workaround for ore generation

changelog.txt

@@ -3,8 +3,10 @@ Version: 2.0.0
 Date: 2024-12-06
   Features:
     - Works with Factorio 2.0 vanilla and Space Age
-      Currently does not work when adding to a ongoing game:
-      https://forums.factorio.com/viewtopic.php?f=7&t=124996
+      Currently uses a workaround to generate ore patches on new chunks when added to an existing
+      game due to an issue, https://forums.factorio.com/viewtopic.php?t=124996
+      And thank's to Eradicator's script to make natural looking ore patches for the workaround,
+      https://forums.factorio.com/viewtopic.php?t=72723
     - Compatibility with other mods is not confirmed, but many will still work
     - Titanium production on Vulcanus and Gleba, recycling on Fulgora. 
       These production chains may need further balancing or updates.

control-util.lua

@@ -95,5 +95,77 @@ function util.warptorio2_expansion_helper()
 end
 
 
+-- A workaround for generating ores until this bug is fixed:
+-- https://forums.factorio.com/viewtopic.php?f=7&t=124996&p=655013#p655013
+function util.ore_workaround(event)
+  for i, ore in pairs(util.me.ores_for_workaround) do
+    if event.surface.map_gen_settings.autoplace_controls["titanium-ore"] then return end
+    if event.surface.name ~= "nauvis" then return end
+    if math.random() < settings.global[util.me.name.."-ore-workaround-probability"].value then
+      util.generate_ore(event, ore.name, ore.amount, ore.tiles)
+    end
+  end
+end
+
+-- The majority of this function was written by Eradicator, see https://forums.factorio.com/viewtopic.php?t=72723
+function util.generate_ore(event, name, amount, tiles)
+  local biases = {[0] = {[0] = 1}}
+  local t = 1
+
+  repeat 
+    t = t + util.grow(biases,t,tiles)
+    until t >= tiles
+
+  local pos = {x=event.position.x*32, y=event.position.y*32}
+  local multiplier = math.max(math.abs(event.position.x), math.abs(event.position.y))
+  if multiplier < 10 then return end  -- don't generate too close to start
+  local total_bias = 0
+  for x,_  in pairs(biases) do for y,bias in pairs(_) do
+    total_bias = total_bias + bias
+    end end
+
+  for x,_  in pairs(biases) do for y,bias in pairs(_) do
+      local entity = {
+        name = name,
+        amount = amount * (bias/total_bias) * multiplier,
+        force = 'neutral',
+        position = {pos.x+x,pos.y+y},
+        }
+      if event.surface.can_place_entity(entity) then
+        event.surface.create_entity(entity)
+      end
+    end end
+  
+end
+
+-- The majority of this function was written by Eradicator, see https://forums.factorio.com/viewtopic.php?t=72723
+function util.grow(grid,t,tiles)
+  local w_max = 256
+  local h_max = 256
+  local abs = math.abs
+  local old = {}
+  local new_count = 0
+  for x,_  in pairs(grid) do for y,__ in pairs(_) do
+    table.insert(old,{x,y})
+    end end
+  for _,pos in pairs(old) do
+    local x,y = pos[1],pos[2]
+    local bias = grid[x][y]
+    for dx=-1,1,1 do for dy=-1,1,1 do
+      local a,b = x+dx, y+dy
+      if (math.random() > 0.9) and (abs(a) < w_max) and (abs(b) < h_max) then
+        grid[a] = grid[a] or {}
+        if not grid[a][b] then
+          grid[a][b] = 1 - (t/tiles)
+          new_count = new_count + 1
+          if (new_count+t) == tiles then return new_count end
+          end
+        end
+      end end
+    end
+  return new_count
+  end
+
+
 
 return util

control.lua

@@ -1,3 +1,5 @@
 local util = require("control-util")
 
 script.on_init(util.check_fluid_mining)
+
+script.on_event(defines.events.on_chunk_generated, util.ore_workaround)

locale/en/titanium.cfg

@@ -53,11 +53,13 @@ titanium-in-foundry=Smelt titanium in an oxygen-free environment
 bztitanium-recipe-bypass=Bypass recipes
 bztitanium-mining-fluid=Titanium mining fluid
 bztitanium-mining-fluid-amount=Titanium mining fluid amount
+bztitanium-ore-workaround-probability=Ore generation workaround probability
 
 [mod-setting-description]
 bztitanium-recipe-bypass=Skip modifying these recipes (comma-separated list).
 bztitanium-mining-fluid=Choose which fluid to use when mining Titanium.\n[color=orange]Lubricant is recommended![/color]
 bztitanium-mining-fluid-amount=Amount of fluid used to mine. Default 3.
+bztitanium-ore-workaround-probability=When using workaround, probability of generating ore on a given chunk. (Only used when mod is added to existing game, if bug in forum post 124996 is not fixed)
 [string-mod-setting]
 bztitanium-mining-fluid-lubricant=Lubricant
 bztitanium-mining-fluid-sulfuric-acid=Sulfuric Acid

me.lua

@@ -3,6 +3,7 @@ local me = {}
 me.name = "bztitanium"
 me.titanium_plate = ""
 me.titanium_processing = ""
+me.ores_for_workaround = {{name="titanium-ore", amount=100000, tiles=300}}
 
 if mods and mods["FactorioExtended-Plus-Core"] then
   me.titanium_plate = "titanium-alloy"

settings.lua

@@ -21,4 +21,12 @@ data:extend({
     minimum_value = 1,
     maximum_value = 1000,
 	},
+  {
+    type = "double-setting",
+    name = "bztitanium-ore-workaround-probability",
+    setting_type = "runtime-global",
+    default_value = .01,
+    minimum_value = .00001,
+    maximum_value = .1,
+	},
 })