I want there to be a "Quickmatch" mode in my turn-based game, where the player gets automatically matched with the first player to become available. I'm using my own custom UI. My code so far looks like this:
- (void)quickMatch {
GKMatchRequest *request = [[GKMatchRequest alloc] init];
request.minPlayers = 2;
request.maxPlayers = 2;
request.playersToInvite = nil;
[GKTurnBasedMatch findMatchForRequest:request withCompletionHandler:^(GKTurnBasedMatch *match, NSError *error) {
NSLog(#"MATCH: %# %# %# %d",error,match,match.matchID,(int)match.status);
}];
This successfully creates a match, but the 2nd participant in the match has a null ID (playerID:(null) status:Matching).
I thought that if I ran this same code on another instance, using a different Game Center ID, then the two users would be matched against each other... but that does not appear to be correct. Whenever I call the GKTurnBasedMatch loadMatchesWithCompletionHandler function, I continue to retrieve the same matches, each with only 1 valid participant (the local player).
This question appears to be similar to iOS Development: How do I auto match players in Game Center? which does indicate that setting request.playersToInvite = nil; should accomplish auto-matching, yet this doesn't appear to be working for me.
How can I cause Game Center to automatically match these players against each other?
Let me address the issues you are seeing here. First off, it is not necessary to set the playersToInvite property to nil, as that is the default state unless players are assigned to it, however that is not causing your "issue". I put that in quotes because you actually did the code correctly, and only perceive a problem that isn't there. Let me walk you through what happens when findMatchForeRequest is completed.
When the completion block is called, Game Center has created a new GKTurnBasedMatch object with two participants, the first is the local player (you), and the second is actually an empty participant with a nil playerID. The reason for this is that Game Center does not assign all participants when a match is created with random (unassigned) opponents. A random participant is assigned when the turn is sent to them. In your game, that match will not show up in the cloud for others to play in until you take your first turn.
Now, calling loadMatchesWithCompletionHandler on your other device/Game Center ID will not automatically display the match UNLESS you specifically invited that player with playersToInvite (and have already taken your turn as specified above). Think about it like this: if it worked that way, every player in the world would see every auto-match in existence when they called loadMatchesWithCompletionHandler.
The other Game Center ID must actually call findMatchForRequest with no playersToInvite property set in order to be matched into the empty seat available in the game your other ID created. This way the paradigm of "it's always your turn" when creating a match is preserved, but that player is now in the second slot, not the first. Simply create a game on the second ID in the exact same way you did on the first, and your game will be created with two participants, the first being from the ID that originally created it, and the second being the ID that joined the match by calling findMatchForRequest. The key here is findMatchForRequest doesn't ALWAYS create a new match if playersToInvite is nil. If there is an existing match with an open seat, it will simply match the local player into that.
Happy Coding!
Corbin
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I am on Roblox again, and I wanna make a script where when a part is touched, if the player name is lorenzoomh, set the brickcolor to green. But if not, set it to red. my current code:
script.Parent.Touched:Connect(function(igottouched)
if game.Players.LocalPlayer.Name == "lorenzoomh" then
script.Parent.BrickColor = BrickColor.Green()
else
script.Parent.BrickColor = BrickColor.Red()
end
end)
which doesnt work btw
The answer to your question, "can I use a player's name in an if-statement" is yes. Your problem is that the LocalPlayer doesn't exist where you're trying to use it from.
See the docs for Players.LocalPlayer :
This property is only defined for LocalScripts ... as they run on the client. For the server (on which Script objects run their code), this property is nil.
You need to access the Player object a different way. The Touched event on a Part gives you access to the other object that touched it. You can use that to check if the other part belongs to a player's character model.
local target = game.Workspace.Part
-- listen for a player touching a block
target.Touched:Connect( function(otherPart)
-- check that the thing that touched is a character model
local character = otherPart.Parent
local isCharacter = character:FindFirstChild("Humanoid") ~= null
if isCharacter then
-- the character model name is usually the name of the player so use that
if character.Name == "lorenzoomh" then
target.BrickColor = BrickColor.Green()
else
target.BrickColor = BrickColor.Red()
end
end
end)
The Players service has a method for correlating a character model with a Player object specifically if a simple name check is not sufficient for your use case.
I want to detect multiple faces in my project. Therefore I planned to use the trackingID property of the CIFaceFure to keep the track of the face. But I found that every time it is coming same for every face.
So my problem is that how can I identify a face uniquely when multiple face are there in the video frame. I don't want to recognize the face for later purpose only detection for the current video frame. Thanks.
I am using the same code as in SqaureCam apple sample project. in iOS 6.
for ( CIFaceFeature *face in features ) {
NSLog(#"face.trackingID %d",face.trackingID);
}
The above code is priting the same ID for every face.
If you haven't already done so, you need to make sure to specify the usage of CIDetectorTracking in the detector's options. If I remember correctly, it should look something like this:
NSDictionary *detectorOptions = #{CIDetectorTracking: #YES};
CIDetector *detector = [CIDetector detectorOfType:CIDetectorTypeFace context:nil options:detectorOptions];
I am beginning to write a game using gamecenter matchmaking. Right now, two players can connect to each other, but I am having trouble figuring out how to distinguish between player 1 and 2. For example, I want player 1 to be able to move player 1 and player 2 to be able to move player 2.
The implementation would be specific to your app so it would be hard to answer more specifically, but basically each person's instance of the app could have an object that is "local player" and an object that is "opponent"... Both of them get to move the "local player" in their local instance, and changes to their "player" are obviously mapped to the "opponent" at the other end.
Just do a random number exchance to decide who will be player1 and make the first move.
Generate a random number and store it in a variable.
Send that generated random number to opponent.
Just like this, your opponent sends his own random number to you.
When you receive it, compare with yours.
If yours is greater than his, then you are player1 and he is player2. So you will make the first move.
If yours is lesser than his, then you are player2 and he is player1. So he will make the first move.
If yours and his number are equal (a very rare case) repeat the procedure.
As a reminder, you need to distinguish message types. So use different message type headers. For example: 'R' for random, 'M' for moves.
Is it possible to remove a part of a name given to a GameObject? For instance:
Im instantiating gameobjects for the use of bullets. I give them the name of the player shooting the bullet. So if a player's name is "Ben", his bullets are called Ben's bullet.
gameObject.name = playerName + "'s bullet";
Now I'm trying to use this name to know wich person gives the finishing blow to an other player. And to do this I want find the player object with the same name as the bullet, and update his kill count. So I want to remove the "'s bullet" part from the bullets name.
So long story short: Is it possible to remove a part of a name given to a GameObject?
Hope that this is clear enough en help is really appreciated. Thanks in advance!
Edit: This is the part where the name has to change:
if(other.gameObject.tag == "bullet"){
var colBullet = other.transform.name;
playerHealth = playerHealth - 5;
if(playerHealth <= 0){
onDie();
//colBullet = colBullet - "'s bullet";
GameObject.Find(colBullet);
} }
The name of the collided object is put in the colBullet variable. I printed it and it says: Playername's bullet. This works but now the only thing it needs is the 's bullet being removed
int suffixLength = "'s bullet".Length;
string player = gameObject.name.Substring(0, gameObject.name.Length - suffixLength);
But maybe it would be better to have a property that doesn't need manipulating to find the player name?
Long story short: keep a reference to the player in your GameObject, instead of its name. This way you save on look ups for the player if you want to, for example, increase the experience or gold the shooter has for each kill. For stray bullets, or recycled ones, just set Player to null.
I just can't figure out how this works. What I am trying to do is let two players play a game if a third player joins it can instantly join the game, if the fourth and last player joins it can also instantly join the game. They can also leave the game at anytime for whatever reason, if that happens there should be a space open for another person or for the same person to reconnect. That's the idea.
Now what I got is the following. I authenticate the local player for obvious reasons. Then I search for a match like so:
if (matchRequest) [matchRequest release];
matchRequest = [[GKMatchRequest alloc] init];
matchRequest.minPlayers = 2;
matchRequest.maxPlayers = 4;
[[GKMatchmaker sharedMatchmaker] findMatchForRequest:matchRequest withCompletionHandler:^(GKMatch *match, NSError *error) {
if (error) {
// An error occured
} else {
if (matchCurrent) [matchCurrent release];
matchCurrent = [match retain];
matchCurrent.delegate = self;
}
}];
If I execute this part on three different devices, two of them will find each other and the third is still looking. So I figured after the find match for request has found the minimum amount of players it will be executed once. So what I needed was a method that used the matchCurrent that I retained to add more players. Luckely that method existed, but how would that work? When do you call it in this case? I decided to put it under a button so I could manually execute it when a match has been found.
What I discovered is that when I pressed it on the first device, finally the third device could find the match the first and second device were in. In fact the second and third device contained the playerIDs of every device involved. Which is a good thing. But there are two problems.
Which device should actually call the addPlayersToMatch method? And how can you restrict it to one device executing that method? Plus when should you call it?
Why, on the device calling that method, isn't the playerIDs updated?
[[GKMatchmaker sharedMatchmaker] addPlayersToMatch:matchCurrent matchRequest:matchRequest completionHandler:^(NSError *error) {
//matchCurrent.playerIDs is not updated?!
}];
Actually they are updated. When I see the playerIDs appear on the second and third device I manually update the matchCurrent.playerIDs on device one and suddenly it does recognize the player. However even the 'didChangeState' for player is not called when the new player is discovered on device one.
Your using the Apple iOS Game Center GKMatchmaker class. I'm assuming you are using a peer to peer connection, not hosted.
The GKMatch class gives the playerIDs array to you.
#property(nonatomic, readonly) NSArray *playerIDs
This is an ordered list, so you might be able to use it to select the first player call addPlayersToMatch.
Linked below is some documentation.
http://developer.apple.com/library/ios/#documentation/GameKit/Reference/GKMatchmaker_Ref/Reference/Reference.html
http://developer.apple.com/library/ios/#documentation/GameKit/Reference/GKMatch_Ref/Reference/Reference.html
http://developer.apple.com/library/ios/#documentation/NetworkingInternet/Conceptual/GameKit_Guide/Introduction/Introduction.html#//apple_ref/doc/uid/TP40008304
Which device should actually call the
addPlayersToMatch method? And how can
you restrict it to one device
executing that method?
You could solve this problem by having the devices "draw straws". Each device generates a random number, then sends it to the others. The device with the largest number is the leader, and it is the one that must call addPlayersToMatch. If two devices pick the same number, throw out the numbers and start over.
I would suggest that you periodically (maybe once per second or two) poll for the status of other players, so you can detect if anyone has joined, or left for any reason. Unless the iphone architecture you are using already provides an function that handles that event.
It sounds like you may want to find some more documentation and/or sample code for the multi-player framework you are using.
I'm doing this with Unity via Prime31's GameCenterMultiplayerBinding. I'm not entirely sure how it maps to GameKit (the docs are sparse and don't give those details), but the names are very suggestive.
To be able to match 2 to 4 players into a match, I'm doing:
findMatchProgrammaticallyWithFilters(
minPlayers: 2,
maxPlayers: 4,
playerGroup: GetCurrentPlayerGroup(),
playerAttributes: 0);
I assume this maps to findMatchForRequest:withCompletionHandler.
After that succeeds, I call:
finishMatchmakingForMatch();
Which surely maps to finishMatchmakingForMatch. I found that calling findMatchForRequest or addPlayersToMatch would fail with "The requested operation has been canceled or disabled by the user" if I didn't call finishMatchmakingForMatch first.
addPlayersToCurrentMatchWithUpdatedMatchRequest(
minPlayers: 2,
maxPlayers: 4,
playerGroup: GetCurrentPlayerGroup(),
playerAttributes: 0,
playersToInvite: null);
addPlayersToMatch:matchRequest:completionHandler
After that succeeds, I call:
finishMatchmakingForMatch();
If I have space for more players, I loop and call addPlayersToMatch again.
I'd expect that since I need to call finishMatchmakingForMatch when I'm done
matchmaking, firing findMatchProgrammatically would keep looking until it
found maxPlayers, but it doesn't. It gives up after the first match. So we need
to call addPlayersToMatch.