big nasty function to find flat areas
Izzy
parent
a507933974
commit
9db4f7af6a
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local type_lookup = {}
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for name,def in pairs(minetest.registered_nodes) do
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if def.groups.soil then
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type_lookup[minetest.get_content_id(name)] = 1 -- 1 is "ground"
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elseif def.groups.cracky then
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type_lookup[minetest.get_content_id(name)] = 1 -- cracky things are part of the ground
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elseif def.groups.sand then
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type_lookup[minetest.get_content_id(name)] = 1
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elseif def.groups.crumbly then
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type_lookup[minetest.get_content_id(name)] = 1 -- gravel, clay, snow, etc
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elseif def.groups.choppy then
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type_lookup[minetest.get_content_id(name)] = 0 -- trees, wood, etc
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elseif def.groups.snappy then
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type_lookup[minetest.get_content_id(name)] = 0 -- grass, leaves, etc
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elseif def.groups.fleshy then
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type_lookup[minetest.get_content_id(name)] = 0 -- apples
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elseif def.groups.liquid then
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type_lookup[minetest.get_content_id(name)] = 0 -- water, lava
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end
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end
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type_lookup[minetest.get_content_id("air")] = 0
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bt.register_action("AreaIsFlat", {
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tick = function(node, data)
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if not data.targetPos then
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return "failed"
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end
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data.targetPos = vector.floor(data.targetPos)
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local mmin = vector.add(node.min, data.targetPos)
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local mmax = vector.add(node.max, data.targetPos)
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-- local x1 = node.max.x + data.targetPos.x
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-- local y1 = node.max.y + data.targetPos.y
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-- local z1 = node.max.z + data.targetPos.z
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-- local x0 = node.min.x + data.targetPos.x
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-- local y0 = node.min.y + data.targetPos.y
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-- local z0 = node.min.z + data.targetPos.z
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local vm = minetest.get_voxel_manip()
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local emin, emax = vm:read_from_map(
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mmin,
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mmax
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)
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local area = VoxelArea:new{MinEdge=emin, MaxEdge=emax}
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local data = vm:get_data()
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print(dump(emin))
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print(dump(emax))
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local x1 = mmax.x -- node.min.x
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local y1 = mmax.y -- node.min.y
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local z1 = mmax.z -- node.min.z
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local x0 = mmin.x
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local y0 = mmin.y
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local z0 = mmin.z
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function ind(x, y, z)
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local i = (z * area.zstride) + (y * area.ystride) + x + 1
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return math.floor(i)
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end
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local deltas = {}
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local last_y = (y1 + y0) / 2
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local total_found = 0
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local mean = 0
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local total_missing = 0
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-- print(x1 .. " " .. y1 .. " " ..z1 )
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for z = z0, z1 do -- for each xy plane progressing northwards
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for x = x0, x1 do -- for each node do
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local y = math.floor(y1 / 2)
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local vi = area:index(x, y, z)
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local t = type_lookup[data[vi]] or 0
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-- print(t .. " d:" .. data[vi].. " - x: " .. x .. ", y: " .. y .. ", z: " ..z)
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local found = false
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if t == 0 then -- in the air, go down
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while y > y0 do
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y = y - 1
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vi = area:index(x, y, z)
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t = type_lookup[data[vi]] or 0
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-- print("too high "..y)
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-- print(t .. " d:" .. data[vi].. " - x: " .. x .. ", y: " .. y .. ", z: " ..z)
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if t == 1 then
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-- found the ground
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-- print(minetest.get_name_from_content_id(data[vi]))
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found = true
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break
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else
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-- print(minetest.get_name_from_content_id(data[vi]))
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end
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end
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else -- underground, go up
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while y < y1 do
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y = y + 1
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vi = area:index(x, y, z)
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-- print("too low " .. y)
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t = type_lookup[data[vi] ] or 0
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-- print(t .. " d:" .. data[vi].. " - x: " .. x .. ", y: " .. y .. ", z: " ..z)
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-- print(
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if t == 0 then
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-- found the sky, go back down one
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y = y - 1
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vi = area:index(x, y, z)
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-- print(minetest.get_name_from_content_id(data[vi]))
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found = true
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break
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else
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-- print(minetest.get_name_from_content_id(data[vi]))
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end
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end
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end
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if found then
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vi = area:index(x, y, z)
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-- print("----- found " .. data[vi] .. " " ..minetest.get_name_from_content_id(data[vi]))
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last_y = y
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local dy = y - y0
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deltas[dy] = (deltas[dy] or 0) + 1
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total_found = total_found + 1
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mean = mean + dy
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else
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total_missing = total_missing + 1
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-- print("--------- missing")
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end
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end
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end
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print("total_found ".. total_found)
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print("total_missing ".. total_missing)
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print(dump(deltas))
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mean = mean / total_found
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local variance = 0
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for k,v in pairs(deltas) do
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local d = mean - k
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variance = variance + (d * d)
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end
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variance = variance / total_found
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print("variance: ".. variance)
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if variance > node.max_variance then
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return "failed"
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end
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return "success"
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end,
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ctor = function(min, max, max_variance)
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return {
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min = min,
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max = max,
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max_variance = max_variance,
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}
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end,
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})
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