From 7d93272caa4503979abb9b98a05a9b801870a72b Mon Sep 17 00:00:00 2001
From: Auke Kok <sofar@foo-projects.org>
Date: Thu, 31 Mar 2016 21:58:59 -0700
Subject: [PATCH] Change how dirt turns to dirt_with_(something)
This changes how dirt blocks turn to dirt_with -grass, -dry_grass
or -snow.
Previously, dirt that was sunlit would turn to dirt_with_grass no
matter what, but this happened without any context, so you could
get green patches of dirt_with_grass in the middle of a savannah or
even desert.
Dirt no longer turns to covered dirt unless it's within 1 node from
another dirt_with_grass or dirt_with_dry_grass or dirt_with_snow.
This makes dirt_with_grass "growback" a lot slower, since it now only
happens on the edges, but it retains the context nicely now.
If there is any dirt with a grass or dry grass plant, or snow on top,
and enough light, we'll convert it sporadically to dirt_with_grass
or dirt_with_dry_grass or dirt_with_snow.
This allows us to plant grass of our choice in a large dirt patch,
or in a region where otherwise that type of grass is not present.
This used to be done by 2 abms, but I've combined them in to a single
ABM that is ordered to run with maximum efficiency, solving for the
most common outcome first before attempting more complex checks.
---
mods/default/functions.lua | 61 ++++++++++++++++++++++++++++++--------
1 file changed, 49 insertions(+), 12 deletions(-)
diff --git a/mods/default/functions.lua b/mods/default/functions.lua
index bd55d32..775803b 100644
--- a/mods/default/functions.lua
+++ b/mods/default/functions.lua
@@ -353,32 +353,69 @@ minetest.register_abm({
--
--- Grass growing on well-lit dirt
+-- Convert dirt to something that fits the environment
--
minetest.register_abm({
nodenames = {"default:dirt"},
- neighbors = {"air"},
+ neighbors = {
+ "default:dirt_with_grass",
+ "default:dirt_with_dry_grass",
+ "default:dirt_with_snow",
+ "default:grass_1",
+ "default:grass_2",
+ "default:grass_3",
+ "default:grass_4",
+ "default:grass_5",
+ "default:dry_grass_1",
+ "default:dry_grass_2",
+ "default:dry_grass_3",
+ "default:dry_grass_4",
+ "default:dry_grass_5",
+ "default:snow",
+ },
interval = 6,
chance = 67,
catch_up = false,
action = function(pos, node)
+ -- Most likely case, half the time it's too dark for this.
local above = {x = pos.x, y = pos.y + 1, z = pos.z}
- local name = minetest.get_node(above).name
- local nodedef = minetest.registered_nodes[name]
- if nodedef and (nodedef.sunlight_propagates or nodedef.paramtype == "light") and
- nodedef.liquidtype == "none" and
- (minetest.get_node_light(above) or 0) >= 13 then
- if name == "default:snow" or name == "default:snowblock" then
- minetest.set_node(pos, {name = "default:dirt_with_snow"})
- else
- minetest.set_node(pos, {name = "default:dirt_with_grass"})
+ if (minetest.get_node_light(above) or 0) < 13 then
+ return
+ end
+
+ -- Look for likely neighbors.
+ local p2 = minetest.find_node_near(pos, 1, {"default:dirt_with_grass",
+ "default:dirt_with_dry_grass", "default:dirt_with_snow"})
+ if p2 then
+ -- But the node needs to be under air in this case.
+ local n2 = minetest.get_node(above)
+ if n2 and n2.name == "air" then
+ local n3 = minetest.get_node(p2)
+ minetest.set_node(pos, {name = n3.name})
+ return
end
end
+
+ -- Anything on top?
+ local n2 = minetest.get_node(above)
+ if not n2 then
+ return
+ end
+
+ local name = n2.name
+ -- Snow check is cheapest, so comes first.
+ if name == "default:snow" then
+ minetest.set_node(pos, {name = "default:dirt_with_snow"})
+ -- Most likely case first.
+ elseif name:sub(1, 13) == "default:grass" then
+ minetest.set_node(pos, {name = "default:dirt_with_grass"})
+ elseif name:sub(1, 17) == "default:dry_grass" then
+ minetest.set_node(pos, {name = "default:dirt_with_dry_grass"})
+ end
end
})
-
--
-- Grass and dry grass removed in darkness
--