From 67b4ac9310515a29b0686d43060e3e77a543ca5d Mon Sep 17 00:00:00 2001
From: Bram van den Heuvel <bram.vdh1999@gmail.com>
Date: Wed, 1 May 2024 11:26:36 +0200
Subject: [PATCH] Add set_world_depth

---
 API.md   |  2 +-
 init.lua | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 62 insertions(+), 1 deletion(-)

diff --git a/API.md b/API.md
index a00f2e3..de7b8f9 100644
--- a/API.md
+++ b/API.md
@@ -271,7 +271,7 @@ this.
 In case you wish to do a few other operations, here's a few other functions
 that might be helpful to you:
 
-- `noordstar_caves.set_world_height(h)` Set the world's height to a given number.
+- `noordstar_caves.set_world_depth(h)` Set the world's depth to a given number.
 
 This feature is currently only supported in VoxeLibre. Contributions that help
 change the world depth in other games, are very welcome.
diff --git a/init.lua b/init.lua
index 2314bf5..6b857cd 100644
--- a/init.lua
+++ b/init.lua
@@ -28,6 +28,7 @@ local internal =
         , wall = 4
         , ceiling = 5
         , floor_deco = 6
+        , ceiling_deco = 7
         }
 
     -- Point that can be used for generating Voronoi graphs
@@ -53,6 +54,10 @@ local internal =
     -- Average blob size of verticality noise params
     , vrtcl_blob    = { x =  100, y =  250, z =  100 }
 
+    -- Barrier showing the world where areas should be considered as caves
+    -- when determining the weather.
+    , weather_y = 0
+
     -- If another mod doesn't override this value, we will assume that this is
     -- the world's depth.
     , world_depth   = -60
@@ -144,10 +149,64 @@ end
 
 -- Override the world's depth
 function noordstar_caves.set_world_depth(h)
+    if type(h) ~= "number" then
+        return
+    end
+    h = math.round(h)
+
     internal.world_depth = h
+
+    if mcl_vars then
+        -- internal.weather_y = mcl_vars.mg_overworld_min
+
+        mcl_vars.mg_overworld_min = h
+        mcl_vars.mg_bedrock_overworld_min = h
+        mcl_vars.mg_bedrock_overworld_max = h + 4
+        mcl_vars.mg_lava_overworld_max = h + 10
+        mcl_vars.mg_end_max = h - 2000
+        mcl_vars.mg_realm_barrier_overworld_end_max = mcl_vars.mg_end_max
+        mcl_vars.mg_realm_barrier_overworld_end_min = mcl_vars.mg_end_max - 11
+
+        mcl_vars.mg_lava = false
+    end
+
+    if mcl_mapgen then
+        -- internal.weather_y = mcl_mapgen.overworld.min
+
+        mcl_mapgen.overworld.min = h
+        mcl_mapgen.overworld.bedrock_min = h
+        mcl_mapgen.overworld.bedrock_max = mcl_mapgen.overworld.bedrock_min + (mcl_mapgen.bedrock_is_rough and 4 or h)
+        mcl_mapgen.overworld.lava_max = h + 6
+        mcl_mapgen.overworld.railcorridors_height_min = -50
+        mcl_mapgen.overworld.railcorridors_height_max = -2
+        
+        mcl_mapgen.end_.max = h - 2000
+        mcl_mapgen.realm_barrier_overworld_end_max = mcl_mapgen.end_.max
+        mcl_mapgen.realm_barrier_overworld_end_min = mcl_mapgen.end_.max - 11
+
+        if mcl_mapgen.on_settings_changed then
+            mcl_mapgen.on_settings_changed()
+        else
+            minetest.log("error", "The installed version of the mcl_mapgen mod (part of Mineclone 5) "
+            .."does not have an mcl_mapgen.on_settings_changed method. This will likely result in "
+            .."altitudes below the original bedrock being inaccessible to players.")
+        end
+    end
+
 end
 noordstar_caves.set_world_depth(internal.world_depth)
 
+if mcl_worlds then
+    local old_has_weather = mcl_worlds.has_weather
+	mcl_worlds.has_weather = function(pos)
+		-- No weather in the deep caverns
+		if pos.y >= internal.world_depth and pos.y <= internal.weather_y then
+			return false
+		end
+		return old_has_weather(pos)
+	end
+end
+
 -- Remove a specific registered cave biome
 function noordstar_caves.unregister_biome(name)
     noordstar_caves.registered_biomes[name] = nil
@@ -1413,3 +1472,5 @@ noordstar_caves.register_decoration({
     rotation = "random",
     -- place_offset_y = 5,
 })
+
+noordstar_caves.set_world_depth(-993)