81 lines
3.0 KiB
Lua
81 lines
3.0 KiB
Lua
-- ███████ ██ ██ ██ ██████ ███████ ███████
|
|
-- ██ ██ ██ ██ ██ ██ ██ ██
|
|
-- █████ ██ ██ ██ ██████ ███████ █████
|
|
-- ██ ██ ██ ██ ██ ██ ██
|
|
-- ███████ ███████ ███████ ██ ██ ███████ ███████
|
|
|
|
--- Fills an ellipsoidal area around the given position with the target node.
|
|
-- The resulting ellipsoid may optionally be hollow (in which case
|
|
-- nodes inside the ellipsoid are left untouched).
|
|
-- @param position Vector3 The centre position of the ellipsoid.
|
|
-- @param radius Vector3 The radius of the ellipsoid in all 3 dimensions.
|
|
-- @param target_node string The name of the node to use to fill the ellipsoid.
|
|
-- @param hollow bool Whether the ellipsoid should be hollow or not.
|
|
-- @returns number The number of nodes filled to create the (optionally hollow) ellipsoid. This number will be lower with hollow ellipsoids, since the internals of an ellipsoid aren't altered.
|
|
function worldeditadditions.ellipsoid(position, radius, target_node, hollow)
|
|
-- 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
|
|
-- OPTIMIZE: We should be able to calculate a more efficient box-area here
|
|
local manip, area = worldedit.manip_helpers.init_radius(position, math.max(radius.x, radius.y, radius.z))
|
|
local data = manip:get_data()
|
|
|
|
local node_id = minetest.get_content_id(target_node)
|
|
|
|
local stride_z, stride_y = area.zstride, area.ystride
|
|
|
|
local count = 0 -- The number of nodes replaced
|
|
|
|
local idx_z_base = area:index(position.x - radius.x, position.y - radius.y, position.z - radius.z) -- initial z offset
|
|
for z = -radius.z, radius.z do
|
|
|
|
local idx_y_base = idx_z_base
|
|
for y = -radius.y, radius.y do
|
|
|
|
local i = idx_y_base
|
|
for x = -radius.x, radius.x do
|
|
|
|
-- If we're inside the ellipse, then fill it in
|
|
local x_comp, y_comp, z_comp = x/radius.x, y/radius.y, z/radius.z
|
|
local ellipsoid_dist = x_comp*x_comp + y_comp*y_comp + z_comp*z_comp
|
|
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[i] = node_id
|
|
count = count + 1
|
|
end
|
|
end
|
|
|
|
|
|
i = i + 1
|
|
end
|
|
idx_y_base = idx_y_base + stride_y
|
|
|
|
end
|
|
idx_z_base = idx_z_base + stride_z
|
|
|
|
end
|
|
|
|
|
|
-- Save the modified nodes back to disk & return
|
|
worldedit.manip_helpers.finish(manip, data)
|
|
|
|
return count
|
|
end
|