Created a script to aid in the creation of new textures for whatever mods

depend on unifieddyes.  Rewrote README and expanded it to document the usage of
that script.

README

@@ -1,8 +1,160 @@
-This is a pretty extensive dyes mod, which has the sole purpose of 
+VanessaE's Unified Dyes Mod
-supplying a complete set of colors and a few greys, all of which are 
+===========================
-intended to be used by other mods as needed to make colored objects.  It 
+
-uses Ironzorg's Flowers mod as the source of the actual pigments.  
+This is a pretty extensive dyes mod, which has the sole purpose of supplying a 
-Flowers can be had from one of the links below, or as part of neko259's 
+complete set of colors and a few greys, all of which are intended to be used by 
-Nature Pack.
+other mods as needed to make colored objects.  It uses Ironzorg's Flowers mod 
+as the source of the actual pigments (this same mod is part of neko259's nature 
+pack, and can be found in a few other mods/mod packs as well).
 
 In total, this mod provides [b]77[/b] colors (including greys) at present.
+
+Usage instructions, technical information
+=========================================
+
+Colors
+------
+
+Creating a particular color of dye is pretty simple - just harvest coal, 
+cactus, or the appropriate flowers and start smelting them and crafting the 
+results together to get the various colors.  There are 12 base colors, which 
+are formed as follows (the degree figure is that color's hue on a standard HSV 
+color wheel, and is what is used in the textures supplied with this mod):
+
+Red (0°):  smelt one rose (yields 2 portions of red dye)
+Orange (30°):  smelt one tulip (yields 2) or mix red+yellow (yields 2)
+Yellow (60°):  smelt one yellow dandelion (yields 2)
+Lime (90°):  mix yellow + green (yields 2)
+Green (120°): smelt one cactus or one waterlily (yields 2), 
+              or mix yellow + blue (yields 2)
+Aqua (150°):  mix green + cyan (yields 2)
+Cyan (180°):  green + blue (yields 2)
+Sky blue (210°):  mix cyan + blue (yields 2)
+Blue (240°): Smelt one viola (yields 2)
+Violet (270°):  mix blue + magenta (yields 2) or mix 2 blues + 1 red (yields 3)
+Magenta (300°):  Mix blue + red (yields 2)
+Red-violet (330°):  mix magenta + red (yields 2)
+
+
+Greys
+-----
+
+There are also three shades of grey plus pure black and pure white (figures in 
+parenthesis indicate the intended brightness of the shade, relative to white):
+
+Black (0%):         smelt one piece of coal (yields 2)
+Dark grey (25%):    mix one portion of white paint with two portions of black dye
+                    (yields 3)
+Medium grey (50%):  mix one white and one black (yields 2)
+Light grey (75%):   mix two white and one black (yields 3)
+White (100%):       see below.
+
+To obtain a medium-brightness (66%) version of a given color, mix the desired 
+base color from the list above with one portion of black dye (for example, 
+medium lime = lime + black).  All such mixtures yield two portions of the final 
+color.
+
+To obtain a dark (33%) version of a given color, use two portions of black dye 
+along with the base color, which yields three portions of the final color.
+
+
+White Paint
+-----------
+
+To get the white paint mentioned above, first smelt some cobble into smooth 
+stone as usual.  Then, smelt one smooth stone block to get 10 portions of 
+Titanium Dioxide.  Finally, craft one portion of that with a bucket of water 
+and one piece of jungle grass.  Yields one bucket of white paint.
+
+
+Reduced saturation colors
+-------------------------
+
+To get the low saturation (50%) version of one of the base colors, mix one or 
+more of white, black, or a shade of grey with the desired base color:
+
+Dark, low saturation: dark grey paint + color (yields 2), or two blacks + 1 
+white + color (yields 4).  For example, dark, low-saturation red = red + dark 
+grey paint, or red + two black + one white.
+
+Medium brightness, low saturation: medium grey paint + color (yields 2), or 
+black + white + color (yields 3).  For example, medium, low-saturation green = 
+green + medium grey, or green + black + white.
+
+Bright, low saturation: light grey + color (yields 2), or 1 black + 2 whites + 
+color (yields 4).  For example, bright, low-saturation blue = blue + light 
+grey, or blue + black + 2 white.
+
+
+RGB values
+----------
+
+All RGB values and filenames for all colors and shades of grey are represented 
+in the file "colors.txt" (which is generated with the bash script 
+"listcolors.sh", which actually reads from the texture files included with this 
+mod), included in the distribution directory.  This script requires 
+Imagemagick.
+
+
+Misc. Notes
+-----------
+
+If you need to use /give commands, the node names are of the following format:
+
+unifieddyes:{nothing or "medium_" or "dark_"}{color}{nothing or "_s50"}.
+
+For example, low saturation dark yellow would be "unifieddyes:dark_yellow_s50", 
+while bright, full-saturation red would simply be "unifieddyes:red".
+
+See the texture filenames in the textures/ folder for further hints - all of 
+the item names follow the same format as the filenames, save for having a colon 
+(:) instead of the first underscore (_).
+
+
+Semi-automatic generation of new textures
+=========================================
+
+Obviously, in order for this mod to be useful, you'll need textures to use with 
+your crafting recipes.  If you plan to support the entire range of colors 
+supplied by this mod, there is a BASH script included in the distribution 
+directory, named gentextures.sh, which will, with an appropriately- colored and 
+appropriately-named source texture, generate a complete set of colored and 
+greyscale textures based on that first one.
+
+This script requires bc (the calculator program) to handle some basic math 
+regarding the hue adjustments, and Imagemagick's "convert" program handles all 
+of the actual conversions.
+
+To make this script for your mod, open it in your favorite editor and change 
+the TEXTURE variable near the top of the file to whatever your particular mod 
+will use as the basis of its texture filenames.  For example, the default is 
+cotton, so the files created by the script will be named cotton_xxxxxx.png for 
+each of the supported colors.
+
+Then, using yoiur favorite image editor, create a single version of your 
+desired texture.  Draw it in the brightest, deepest shade of RED you can muster 
+without losing any detail, and save it out.  Ideally, you will want the average 
+color of the texture, when taking into account all bright and dark areas, to be 
+as close as possible to the hex value
+#FF0000 (0 degrees, 100% saturation, pure red) without losing any appreciable 
+#detail
+
+Save this source texture out with a filename of red_base_whatever.png, where 
+"whatever" is the same name you used in the TEXTURE variable above.  The 
+default cotton setting, thus, would need a filename of red_base_cotton.png.
+
+Copy the gentextures.sh script to the same directory where you placed the base 
+texture, chmod 755 gentextures.sh if necessary, and run it using the usual 
+dot-slash notation: ./gentextures.sh
+
+The program will exit immediately if it can't find the base texture it needs 
+(i.e. if you didn't supply it, or if you named it wrong, or if it isn't it in 
+the same directory as the script).
+
+Otherwise, the program will create a new folder named generated-textures/ and 
+then iterate through all of the hues and shades that are supported by 
+unifieddyes (though this is done manually, not by reading anything from the 
+mod).  All of the output files will be placed in that folder.
+
+Use your favorite image browser or file manager to review the results, and if 
+they're right, copy them over to the textures/ folder in your mod.

gentextures.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+# This line defines the base of the filename, e.g. cotton_xxx_xxx.png
+TEXTURE="cotton"
+
+# This defines the name of the bright red source texture that will
+# be used to generate all of the others.
+base_texture="red_base_"$TEXTURE".png"
+
+base_colors="red orange yellow lime green aqua cyan skyblue blue violet magenta redviolet"
+
+echo -e "\nCurrently configured to generate filenames based on "$TEXTURE"."
+
+if [ ! -e "$base_texture" ] ; then {
+	echo -e "\nPlease supply a proper base texture from which to generate all"
+	echo "of the colors.  It must be named "$base_texture" and must"
+	echo -e "be placed in the directory you ran this script from.\n"
+	exit 1
+} fi
+
+pushd . >/dev/null
+mkdir generated-textures
+cd generated-textures
+
+hue=0
+for name in $base_colors ; do
+	hue2=`echo "scale=10; ("$hue"*200/360)+100" |bc`
+	echo $name "("$hue" degrees)"
+	echo "     dark"
+	convert ../$base_texture -modulate  33,100,$hue2 $TEXTURE"_dark_"$name".png"
+	echo "     medium"
+	convert ../$base_texture -modulate  66,100,$hue2 $TEXTURE"_medium_"$name".png"
+	echo "     bright"
+	convert ../$base_texture -modulate 100,100,$hue2 $TEXTURE"_"$name".png"
+	echo "     dark, 50% saturation"
+	convert ../$base_texture -modulate  33,50,$hue2  $TEXTURE"_dark_"$name"_s50.png"
+	echo "     medium, 50% saturation"
+	convert ../$base_texture -modulate  66,50,$hue2  $TEXTURE"_medium_"$name"_s50.png"
+	echo "     bright, 50% saturation"
+	convert ../$base_texture -modulate 100,50,$hue2  $TEXTURE"_"$name"_s50.png"
+	hue=$((hue+30))
+done
+
+echo "greyscales"
+echo "     black"
+convert ../$base_texture -modulate  15,0,0  $TEXTURE"_black.png"
+echo "     dark grey"
+convert ../$base_texture -modulate  50,0,0  $TEXTURE"_darkgrey.png"
+echo "     medium grey"
+convert ../$base_texture -modulate 100,0,0  $TEXTURE"_mediumgrey.png"
+echo "     light grey"
+convert ../$base_texture -modulate 150,0,0  $TEXTURE"_lightgrey.png"
+echo "     white"
+convert ../$base_texture -modulate 190,0,0  $TEXTURE"_white.png"
+
+popd >/dev/null