cocos2d is a free open-source framework for building 2D games, demos, and other graphical/interactive applications.

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Get Facebook Picture in Cocos2d-iphone V3

I'm trying to get the profile picture from Facebook, but I'm getting the following error: Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIImage ...
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1answer
70 views

Clay Jam continuous path/tap

I saw this game Clay Jam, that the user can create a path in the sand. The path is a continuous one, and it can varies from a single point to curves. How one can develop smooth and continuous paths? ...
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2answers
490 views

How can I locate the frames of a spritesheet PNG based on this PLIST data?

Someone asked me to reskin a certain game. Now he only sent me the whole sprite PNG and PLIST files of the sprites. He instructed me to rename each sprite with the same name corresponding to each ...
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1answer
176 views

Do SpriteBuilder's Smart Sprite Sheet need to be loaded to memory?

When I create an Smart Sprite Sheet Folder using SpriteBuilder and publish it, must I load that SpriteSheet into memory "FrameCache" with code or does SpriteBuilder do this automatically (so I just ...
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2answers
160 views

Finding diagonal objects of an object in 3d space

Using Unity3d, I have a array which is having 8 GameObjects in grid and one object (which is already known) is in center like this where K is already known object. All objects are equidistant from ...
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1answer
184 views

Particle effect in sprite

I want to create a particle effect when my player sprite collide with my star sprite. How can I add a particleSystem in the sprite and not in a image? Also, I wish if it could wait for the animation ...
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1answer
114 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 ...
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0answers
60 views

Building a guided tracing scene

I'm trying to figure out an approach to creating a cocos2d scene that would help kiddos learn to draw letters of the alphabet. Right now I am just using Apple’s PaintView demo code and applying an ...
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1answer
154 views

How to swap the position of two sprites? [closed]

I'm making a game like Candy Crush with Cocos2D in Android. I've made the sprites but I want to swap to sprites by touch . How to swap the position of two sprites?
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1answer
238 views

Dynamic Hills like Contre Jour in Cocos2d

I'm interested in maps/environments which are flexible and change at runtime, such as those in Contre Jour. I have looked for a long time to find out how to make this effect, but I couldn't find an ...
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1answer
154 views

Walking Sprite animation Cocos2D [closed]

I am new to cocos2D development. Basically I want to develop game in which i want to move sprite forward with walking kind animation, must look real. Any help will be appreciated.
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1answer
180 views

How set and count Angle of sprite (turret) object in portrait mode in cocos2d?

I am new in cocos2d.I follow Raywenderlich tutorial series. I wish to set turrets in below of the screen in portrait mode.when user touch that location fire bullet and turret fire position at the ...
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307 views

Cocos2D - Simulating infinite scrolling

I have a BIG problem!! I want to make something like old space shooter games like “Asteroids”, where the ship, when going out of the screen, is reappearing at the other side. For example, when the ...
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1answer
85 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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3answers
462 views

How can I create a tile set that will allow me to render a soccer pitch in perspective?

I am making a soccer game that needs a large pitch image (the whole play field area is about 3300 * 1200 pixels). I know I should use the Tiled map editor to create a tile map so that I can create ...
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2answers
696 views

What is the standard way to synchronize sound effects with sprite animations?

Let's take a situation where you have an RPG with spells and each spell animations have a different number of frames and they have very different requirements for sound effects. Let's assume that each ...
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1answer
140 views

Collision function calls before colliding

My Box2D contact listener class is calling post solve and beginning the contact function before colliding? This is causing my object to bounce back before hitting the ground. What could be causing ...
4
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1answer
83 views

Can I create cocos2d animations without using Xcode?

I need to have someone do animation work for an iOS game I'm developing (using cocos2d), however this person does not have a Mac and as such cannot run Xcode. Is there a way for them to create ...
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1answer
446 views

cocos2dx- set draw() method interval time

What is the default interval of draw method call in cocos2dx engine? Can we set it manually? I couldn't find much information about it online. After researching a bit I found that update() method ...
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0answers
893 views

Cocos2dx- Draw primitives(polygons) on Update

In my game I'm trying to draw polygons on on each step i.e. update method. I call draw() method to draw new polygon with dynamic vertices. Following is my code: void HelloWorld::draw () { ...
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0answers
503 views

Cocos2d-x CCFollow Zooming issue

Hi I am currently building a cocos2d-x game which incorporates pinch zoom using CCLayerPanZoom class which can be found here The problem is basically when using CCFollow and zooming and out, it ...
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1answer
227 views

How can I set a system's emission rate using Particle Designer 2.0?

In cocos2d-iphone (2.1), CCParticleSystem has a property called emissionRate. Is there any way to set it using Particle Designer 2.0? I've tried all the various settings but there doesn't seem to be ...
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1answer
548 views

how to predict enemy postion to shoot bullet same kingdom rush

i'm doing a tower defense game same kingdom rush, enemy can run curve not only linearly. i found this link : 2D tower defense - A bullet to an enemy but this link use only for enemy run linearly. ...
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1answer
325 views

Tile Maps and vertexZ order for sprites

Here is the setup. I have a orthogonal tile map made with Tiled. There are 5 layers. The bottom 4 comprise the background, while the top layer is the foreground that I will refer to as the “tree” ...
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1answer
420 views

cocos2d collision detection between two ccsprites i am using boundingBox but this method is not working [closed]

I am making a cocos2d side scroller and I am currently putting collision detection in. I have an enemy that shoots at the player. I want to have the bullets disappear when they hit the player. The ...
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2answers
117 views

How to define axis of Sprites in a CCAnimation?

I'm struggling to find how to define a kind of axis in my frames, when my sprite punches it moves back. I want to define the head as a pivot for the other sprites with different sizes. How can I ...
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1answer
1k views

Pixel Perfect Collision Detection in Cocos2dx

I am trying to port the pixel perfect collision detection in Cocos2d-x the original version was made for Cocos2D and can be found here: ...
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0answers
207 views

Using fully cropped sprites with TexturePacker and Cocos2d

When using texturepacker, you can set your trim-mode to crop. This is nice, because when a sprite loads in cocos2d your bounding box will only be the visible area of your sprite - which is useful for ...
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2answers
280 views

Box2d : How to apply a force to keep swinging from left to right?

i'm losing myself in this... Situation: Working on a game in cocos2d with box2d and I have a ropejoint between one fixed body and one dynamic body. When I drop the dynamic body is swings from left ...
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1answer
465 views

Converting data file of Sprite Atlas from JSON to Cocos 2D

I have an existing Sprite Atlas with its data file in JSON format. How do I convert it for use with Cocos 2D and other frameworks ? I tried poking around in Texture Packer which supports publishing ...
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1answer
377 views

How to get position of CCSprite added to CCParallaxNode?

I have a CCparallaxNodeExtras that scrolls infinite (following the space game tutorial). I added as a child a CCSprite made of other CCSprite, like this: _backgroundNode = ...
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1answer
185 views

How do you align the edges of sprites?

If you have SpriteA and SpriteB. SpriteB is a child of SpriteA. Does anyone have a mechanism to come up with the left, right, top, side of a boundingbox() of SpriteA? What I'd like to do is align ...
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196 views

How do I find the rotation point given a touch anchor, new position and new rotation?

I've got an Cocos2d layer which anchorPoint, position and rotation (according to http://www.qcmat.com/understanding-anchorpoint-in-cocos2d/) vary when the pinch zoom gestures. Everything works fine. ...
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1answer
816 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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0answers
165 views

UITapGestureRecognizer fast tapping not working [closed]

I have initialized UITapGesture as follows: tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)]; tapGestureRecognizer.numberOfTapsRequired = ...
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1answer
85 views

Display CCSprites with a delay

I am a beginner in cocos2d and I wanted to display coin CCSprites as soon as it moves off the screen with a 5 second delay. So this is what I wrote in my main gameplay layer to add 7 coins in a row: ...
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1answer
330 views

How to Initilize CCPoint Array from String?

I've got string like this: {{0,168},{20,20}}, here indicates two points. I want to get them out to initialize my CCPoint. Do you guys know how to convert this?
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0answers
268 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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1answer
300 views

cocos2d ccTouchEnded: Removing a Touch

These are my ccTouch__ methods. Note that I am using the singular form of the functions (ie. ccTouchBegan v. ccTouchesBegan (don't know if that has anything to do with it, but it can't hurt to point ...
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0answers
186 views

Using CAShaperLayer within COCOS2d

My class X is interited from CCLayer. @interface X : CCLayer Then in X, I added an instance variable of type CAShapeLayer. CAShapeLayer *_Circle I drew the Circle using UIBezierPath. Now if I try ...
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1answer
266 views

Cocos2D SpriteBatchNode vrs. SpriteFrameCache… I do not see any performance difference

I have tried using both ways... adding the .png file on the cache with SpriteFrameCache.. adding .plist with spritebatchnode adding the correspoding .png file, I didnt see any performance ...
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1answer
162 views

Cocos2D: Box2D body that is movable by one type of object but not another

I'm in the process of creating a simple platform game using Cocos2D 2.0 and Box2D. I'm trying to create a kind of crate object that cannot be moved by the player, but that can be moved by an elephant ...
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1answer
168 views

Determining explosion radius damage - Circle to Rectangle 2D

One of the Cocos2D games I am working on has circular explosion effects. These explosion effects need to deal a percentage of their set maximum damage to all game characters (represented by ...
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1answer
137 views

Why are my sprite sheet's frames not visible in Cocos Builder?

I have created a sprite sheet with zwoptex. Then I just dragged the .plist and .png files to my Cocos Builder project. After this I wanted to take a sprite frame and set it to a sprite: But the ...
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1answer
560 views

How to create a rectangle shape in cocos2d-android

I am new to cocos2d-android. I want to create a rectangle shape in the scene .for that i am trying to do something like this. CGRect rect = CGRect.make(x,y,70,70); But it was not displaying the ...
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2answers
288 views

Cocos2d sprite's parent not reflecting true scale value

I am encountering issues with determining a CCSprite's parent node's scale value. In my game I have a class that extends CCLayer and scales itself based on game triggers. Certain child sprites of ...
2
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1answer
3k views

Setting Higher Z-Index for Sprite

For my game, I have to set highest z index for my sprite. At present, I wrote following code but didn't work for me. Sprite houseSprite = new Sprite(pX, pY, ...
6
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1answer
274 views

Best way to determine surface normal for a group of pixels?

One of my current endeavors is creating a 2D destructible terrain engine for iOS Cocos2D (See https://github.com/crebstar/PWNDestructibleTerrain ). It is in an infant stages no doubt, but I have made ...
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1answer
339 views

Sprite sheet resolutions and Tile Maps

I am making a game using Cocos2d-x and want to support multiple mobile phone resolutions and sizes. Right now I have made my game sprite sheets set on a resolution of iPad Retina's resolution of ...
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2answers
181 views

Serious gameplay issue by spawning enemies according to elapsed time

EDIT: I have changed the title as I think that this is a general gamedevelopment question but, on a technical note, I am using Cocos2d v2.0 Some time ago I had asked a question on which was the most ...