From 4876fc12658b3159d0770dc5030bd673ed162491 Mon Sep 17 00:00:00 2001
From: Vanessa Dannenberg <vanessa.e.dannenberg@gmail.com>
Date: Tue, 6 Apr 2021 04:04:08 -0400
Subject: [PATCH] let biome_lib place pebbles instead of using custom mapgen
 code

---
 cavestuff/init.lua   |  2 ++
 cavestuff/mapgen.lua | 77 ++++++++++++++++----------------------------
 cavestuff/mod.conf   |  2 +-
 3 files changed, 31 insertions(+), 50 deletions(-)

diff --git a/cavestuff/init.lua b/cavestuff/init.lua
index e3dba36..3f46ea9 100644
--- a/cavestuff/init.lua
+++ b/cavestuff/init.lua
@@ -7,6 +7,8 @@ local mname		= "cavestuff"
 -- support for i18n
 local S = minetest.get_translator("cavestuff")
 
+cavestuff = {}
+
 dofile(minetest.get_modpath("cavestuff").."/nodes.lua")
 dofile(minetest.get_modpath("cavestuff").."/mapgen.lua")
 
diff --git a/cavestuff/mapgen.lua b/cavestuff/mapgen.lua
index 3be9f31..97917e4 100644
--- a/cavestuff/mapgen.lua
+++ b/cavestuff/mapgen.lua
@@ -1,52 +1,31 @@
 --Map Generation Stuff
 
-minetest.register_on_generated(function(minp, maxp, seed)
-	if maxp.y >= 2 and minp.y <= 0 then
-		-- Generate pebbles
-		local perlin1 = minetest.get_perlin(329, 3, 0.6, 100)
-		-- Assume X and Z lengths are equal
-		local divlen = 16
-		local divs = (maxp.x-minp.x)/divlen+1;
-		for divx=0,divs-1 do
-		for divz=0,divs-1 do
-			local x0 = minp.x + math.floor((divx+0)*divlen)
-			local z0 = minp.z + math.floor((divz+0)*divlen)
-			local x1 = minp.x + math.floor((divx+1)*divlen)
-			local z1 = minp.z + math.floor((divz+1)*divlen)
-			-- Determine pebble amount from perlin noise
-			local pebble_amount = math.floor(perlin1:get2d({x=x0, y=z0}) ^ 2 * 2)
-			-- Find random positions for pebbles based on this random
-			local pr = PseudoRandom(seed+1)
-			for i=0,pebble_amount do
-				local x = pr:next(x0, x1)
-				local z = pr:next(z0, z1)
-				-- Find ground level (0...15)
-				local ground_y = nil
-				for y=30,0,-1 do
-					if minetest.get_node({x=x,y=y,z=z}).name ~= "air" then
-						ground_y = y
-						break
-					end
-				end
+biome_lib:register_generate_plant(
+	{
+		surface = { "default:dirt_with_grass" },
+		max_count = 50,
+		rarity = 0,
+		plantlife_limit = -1,
+		check_air = true,
+		random_facedir = {0, 3}
+	},
+	{
+		"cavestuff:pebble_1",
+		"cavestuff:pebble_2"
+	}
+)
 
-				if ground_y then
-					local p = {x=x,y=ground_y+1,z=z}
-					local nn = minetest.get_node(p).name
-					-- Check if the node can be replaced
-					if minetest.registered_nodes[nn] and
-						minetest.registered_nodes[nn].buildable_to then
-						nn = minetest.get_node({x=x,y=ground_y,z=z}).name
-						-- If desert sand, add dry shrub
-						if nn == "default:dirt_with_grass" then
-							minetest.swap_node(p,{name="cavestuff:pebble_"..pr:next(1,2), param2=math.random(0,3)})
-						elseif nn == "default:desert_sand" then
-							minetest.swap_node(p,{name="cavestuff:desert_pebble_"..pr:next(1,2), param2=math.random(0,3)})
-					    end
-					end
-				end
-
-			end
-		end
-		end
-	end
-end)
+biome_lib:register_generate_plant(
+	{
+		surface = { "default:desert_sand" },
+		max_count = 50,
+		rarity = 0,
+		plantlife_limit = -1,
+		check_air = true,
+		random_facedir = {0, 3}
+	},
+	{
+		"cavestuff:desert_pebble_1",
+		"cavestuff:desert_pebble_2"
+	}
+)
diff --git a/cavestuff/mod.conf b/cavestuff/mod.conf
index b021c9e..55cdcab 100644
--- a/cavestuff/mod.conf
+++ b/cavestuff/mod.conf
@@ -1,2 +1,2 @@
 name = cavestuff
-depends = default
+depends = default,biome_lib