minetest.git - modified minetest for gpcfs purposes

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#!/bin/bash

# This script generates normalmaps using The GIMP to do the heavy lifting.
# give any unrecognized switch (say, -h) for usage info.

rm /tmp/normals_filelist.txt

numprocs=6

skiptools=false
skipinventory=false
invresolution=64
dryrun=false
pattern="*.png *.jpg"

filter=0
scale=8
wrap=0
heightsource=0
conversion=0
invertx=0
inverty=0

while test -n "$1"; do
	case "$1" in
		--scale|-s)
			if [ -z "$2" ] ; then echo "Missing scale parameter"; exit 1; fi
			scale=$2
			shift
			shift
			;;
		--pattern|-p)
			if [ -z "$2" ] ; then echo "Missing pattern parameter"; exit 1; fi
			pattern=$2
			shift
			shift
			;;
		--skiptools|-t)
			skiptools=true
			shift
			;;
		--skipinventory|-i)
			if [[ $2 =~ ^[0-9]+$ ]]; then
				invresolution=$2
				shift
			fi
			skipinventory=true
			shift
			;;
		--filter|-f)
			if [ -z "$2" ] ; then echo "Missing filter parameter"; exit 1; fi

			case "$2" in
				sobel3|1)
					filter=1
					;;
				sobel5|2)
					filter=2
					;;
				prewitt3|3)
					filter=3
					;;
				prewitt5|4)
					filter=4
					;;
				3x3|5)
					filter=5
					;;
				5x5|6)
					filter=6
					;;
				7x7|7)
					filter=7
					;;
				9x9|8)
					filter=8
					;;
				*)
					filter=0
					;;
			esac

			shift
			shift
			;;
		--heightalpha|-a)
			heightsource=1
			shift
			;;
		--conversion|-c)
				if [ -z "$2" ] ; then echo "Missing conversion parameter"; exit 1; fi

				case "$2" in
					biased|1)
						conversion=1
						;;
					red|2)
						conversion=2
						;;
					green|3)
						conversion=3
						;;
					blue|4)
						conversion=4
						;;
					maxrgb|5)
						conversion=5
						;;
					minrgb|6)
						conversion=6
						;;
					colorspace|7)
						conversion=7
						;;
					normalize-only|8)
						conversion=8
						;;
					heightmap|9)
						conversion=9
						;;
					*)
						conversion=0
						;;
			esac

			shift
			shift
			;;
		--wrap|-w)
			wrap=1
			shift
			;;
		--invertx|-x)
			invertx=1
			shift
			;;
		--inverty|-y)
			inverty=1
			shift
			;;
		--dryrun|-d)
			dryrun=true
			shift
			;;
		*)
			echo -e "\nUsage:\n"
			echo "`basename $0` [--scale|-s <value>] [--filter|-f <string>]"
			echo " [--wrap|-w] [--heightalpha|-a] [--invertx|-x] [--inverty|-y]"
			echo " [--conversion|-c <string>] [--skiptools|-t] [--skipinventory|-i [<value>]]"
			echo " [--dryrun|-d] [--pattern|-p <pattern>]"
			echo -e "\nDefaults to a scale of 8, checking all files in the current directory, and not"
			echo "skipping apparent tools or inventory images.  Filter, if specified, may be one"
			echo "of: sobel3, sobel5, prewitt3, prewitt5, 3x3, 5x5, 7x7, or 9x9, or a value 1"
			echo "through 8 (1=sobel3, 2=sobel5, etc.). Defaults to 0 (four-sample).  The height"
			echo "source is taken from the image's alpha channel if heightalpha is specified.\n"
			echo ""
			echo "If inventory skip is specified, an optional resolution may also be included"
			echo "(default is 64).  Conversion can be one of: biased, red, green, blue, maxrgb,"
			echo "minrgb, colorspace, normalize-only, heightmap or a value from 1 to 9"
			echo "corresponding respectively to those keywords.  Defaults to 0 (simple"
			echo "normalize) if not specified.  Wrap, if specified, enables wrapping of the"
			echo "normalmap around the edges of the texture (defaults to no).  Invert X/Y"
			echo "reverses the calculated gradients  for the X and/or Y dimensions represented"
			echo "by the normalmap (both default to non-inverted)."
			echo ""


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