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Re-implement nyancat generation in Lua (they don't occur in the exact same spots, though)

This commit is contained in:
Perttu Ahola 2012-05-20 15:30:27 +03:00
parent 216227bac3
commit 53e9b0e107
1 changed files with 51 additions and 0 deletions
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51
mods/default/mapgen.lua
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@ -80,6 +80,54 @@ function default.make_cactus(pos, size)
end
end
-- facedir: 0/1/2/3 (head node facedir value)
-- length: length of rainbow tail
function default.make_nyancat(pos, facedir, length)
local tailvec = {x=0, y=0, z=0}
if facedir == 0 then
tailvec.z = 1
elseif facedir == 1 then
tailvec.x = 1
elseif facedir == 2 then
tailvec.z = -1
elseif facedir == 3 then
tailvec.x = -1
else
print("default.make_nyancat(): Invalid facedir: "+dump(facedir))
facedir = 0
tailvec.z = 1
end
local p = {x=pos.x, y=pos.y, z=pos.z}
minetest.env:set_node(p, {name="default:nyancat", param2=facedir})
for i=1,length do
p.x = p.x + tailvec.x
p.z = p.z + tailvec.z
minetest.env:set_node(p, {name="default:nyancat_rainbow"})
end
end
function generate_nyancats(seed, minp, maxp)
local height_min = -31000
local height_max = -32
if maxp.y < height_min or minp.y > height_max then
return
end
local y_min = math.max(minp.y, height_min)
local y_max = math.min(maxp.y, height_max)
local volume = (maxp.x-minp.x+1)*(y_max-y_min+1)*(maxp.z-minp.z+1)
local pr = PseudoRandom(seed + 9324342)
local max_num_nyancats = math.floor(volume / (16*16*16))
for i=1,max_num_nyancats do
if pr.next(0, 1000) == 0 then
local x0 = pr:next(minp.x, maxp.x)
local y0 = pr:next(minp.y, maxp.y)
local z0 = pr:next(minp.z, maxp.z)
local p0 = {x=x0, y=y0, z=z0}
default.make_nyancat(p0, pr:next(0,3), pr:next(3,15))
end
end
end
minetest.register_on_generated(function(minp, maxp, seed)
-- Generate regular ores
generate_ore("default:stone_with_coal", "default:stone", minp, maxp, seed+0, 1/8/8/8, 3, 8, -31000, 64)
@ -220,5 +268,8 @@ minetest.register_on_generated(function(minp, maxp, seed)
end
end
end
-- Generate nyan cats
generate_nyancats(seed, minp, maxp)
end)