From: Perttu Ahola <celeron55@gmail.com>
Date: Sat, 7 Apr 2012 11:09:07 +0000 (+0300)
Subject: papyrus generation
X-Git-Tag: 0.4.dev-20120408~9
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=5f6039bc3c820d823a13e9f4925efc96b645337a;p=oweals%2Fminetest_game.git

papyrus generation
---

diff --git a/mods/default/mapgen.lua b/mods/default/mapgen.lua
index af94505a..c6e7d24e 100644
--- a/mods/default/mapgen.lua
+++ b/mods/default/mapgen.lua
@@ -68,13 +68,20 @@ local function generate_ore(name, wherein, minp, maxp, seed, chunks_per_volume,
 	--print("generate_ore done")
 end
 
+local function make_papyrus(pos, size)
+	for y=0,size-1 do
+		local p = {x=pos.x, y=pos.y+y, z=pos.z}
+		minetest.env:set_node(p, {name="default:papyrus"})
+	end
+end
+
 minetest.register_on_generated(function(minp, maxp, seed)
 	generate_ore("default:stone_with_coal", "default:stone", minp, maxp, seed,   1/8/8/8,    5, -31000,  64)
 	generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+1, 1/16/16/16, 5,   -5,   7)
 	generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+2, 1/12/12/12, 5, -16,   -5)
 	generate_ore("default:stone_with_iron", "default:stone", minp, maxp, seed+3, 1/9/9/9,    5, -31000, -17)
-	-- Generate clay
 	if maxp.y >= 2 and minp.y <= 0 then
+		-- Generate clay
 		-- Assume X and Z lengths are equal
 		local divlen = 4
 		local divs = (maxp.x-minp.x)/divlen+1;
@@ -109,6 +116,31 @@ minetest.register_on_generated(function(minp, maxp, seed)
 			end
 		end
 		end
+		-- Generate papyrus
+		local perlin1 = minetest.env:get_perlin(354, 3, 0.7, 100)
+		-- Assume X and Z lengths are equal
+		local divlen = 8
+		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 papyrus amount from perlin noise
+			local papyrus_amount = math.floor(perlin1:get2d({x=x0, y=z0}) * 45 - 20)
+			-- Find random positions for papyrus based on this random
+			local pr = PseudoRandom(seed+1)
+			for i=0,papyrus_amount do
+				local x = pr:next(x0, x1)
+				local z = pr:next(z0, z1)
+				if minetest.env:get_node({x=x,y=1,z=z}).name == "default:dirt_with_grass" and
+						minetest.env:find_node_near({x=x,y=1,z=z}, 1, "default:water_source") then
+					make_papyrus({x=x,y=2,z=z}, pr:next(2, 4))
+				end
+			end
+		end
+		end
 	end
 end)