Minetest-WorldEditAdditions/worldeditadditions/lib/ellipsoid2.lua
2021-10-23 14:32:44 +01:00

76 lines
2.4 KiB
Lua

local wea = worldeditadditions
-- ███████ ██ ██ ██ ██████ ███████ ███████
-- ██ ██ ██ ██ ██ ██ ██ ██
-- █████ ██ ██ ██ ██████ ███████ █████
-- ██ ██ ██ ██ ██ ██ ██
-- ███████ ███████ ███████ ██ ██ ███████ ███████
function worldeditadditions.ellipsoid2(pos1, pos2, target_node, hollow)
pos1, pos2 = wea.Vector3.sort(pos1, pos2)
local volume = pos2:subtract(pos1)
local volume_half = volume:divide(2)
local radius = pos2:subtract(pos1):divide(2)
print("DEBUG:ellipsoid2 | pos1: "..pos1..", pos2: "..pos2..", target_node: "..target_node)
print("DEBUG:ellipsoid2 radius", radius)
-- position = { x, y, z }
local hollow_inner_radius = {
x = radius.x - 1,
y = radius.y - 1,
z = radius.z - 1
}
-- Fetch the nodes in the specified area
local manip, area = worldedit.manip_helpers.init(pos1, pos2)
local data = manip:get_data()
local node_id = minetest.get_content_id(target_node)
local count = 0 -- The number of nodes replaced
for z = pos2.z, pos1.z, -1 do
for y = pos2.y, pos1.y, -1 do
for x = pos2.x, pos1.x, -1 do
local pos_relative = wea.Vector3.new(x, y, z):subtract(pos1)
:subtract(volume_half)
print("DEBUG pos1", pos1, "pos2", pos2, "volume_half", volume_half, "pos_relative", pos_relative)
-- If we're inside the ellipse, then fill it in
local comp = pos_relative:divide(radius)
local ellipsoid_dist = comp:length_squared()
if ellipsoid_dist <= 1 then
local place_ok = not hollow;
if not place_ok then
-- It must be hollow! Do some additional calculations.
local hx_comp = x/hollow_inner_radius.x
local hy_comp = y/hollow_inner_radius.y
local hz_comp = z/hollow_inner_radius.z
-- It's only ok to place it if it's outside our inner ellipse
place_ok = hx_comp*hx_comp + hy_comp*hy_comp + hz_comp*hz_comp >= 1
end
if place_ok then
data[area:index(x, y, z)] = node_id
count = count + 1
end
end
end
end
end
-- Save the modified nodes back to disk & return
worldedit.manip_helpers.finish(manip, data)
return count
end