forked from mtcontrib/riesenpilz
306 lines
8.1 KiB
Lua
306 lines
8.1 KiB
Lua
local minetest = minetest --Should make things a bit faster.
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local c
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local function define_contents()
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c = {
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ignore = minetest.get_content_id("ignore"),
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air = minetest.get_content_id("air"),
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water = minetest.get_content_id("default:water_source"),
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stone = minetest.get_content_id("default:stone"),
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dirt = minetest.get_content_id("default:dirt"),
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desert_sand = minetest.get_content_id("default:desert_sand"),
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dry_shrub = minetest.get_content_id("default:dry_shrub"),
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ground = minetest.get_content_id("riesenpilz:ground"),
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riesenpilz_brown = minetest.get_content_id("riesenpilz:brown"),
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riesenpilz_red = minetest.get_content_id("riesenpilz:red"),
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riesenpilz_fly_agaric = minetest.get_content_id("riesenpilz:fly_agaric"),
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riesenpilz_lavashroom = minetest.get_content_id("riesenpilz:lavashroom"),
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riesenpilz_glowshroom = minetest.get_content_id("riesenpilz:glowshroom"),
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riesenpilz_parasol = minetest.get_content_id("riesenpilz:parasol"),
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TREE_STUFF = {
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minetest.get_content_id("default:tree"),
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minetest.get_content_id("default:leaves"),
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minetest.get_content_id("default:apple"),
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minetest.get_content_id("default:jungletree"),
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minetest.get_content_id("default:jungleleaves"),
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minetest.get_content_id("default:junglegrass"),
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},
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USUAL_STUFF = {
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[minetest.get_content_id("default:cactus")] = true,
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[minetest.get_content_id("default:papyrus")] = true
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},
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}
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end
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local grounds = {}
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function is_ground(id)
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local is = grounds[id]
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if is ~= nil then
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return is
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end
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local data = minetest.registered_nodes[minetest.get_name_from_content_id(id)]
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if not data
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or data.paramtype == "light" then
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grounds[id] = false
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return false
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end
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local groups = data.groups
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if groups
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and (groups.crumbly == 3 or groups.soil == 1) then
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grounds[id] = true
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return true
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end
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grounds[id] = false
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return false
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end
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local data, area, pr
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function riesenpilz_circle(nam, pos, radius, chance)
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local circle = vector.circle(radius)
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for i = 1,#circle do
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if pr:next(1, chance) == 1 then
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local vi = area:indexp(vector.add(pos, circle[i]))
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if data[vi] == c.air
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and is_ground(data[vi - area.ystride]) then
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data[vi] = nam
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end
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end
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end
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end
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-- perlin noise "hills" are not peaks but looking like sinus curve
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local function upper_rarity(rarity)
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return math.sign(rarity)*math.sin(math.abs(rarity)*math.pi/2)
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end
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local rarity = riesenpilz.mapgen_rarity
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local riesenpilz_size = riesenpilz.mapgen_size
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local nosmooth_rarity = 1-rarity/50
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local perlin_scale = riesenpilz_size*100/rarity
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local smooth_rarity_max, smooth_rarity_min, smooth_rarity_dif
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local smooth = riesenpilz.smooth
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if smooth then
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local smooth_trans_size = riesenpilz.smooth_trans_size
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smooth_rarity_max = upper_rarity(nosmooth_rarity+smooth_trans_size*2/perlin_scale)
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smooth_rarity_min = upper_rarity(nosmooth_rarity-smooth_trans_size/perlin_scale)
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smooth_rarity_dif = smooth_rarity_max-smooth_rarity_min
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end
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nosmooth_rarity = upper_rarity(nosmooth_rarity)
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--local USUAL_STUFF = {"default:leaves","default:apple","default:tree","default:cactus","default:papyrus"}
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local contents_defined
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minetest.register_on_generated(function(minp, maxp, seed)
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if maxp.y <= 0
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or minp.y >= 150 then --avoid generation in the sky
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return
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end
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local x0,z0,x1,z1 = minp.x,minp.z,maxp.x,maxp.z -- Assume X and Z lengths are equal
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local perlin1 = minetest.get_perlin(51,3, 0.5, perlin_scale) --Get map specific perlin
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if not riesenpilz.always_generate then
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local biome_allowed
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for x = x0, x1, 16 do
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for z = z0, z1, 16 do
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if perlin1:get2d({x=x, y=z}) > nosmooth_rarity then
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biome_allowed = true
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break
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end
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end
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if biome_allowed then
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break
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end
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end
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if not biome_allowed then
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return
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end
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end
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local t1 = os.clock()
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riesenpilz.inform("tries to generate a giant mushroom biome at: x=["..minp.x.."; "..maxp.x.."]; y=["..minp.y.."; "..maxp.y.."]; z=["..minp.z.."; "..maxp.z.."]", 2)
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if not contents_defined then
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define_contents()
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contents_defined = true
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end
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local divs = (maxp.x-minp.x);
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local num = 1
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local tab = {}
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pr = PseudoRandom(seed+68)
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local heightmap = minetest.get_mapgen_object("heightmap")
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local hmi = 1
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local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
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data = vm:get_data()
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area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
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for p_pos in area:iterp(minp, maxp) do --remove tree stuff
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local d_p_pos = data[p_pos]
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for _,nam in ipairs(c.TREE_STUFF) do
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if d_p_pos == nam then
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data[p_pos] = c.air
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break
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end
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end
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end
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for j=0,divs do
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for i=0,divs do
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local x,z = x0+i,z0+j
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--Check if we are in a "riesenpilz biome"
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local in_biome = false
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local test = perlin1:get2d({x=x, y=z})
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--smooth mapgen
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if riesenpilz.always_generate then
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in_biome = true
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elseif smooth then
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if test >= smooth_rarity_max
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or (
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test > smooth_rarity_min
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and pr:next(1, 1000) <= ((test-smooth_rarity_min)/smooth_rarity_dif)*1000
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) then
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in_biome = true
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end
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elseif test > nosmooth_rarity then
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in_biome = true
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end
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if in_biome then
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local ymin = math.max(heightmap[hmi]-5, minp.y)
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local ymax = math.min(heightmap[hmi]+20, maxp.y)
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-- skip the air part
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local ground
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local vi = area:index(x, ymax, z)
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for y = ymax, ymin, -1 do
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if data[vi] ~= c.air then
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ground = y
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break
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end
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vi = vi - area.ystride
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end
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local ground_y
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if ground then
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for y = ground, ymin, -1 do
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local d_p_pos = data[vi]
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if c.USUAL_STUFF[d_p_pos] then
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-- remove trees etc.
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data[vi] = c.air
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else
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if is_ground(d_p_pos) then
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ground_y = y
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end
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break
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end
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vi = vi - area.ystride
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end
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end
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if ground_y then
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-- add ground and dirt below if needed
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data[vi] = c.ground
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for i = -1,-5,-1 do
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local p_pos = vi + i * area.ystride
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if not is_ground(data[p_pos])
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or data[p_pos] == c.dirt then
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break
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end
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data[p_pos] = c.dirt
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end
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local bigtype
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local boden = {x=x,y=ground_y+1,z=z}
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if pr:next(1,15) == 1 then
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data[vi + area.ystride] = c.dry_shrub
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elseif pr:next(1,80) == 1 then
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riesenpilz_circle(c.riesenpilz_brown, boden, pr:next(3,4), 3)
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elseif pr:next(1,85) == 1 then
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riesenpilz_circle(c.riesenpilz_parasol, boden, pr:next(3,5), 3)
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elseif pr:next(1,90) == 1 then
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riesenpilz_circle(c.riesenpilz_red, boden, pr:next(4,5), 3)
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elseif pr:next(1,100) == 1 then
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riesenpilz_circle(c.riesenpilz_fly_agaric, boden, 4, 3)
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elseif pr:next(1,340) == 10 then
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bigtype = 2
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elseif pr:next(1,380) == 1 then
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bigtype = 1
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elseif pr:next(1,390) == 20 then
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bigtype = 3
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elseif pr:next(1,800) == 7 then
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bigtype = 5
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elseif pr:next(1,4000) == 1 then
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riesenpilz_circle(c.riesenpilz_lavashroom, boden, pr:next(5,6), 3)
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elseif pr:next(1,5000) == 1 then
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riesenpilz_circle(c.riesenpilz_glowshroom, boden, 3, 3)
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elseif pr:next(1,6000) == 2 then
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if pr:next(1,200) == 15 then
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bigtype = 4
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elseif pr:next(1,2000) == 54 then
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bigtype = 6
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end
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end
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if bigtype then
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tab[num] = {bigtype, boden}
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num = num+1
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end
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end
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end
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hmi = hmi+1
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end
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end
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riesenpilz.inform("ground finished", 2, t1)
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local param2s
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if num ~= 1 then
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local t2 = os.clock()
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for _,v in pairs(tab) do
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local p = v[2]
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local m = v[1]
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if m == 1 then
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riesenpilz.red(p, data, area)
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elseif m == 2 then
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riesenpilz.brown(p, data, area)
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elseif m == 3 then
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if not param2s then
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param2s = vm:get_param2_data()
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end
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riesenpilz.fly_agaric(p, data, area, param2s)
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elseif m == 4 then
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riesenpilz.lavashroom(p, data, area)
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elseif m == 5 then
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riesenpilz.parasol(p, data, area)
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elseif m == 6 then
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riesenpilz.red45(p, data, area)
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end
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end
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riesenpilz.inform("giant shrooms generated", 2, t2)
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end
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local t2 = os.clock()
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vm:set_data(data)
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if param2s then
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vm:set_param2_data(param2s)
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end
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vm:set_lighting({day=0, night=0})
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vm:calc_lighting()
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vm:write_to_map()
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data = nil
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area = nil
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riesenpilz.inform("data set", 2, t2)
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riesenpilz.inform("done", 1, t1)
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end)
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