mirror of
https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-12-30 17:27:29 +01:00
1310dae884
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.
62 lines
2.2 KiB
Lua
62 lines
2.2 KiB
Lua
local wea = worldeditadditions
|
|
|
|
|
|
--- Applies the given noise field to the given heightmap.
|
|
-- Mutates the given heightmap.
|
|
-- @param heightmap number[] A table of ZERO indexed numbers representing the heghtmap - see worldeditadditions.terrain.make_heightmap().
|
|
-- @param noise number[] An table identical in structure to the heightmap containing the noise values to apply.
|
|
-- @param heightmap_size {x:number,z:number} A 2d vector representing the size of the heightmap.
|
|
-- @param region_height number The height of the defined region.
|
|
-- @param apply_mode string The apply mode to use to apply the noise to the heightmap.
|
|
-- @returns bool[,string] A boolean value representing whether the application was successful or not. If false, then an error message as a string is also returned describing the error that occurred.
|
|
function wea.noise.apply_2d(heightmap, noise, heightmap_size, pos1, pos2, apply_mode)
|
|
if type(apply_mode) ~= "string" and type(apply_mode) ~= "number" then
|
|
return false, "Error: Expected value of type string or number for apply_mode, but received value of type "..type(apply_mode)
|
|
end
|
|
|
|
local region_height = pos2.y - pos1.y
|
|
|
|
|
|
-- print("NOISE APPLY_2D\n")
|
|
wea.format.array_2d(noise, heightmap_size.x)
|
|
|
|
|
|
local height = tonumber(apply_mode)
|
|
-- print("DEBUG apply_mode", apply_mode, "as height", height)
|
|
|
|
for z = heightmap_size.z - 1, 0, -1 do
|
|
for x = heightmap_size.x - 1, 0, -1 do
|
|
local i = (z * heightmap_size.x) + x
|
|
|
|
if apply_mode == "add" then
|
|
heightmap[i] = wea.round(heightmap[i] + noise[i])
|
|
elseif apply_mode == "multiply" then
|
|
heightmap[i] = wea.round(heightmap[i] * noise[i])
|
|
elseif height then
|
|
-- Rescale from 0 - 1 to -1 - +1
|
|
local rescaled = (noise[i] * 2) - 1
|
|
-- Rescale to match the height specified
|
|
rescaled = rescaled * height
|
|
rescaled = math.floor(wea.clamp(
|
|
heightmap[i] + rescaled,
|
|
0, region_height
|
|
))
|
|
heightmap[i] = rescaled
|
|
else
|
|
return false, "Error: Unknown apply mode '"..apply_mode.."'"
|
|
end
|
|
end
|
|
end
|
|
|
|
-- for z = heightmap_size.z - 1, 0, -1 do
|
|
-- x = 0
|
|
-- heightmap[(z * heightmap_size.x) + x] = z
|
|
-- end
|
|
|
|
-- print("HEIGHTMAP\n")
|
|
-- worldeditadditions.format.array_2d(heightmap, heightmap_size.x)
|
|
|
|
|
|
return true
|
|
end
|