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Implement scale_up

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Next up: testing!
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Starbeamrainbowlabs 2021-02-17 23:46:03 +00:00
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1 changed files with 64 additions and 61 deletions
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worldeditadditions/lib/scale_up.lua
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@ -11,65 +11,68 @@
-- @param direction Vector The direction to scale in - as a vector. e.g. { x = -1, y = 1, z = -1 } would mean scale in the negative x, positive y, and nevative z directions.
-- @return boolean, string|table Whether the operation was successful or not. If not, then an error messagea as a string is also passed. If it was, then a statistics object is returned instead.
function worldeditadditions.scale_up(pos1, pos2, scale, direction)
return false, "Error: Scaling up isn't implemented yet."
-- pos1, pos2 = worldedit.sort_pos(pos1, pos2)
-- if scale.x > 1 or scale.y > 1 or scale.z > 1 or scale.x < -1 or scale.y < -1 or scale.z < -1 then
-- return false, "Error: Scale factor vectors may not mix values -1 < factor < 1 and (1 < factor or factor < -1) - in other words, you can't scale both up and down at the same time (try worldeditadditions.scale, which automatically applies such scale factor vectors as 2 successive operations)"
-- end
-- if direction.x == 0 or direction.y == 0 or direction.z == 0 then
-- return false, "Error: One of the components of the direction vector was 0 (direction components should either be greater than or less than 0 to indicate the direction to scale in.)"
-- end
--
-- local scale_down = {
-- x = math.floor(1 / scale.x),
-- y = math.floor(1 / scale.y),
-- z = math.floor(1 / scale.z)
-- }
-- local size = vector.subtract(pos2, pos1)
--
-- local data = manip:get_data()
-- local data_copy = worldeditadditions.shallowcopy(data)
--
-- local node_id_air = minetest.get_content_id("air")
--
--
-- local count = 0 -- The number of nodes replaced
--
-- -- Zero out the area we're scaling down into
-- for i in area:iterp(pos1, pos2) do
-- data_copy[i] = node_id_air
-- end
--
-- local changes = { replaced = 0 }
-- 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 posi_rel = vector.subtract({ x = x, y = y, z = z }, pos1)
--
-- local posi_copy = worldeditadditions.shallowcopy(posi_rel)
-- posi_copy = vector.floor(vector.divide(scale_down))
--
-- if direction.x < 0 then posi_copy.x = size.x - posi_copy.x end
-- if direction.y < 0 then posi_copy.y = size.y - posi_copy.y end
-- if direction.z < 0 then posi_copy.z = size.z - posi_copy.z end
--
-- local posi_copy = vector.add(pos1, posi_copy)
--
-- local i_source = area:index(x, y, z)
-- local i_target = area:index(posi_copy.x, posi_copy.y, posi_copy.z)
--
-- -- Technically we could save some operations here by not setting
-- -- the target multiple times per copy, but the calculations
-- -- above are probably a lot more taxing
-- -- TODO Be more intelligent about deciding what node to replace with here
-- data_copy[i_target] = data[i_source]
-- end
-- end
-- end
--
--
-- -- Save the modified nodes back to disk & return
-- worldedit.manip_helpers.finish(manip, data_copy)
--
-- return true, changes
pos1, pos2 = worldedit.sort_pos(pos1, pos2)
if (scale.x < 1 and scale.x > -1) and (scale.y < 1 and scale.y > -1) and (scale.z < 1 and scale.z > -1) then
return false, "Error: Scale factor vectors may not mix values -1 < factor < 1 and (1 < factor or factor < -1) - in other words, you can't scale both up and down at the same time (try worldeditadditions.scale, which automatically applies such scale factor vectors as 2 successive operations)"
end
if direction.x == 0 or direction.y == 0 or direction.z == 0 then
return false, "Error: One of the components of the direction vector was 0 (direction components should either be greater than or less than 0 to indicate the direction to scale in.)"
end
local size = vector.subtract(pos2, pos1)
local pos1_big = vector.new(pos1)
local pos2_big = vector(pos2)
if direction.x < 1 then pos1_big.x = pos1_big.x - size.x
else pos2_big.x = pos2_big.x + size.x end
if direction.y < 1 then pos1_big.y = pos1_big.y - size.y
else pos2_big.y = pos2_big.y + size.y end
if direction.z < 1 then pos1_big.z = pos1_big.z - size.z
else pos2_big.z = pos2_big.z + size.z end
local manip_small, area_small = worldedit.manip_helpers.init(pos1, pos2)
local manip_big, area_big = worldedit.manip_helpers.init(pos1_big, pos2_big)
local data_source = manip_small:get_data()
local data_target = manip_big:get_data()
local node_id_air = minetest.get_content_id("air")
local kern_volume = math.abs(scale.x) * math.abs(scale.y) * math.abs(scale.z)
local changes = { updated = 0, scale = "scale_up" }
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 posi_rel = vector.subtract({ x = x, y = y, z = z }, pos1)
local kern_anchor = vector.add(
pos1_big,
vector.cross(
vector.add(posi_rel, 1),
scale
)
)
local source_val = data_source[area_small:index(x, y, z)]
for kz = kern_anchor.z, kern_anchor.z - scale.z, -1 do
for ky = kern_anchor.y, kern_anchor.y - scale.y, -1 do
for kx = kern_anchor.x, kern_anchor.x - scale.x, -1 do
data_target[area_big:index(kx, ky, kz)] = source_val
end
end
end
changes.updated = changes.updated + kern_volume
end
end
end
-- Save the region back to disk & return
worldedit.manip_helpers.finish(manip_big, data_target)
return true, changes
end