From a793747d92d9b1d93153c7fb4e0c82fe90624c78 Mon Sep 17 00:00:00 2001
From: est31 <MTest31@outlook.com>
Date: Thu, 18 Jun 2015 04:16:47 +0200
Subject: [PATCH] Move coal furnaces to other/

---
 technic/machines/HV/nuclear_reactor.lua |  108 +++++++++++++++++++++++++++++++-----------------------
 1 files changed, 62 insertions(+), 46 deletions(-)

diff --git a/technic/machines/HV/nuclear_reactor.lua b/technic/machines/HV/nuclear_reactor.lua
index 19a3c99..a9a13c2 100644
--- a/technic/machines/HV/nuclear_reactor.lua
+++ b/technic/machines/HV/nuclear_reactor.lua
@@ -32,7 +32,8 @@
 	"invsize[8,9;]"..
 	"label[0,0;"..S("Nuclear Reactor Rod Compartment").."]"..
 	"list[current_name;src;2,1;3,2;]"..
-	"list[current_player;main;0,5;8,4;]"
+	"list[current_player;main;0,5;8,4;]"..
+	"listring[]"
 
 -- "Boxy sphere"
 local nodebox = {
@@ -293,7 +294,7 @@
 	tiles = {"technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
 	         "technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png",
 		 "technic_hv_nuclear_reactor_core.png", "technic_hv_nuclear_reactor_core.png"},
-	groups = {cracky=1, technic_machine=1, radioactive=7000, not_in_creative_inventory=1},
+	groups = {cracky=1, technic_machine=1, radioactive=11000, not_in_creative_inventory=1},
 	legacy_facedir_simple = true,
 	sounds = default.node_sound_wood_defaults(),
 	drop="technic:hv_nuclear_reactor_core",
@@ -319,7 +320,7 @@
 		local meta = minetest.get_meta(pos)
 		
 		-- Connected back?
-		if meta:get_int("HV_EU_timeout") > 0 then return end	
+		if meta:get_int("HV_EU_timeout") > 0 then return false end
 		
 		local burn_time = meta:get_int("burn_time") or 0
 
@@ -329,12 +330,11 @@
 			technic.swap_node(pos, "technic:hv_nuclear_reactor_core")
 			meta:set_int("structure_accumulated_badness", 0)
 			siren_clear(pos, meta)
-			return
+			return false
 		end
 		
 		meta:set_int("burn_time", burn_time + 1)
-		local timer = minetest.get_node_timer(pos)
-        	timer:start(1)
+		return true
 	end,
 })
 
@@ -543,19 +543,23 @@
 -- and the group value signifies the strength of the radiation source.
 -- The group value is the distance in millimetres from a node at which
 -- an unshielded player will be damaged by 0.25 HP/s.  Or, equivalently,
--- it is 500 times the square root of the damage rate in HP/s that an
+-- it is 2000 times the square root of the damage rate in HP/s that an
 -- unshielded player 1 m away will take.
 --
 -- Shielding is assessed by sampling every 0.25 m along the path
 -- from the source to the player, ignoring the source node itself.
--- The summed radiation resistance values from the sampled nodes yield
--- a measure of the total amount of radiation resistance on the path.
--- As in reality, shielding causes exponential attenuation of radiation.
--- However, the effect is scaled down relative to real life: each
--- metre-point of shielding, corresponding to a real-life halving of
--- radiation, reduces radiation by 0.01 nepers (a factor of about 1.01).
--- This scales down the difference between shielded and unshielded safe
--- distances, avoiding the latter becoming impractically large.
+-- The summed shielding values from the sampled nodes yield a measure
+-- of the total amount of shielding on the path.  As in reality,
+-- shielding causes exponential attenuation of radiation.  However, the
+-- effect is scaled down relative to real life.  A metre of a node with
+-- radiation resistance value R yields attenuation of sqrt(R)*0.1 nepers.
+-- (In real life it would be about R*0.69 nepers, by the definition
+-- of the radiation resistance values.)  The sqrt part of this formula
+-- scales down the differences between shielding types, reflecting the
+-- game's simplification of making expensive materials such as gold
+-- readily available in cubic metres.  The multiplicative factor in the
+-- formula scales down the difference between shielded and unshielded
+-- safe distances, avoiding the latter becoming impractically large.
 --
 -- Damage is processed at rates down to 0.25 HP/s, which in the absence of
 -- shielding is attained at the distance specified by the "radioactive"
@@ -565,41 +569,53 @@
 -- need to be considered.
 local assumed_abdomen_offset = vector.new(0, 1, 0)
 local assumed_abdomen_offset_length = vector.length(assumed_abdomen_offset)
-minetest.register_abm({
-	nodenames = {"group:radioactive"},
-	interval = 1,
-	chance = 1,
-	action = function (pos, node)
-		local strength = minetest.registered_nodes[node.name].groups.radioactive
-		for _, o in ipairs(minetest.get_objects_inside_radius(pos, strength*0.001 + assumed_abdomen_offset_length)) do
-			if o:is_player() then
-				local rel = vector.subtract(vector.add(o:getpos(), assumed_abdomen_offset), pos)
-				local dist_sq = vector.length_square(rel)
-				local dist = math.sqrt(dist_sq)
-				local dirstep = dist == 0 and vector.new(0,0,0) or vector.divide(rel, dist*4)
-				local intpos = pos
-				local resistance = 0
-				for intdist = 0.25, dist, 0.25 do
-					intpos = vector.add(intpos, dirstep)
-					local intnodepos = vector.round(intpos)
-					if not vector.equals(intnodepos, pos) then
-						resistance = resistance + node_radiation_resistance(minetest.get_node(intnodepos).name)
+local cache_scaled_shielding = {}
+
+local damage_enabled = minetest.setting_getbool("enable_damage")
+
+if damage_enabled then
+	minetest.register_abm({
+		nodenames = {"group:radioactive"},
+		interval = 1,
+		chance = 1,
+		action = function (pos, node)
+			local strength = minetest.registered_nodes[node.name].groups.radioactive
+			for _, o in ipairs(minetest.get_objects_inside_radius(pos, strength*0.001 + assumed_abdomen_offset_length)) do
+				if o:is_player() then
+					local rel = vector.subtract(vector.add(o:getpos(), assumed_abdomen_offset), pos)
+					local dist_sq = vector.length_square(rel)
+					local dist = math.sqrt(dist_sq)
+					local dirstep = dist == 0 and vector.new(0,0,0) or vector.divide(rel, dist*4)
+					local intpos = pos
+					local shielding = 0
+					for intdist = 0.25, dist, 0.25 do
+						intpos = vector.add(intpos, dirstep)
+						local intnodepos = vector.round(intpos)
+						if not vector.equals(intnodepos, pos) then
+							local sname = minetest.get_node(intnodepos).name
+							local sval = cache_scaled_shielding[sname]
+							if not sval then
+								sval = math.sqrt(node_radiation_resistance(sname)) * -0.025
+								cache_scaled_shielding[sname] = sval
+							end
+							shielding = shielding + sval
+						end
 					end
-				end
-				local dmg_rate = 0.25e-6 * strength*strength * math.exp(-0.0025*resistance) / math.max(0.75, dist_sq)
-				if dmg_rate >= 0.25 then
-					local dmg_int = math.floor(dmg_rate)
-					if math.random() < dmg_rate-dmg_int then
-						dmg_int = dmg_int + 1
-					end
-					if dmg_int > 0 then
-						o:set_hp(math.max(o:get_hp() - dmg_int, 0))
+					local dmg_rate = 0.25e-6 * strength*strength * math.exp(shielding) / math.max(0.75, dist_sq)
+					if dmg_rate >= 0.25 then
+						local dmg_int = math.floor(dmg_rate)
+						if math.random() < dmg_rate-dmg_int then
+							dmg_int = dmg_int + 1
+						end
+						if dmg_int > 0 then
+							o:set_hp(math.max(o:get_hp() - dmg_int, 0))
+						end
 					end
 				end
 			end
-		end
-	end,
-})
+		end,
+	})
+end
 
 -- radioactive materials that can result from destroying a reactor
 

--
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