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Generate dry shrubs on deserts

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This commit is contained in:
Perttu Ahola 2012-04-08 00:09:42 +03:00
parent 51fce37fc1
commit 5296dc1518
3 changed files with 50 additions and 0 deletions
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33
mods/default/mapgen.lua
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@ -183,6 +183,39 @@ minetest.register_on_generated(function(minp, maxp, seed)
end
end
end
-- Generate dry shrubs
local perlin1 = minetest.env: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 cactus amount from perlin noise
local cactus_amount = math.floor(perlin1:get2d({x=x0, y=z0}) * 5 + 2)
-- Find random positions for cactus based on this random
local pr = PseudoRandom(seed+1)
for i=0,cactus_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.env:get_node({x=x,y=y,z=z}).name ~= "air" then
ground_y = y
break
end
end
-- If desert sand, make cactus
if ground_y and minetest.env:get_node({x=x,y=ground_y,z=z}).name == "default:desert_sand" then
minetest.env:set_node({x=x,y=ground_y+1,z=z}, {name="default:dry_shrub"})
end
end
end
end
end
end)