darkage/mapgen.lua
2016-07-01 13:41:40 +02:00

272 lines
8.3 KiB
Lua

--Makes a stratus of rocks
--name of the rock to generate
--wherein kind of node to replace, for example default:stone
--minp, maxp the corners of the map to be generated
--seed random seed
--stratus_chance inverse probability in a given radius 1:2, 1:3 etc
--radius horizontal radius of the stratus
--radius_y vertical radius of the stratus
--deep how deep can be from the ground
local function generate_stratus(name, wherein, ceilin, ceil, minp, maxp, seed, stratus_chance, radius, radius_y, deep, height_min, height_max)
if maxp.y < height_min or minp.y > height_max then
return
end
-- it will be only generate a stratus for every 100 m of area
local stratus_per_volume=1
local area=45
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)/area)*((y_max-y_min+1)/area)*((maxp.z-minp.z+1)/area)
local pr = PseudoRandom(seed)
local blocks = math.floor(stratus_per_volume*volume)
minetest.log("info"," <<"..dump(name)..">>");
if blocks == 0 then
blocks = 1
end
minetest.log("info"," blocks: "..dump(blocks).." in vol: "..dump(volume).." ("..dump(maxp.x-minp.x+1)..","..dump(y_max-y_min+1)..","..dump(maxp.z-minp.z+1)..")")
for i=1,blocks do
local x = pr:next(1,stratus_chance)
if x == 1 then
-- TODO deep
local y0=y_max-radius_y+1
if y0 < y_min then
y0=y_min
else
y0=pr:next(y_min, y0)
end
local x0 = maxp.x-radius+1
if x0 < minp.x then
x0 = minp.x
else
x0 = pr:next(minp.x, x0)
end
local z0 = maxp.z-radius+1
if z0 < minp.z then
x0 = minp.z
else
z0 = pr:next(minp.z, z0)
end
local p0 = {x=x0, y=y0, z=z0}
local n = minetest.env:get_node(p0).name
local i = 0
--minetest.log("info"," upper node "..n)
x = 0
for k, v in ipairs(ceilin) do
if n == v then
x = 1
break
end
end
if x == 1 then
-- search for the node to replace
--minetest.log("info"," Searching nodes to replace from "..dump(y0-1).." to "..dump(y_min))
for y1=y0-1,y_min,-1 do
p0.y=y1
n = minetest.env:get_node(p0).name
x = 0
for k, v in ipairs(wherein) do
if n == v then
x = 1
break
end
end
if x == 1 then
y0=y1-deep
if y0 < y_min then
y0 = y_min
end
break
end
end
local rx=pr:next(radius/2,radius)+1
local rz=pr:next(radius/2,radius)+1
local ry=pr:next(radius_y/2,radius_y)+1
--minetest.log("info"," area of generation ("..dump(rx)..","..dump(rz)..","..dump(ry)..")")
for x1=0,rx do
rz = rz + 3 - pr:next(1,6)
if rz < 1 then
rz = 1
end
for z1=pr:next(1,3),rz do
local ry0=ry+ pr:next(1,3)
for y1=pr:next(1,3),ry0 do
local x2 = x0+x1
local y2 = y0+y1
local z2 = z0+z1
local p2 = {x=x2, y=y2, z=z2}
n = minetest.env:get_node(p2).name
x = 0
for k, v in ipairs(wherein) do
if n == v then
x = 1
break
end
end
if x == 1 then
if ceil == nil then
minetest.env:set_node(p2, {name=name})
i = i +1
else
local p3 = {p2.x,p2.y+1,p2}
if minetest.env:get_node(p3).name == ceil then
minetest.env:set_node(p2, {name=name})
i = i +1
end
end
end
end
end
end
minetest.log("info"," generated "..dump(i).." blocks in ("..dump(x0)..","..dump(y0)..","..dump(z0)..")")
end
end
end
--minetest.log("info","generate_ore done")
end
local function generate_claylike(data, varea, name, minp, maxp, seed, chance, minh, maxh, dirt)
local c_ore = minetest.get_content_id(name)
local c_sand = minetest.get_content_id("default:sand")
local c_dirt = minetest.get_content_id("default:dirt")
local c_lawn = minetest.get_content_id("default:dirt_with_grass")
local c_water = minetest.get_content_id("default:water_source")
local c_air = minetest.get_content_id("air")
if maxp.y >= maxh+1 and minp.y <= minh-1 then
local pr = PseudoRandom(seed)
local divlen = 4
local divs = (maxp.x-minp.x)/divlen+1;
for yy=minh,maxh do
local x = pr:next(1,chance)
if x == 1 then
for divx=0+1,divs-1-1 do
for divz=0+1,divs-1-1 do
local cx = minp.x + math.floor((divx+0.5)*divlen)
local cz = minp.z + math.floor((divz+0.5)*divlen)
local up = data[varea:index(cx,yy,cz)]
local down = data[varea:index(cx,yy-1,cz)]
if ( up == c_water or up == c_air ) and ( down == c_sand or (dirt == 1 and (down == c_dirt or down == c_lawn ))) then
local is_shallow = true
local num_water_around = 0
if data[varea:index(cx-divlen*2,yy,cz)] == c_water then
num_water_around = num_water_around + 1
end
if data[varea:index(cx+divlen*2,yy,cz)] == c_water then
num_water_around = num_water_around + 1
end
if data[varea:index(cx,yy,cz-divlen*2)] == c_water then
num_water_around = num_water_around + 1
end
if data[varea:index(cx,yy,cz+divlen*2)] == c_water then
num_water_around = num_water_around + 1
end
if num_water_around >= 3 then
is_shallow = false
end
if is_shallow then
for x1=-divlen,divlen do
for z1=-divlen,divlen do
local p={x=cx+x1,y=yy-1,z=cz+z1}
down = data[varea:indexp(p)]
if down == c_sand or (dirt == 1 and (down == c_dirt or down == c_lawn)) then
data[varea:indexp(p)] = c_ore
end
end
end
end
end
end
end
end
end
end
end
-- Generate desert stone with iron in derset.
minetest.register_ore({
ore_type = "scatter",
ore = "darkage:desert_stone_with_iron",
wherein = "default:desert_stone",
clust_scarcity = 12 * 12 * 12,
clust_num_ores = 3,
clust_size = 2,
y_min = -1,
y_max = 200,
})
-- Generate chalk inside mountains
minetest.register_ore({
ore_type = "sheet",
ore = "darkage:chalk",
wherein = {"default:stone"},
column_height_max = 30,
column_height_min = 20,
y_min = -20,
y_max = 50,
noise_threshold = 0.45,
noise_params = {
offset = 0.35,
scale = 0.2,
spread = {x = 30, y = 30, z = 30},
octaves = 1,
persistence = 0.6
},
})
local function generate_clay(minp, maxp, seed)
local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
local area = VoxelArea:new({MinEdge = emin, MaxEdge = emax})
local data = vm:get_data()
generate_claylike(data, area, "darkage:mud", minp, maxp, seed+1, 4, 0, 2, 0)
generate_claylike(data, area, "darkage:silt", minp, maxp, seed+2, 4, -1, 1, 1)
vm:set_data(data)
vm:write_to_map()
end
minetest.register_on_generated(generate_clay)
-- TODO: Realize the following stuff with register ore. somehow.
minetest.register_on_generated(function(minp, maxp, seed)
-- Generate stratus
local t1 = os.clock()
minetest.log("info","DARKAGE: Generate stratus");
generate_stratus("darkage:ors",
{"default:stone"},
{"default:stone","air","default:water_source"}, nil,
minp, maxp, seed+4, 4, 25, 7, 50, -200, 500)
generate_stratus("darkage:shale",
{"default:stone"},
{"default:stone","air"}, nil,
minp, maxp, seed+5, 4, 23, 7, 50, -50, 20)
generate_stratus("darkage:slate",
{"default:stone"},
{"default:stone","air"}, nil,
minp, maxp, seed+6, 6, 23, 5, 50, -500, 0)
generate_stratus("darkage:schist",
{"default:stone"},
{"default:stone","air"}, nil,
minp, maxp, seed+7, 6, 19, 6, 50, -31000, -10)
generate_stratus("darkage:basalt",
{"default:stone"},
{"default:stone","air"}, nil,
minp, maxp, seed+8, 5, 20, 5, 20, -31000, -50)
generate_stratus("darkage:marble",
{"default:stone"},
{"default:stone","air"}, nil,
minp, maxp, seed+9, 4, 25, 6, 50, -31000, -75)
generate_stratus("darkage:serpentine",
{"default:stone"},
{"default:stone","air"}, nil,
minp, maxp, seed+10, 4, 28, 8, 50, -31000, -350)
generate_stratus("darkage:gneiss",
{"default:stone"},
{"default:stone","air"}, nil,
minp, maxp, seed+11, 4, 15, 5, 50, -31000, -250)
minetest.log("info", string.format("[darkage] finished after: %.2fs", os.clock() - t1))
end)