set the spawn point in spawn player plugin, send teleport packet if the position diff is too important, fix #5

doc/api.md

@@ -52,6 +52,7 @@
       - [player.login()](#playerlogin)
       - [player.others()](#playerothers)
       - [player.chat(message)](#playerchatmessage)
+      - [player.setSpawnPoint()](#playersetspawnpoint)
     - [Low level properties](#low-level-properties)
       - [player._client](#player_client)
     - [Low level methods](#low-level-methods)
@@ -242,6 +243,10 @@ return the other players than `player`
 
 sends `message` to the player
 
+#### player.setSpawnPoint()
+
+set the spawn point of a player
+
 ### Low level properties
 
 #### player._client

lib/playerPlugins/login.js

@@ -1,4 +1,5 @@
 var Entity=require("../entity");
+var vec3 = require("vec3");
 
 module.exports=inject;
 
@@ -7,6 +8,10 @@ function transformUuid(s)
   return s.split("-").map(function(item) { return parseInt(item, 16); });
 }
 
+function toFixedPosition(p)
+{
+  return new vec3(Math.floor(p.x*32),Math.floor(p.y*32),Math.floor(p.z*32))
+}
 
 function inject(serv,player)
 {
@@ -45,12 +50,20 @@ function inject(serv,player)
     });
   }
 
+  function sendSpawn()
+  {
+    console.log("setting spawn at "+player.spawnPoint);
+    player._client.write('spawn_position',{
+      "location":player.spawnPoint
+    });
+  }
+
   function sendInitialPosition()
   {
     player._client.write('position', {
-      x: 6,
-      y: 53,
-      z: 6,
+      x: player.spawnPoint.x,
+      y: player.spawnPoint.y,
+      z: player.spawnPoint.z,
       yaw: 0,
       pitch: 0,
       flags: 0x00
@@ -108,13 +121,14 @@ function inject(serv,player)
   function spawn()
   {
     player.getOthers().forEach(function (otherPlayer) {
+      var spawnPoint=toFixedPosition(otherPlayer.spawnPoint);
       var pos = otherPlayer.entity.position;
       player._client.write('named_entity_spawn', {
         entityId: otherPlayer.entity.id,
         playerUUID: transformUuid(otherPlayer._client.uuid),
-        x: pos ? pos.x : 6 * 32,
-        y: pos ? pos.y : 53 * 32,
-        z: pos ? pos.z : 6 * 32,
+        x: pos ? pos.x : spawnPoint.x,
+        y: pos ? pos.y : spawnPoint.y,
+        z: pos ? pos.z : spawnPoint.z,
         yaw: 0,
         pitch: 0,
         currentItem: 0,
@@ -122,12 +136,13 @@ function inject(serv,player)
       });
     });
 
+    var spawnPoint=toFixedPosition(player.spawnPoint);
     player._writeOthers('named_entity_spawn',{
       entityId: player.entity.id,
       playerUUID: transformUuid(player._client.uuid),
-      x: 6 * 32,
-      y: 53 * 32,
-      z: 6 * 32,
+      x: spawnPoint.x,
+      y: spawnPoint.y,
+      z: spawnPoint.z,
       yaw: 0,
       pitch: 0,
       currentItem: 0,
@@ -150,6 +165,8 @@ function inject(serv,player)
     addPlayer();
     sendLogin();
     sendMap();
+    player.setSpawnPoint();
+    sendSpawn();
     sendInitialPosition();
 
     player.emit("spawned");

lib/playerPlugins/spawn.js

@@ -0,0 +1,13 @@
+var vec3 = require("vec3");
+
+module.exports=inject;
+
+function inject(serv,player)
+{
+  function setSpawnPoint()
+  {
+    player.spawnPoint=new vec3(6,51,6);
+  }
+
+  player.setSpawnPoint=setSpawnPoint;
+}

lib/playerPlugins/updatePositions.js

@@ -24,7 +24,19 @@ function inject(serv,player)
   function sendRelativePositionChange(newPosition, onGround) {
     if (player.entity.position.distanceTo(new vec3(0, 0, 0)) != 0) {
       var diff = newPosition.minus(player.entity.position);
-      if (diff.distanceTo(new vec3(0, 0, 0)) != 0) {
+      if(diff.abs().x>256 || diff.abs().y>256 || diff.abs().z>256)
+      {
+        player._client.write('entity_teleport', {
+          entityId:player.entity.id,
+          x: newPosition.x,
+          y: newPosition.y,
+          z: newPosition.z,
+          yaw: 0,
+          pitch: 0,
+          onGround: onGround
+        });
+      }
+      else if (diff.distanceTo(new vec3(0, 0, 0)) != 0) {
         player._writeOthers('rel_entity_move', {
           entityId: player.entity.id,
           dX: diff.x,