From fb5450e3ca8c8d19bc82d2d882e2882fa61c6669 Mon Sep 17 00:00:00 2001
From: Romain Beaumont <romain.rom1@gmail.com>
Date: Thu, 26 Nov 2015 01:08:10 +0100
Subject: [PATCH] unload chunks, progress on #127

---
 src/lib/plugins/world.js | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/src/lib/plugins/world.js b/src/lib/plugins/world.js
index a54a58e..ba6f6ba 100644
--- a/src/lib/plugins/world.js
+++ b/src/lib/plugins/world.js
@@ -68,6 +68,18 @@ module.exports.player=function(player,serv) {
     }
   };
 
+  player.unloadChunk = (chunkX,chunkZ) =>
+  {
+    delete player.loadedChunks[chunkX+","+chunkZ];
+    player._client.write('map_chunk', {
+      x: chunkX,
+      z: chunkZ,
+      groundUp: true,
+      bitMap: 0x0000,
+      chunkData: new Buffer(0)
+    });
+  };
+
   player.sendChunk = (chunkX,chunkZ,column) =>
   {
     return player.behavior('sendChunk', {
@@ -101,6 +113,11 @@ module.exports.player=function(player,serv) {
     var playerChunkX=Math.floor(player.position.x/16/32);
     var playerChunkZ=Math.floor(player.position.z/16/32);
 
+    Object.keys(player.loadedChunks)
+      .map((key) => key.split(","))
+      .filter(([x,z]) => Math.abs(x-playerChunkX)>view || Math.abs(z-playerChunkZ)>view)
+      .forEach(([x,z]) => player.unloadChunk(x,z));
+
     return spiral([view*2,view*2])
       .map(t => ({
         chunkX:playerChunkX+t[0]-view,