local active_blocks = {} -- These only contain active blocks near players (i.e., not forceloaded ones)
+local move_entities_globalstep_part1
+local is_active
 
-local move_entities_globalstep_part1 = function(dtime)
-	local active_block_range = tonumber(minetest.settings:get("active_block_range")) or 2
-	local new_active_blocks = {}
-	for _, player in ipairs(minetest.get_connected_players()) do
-		local blockpos = get_blockpos(player:get_pos())
-		local minp = vector.subtract(blockpos, active_block_range)
-		local maxp = vector.add(blockpos, active_block_range)
+if pipeworks.use_real_entities then
+	local active_blocks = {} -- These only contain active blocks near players (i.e., not forceloaded ones)
 
-		for x = minp.x, maxp.x do
-		for y = minp.y, maxp.y do
-		for z = minp.z, maxp.z do
-			local pos = {x = x, y = y, z = z}
-			new_active_blocks[minetest.hash_node_position(pos)] = pos
-		end
-		end
+	move_entities_globalstep_part1 = function(dtime)
+		local active_block_range = tonumber(minetest.settings:get("active_block_range")) or 2
+		local new_active_blocks = {}
+		for _, player in ipairs(minetest.get_connected_players()) do
+			local blockpos = get_blockpos(player:get_pos())
+			local minp = vector.subtract(blockpos, active_block_range)
+			local maxp = vector.add(blockpos, active_block_range)
+
+			for x = minp.x, maxp.x do
+			for y = minp.y, maxp.y do
+			for z = minp.z, maxp.z do
+				local pos = {x = x, y = y, z = z}
+				new_active_blocks[minetest.hash_node_position(pos)] = pos
+			end
+			end
+			end
 		end
+		active_blocks = new_active_blocks
+		-- todo: callbacks on block load/unload
 	end
-	active_blocks = new_active_blocks
-	-- todo: callbacks on block load/unload
-end
 
-local function is_active(pos)
-	return active_blocks[minetest.hash_node_position(get_blockpos(pos))] ~= nil
+	is_active = function(pos)
+		return active_blocks[minetest.hash_node_position(get_blockpos(pos))] ~= nil
+	end
+else
+	move_entities_globalstep_part1 = function()
+	end
+
+	is_active = function()
+		return false
+	end
 end
 
 local entitydef_default = {
diff --git a/settingtypes.txt b/settingtypes.txt
index cd6efbc..bfe7735 100644
--- a/settingtypes.txt
+++ b/settingtypes.txt
@@ -75,3 +75,6 @@ pipeworks_drop_on_routing_fail (Drop On Routing Fail) bool false
 
 #Delete item on clearobject.
 pipeworks_delete_item_on_clearobject (Delete Item On Clearobject) bool true
+
+#Use real visible entities in tubes within active areas.
+pipeworks_use_real_entities (Use real entities) bool true