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Completed: Client Side Prediction

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This commit is contained in:
Jeremiah Billmann
2013-06-12 22:29:38 -04:00
parent 649fece9f0
commit cd95410f00
3 changed files with 65 additions and 12 deletions
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client/garageserver.io.js
+41 -10
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@@ -1,6 +1,5 @@
/*
options = {
onUpdatePlayerPhysics: function (state),
onConnect: function()
onPlayerUpdate: function (data),
onPlayerDisconnect: function (id),
@@ -16,6 +15,7 @@ window.GarageServerIO = (function (window, socketio) {
var io = socketio,
socket = null,
sequenceNumber = 0,
processedSequenceNumber = 0,
players = [],
inputs = [],
updates = [],
@@ -65,6 +65,21 @@ window.GarageServerIO = (function (window, socketio) {
if (!updateFound) {
updates.push(data);
}
if (options.clientSidePrediction) {
for (updateIdx = 0; updateIdx < updates.length; updateIdx ++) {
if (updates[updateIdx].seq == processedSequenceNumber) {
updates.splice(0, updateIdx);
}
}
for (updateIdx = 0; updateIdx < inputs.length; updateIdx ++) {
if (inputs[updateIdx].seq == processedSequenceNumber) {
inputs.splice(0, updateIdx + 1);
}
}
if (updates.length > 0 && inputs.length > 0) {
options.onUpdatePhysics(updates[0].state, inputs);
}
}
} else {
for (playerIdx = 0; playerIdx < players.length; playerIdx ++) {
if (players[playerIdx].id === data.id) {
@@ -77,7 +92,7 @@ window.GarageServerIO = (function (window, socketio) {
}
}
if (!updateFound) {
players[playerIdx].updates.push( { state: data.state, seq: data.seq } );
players[playerIdx].updates.push({ state: data.state, seq: data.seq });
}
break;
}
@@ -88,7 +103,7 @@ window.GarageServerIO = (function (window, socketio) {
id: data.id,
updates: []
};
player.updates.push( { state: data.state, seq: data.seq } );
player.updates.push({ state: data.state, seq: data.seq });
players.push(player);
}
}
@@ -111,18 +126,34 @@ window.GarageServerIO = (function (window, socketio) {
}
},
addPlayerInput = function (input) {
sequenceNumber += 1;
inputs.push(input);
if (options.clientSidePrediction && options.onUpdatePhysics) {
addPlayerInput = function (clientInput) {
var currentState = {},
newState = {},
inputsToProcess = [];
if (options.clientSidePrediction) {
for (var i = 0; i < updates.length; i ++) {
if (updates[i].seq == processedSequenceNumber) {
currentState = updates[i].state;
}
}
}
sendPlayerInput(input);
sequenceNumber += 1;
inputs.push({ input: clientInput, seq: sequenceNumber });
if (options.clientSidePrediction && options.onUpdatePhysics) {
inputsToProcess.push({ input: clientInput });
newState = options.onUpdatePhysics(currentState, inputsToProcess);
processedSequenceNumber += 1;
updates.push({ state: newState, seq: processedSequenceNumber });
}
sendPlayerInput(clientInput);
},
sendPlayerInput = function (input) {
sendPlayerInput = function (clientInput) {
var currentTime = new Date().getTime();
socket.emit('input', { input: input, seq: sequenceNumber, timestamp: currentTime });
socket.emit('input', { input: clientInput, seq: sequenceNumber, timestamp: currentTime });
},
getPlayerStates = function (stateCallback) {