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importPackage(Packages.com.sk89q.worldedit);
importPackage(Packages.com.sk89q.worldedit.blocks);
importPackage(Packages.com.sk89q.worldedit.tools);
importPackage(Packages.com.sk89q.worldedit.tools.brushes);
importPackage(Packages.com.sk89q.worldedit.patterns);

var bSize = argv.length > 1 ? parseInt(argv[1]) : 4;
var maxFaces = argv.length > 2 ? (argv[2]) : 2;		
var strength = argv.length > 3 ? (argv[3]) : 1;

var xOff = ['1', '-1', '1', '1', '-1', '1', '-1', '-1'];
var yOff = ['1', '1', '-1', '1', '-1', '-1', '1', '-1'];
var zOff = ['1', '1', '1', '-1', '1', '-1', '-1', '-1'];

if (bSize == 0)	{bSize = 4;}
var blocks = new Array();

var tool = context.getSession().getBrushTool(player.getItemInHand());
var matPat = new SingleBlockPattern(new BaseBlock(maxFaces));

tool.setSize(bSize);
tool.setFill(matPat);

var brush = new Brush({
    strength : strength,
    build : function(editSession,pos,mat,bSize) {
		
		var session = context.remember();
 
		for (iteration = 1; iteration <= strength; iteration++)	{

			var matID = mat.getBlock().getType();
			maxFaces = ((matID >= 0) && (matID <= 6)) ? matID : 3;
			
			var blockTotal = 0;			
			var blockCnt = 0;			
			var blockFaces = new Array(6);

			radius = bSize + 0.5;
			var invRadius = 1 / radius;
			var ceilRadius = Math.ceil(radius);

			var nextXn = 0;
			forX: for (var x = 0; x <= ceilRadius; ++x) {
				var xn = nextXn;
				nextXn = (x + 1) * invRadius;
				var nextYn = 0;
				forY: for (var y = 0; y <= ceilRadius; ++y) {
					var yn = nextYn;
					nextYn = (y + 1) * invRadius;
					var nextZn = 0;
					forZ: for (var z = 0; z <= ceilRadius; ++z) {
						var zn = nextZn;
						nextZn = (z + 1) * invRadius;

						var distanceSq = lengthSq(xn, yn, zn);
						if (distanceSq > 1) {
							if (z == 0) {
								if (y == 0) {
									break forX;
								}
								break forY;
							}
							break forZ;
						}
										
						for (var dirLoop = 0; dirLoop <= 7 ; dirLoop++)	{
						
							var pt = pos.add(x * xOff[dirLoop], y * yOff[dirLoop], z * zOff[dirLoop]);
							var curBlock = editSession.getBlock(pt);
							
							blockCnt = 0;
							blockFaces = [];
							
							blockFaces[1] = editSession.getBlockType(pt.add(1,0,0));
							blockFaces[2] = editSession.getBlockType(pt.add(-1,0,0));
							blockFaces[3] = editSession.getBlockType(pt.add(0,1,0));
							blockFaces[4] = editSession.getBlockType(pt.add(0,-1,0));
							blockFaces[5] = editSession.getBlockType(pt.add(0,0,1));
							blockFaces[6] = editSession.getBlockType(pt.add(0,0,-1));	
							
							for (var lpC = 1; lpC <= 6; lpC++) {
								if((blockFaces[lpC]) == 0) {blockCnt++;}												
							}
							
							if (blockCnt >= maxFaces) {
							
								blocks[blockTotal] = BlockID.AIR;
							}
							else {
								blocks[blockTotal] = curBlock.getType();
							}
							blockTotal++;
						}
					}
				}