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paramat wrote:You can actually stop caves removing particular nodes (in MGV6 and MGV7) by adding:
is _ground_content = false
paramat wrote:If i wrote a mapgen with a biome API that out-performed MGV7 it would be too slow for most people.
data[vi] = c_n23destone local c_sandstone = minetest.get_content_id("default:sandstone")data[vi] = c_sandstone local c_dirt = minetest.get_content_id("default:dirt") -- *
local c_grass = minetest.get_content_id("default:dirt_with_grass") -- *
local sidelen = x1 - x0 + 1
local chulens = {x=sidelen, y=sidelen, z=sidelen}
local minposxyz = {x=x0, y=y0, z=z0}
local minposxz = {x=x0, y=z0}
local nvals_terrain = minetest.get_perlin_map(np_terrain, chulens):get3dMap_flat(minposxyz)
local nvals_biome = minetest.get_perlin_map(np_biome, chulens):get2dMap_flat(minposxz)
local nixyz = 1 -- 3D noise index
local nixz = 1 -- 2D noise index
local stable = {}
local under = {} -- *
for z = z0, z1 do
for x = x0, x1 do
local si = x - x0 + 1
under[si] = 0 -- *
local nodename = minetest.get_node({x=x,y=y0-1,z=z}).name
if nodename == "air"
or nodename == "default:water_source" then
stable[si] = 0
else
stable[si] = STABLE
end
end
for y = y0, y1 do
local vi = area:index(x0, y, z)
local viu = area:index(x0, y-1, z) -- *
for x = x0, x1 do
local si = x - x0 + 1
local grad = (TERCEN - y) / TERSCA
local density = nvals_terrain[nixyz] + grad
local n_biome = nvals_biome[nixz] -- biome noise for node
local biome = false -- set biome id to undefined
if n_biome > 0.46 + math.random() * 0.04 then -- set biome id
biome = 3
elseif n_biome < -0.5 + math.random() * 0.04 then
biome = 1
else
biome = 2
end
if density >= TSTONE then
if biome == 3 then
data[vi] = c_n23destone
else -- biomes 1 and 2
data[vi] = c_n23stone
end
stable[si] = stable[si] + 1
under[si] = 0 -- *
elseif density >= 0 and density < TSTONE and stable[si] >= 2 then
if y <= YWATER + 3 then
data[vi] = c_sand
under[si] = 0 -- *
elseif biome == 3 then
data[vi] = c_desand
under[si] = 3 -- *
elseif biome == 1 then
data[vi] = c_flosand
under[si] = 1 -- *
else -- biome = 2
data[vi] = c_dirt -- *
under[si] = 2 -- *
end
elseif y <= YWATER then
if biome == 1 and y >= YWATER - 3 then
data[vi] = c_ice
else -- biomes 2 and 3
data[vi] = c_water
end
stable[si] = 0
under[si] = 0 -- *
elseif density < 0 and under[si] ~= 0 then -- *
if under[si] = 2 then -- *
data[viu] = c_grass -- *
end -- *
under[si] = 0 -- *
else
data[vi] = c_air
stable[si] = 0
under[si] = 0 -- *
end
nixyz = nixyz + 1 -- increment 3D noise index
nixz = nixz + 1 -- increment 2D noise index
vi = vi + 1
viu = viu + 1 -- *
end
nixz = nixz - 80 -- rewind 2D noise index by 80 nodes for next x row above
end
nixz = nixz + 80 -- fast-forward 2D noise index by 80 nodes for next northward xy plane
endparamat wrote:Does that code work?
for z = z0, z1 do -- for each xy plane progressing northwards
for x = x0, x1 do
local si = x - x0 + 1
local nodename = minetest.get_node({x=x,y=y0-1,z=z}).name
if nodename == "air"
or nodename == "default:water_source" then
stable[si] = 0
else
stable[si] = STABLE
end
end
local si = x - x0 + 1
local nodename = minetest.get_node({x=x,y=y0-1,z=z}).name
if nodename == "air"
or nodename == "ignore"
or nodename == "default:water_source" then
stable[si] = 0
else
stable[si] = STABLE
end
local si = x - x0 + 1
local nodename = minetest.get_node({x=x,y=y0-1,z=z}).name
if nodename == "ignore"
or minetest.registered_nodes[nodename].walkable == false then
stable[si] = 0
else
stable[si] = STABLE
end
local chulay = math.floor((minp.y + 32) / 80) -- chunk layer number, 0 = surface chunk
local tercen = (math.floor(chulay / CHUINT) * CHUINT + CHUINT / 2) * 80 - 32 -- terrain centre of this realm layer
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