forked from mtcontrib/Minetest-WorldEdit
Add //spiral and worldedit.spiral API function
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15
README.md
15
README.md
@ -109,6 +109,15 @@ Add cylinder at WorldEdit position 1 along the x/y/z/? axis with length <length>
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//cylinder z -12 3 mesecons:mesecon
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//cylinder ? 2 4 stone
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### //spiral <size> <node>
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Add Spiral at WorldEdit position 1 with size <size>, composed of <node>.
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//spiral 8 dirt
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//spiral 5 default:glass
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//spiral 2 stone
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### //copy x/y/z/? <amount>
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Copy the current WorldEdit region along the x/y/z/? axis by <amount> nodes.
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@ -216,6 +225,12 @@ Adds a cylinder at `pos` along the `axis` axis ("x" or "y" or "z") with length `
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Returns the number of nodes added.
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### worldedit.spiral(pos, size, nodename)
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Adds a Spiral at `pos` with size `size`.
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Returns the number of nodes changed.
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### worldedit.copy(pos1, pos2, axis, amount)
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Copies the region defined by positions `pos1` and `pos2` along the `axis` axis ("x" or "y" or "z") by `amount` nodes.
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@ -1,3 +1,4 @@
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dofile(minetest.get_modpath("worldedit") .. "/spirals.lua")
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--modifies positions `pos1` and `pos2` so that each component of `pos1` is less than or equal to its corresponding conent of `pos2`, returning two new positions
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worldedit.sort_pos = function(pos1, pos2)
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pos1 = {x=pos1.x, y=pos1.y, z=pos1.z}
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@ -182,6 +183,26 @@ worldedit.cylinder = function(pos, axis, length, radius, nodename)
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return count
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end
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--adds a spiral at `pos` with size `size`, returning the number of nodes changed
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worldedit.spiral = function(pos, size, nodename)
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local shift_x,shift_y
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sa = spiralt(size)
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shift_y = #sa -- "Height" of the Array
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local fe = sa[1]
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shift_x = #fe -- "Width" of the Array
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fe = nil
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local count = 0
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for x,v in ipairs(sa) do
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for y, z in ipairs(v) do
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minetest.env:add_node({x=pos.x-shift_x+x,y=pos.y-shift_y+y,z=pos.z+z}, {name=nodename})
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count = count + 1
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end
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end
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return count
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end
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--copies the region defined by positions `pos1` and `pos2` along the `axis` axis ("x" or "y" or "z") by `amount` nodes, returning the number of nodes copied
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worldedit.copy = function(pos1, pos2, axis, amount)
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local pos1, pos2 = worldedit.sort_pos(pos1, pos2)
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30
init.lua
30
init.lua
@ -216,6 +216,36 @@ minetest.register_chatcommand("/hollowcylinder", {
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end,
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})
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minetest.register_chatcommand("/spiral", {
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params = "<size> <node>",
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description = "Add Spiral at WorldEdit position 1 with size <size>, composed of <node>",
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privs = {worldedit=true},
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func = function(name, param)
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local pos = worldedit.pos1[name]
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if pos == nil then
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minetest.chat_send_player(name, "No WorldEdit region selected")
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return
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end
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local found, _, size, nodename = param:find("(%d+)%s+([^%s]+)$")
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if found == nil then
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minetest.chat_send_player(name, "Invalid usage: " .. param)
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return
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end
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if axis == "?" then
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axis = worldedit.player_axis(name)
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end
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if not worldedit.node_is_valid(pos, nodename) then
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minetest.chat_send_player(name, "Invalid node name: " .. param)
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return
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end
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local count = worldedit.spiral(pos, tonumber(size), nodename)
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minetest.chat_send_player(name, count .. " nodes changed")
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end,
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})
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minetest.register_chatcommand("/cylinder", {
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params = "x/y/z/? <length> <radius> <node>",
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description = "Add cylinder at WorldEdit position 1 along the x/y/z/? axis with length <length> and radius <radius>, composed of <node>",
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17
spirals.lua
Normal file
17
spirals.lua
Normal file
@ -0,0 +1,17 @@
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av, sn = math.abs, function(s) return s~=0 and s/av(s) or 0 end
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function sindex(y, x) -- returns the value at (x, y) in a spiral that starts at 1 and goes outwards
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if y == -x and y >= x then return (2*y+1)^2 end
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local l = math.max(av(y), av(x))
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return (2*l-1)^2+4*l+2*l*sn(x+y)+sn(y^2-x^2)*(l-(av(y)==l and sn(y)*x or sn(x)*y)) -- OH GOD WHAT
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end
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function spiralt(side)
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local ret, start, stop = {}, math.floor((-side+1)/2), math.floor((side-1)/2)
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for i = 1, side do
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ret[i] = {}
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for j = 1, side do
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ret[i][j] = side^2 - sindex(stop - i + 1,start + j - 1) --moves the coordinates so (0,0) is at the center of the spiral
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end
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end
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return ret
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end
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