Alternative fast-generating

mapgen.lua

@@ -2,41 +2,42 @@ function make_bamboo(pos, size)
 	for y=0,size-1 do
 		local p = {x=pos.x, y=pos.y+y, z=pos.z}
 		local nn = minetest.get_node(p).name
-		if minetest.registered_nodes[nn] and
-			minetest.registered_nodes[nn].buildable_to then
+		if nn == "air" then
 			minetest.set_node(p, {name="bamboo:bamboo"})
-		else
+		elseif (nn == "default:dirt" or nn == "default:dirt_with_grass") then
 			return
+		else
+			break
 		end
 	end
 end
 
 minetest.register_on_generated(function(minp, maxp, seed)
-	if maxp.y >= 2 and minp.y <= 0 then
-		-- Generate Bamboo
-		local perlin1 = minetest.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 bamboo amount from perlin noise
-			local bamboo_amount = math.floor(perlin1:get2d({x=x0, y=z0}) * 45 - 20)
-			-- Find random positions for Bamboo based on this random
-			local pr = PseudoRandom(seed+1)
-			for i=0,bamboo_amount do
-				local x = pr:next(x0, x1)
-				local z = pr:next(z0, z1)
-				if minetest.get_node({x=x,y=1,z=z}).name == "default:dirt_with_grass" and
-						minetest.find_node_near({x=x,y=1,z=z}, 1, "default:water_source") then
-					make_bamboo({x=x,y=2,z=z}, pr:next(2, 4))
-				end
+	if(minp.y < -35 or maxp.y > 50) then
+		return
+	end
+	if(math.random(1,8) ~= 2) then
+		-- Making rare...
+		return
+	end
+	local stop = false
+	for px=2,maxp.x-minp.x-2 do
+	for pz=2,maxp.z-minp.z-2 do
+		local cpos = {x=minp.x+px,y=1,z=minp.z+pz}
+		local cname = minetest.get_node(cpos).name
+		if(cname == "default:desert_sand") then
+			-- AAH! Too hot!
+			stop = true
+			break
+		end
+		if(cname == "default:dirt_with_grass" and math.random(1,15) == 2) then
+			if minetest.find_node_near(cpos, 2, "default:water_source") then
+				make_bamboo({x=minp.x+px,y=2,z=minp.z+pz}, math.random(3, 6))
 			end
 		end
+	end
+		if(stop) then
+			break
 		end
 	end
 end)