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https://github.com/sbrl/Minetest-WorldEditAdditions.git
synced 2024-09-12 08:08:30 +02:00
It works! :D
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@ -41,6 +41,15 @@ end
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function worldeditadditions.convolve(pos1, pos2, kernel, kernel_size)
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pos1, pos2 = worldedit.sort_pos(pos1, pos2)
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local border_size = {}
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border_size[0] = (kernel_size[0]-1) / 2 -- height
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border_size[1] = (kernel_size[1]-1) / 2 -- width
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pos1.z = pos1.z - border_size[0]
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pos2.z = pos2.z + border_size[0]
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pos1.x = pos1.x - border_size[1]
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pos2.x = pos2.x + border_size[1]
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local manip, area = worldedit.manip_helpers.init(pos1, pos2)
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local data = manip:get_data()
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@ -52,8 +61,8 @@ function worldeditadditions.convolve(pos1, pos2, kernel, kernel_size)
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local heightmap_conv = worldeditadditions.shallowcopy(heightmap)
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local heightmap_size = {}
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heightmap_size[0] = pos2.z - pos1.z
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heightmap_size[1] = pos2.x - pos1.x
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heightmap_size[0] = (pos2.z - pos1.z) + 1
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heightmap_size[1] = (pos2.x - pos1.x) + 1
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worldeditadditions.conv.convolve(
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heightmap_conv,
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@ -61,25 +70,46 @@ function worldeditadditions.convolve(pos1, pos2, kernel, kernel_size)
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kernel,
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kernel_size
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)
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-- print("original")
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-- worldeditadditions.print_2d(heightmap, (pos2.z - pos1.z) + 1)
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-- print("transformed")
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-- worldeditadditions.print_2d(heightmap_conv, (pos2.z - pos1.z) + 1)
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-- It seems to be convolving as intended, but something's probably getting lost in translation below
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for z = heightmap_size[0], 0, -1 do
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for x = heightmap_size[1], 0, -1 do
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local hi = z*heightmap_size[1] + x
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local diff = heightmap_conv[hi] - heightmap[hi]
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local height_old = heightmap[hi]
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local height_new = heightmap_conv[hi]
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-- print("[conv/save] hi", hi, "height_old", heightmap[hi], "height_new", heightmap_conv[hi], "z", z, "x", x, "pos1.y", pos1.y)
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-- Lua doesn't have a continue statement :-/
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if diff ~= 0 then
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if height_old == height_new then
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-- noop
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elseif height_new < height_old then
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stats.removed = stats.removed + (height_old - height_new)
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local y = height_new
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while y < height_old do
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local ci = area:index(pos1.x + x, pos1.y + y, pos1.z + z)
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-- print("[conv/save] remove at y", y, "→", pos1.y + y, "current:", minetest.get_name_from_content_id(data[ci]))
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data[ci] = node_id_air
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y = y + 1
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end
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else -- height_new > height_old
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-- We subtract one because the heightmap starts at 1 (i.e. 1 = 1 node in the column), but the selected region is inclusive
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local node_id = data[area:index(pos1.x + x, pos1.y + (heightmap[hi] - 1), pos1.z + z)]
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if diff > 0 then
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stats.added = stats.added + diff
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for y = pos1.y + heightmap[hi], pos1.y + heightmap_conv[hi], 1 do
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data[area:index(pos1.x + x, y, pos1.z + z)] = node_id
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end
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else
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stats.removed = stats.removed + math.abs(diff)
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for y = pos1.y + heightmap_conv[hi], pos1.y + heightmap[hi], 1 do
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data[area:index(pos1.x + x, y, pos1.z + z)] = node_id_air
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end
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local node_id = data[area:index(pos1.x + x, pos1.y + (height_old - 1), pos1.z + z)]
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-- print("[conv/save] filling with ", node_id, "→", minetest.get_name_from_content_id(node_id))
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stats.added = stats.added + (height_new - height_old)
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local y = height_old
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while y < height_new do
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local ci = area:index(pos1.x + x, pos1.y + y, pos1.z + z)
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-- print("[conv/save] add at y", y, "→", pos1.y + y, "current:", minetest.get_name_from_content_id(data[ci]))
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data[ci] = node_id
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y = y + 1
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end
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end
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end
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@ -18,31 +18,40 @@ function worldeditadditions.conv.convolve(heightmap, heightmap_size, matrix, mat
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border_size[1] = (matrix_size[1]-1) / 2 -- width
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print("[convolve] matrix_size", matrix_size[0], matrix_size[1])
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print("[convolve] border_size", border_size[0], border_size[1])
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print("[convolve] heightmap_size: ", heightmap_size[0], heightmap_size[1])
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print("[convolve] z: from", (heightmap_size[0]-border_size[0]) - 1, "to", border_size[0], "step", -1)
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print("[convolve] x: from", (heightmap_size[1]-border_size[1]) - 1, "to", border_size[1], "step", -1)
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-- Convolve over only the bit that allows us to use the full convolution matrix
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for y = (heightmap_size[0]-border_size[0]) - 1, border_size[0], -1 do
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for z = (heightmap_size[0]-border_size[0]) - 1, border_size[0], -1 do
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for x = (heightmap_size[1]-border_size[1]) - 1, border_size[1], -1 do
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local total = 0
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for my = matrix_size[0]-1, 0, -1 do
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for mx = matrix_size[1]-1, 0, -1 do
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local mi = (my * matrix_size[1]) + mx
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local cy = y + (my - border_size[0])
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local cx = x + (mx - border_size[1])
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local i = (cy * heightmap_size[1]) + cx
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-- print("[convolve] i", i, "mi", mi, "matrix[mi]", matrix[mi], "heightmap[i]", heightmap[i])
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-- A value of -1 = nothing in this column (so we should ignore it)
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if heightmap[i] ~= -1 then
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total = total + (matrix[mi] * heightmap[i])
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local hi = (z * heightmap_size[1]) + x
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-- print("[convolve/internal] z", z, "x", x, "hi", hi)
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-- No continue statement in Lua :-/
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if heightmap[hi] ~= -1 then
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for mz = matrix_size[0]-1, 0, -1 do
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for mx = matrix_size[1]-1, 0, -1 do
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local mi = (mz * matrix_size[1]) + mx
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local cz = z + (mz - border_size[0])
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local cx = x + (mx - border_size[1])
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local i = (cz * heightmap_size[1]) + cx
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-- A value of -1 = nothing in this column (so we should ignore it)
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if heightmap[i] ~= -1 then
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total = total + (matrix[mi] * heightmap[i])
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end
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end
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end
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-- Rounding hack - ref https://stackoverflow.com/a/18313481/1460422
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-- heightmap[hi] = math.floor(total + 0.5)
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heightmap[hi] = math.ceil(total)
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end
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-- Rounding hack - ref https://stackoverflow.com/a/18313481/1460422
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heightmap[(y * heightmap_size[1]) + x] = math.floor(total + 0.5)
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end
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end
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@ -95,7 +95,7 @@ function worldeditadditions.print_2d(tbl, width)
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for i=0, #tbl do
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table.insert(next, worldeditadditions.str_padstart(tostring(tbl[i]), display_width))
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if #next == width then
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print(table.concat(next, "\t"))
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print(table.concat(next, ""))
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next = {}
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end
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end
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