Partial implementation of block digging

nodecraft.js

@@ -167,6 +167,18 @@ function login(session, pkt) {
 	session.pump();
 }
 
+function blockdig(session, pkt) {
+	if (pkt.status == 0x3)
+	{
+		session.world.terrain.setCellType(pkt.x,pkt.y,pkt.z,0x0);
+		session.stream.write(ps.makePacket({
+				type: 0x35,
+				x: pkt.x, y: pkt.y, z: pkt.z, blockType: 0,
+				blockMetadata: 0
+			}));
+	}
+}
+
 function flying(session, pkt) {
 }
 
@@ -175,10 +187,30 @@ var packets = {
 	0x01: login,
 	0x02: handshake,
 	0x0a: flying,
+	0x0e: blockdig,
 };
 
-world = new Object();
+
+
+var world = new Object();
 world.terrain = new terrain.WorldTerrain();
+world.time = 0;
+world.sessions = [];
+
+function sendTicks()
+{
+	for (var i=0; i<world.sessions.length; i++)
+	{
+		var session = world.sessions[i];
+		session.stream.write(ps.makePacket({
+			type: 0x04,
+			time: world.time
+		}));
+	}
+	world.time += 20;
+}
+
+setTimeout(1000, sendTicks());
 
 var server = net.createServer(function(stream) {
 	stream.on('connect', function () {
@@ -193,6 +225,7 @@ var server = net.createServer(function(stream) {
 	var clientsession = new session.Session();
 	clientsession.stream = stream;
 	clientsession.world = world;
+	world.sessions.push(clientsession);
 
 	var partialData = new Buffer(0);
 	stream.on('data', function (data) {

ps.js

@@ -67,6 +67,24 @@ var packItems = function (items) {
 	}
 	return buf;
 }
+
+var unpackMultiBlocks = function (pkt) {
+	var blocks = [];
+	var numBlocks = parsers.short(pkt);
+	for (var i = 0; i < numBlocks; i++)
+	{
+		coord = parsers.short(pkt);
+		blocks.push({x: (coord >> 12), z: ((coord >> 8) & 0xF), y: (coord & 0xFF)})
+	}
+	for (var i = 0; i < numBlocks; i++)
+		blocks[i].type = parsers.byte(pkt);
+
+	for (var i = 0; i < numBlocks; i++)
+		blocks[i].meta = parsers.byte(pkt);
+
+	return blocks;
+}
+
 var unpackItems = function (pkt) {
 	var items = [];
 	var numItems = parsers.short(pkt);
@@ -91,18 +109,26 @@ function bool(name) { return ['bool', name]; }
 function double(name) { return ['double', name]; }
 function float(name) { return ['float', name]; }
 function items(name) { return ['items', name]; }
+function multiblock(name) { return ['multiblock', name]; }
 function intstr(name) { return ['intstr', name]; }
 
 var clientPacketStructure = {
 	0x00: [],
 	0x01: [int('protoVer'), str('username'), str('password')],
 	0x02: [str('username')],
+	0x05: [int('invType'), items('items')],
 	0x0a: [bool('isFlying')],
 	0x0b: [double('x'), double('y'), double('stance'), double('z'),
 	       bool('flying')],
 	0x0c: [float('rotation'), float('pitch'), bool('flying')],
 	0x0d: [double('x'), double('y'), double('stance'), double('z'),
 	       float('rotation'), float('pitch'), bool('flying')],
+
+	0x0e: [byte('status'), int('x'), byte('y'), int('z'), byte('face')],
+	0x10: [int('uid'), short('item')],
+	0x12: [int('uid'), byte('unk')],
+
+	0xff: [str('message')], // disconnect
 }
 
 var serverPacketStructure = {
@@ -132,6 +158,7 @@ var serverPacketStructure = {
 	0x32: [int('x'), int('z'), bool('mode')], // prechunk
 	0x33: [int('x'), short('y'), int('z'), byte('sizeX'), byte('sizeY'),
 	       byte('sizeZ'), intstr('chunk')], // map chunk, gzipped
+	0x34: [int('x'), int('z'), multiblock('blocks')], // multi block change
 	0x35: [int('x'), byte('y'), int('z'), byte('blockType'), byte('blockMetadata')],
 	0x3b: [int('x'), short('y'), int('z'), str('nbt')],
 	0xff: [str('message')], // disconnect
@@ -149,6 +176,7 @@ var packetNames = {
 	0x0b: 'PLAYER_POSITION',
 	0x0c: 'PLAYER_LOOK',
 	0x0d: 'PLAYER_MOVE_LOOK',
+	0x0e: 'DIG_BLOCK',
 	0x10: 'WIELD',
 	0x12: 'ARM_ANIM',
 	0x14: 'PLAYER_SPAWN',
@@ -195,6 +223,7 @@ var parsers = {
 	bool: unpackBool,
 	float: unpack_fmt('f'),
 	double: unpack_fmt('d'),
+	multiblock: unpackMultiBlocks,
 	items: unpackItems,
 	intstr: unpackIntString,
 }

terrain.js

@@ -83,7 +83,7 @@ WorldTerrain.prototype.getChunk = function(x, z, done_callback) {
 		done_callback(this.chunks[[x,z]]);
 }
 
-WorldTerrain.prototype.getCell = function(x,y,z, done_callback)
+WorldTerrain.prototype.getCellType = function(x,y,z, done_callback)
 {	
 	var me = this;
 
@@ -95,6 +95,19 @@ WorldTerrain.prototype.getCell = function(x,y,z, done_callback)
 			});
 }
 
+WorldTerrain.prototype.setCellType = function(x,y,z,t)
+{	
+	var me = this;
+
+	this.getChunk(x-x%this.chunk_xz_granularity, z-z%this.chunk_xz_granularity,
+			function(chunk_data) {
+				var x_i = x%me.chunk_xz_granularity;
+				var z_i = z%me.chunk_xz_granularity;
+				chunk_data.setType(x_i, y, z_i, t);
+			});
+}
+
+
 WorldTerrain.prototype.getMaxHeight = function(x, z, done_callback) {
 	var currentY = 127;
 	var me = this;
@@ -107,10 +120,10 @@ WorldTerrain.prototype.getMaxHeight = function(x, z, done_callback) {
 			return;
 		}
 		currentY--;
-		me.getCell(x, currentY, z, iterate);
+		me.getCellType(x, currentY, z, iterate);
 	}
 
-	me.getCell(x, currentY, z, iterate);
+	me.getCellType(x, currentY, z, iterate);
 }
 
 module.exports.WorldTerrain = WorldTerrain;