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.

learn more… | top users | synonyms

3
votes
1answer
372 views

Bullet physics weird behavior. Jittering and drifting with btBoxShape

I'm dropping a simple box onto a plane from 100 units and my solution using Bullet Physics is giving me some weird behavior. The dimensions of the box are {2, 4, 1}. When the box hits the ground it ...
0
votes
1answer
169 views

Error running an Action in Cocos2d-x

In my game I have a "rocket" type and I want to run a sequence of actions on it. At first it must run an explosion animation and then remove itself from the game. For this I used the following code, ...
0
votes
1answer
116 views

Understanding CGPoints in SpriteKit

I am planning to place three cards on a view which I add to the background. However I wanted to combine two of the cards and replace the first card position with the new card position. Is there any ...
0
votes
1answer
285 views

cocos2d + sneakyinput joystick multitouch problem

I've added a joystick to my iOS game using the latest SneakyInput joystick code for cocos2d v3. It works well, but when a CCButton I have is pressed, the joystick touch event ends. Based on my ...
0
votes
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 ...
1
vote
1answer
24 views

Run some objc code very early in unity iOS game lifetime

I want to hook up a crash reporting service to my unity iOS game. It's just one line of objC to add, as early into the app lifecycle as possible, but I'm not sure how to get it to run. I know I could ...
9
votes
4answers
4k views

In Cocos2D, how do I check for collisions against an arbitrary user-drawn shape?

I want to detect a collision between a sprite and a user-generated shape of some sort. For example. There are 3 objects on the screen. The user takes their finger and draws an abnormal shape around 2 ...
0
votes
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 ...
0
votes
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 ...
0
votes
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. ...
1
vote
1answer
179 views

iOS Facebook SDK, Games Start Playing post

im trying to implement a method in my native iOS game the publish a story on face book such as this photo most games that is integrated with facebook share stories like this in the activity section ...
1
vote
1answer
290 views

Spritekit water flowing [closed]

I'm wondering if there is a way in spritekit to implement water flowing through a path? like this water flow Right now I'm generating the path using UIBezierPath and PaintCode Any suggestion? ...
5
votes
1answer
230 views

Does SpriteKit follow the MVC pattern?

I am currently working on an iOS project called Old Frank that I have been trying to follow a MVC design pattern. The gist of it is. GameObjects(model) <- Scene(controller) -> Sprites "SpriteKit" ...
1
vote
3answers
121 views

Finding neighboring coordinates on offset tile map

I have a grid of hexagonal tiles. Every other row is slightly offset for visual reasons. Imagine a player touches any tile - I need to compare the coordinate of that tile, with any tile they touch ...
-1
votes
1answer
3k views

How change the size of sprite in cocos2d?

I want to change the scale of sprite like a paper in 'Paper Toss' game. 'Paper Toss' is the game is available on the App store. I want to make a sprite like a paper and change the scale of sprite ...
1
vote
0answers
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 ...
3
votes
3answers
288 views

How to approach 360 degree snake without having it “slide”

There's a great question here that helps me a little bit in what I want to do, and it explains it quite well: How To Approach 360 Degree Snake Basically, I want to have a smooth 360-degrees Snake ...
0
votes
0answers
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 = ...
1
vote
3answers
2k views

Detecting End of Animation

So I am making a death animation for a game. enemy1 is a UIImageView, and what I'm doing is when an integer is less than or equal to zero, it calls this deathAnimation which only happens once. What I ...
0
votes
0answers
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 ...
7
votes
7answers
5k views

Very simple open source games in various languages? [closed]

Are there any very simple open source games available just to demonstrate the basics of the programming techniques? Preferably something which fits in to a couple hundred lines of actual code. ...
0
votes
0answers
90 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 ...
1
vote
0answers
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 ...
0
votes
0answers
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 ...
1
vote
6answers
4k views

Snake game logic

So I'm thinking about making snake game. I started thinking about it. I figured out almost everything, but I have found one fundamental problem I can not fix myself and I need your help. The logic ...
1
vote
1answer
250 views

Changing location after CommitAnimations

I'm using the following code to move a UIImageView: shootImg.image = [UIImage imageNamed:@"Projectile Left 1.png"]; [UIView beginAnimations:nil context:nil]; shootImg.center = ...
2
votes
1answer
115 views

How can I test if an oriented rectangle contains another oriented rectangle?

I have the following situation: To detect whether is the red rectangle is inside orange area I use this function: - (BOOL)isTile:(CGPoint)tile insideCustomAreaMin:(CGPoint)min max:(CGPoint)max { ...
1
vote
1answer
296 views

How should I structure my code to add enemies?

So I am currently making a 1942-style game in Sprite Kit. I've reached the point where I am finished implementing pretty much everything (movement, shooting (also recognizing a hit and exploding an ...
0
votes
0answers
63 views

CCTextField won't appear

I can't seem to add a CCTextField in my physics node, I tried all different methods, but it's still not happening. Here's my code: CCTextField *tf = [[CCTextField alloc] init]; tf.contentSize = ...
1
vote
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 ...
1
vote
1answer
109 views

Manually remove inactive CCParticleSystem from scene?

When using particle systems that have a lifetime, with CCParticleSystem and its derived classes, should I manually remove the finished systems from their parent nodes once the particle animations are ...
0
votes
1answer
551 views

I need some help with stopping individual sound effects in OALSimpleAudio

I'm trying to find out how to stop a specific sound effect rather than having to stop all of them. I'm using OALSimpleAudio. I can't seem to find how to do it. simple google searches result in ...
1
vote
1answer
963 views

Spritebuilder and CCScrollView, page indicators not showing up?

I'm using Spritebuilder to make my game, and CCScrollView usually saves me quite a bit of time. I'm trying to implement the scroll view much in the same way as the home screen on an iphone uses the ...
5
votes
1answer
194 views

How can I implement Objective-C libraries in Unity?

I've been a "hardcore" developer for sometime now, as I've always worked with pure code reactive rendering, and contributed to Cocos2d library some time ago , (It is the one I used for my games) . But ...
0
votes
1answer
253 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 ...
0
votes
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 ...
1
vote
1answer
971 views

Preload in cocos2d v3

I'm trying to create a preload, but i don't know how to implement the code of this topic in cocos2d iphone v3. Since CCTextureCache has changed to CCTexture, and doesn't have sharedTextureCache ...
0
votes
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', ...
0
votes
1answer
110 views

Box2d stopping the movement of an object

I am in the process of making a game and I need an object to move only when the buttons are pressed. I have a method that begins the movement, and so far I am ending the movement of an object by ...
1
vote
0answers
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 ...
-4
votes
1answer
115 views

How can I develop a game for iOS? [closed]

I have a Mac arriving in the next few weeks, and plan to program a 2d game. I know a little bit of Java but nothing about Objective C. I've heard about cocos2d -- it seems good but I don't know ...
0
votes
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?
0
votes
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 ...
1
vote
1answer
191 views

How to centralize stat/feat/equipment related changes in an RPG?

I have a game with an RPG system where derived stats, like HP,armor, etc depend on a variety of components: armor, stats and feats. I'm running into an issue where the code to change derived metrics ...
2
votes
0answers
38 views

How to implement a property with a base value and a changed value? [duplicate]

I have a number of stats and effects in game that are subject to change, they have some kind of base value and the current value. For stats, I implemented this in a dynamic way, but for less important ...
2
votes
2answers
157 views

Architecture - how to refer to skills/abilities internally within code?

I have about 60 skills within my game, which are loaded from a JSON file. Each skill is a subclass of a skill object and has attributes like range, cost, target type, etc. Currently each skill has an ...
5
votes
1answer
1k views

OpenGL blending (masking)

I need some help with OpenGL textures masking. I have it working but need to find some other blending function parameters to work in other way. Now I have: //Background ...code... ...
1
vote
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 ...
0
votes
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. ...
2
votes
2answers
2k views

Detecting right/left collisions with a bounding box

I'm building a platformer in cocos2d, my first game project. I'm working on movement and collision detection. I'm using a tilemap with a "meta" layer of invisible blocks that are designated ...