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Copyright (C) 2004 Sam Hocevar <sam@hocevar.net>
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Copyright (C) 2022 MisterE
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MIT LICENSE
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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this software and associated documentation files (the "Software"), to deal in
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the Software without restriction, including without limitation the rights to
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use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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the Software, and to permit persons to whom the Software is furnished to do so,
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subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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-- forces the map into singlenode mode
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luamap.set_singlenode()
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-- creates a terrain noise
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luamap.register_noise("terrain",{
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type = "2d",
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np_vals = {
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offset = 0,
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scale = 1,
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spread = {x=384, y=256, z=384},
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seed = 5900033,
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octaves = 5,
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persist = 0.63,
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lacunarity = 2.0,
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flags = ""
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},
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})
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local c_stone = minetest.get_content_id("default:stone")
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local c_water = minetest.get_content_id("default:water_source")
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local water_level = 0
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local old_logic = luamap.logic
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function luamap.logic(noise_vals,x,y,z,seed)
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-- get any terrain defined in another mod
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local content = old_logic(noise_vals,x,y,z,seed)
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if y < water_level then
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content = c_water
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end
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if y < noise_vals.terrain * 50 then
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content = c_stone
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end
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return content
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end
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luamap = {}
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luamap.noises = {}
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function luamap.remap(val, min_val, max_val, min_map, max_map)
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return (val-min_val)/(max_val-min_val) * (max_map-min_map) + min_map
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end
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function luamap.lerp(var_a, var_b, ratio)
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return (1-ratio)*var_a + (ratio*var_b)
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end
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function luamap.register_noise(name,data)
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luamap.noises[name] = {}
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luamap.noises[name].np_vals = data.np_vals
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luamap.noises[name].nobj = nil
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luamap.noises[name].type = data.type or "2d"
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end
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local c_air = minetest.get_content_id("air")
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-- override this function
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function luamap.logic(noise_vals,x,y,z,seed)
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return c_air
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end
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-- override this function
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function luamap.precalc(data, area, vm, minp, maxp, seed)
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return
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end
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-- Set mapgen parameters
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function luamap.set_singlenode()
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minetest.register_on_mapgen_init(function(mgparams)
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minetest.set_mapgen_params({mgname="singlenode"})
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end)
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end
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minetest.register_on_generated(function(minp, maxp, seed)
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-- local t0 = os.clock()
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local x1 = maxp.x
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local y1 = maxp.y
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local z1 = maxp.z
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local x0 = minp.x
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local y0 = minp.y
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local z0 = minp.z
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local vm, emin, emax = minetest.get_mapgen_object("voxelmanip")
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local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
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local data = vm:get_data()
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local sidelen = x1 - x0 + 1
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local ystridevm = sidelen + 32
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--local zstridevm = ystride ^ 2
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local chulens3d = {x=sidelen, y=sidelen+17, z=sidelen}
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local chulens2d = {x=sidelen, y=sidelen, z=1}
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local minpos3d = {x=x0, y=y0-16, z=z0}
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local minpos2d = {x=x0, y=z0}
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for name,elements in pairs(luamap.noises) do
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if luamap.noises[name].type == "2d" then
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luamap.noises[name].nobj = luamap.noises[name].nobj or minetest.get_perlin_map(luamap.noises[name].np_vals, chulens2d)
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luamap.noises[name].nvals = luamap.noises[name].nobj:get2dMap_flat(minpos2d)
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else -- 3d
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luamap.noises[name].nobj = luamap.noises[name].nobj or minetest.get_perlin_map(luamap.noises[name].np_vals, chulens3d)
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luamap.noises[name].nvals = luamap.noises[name].nobj:get3dMap_flat(minpos3d)
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end
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end
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local ni3d = 1
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local ni2d = 1
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for z = z0, z1 do
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for y = y0 - 16, y1 + 1 do
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local vi = area:index(x0, y, z)
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for x = x0, x1 do
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local noise_vals = {}
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for name,elements in pairs(luamap.noises) do
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if elements.type == "2d" then
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noise_vals[name] = elements.nvals[ni2d]
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else -- 3d
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noise_vals[name] = elements.nvals[ni3d]
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end
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end
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data[vi] = luamap.logic(noise_vals,x,y,z,seed)
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ni3d = ni3d + 1
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ni2d = ni2d + 1
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vi = vi + 1
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end
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ni2d = ni2d - sidelen
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end
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ni2d = ni2d + sidelen
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end
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luamap.precalc(data, area, vm, minp, maxp, seed)
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vm:set_data(data)
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vm:calc_lighting()
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vm:write_to_map(data)
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vm:update_liquids()
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end)
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