FastAsyncWorldEdit/craftscripts/draw.js

// $Id$
/*
 * Very bad image drawer
 * Copyright (C) 2011 sk89q <http://www.sk89q.com>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/

importPackage(Packages.java.io);
importPackage(Packages.java.awt);
importPackage(Packages.javax.imageio);
importPackage(Packages.com.sk89q.worldedit);
importPackage(Packages.com.sk89q.worldedit.blocks);

function makeColor(r, g, b) {
    return new Color(r / 255, g / 255, b / 255);
}

var clothColors = [
    makeColor(0, 0, 0), // White
    makeColor(255, 100, 0), // Orange
    makeColor(200, 0, 200), // Magenta
    makeColor(87, 132, 223), // Light blue
    makeColor(255, 255, 0), // Yellow
    makeColor(0, 255, 0), // Green
    makeColor(255, 180, 200), // Pink
    makeColor(72, 72, 72), // Gray
    makeColor(173, 173, 173), // Light grey
    makeColor(0, 100, 160), // Cyan
    makeColor(120, 0, 200), // Purple
    makeColor(0, 0, 175), // Blue
    makeColor(100, 60, 0), // Brown
    makeColor(48, 80, 0), // Cactus green
    makeColor(255, 0, 0), // Red
    makeColor(0, 0, 0), // Black
]

// http://stackoverflow.com/questions/2103368/color-logic-algorithm/2103608#2103608
function colorDistance(c1, c2) {
    var rmean = (c1.getRed() + c2.getRed()) / 2;
    var r = c1.getRed() - c2.getRed();
    var g = c1.getGreen() - c2.getGreen();
    var b = c1.getBlue() - c2.getBlue();
    var weightR = 2 + rmean/256;
    var weightG = 4.0;
    var weightB = 2 + (255-rmean)/256
    return Math.sqrt(weightR*r*r + weightG*g*g + weightB*b*b);
}

function findClosestWoolColor(col) {
    var closestId = 0;
    var closestDistance = colorDistance(col, clothColors[0]);
    
    for (var i = 1; i < clothColors.length; i++) {
        var dist = colorDistance(col, clothColors[i]);
        
        if (dist < closestDistance) {
            closestId = i;
            closestDistance = dist;
        }
    }
    
    return closestId;
}

var sess = context.remember();

context.checkArgs(1, 1, "<image>");

var f = context.getSafeFile("drawings", argv[1]);

if (f != null) {
    var img = ImageIO.read(f);

    var width = img.getWidth();
    var height = img.getHeight();

    var origin = player.getBlockIn();

    for (var x = 0; x < width; x++) {
        for (var y = 0; y < height; y++) {
            var c = new Color(img.getRGB(x, y));
            var data = findClosestWoolColor(c);
            sess.setBlock(origin.add(x, 0, y), new BaseBlock(35, data));
        }
    }
}