Mapgen Version 7 Trees

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jordan4ibanez
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Mapgen Version 7 Trees

by jordan4ibanez » Post

I really like the speed of version 7 mapgen, but there are no trees so it's a little boring. Here is a simple method to bring trees to Version 7, which is built off of Pilzadam's fantastic Farming_Plus mod:

Code: Select all

--Grow Tree
minetest.register_on_generated(function(minp, maxp, seed)
        if maxp.y <= 150 or minp.y >= 0 then
                -- Generate plants (code from flowers)
                local perlin1 = minetest.get_perlin(974, 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 flowers amount from perlin noise
							local grass_amount = math.floor(perlin1:get2d({x=x0, y=z0}) ^ 3 * 9)
							-- Find random positions for flowers based on this random
							local pr = PseudoRandom(seed+456)
							for i=0,grass_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
									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 nn == "default:dirt_with_grass" then
														local possibilities = {true,false}
														local is_apple_tree = possibilities[math.random(1,2)]
														default.grow_tree(p, is_apple_tree)	
													end
											end
									end
							end
					end
                end
        end
end)

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rubenwardy
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Re: Mapgen Version 7 Trees

by rubenwardy » Post

It has no trees because they are not defined. You need a Mapgenv7 mod. minetest_game doesn't fully support MapgenV7 yet, so doesn't define biomes or decorations.

Trees are placed using decorations.

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