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Remove server reconciliation in favor of pure client prediction

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The reconciliation system caused visible teleportation at high latency
(e.g. 250ms Germany→Korea): position corrections snapped the local
player and thrown items back to stale server states.

- Drop the inputAck/seq tracking, InputBuffer, and applyReconciliation.
  The client predicts locally and the server stays authoritative via
  the existing worldUpdate broadcast; own-doll updates remain ignored.
- Override Item.setUpdateData on the client so in-flight items run free
  on local Box2D physics (client and server share the same throw
  impulse) and only sync when stationary or far out of sync. This keeps
  grab-sensor contact accurate while eliminating mid-flight snapping.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Jeena 2026-05-28 23:35:22 +00:00
parent a0481ed867
commit d39a55e20e
8 changed files with 31 additions and 152 deletions
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10
app/Game/Channel/Control/PlayerController.js
View file

@ -11,7 +11,6 @@ function(Parent, nc, Parser) {
function PlayerController(player) {
Parent.call(this, player);
this._lastProcessedSeq = 0;
}
PlayerController.prototype = Object.create(Parent.prototype);
@ -30,14 +29,7 @@ function(Parent, nc, Parser) {
}
for (var command in message) {
var commandOptions = message[command];
// Track sequence number from client input commands
if (commandOptions && typeof commandOptions === 'object' && commandOptions._seq !== undefined) {
this._lastProcessedSeq = commandOptions._seq;
}
this[command].call(this, commandOptions);
this[command].call(this, message[command]);
}
};

17
app/Game/Channel/GameController.js
View file

@ -120,23 +120,6 @@ function (Parent, PhysicsEngine, Settings, requestAnimFrame, nc, Box2D, Player,
nc.trigger(nc.ns.channel.to.client.gameCommand.broadcast, "worldUpdate", update);
}
// Send per-user input acknowledgments for server reconciliation
for (var id in this.players) {
var player = this.players[id];
if (player.isSpawned() && player.playerController._lastProcessedSeq > 0) {
var body = player.doll.body;
nc.trigger(
nc.ns.channel.to.client.user.gameCommand.send + id,
"inputAck",
{
seq: player.playerController._lastProcessedSeq,
p: { x: body.GetPosition().x, y: body.GetPosition().y },
lv: { x: body.GetLinearVelocity().x, y: body.GetLinearVelocity().y }
}
);
}
}
this.worldUpdateTimeout = setTimeout(this.updateWorld.bind(this), Settings.NETWORK_UPDATE_INTERVAL);
};