72 lines
3.4 KiB
Lua
72 lines
3.4 KiB
Lua
local wea_c = worldeditadditions_core
|
|
local Vector3 = wea_c.Vector3
|
|
|
|
--- Applies changes to a heightmap to a Voxel Manipulator data block.
|
|
-- @param pos1 vector Position 1 of the defined region
|
|
-- @param pos2 vector Position 2 of the defined region
|
|
-- @param area VoxelArea The VoxelArea object (see worldedit.manip_helpers.init)
|
|
-- @param data number[] The node ids data array containing the slice of the Minetest world extracted using the Voxel Manipulator.
|
|
-- @param heightmap_old number[] The original heightmap from worldeditadditions.make_heightmap.
|
|
-- @param heightmap_new number[] The new heightmap containing the altered updated values. It is expected that worldeditadditions.table.shallowcopy be used to make a COPY of the data worldeditadditions.make_heightmap for this purpose. Both heightmap_old AND heightmap_new are REQUIRED in order for this function to work.
|
|
-- @param heightmap_size vector The x / z size of the heightmap. Any y value set in the vector is ignored.
|
|
-- @returns bool, string|{ added: number, removed: number } A bool indicating whether the operation was successful or not, followed by either an error message as a string (if it was not successful) or a table of statistics (if it was successful).
|
|
local function apply_heightmap_changes(pos1, pos2, area, data, heightmap_old, heightmap_new, heightmap_size)
|
|
local stats = { added = 0, removed = 0 }
|
|
local node_id_air = minetest.get_content_id("air")
|
|
local node_id_ignore = minetest.get_content_id("ignore")
|
|
|
|
for z = heightmap_size.z - 1, 0, -1 do
|
|
for x = heightmap_size.x - 1, 0, -1 do
|
|
local hi = z*heightmap_size.x + x
|
|
|
|
local height_old = heightmap_old[hi]
|
|
local height_new = heightmap_new[hi]
|
|
-- print("[conv/save] hi", hi, "height_old", heightmap_old[hi], "height_new", heightmap_new[hi], "z", z, "x", x, "pos1.y", pos1.y)
|
|
|
|
-- Lua doesn't have a continue statement :-/
|
|
if height_old == height_new then
|
|
-- noop
|
|
elseif height_new < height_old then
|
|
local node_id_replace = data[area:index(
|
|
pos1.x + x,
|
|
pos1.y + height_old + 1,
|
|
pos1.z + z
|
|
)]
|
|
-- Unlikely, but if it can happen, it *will* happen.....
|
|
if node_id_replace == node_id_ignore then
|
|
node_id_replace = node_id_air
|
|
end
|
|
stats.removed = stats.removed + (height_old - height_new)
|
|
local y = height_new
|
|
while y < height_old do
|
|
local ci = area:index(pos1.x + x, pos1.y + y, pos1.z + z)
|
|
-- print("[conv/save] remove at y", y, "→", pos1.y + y, "current:", minetest.get_name_from_content_id(data[ci]))
|
|
if data[ci] ~= node_id_ignore then
|
|
data[ci] = node_id_replace
|
|
end
|
|
y = y + 1
|
|
end
|
|
else -- height_new > height_old
|
|
-- We subtract one because the heightmap starts at 1 (i.e. 1 = 1 node in the column), but the selected region is inclusive
|
|
local node_id = data[area:index(pos1.x + x, pos1.y + (height_old - 1), pos1.z + z)]
|
|
-- print("[conv/save] filling with ", node_id, "→", minetest.get_name_from_content_id(node_id))
|
|
|
|
stats.added = stats.added + (height_new - height_old)
|
|
local y = height_old
|
|
while y < height_new do
|
|
local ci = area:index(pos1.x + x, pos1.y + y, pos1.z + z)
|
|
-- print("[conv/save] add at y", y, "→", pos1.y + y, "current:", minetest.get_name_from_content_id(data[ci]))
|
|
if data[ci] ~= node_id_ignore then
|
|
data[ci] = node_id
|
|
end
|
|
y = y + 1
|
|
end
|
|
end
|
|
end
|
|
end
|
|
|
|
return true, stats
|
|
end
|
|
|
|
return apply_heightmap_changes
|