From 3d7502f66645e785bc6f9a49deceaf74f5f2d008 Mon Sep 17 00:00:00 2001
From: Wuzzy <almikes@aol.com>
Date: Fri, 10 Feb 2017 06:01:20 +0100
Subject: [PATCH] Automatically parse solid groups

---
 API.md                      |  2 ++
 mods/mcl_autogroup/init.lua | 18 ++++++++++++++++++
 mods/mcl_autogroup/mod.conf |  1 +
 3 files changed, 21 insertions(+)
 create mode 100644 mods/mcl_autogroup/init.lua
 create mode 100644 mods/mcl_autogroup/mod.conf

diff --git a/API.md b/API.md
index 884941df7..e426a5b06 100644
--- a/API.md
+++ b/API.md
@@ -49,6 +49,8 @@ This section explains all the used groups in this subgame.
 ### Declarative groups
 These groups are used mostly for informational purposes
 
+* `solid=1`: Solid block (automatically assigned)
+* `not_solid=1`: Block is sold (only assign this group for nodes which are automatically detected as “solid” in error
 * `water=1`: Water
 * `lava=1`: Lava
 * `liquid`: Block is a liquid
diff --git a/mods/mcl_autogroup/init.lua b/mods/mcl_autogroup/init.lua
new file mode 100644
index 000000000..b0e9b8ad7
--- /dev/null
+++ b/mods/mcl_autogroup/init.lua
@@ -0,0 +1,18 @@
+-- Automatically assign the “solid” group for solid nodes
+local overwrite = function()
+	for nname, ndef in pairs(minetest.registered_nodes) do
+		if (ndef.walkable == nil or ndef.walkable == true)
+				and (ndef.collision_box == nil or ndef.collision_box.type == "regular")
+				and (ndef.node_box == nil or ndef.node_box.type == "regular")
+				and (ndef.groups.falling_node == 0 or ndef.groups.falling_node == nil)
+				and (ndef.groups.not_solid == 0 or ndef.groups.not_solid == nil) then
+			local groups = table.copy(ndef.groups)
+			groups.solid = 1
+			minetest.override_item(nname, {
+				groups = groups
+			})
+		end
+	end
+end
+
+overwrite()
diff --git a/mods/mcl_autogroup/mod.conf b/mods/mcl_autogroup/mod.conf
new file mode 100644
index 000000000..ec7796657
--- /dev/null
+++ b/mods/mcl_autogroup/mod.conf
@@ -0,0 +1 @@
+name = mcl_autogroup