Minetest-WorldEditAdditions/worldeditadditions/lib/noise/run2d.lua
Starbeamrainbowlabs 1310dae884
Refactor: Split up terrain.lua, make subtable wea.terrain
This is just the start, if my plans work out.

The eventual aim here is to implement a generic Heightmap2D class, just 
like Vector3.

This will make interacting with heightmaps much easier.
2021-12-31 02:42:32 +00:00

65 lines
2.3 KiB
Lua

--- Applies a layer of 2D noise over the terrain in the defined region.
-- @module worldeditadditions.noise2d
local wea = worldeditadditions
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--- Applies a layer of 2d noise over the terrain in the defined region.
-- @param pos1 Vector pos1 of the defined region
-- @param pos2 Vector pos2 of the defined region
-- @param noise_params table A noise parameters table.
function wea.noise.run2d(pos1, pos2, noise_params)
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
-- pos2 will always have the highest co-ordinates now
-- Fill in the default params
-- print("DEBUG noise_params_custom ", wea.format.map(noise_params))
noise_params = wea.noise.params_apply_default(noise_params)
-- print("DEBUG noise_params[1] ", wea.format.map(noise_params[1]))
-- Fetch the nodes in the specified area
local manip, area = worldedit.manip_helpers.init(pos1, pos2)
local data = manip:get_data()
local heightmap_old, heightmap_size = wea.terrain.make_heightmap(
pos1, pos2,
manip, area,
data
)
local heightmap_new = wea.table.shallowcopy(heightmap_old)
local success, noisemap = wea.noise.make_2d(
heightmap_size,
pos1,
noise_params)
if not success then return success, noisemap end
local message
success, message = wea.noise.apply_2d(
heightmap_new,
noisemap,
heightmap_size,
pos1, pos2,
noise_params[1].apply
)
if not success then return success, message end
local stats
success, stats = wea.terrain.apply_heightmap_changes(
pos1, pos2,
area, data,
heightmap_old, heightmap_new,
heightmap_size
)
if not success then return success, stats end
-- Save the modified nodes back to disk & return
worldedit.manip_helpers.finish(manip, data)
return true, stats
end