minetestmapper/autogenerating-colors.txt

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==FILE== mods/dumpnodes/init.lua
local function nd_get_tiles(nd)
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return nd.tiles or nd.tile_images
end
local function nd_get_tile(nd, n)
local tile = nd_get_tiles(nd)[n]
if type(tile) == 'table' then
tile = tile.name
end
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return tile
end
local function pairs_s(dict)
local keys = {}
for k in pairs(dict) do
table.insert(keys, k)
end
table.sort(keys)
return ipairs(keys)
end
minetest.register_chatcommand("dumpnodes", {
params = "",
description = "",
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func = function(player, param)
local n = 0
local ntbl = {}
for _, nn in pairs_s(minetest.registered_nodes) do
local nd = minetest.registered_nodes[nn]
local prefix, name = nn:match('(.*):(.*)')
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if prefix == nil or name == nil then
print("ignored(1): " .. nn)
else
if ntbl[prefix] == nil then
ntbl[prefix] = {}
end
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ntbl[prefix][name] = true
end
end
local out, err = io.open('nodes.txt', 'wb')
if not out then
return true, "io.open(): " .. err
end
for _, prefix in pairs_s(ntbl) do
out:write('# ' .. prefix .. '\n')
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for _, name in pairs_s(ntbl[prefix]) do
local nn = prefix .. ":" .. name
local nd = minetest.registered_nodes[nn]
if nd.drawtype == 'airlike' or nd_get_tiles(nd) == nil then
print("ignored(2): " .. nn)
else
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local tl = nd_get_tile(nd, 1)
tl = (tl .. '^'):match('(.-)^') -- strip modifiers
out:write(nn .. ' ' .. tl .. '\n')
n = n + 1
end
end
out:write('\n')
end
out:close()
return true, n .. " nodes dumped."
end,
})
==FILE== avgcolor.py
#!/usr/bin/env python
import sys
from math import sqrt
from PIL import Image
if len(sys.argv) < 2:
print("Prints average color (RGB) of input image")
print("Usage: %s <input>" % sys.argv[0])
exit(1)
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inp = Image.open(sys.argv[1]).convert('RGBA')
ind = inp.load()
cl = ([], [], [])
for x in range(inp.size[0]):
for y in range(inp.size[1]):
px = ind[x, y]
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if px[3] < 128: continue # alpha
cl[0].append(px[0]**2)
cl[1].append(px[1]**2)
cl[2].append(px[2]**2)
if len(cl[0]) == 0:
print("Didn't find average color for %s" % sys.argv[1], file=sys.stderr)
print("0 0 0")
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else:
cl = tuple(sqrt(sum(x)/len(x)) for x in cl)
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print("%d %d %d" % cl)
==SCRIPT==
#!/bin/bash -e
AVGCOLOR_PATH=/path/to/avgcolor.py
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GAME_PATH=/path/to/minetest_game
MODS_PATH= # path to "mods" folder, only set if you have loaded mods
NODESTXT_PATH=./nodes.txt
COLORSTXT_PATH=./colors.txt
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while read -r line; do
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set -- junk $line; shift
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if [[ -z "$1" || $1 == "#" ]]; then
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echo "$line"; continue
fi
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tex=$(find $GAME_PATH -type f -name "$2")
[[ -z "$tex" && -n "$MODS_PATH" ]] && tex=$(find $MODS_PATH -type f -name "$2")
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if [ -z "$tex" ]; then
echo "skip $1: texture not found" >&2
continue
fi
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echo "$1" $(python $AVGCOLOR_PATH "$tex")
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echo "ok $1" >&2
done < $NODESTXT_PATH > $COLORSTXT_PATH
# Use nicer colors for water and lava:
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sed -re 's/^default:((river_)?water_(flowing|source)) [0-9 ]+$/default:\1 39 66 106 128 224/g' $COLORSTXT_PATH -i
sed -re 's/^default:(lava_(flowing|source)) [0-9 ]+$/default:\1 255 100 0/g' $COLORSTXT_PATH -i
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# Add transparency to glass nodes and xpanes:
sed -re 's/^default:(.*glass) ([0-9 ]+)$/default:\1 \2 64 16/g' $COLORSTXT_PATH -i
sed -re 's/^doors:(.*glass[^ ]*) ([0-9 ]+)$/doors:\1 \2 64 16/g' $COLORSTXT_PATH -i
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sed -re 's/^xpanes:(.*(pane|bar)[^ ]*) ([0-9 ]+)$/xpanes:\1 \3 64 16/g' $COLORSTXT_PATH -i
# Delete some usually hidden nodes:
sed '/^doors:hidden /d' $COLORSTXT_PATH -i
sed '/^fireflies:firefly /d' $COLORSTXT_PATH -i
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sed '/^butterflies:butterfly_/d' $COLORSTXT_PATH -i
==INSTRUCTIONS==
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1) Make sure avgcolors.py works (outputs the usage instructions when run)
2) Add the dumpnodes mod to Minetest
3) Create a world and load dumpnodes & all mods you want to generate colors for
4) Execute /dumpnodes ingame
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5) Run the script to generate colors.txt (make sure to adjust the PATH variables at the top)