Objective-C is a general-purpose, high-level, object-oriented programming language. It's mainly used for game development on Apple iOS and Mac OS devices, however it's not limitied to this platforms.

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529 views

OpenGL ES Faces appear to be transparent when alpha is 1.0?

I am working on an object (OBJ File) loader for my app on iOS, currently I have successfully read the vertices and the faces of the object, and I am now just adding colours to the imported models. I ...
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164 views

Making a card game [closed]

I'm making a card game, for mainly knowledge reasons. My tendency to learn so far has been to create and struggle through to have the knowledge at the end. However, I've never made a game before. My ...
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36 views

CCActionMoveBy doesnot working properly when the action called for many of the sprite in cocos2d

I have an issue with CCActionMoveBy when I call the movement action for many of my sprites. I need to move to a certain position and then remove it from the scene. My problem is If the call the ...
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1answer
281 views

applyAngularVelocity causes error when called right after object instantiation

I'm trying to make a physicsBody rotate as soon as it is instantiated. CCNode* ball = [CCBReader load:@"Ball"]; [ball.physicsBody applyForce:force]; [ball.physicsBody ...
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98 views

How can i stack up tiles for Connect4 objective C? [closed]

I am trying to learn Objective C and iOS programming. And I'm trying to build a Connect Four. So Far i got this. I've been looking around and asking around but I haven't got the answer to my ...
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1answer
120 views

Where can I find info on grid based algorithms for stateless AI? [closed]

There seems to be an overwhelming amount of info out there on AI of all kinds, and it's kind hard to digest at once. For my testing purposes, I'm creating a "typical stateless AI", as described in ...
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275 views

Image Texture Tracing Algorithm - Cocos2D Box2D

Context: I am working on a 2D Destructible Terrain engine for Cocos2D with Box2D. All images, when a level loads, have their border's traced and cached for the purposes of forming Box2D b2EdgeShape ...
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437 views

Objective-C Moving UIView along a curved path

I'm not sure if I am approaching this the correct way. In my app, when a user touches the screen I capture the point and create an arc from a fixed point to that touch point. I then want to move a ...
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301 views

How do I use Objective-C libraries in Cocos2d-x?

We've created several libraries in Objective-C in the past, and now we're moving to the Cocos2d-x game engine. We can't figure out how to reference and use those libraries (we've also tried compiling ...
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1answer
89 views

Data model for unlockable card collection

My game has a collection of cards (about 64) that are unlocked (one by one) provided that 4 items are collected/gained in the game. Right now the deck of cards is modeled with a plist file, like ...
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256 views

Design pattern for procedural terrain assets [closed]

I'm developing a procedural terrain class at the moment and am stuck on the correct design pattern. The terrain is 2D and is constructed from a series of (x,y) points. I currently have a method that ...
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317 views

Cocos2D and iPhone's accelerometer [closed]

good afternoon! Today I've started to develop a game and I got a trouble. So, first at all I would like to say that I have no experience developing games... So, I've a CCSprite in the layer and I ...
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136 views

Game Development Resources? [closed]

I want to make an iPhone game and I was wondering if somebody could point me to some resources. Before you rage and close this, I am not looking for just a tutorial on programming, I could just google ...
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0answers
417 views

Zoom Layer centered on a Sprite

I am in process of developing a small game where a space-ship travels through a layer (doh!), in some situations the spaceship comes close to an enemy space ship, and the whole layer is zoomed in on ...
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1answer
373 views

Objective - Gestures while finger touches screen

I'm creating a space cocos2d game with objetive-c. I have in the bottom left 2 arrows to move the sprite left or right. I also implemented a swipe gesture to change weapon, however it only happens ...
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1answer
4k views

Cocos2d CCSpriteFrameCache: couldn't load texture file

I am currently doing this Cocos2d tutorial: http://www.raywenderlich.com/1271/how-to-use-animations-and-sprite-sheets-in-cocos2d ...and get the following error messages: 2011-12-30 16:36:28.536 ...
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1answer
1k views

How to make the accelerometer work in different angles

I am working on some Cocos2D tutorials (doodle drop) and have downloaded the program on my device. The program is working but I have to hold the iPhone in a very specific, and not very good, angle to ...
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4answers
436 views

How do I randomly create and store enemy data for my iPhone game?

In my game you need to protect something from enemies. There can be many on the screen at once. But I don't know how to create the enemies randomly, and how I can save the data to each enemy? Can give ...
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1answer
262 views

Long running calculation on background thread

In my Cocos2D game for iOS I have a relatively long running calculation that happens at a fairly regular interval (every 1-2 seconds). I'd like to run the calculation on a background thread so the ...
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1answer
61 views

memorizing button tap code iOS game

I'm using a single view app in Xcode 6.1 for my game with Storyboards. Not unity or sprite kit. It's a small game not even 3MB. Anyways, I created un-lockable characters with a BOOLEAN. ...
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1answer
252 views

Incorrect sprite rotation with atan2() [duplicate]

I want to rotate a sprite so that it faces the mouse cursor/screen touch location. Currently I'm using the following method to compute the angle of rotation. The input position is the target point the ...
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2answers
64 views

Count number of CCNodes of a certain class on a layer

Pretty simple question. I'm working in Objective C (cocos2d) and I'm trying to count the number of a sprites of a certain class are present on the current layer being displayed. For example, I have a ...
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1answer
221 views

Help with concrete examples of Perlin Noise variables for terrain generation

I believe this question can help beginner game developers. I've looked through a dozen or so answers on perlin noise here and on Stackoverflow, and found only 1 concrete implementation of perlin noise ...
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1answer
861 views

Cocos2d how to correctly preload a spritesheet before the scene start?

I'm working on a game with Objective-C and Cocos2d, the game has a huge number of images, and obviously as I add images on the spritesheet (well yes I'm using spritesheets) the loading time get ...
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1answer
625 views

Quit the application when clicking cancel button of Alert View in C#

Can someone guide me as to how can I make an application quit when you press the cancel button of an Alert View in C# code? Thanks I forgot to add that I am trying to quit application on clicking ...
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1answer
432 views

Triangles in a C++ STL Vector as an Objective-C member sometimes draws incorrectly in OpenGL ES

The polygons draw correctly 80% of the time. When it fails, a vertex is dislocated. The polygon is consistently drawn with the wrong vertex. I checked that the vector is correct during initialization, ...
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1answer
146 views

CCSprite x and y comparison

I have 2 CCSprites and I want to tell if their x and y are equal I tried this: if(sam.position.x == tom.position.x && sam.position.y == tom.position.y){ NSLog(@"Hooray!"); } Although I do ...
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1answer
1k views

b2Body moves without stopping

I got a quite strange bug. It is difficult to explain it in two words, but i'll try to do this in short. My b2Body has restitution, friction, density, mass and collision group. I'm controlling my ...
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1answer
936 views

Cocos2d: how to add anchor points to CCSpriteBatchNode

I am doing some tests with animations in Cocos2D using sprite-sheets. The animation works ok except that the anchor-point is in the center. I need to put it in the bottom. With the code below i am not ...
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2answers
443 views

What is the most secure way to archive a GKScore to be re-submitted later?

I'm looking for the safest way to archive and store a GKScore that needs to be re-submitted to Game Center (say, because the user didn't have a network connection at the time the score was earned). I ...
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1answer
333 views

try to create CCSpriteFrame but get nil values

I'm trying to animate a CCSprite in cocos2d v3 following this question, but I'm getting the following error message in Log: Terminating app due to uncaught exception 'NSInvalidArgumentException', ...
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1answer
576 views

Tower defense endless levels logic sprite kit [closed]

I am making a tower defense game for iOS using Sprite Kit. I would like for my game to support an endless number of levels, like in Bloons TD 5. What approach should I take to implement this?
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1answer
87 views

Create body on a sprite (box2D)

I'm quite experimented in objective C, but now i'm tried cocos2D and his features. I need to add a body on a spritesheet (if possible on a classic 'UIImageView'), in order to detect collisions after. ...
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1answer
156 views

How to store NPC movement data?

In my 2D tile-based game, I have NPCs that move around on a fixed path. I am putting the information about the NPCs in a .plist file that is loaded on startup. The thing is, I'm not sure how to format ...
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1answer
649 views

Using depth buffer on a sprite

I am following this guide: http://www.cocos2d-iphone.org/wiki/doku.php/prog_guide:tiled_maps Trying to create a tiled map that also supports multiple layers. The guide says that a way is to use ...
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1answer
844 views

Admob banner not getting remove from superview

I am developing one 2d game using cocos2d framework, in this game i am using admob for advertising, in some classes not in all classes but admob banner is visible in every class and after some time ...
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1answer
566 views

OpenGLES how to make a 3D object iOS

I am a newbie in OpenGLES, so pardon me if I cannot state the question properly. Is it possible to create a 3D box with the following imports only: OpenGLES, QuartzCore, GLKit I have created a 2D ...
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1answer
1k views

Level selection view - similiar to Angry Bird's

I am making game and need to prepare view for level selection. Could you recommend me some opensource library which could I use? I need icons to vibrate after long pressing one of them, some callbacks ...
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1answer
2k views

How to simulate a water splash effect?

I need to achieve the effect of a ball falling down into a pool then splashing in the water. At first, I made a sensor to detect the collision between the ball and the water and then show the sprite ...
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1answer
610 views

Thread-safety in Cocos2d-iPhone?

After tinkering a bit with cocos2d, I discovered that there is no classic game loop and everything is more-or-less event driven. I guess I can wrap my head around that, no problem. But I cannot find ...
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1answer
381 views

Keep running CGRectIntersect Method - Objective C

I have two UIImageViews. mainSprite, and enemy1. And I have a method that makes enemy1 start moving towards mainSprite. So here's that method. -(void)enemy1Aggro{ if ...
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1answer
394 views

objective-c iphone sdk side scrolling

I was making a game and I did the side scrolling like this: if the player get past 150, the player stops moving and the background starts moving. But thats very annoying with placing objects in the ...
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3answers
459 views

How can I spawn multiple monsters in my game?

I made a little iPhone game in which I want to make multiple monsters spawn. I have one UIImageView called enemy that spawns at beginning of the game. But I want it to spawn many more monsters until ...
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1answer
76 views

Transition from UIView to CCScene in Cocos2D

I've surfed the internet for quite some time but haven't come to find an answer. Any help would be greatly appreciated. I am trying to perform a transition from a UIView to a CCScene So i have a class ...
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0answers
23 views

Particles starting around specific shape?

I'm trying to solve a difficult UI issue with my iOS/Cocos2d game - I need a visual way of highlighting when a user has made a unique connection of the game pieces (think: a user a forms a triangle ...
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48 views

iOS / Gamekit - Leaderboards empty after adding in 3 values from different accounts

I am trying to query for the high score and rank of a player on a leaderboard. I am using some code found on the Apple website: - (void) retrieveTopTenScores { GKLeaderboard *leaderboardRequest = ...
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28 views

Reverting 2d canvas?

I'm making a multiplayer game which involves drawing lines. It's based this game: http://curvefever.com/sites/default/files/resize/remote/ef86488088c618df13b34f8b87aafd4e-1107x808.jpg. The game is ...
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0answers
89 views

Cocos2d v3 - addChild method make performance problems

i have currently a performance problem with the addChild method in cocos2d version 3.3. My scenario is currently that i have about ten CCNode which holds a bundle of other CCNode (about 500), i called ...
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83 views

Cocos2D v3 CCParallaxNode scrolling can't keep player in focus

I am very fresher to game development and I need to develop a game like NinjaJump. I have created a CCParallaxNode to setup scrolling background and added CCPhysicsNode to setup Physics world. I have ...
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1answer
107 views

Scrolling effect after touch

i'm making map for a game and need to make scrolling of map, so the main thing what i need is to calculate speed and move layer after player remove finger from screen. I make it my own, but i think ...