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

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1answer
2k views

What is the correct way of changing image of existing CCSprite?

How do I correctly change sprite to show another image? Or to have another texture? This is the way I do it now. When I need to change sprite image I increase state variable. So i have one picture for ...
2
votes
1answer
816 views

CCsprite.flipX not working!

Here is my function, it makes random point on the ground and makes my sprite go there. If the x position of location is less then position of my sprite, I flip my sprite so it looked left (it looks ...
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4answers
3k views

How to separate my rendering from game loop?

If I have a (complex) operation that takes a long time for it to finish, for instance, a couple of seconds, my frame rate drops far below the acceptable. How could I still implement it while it is not ...
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2answers
1k views

Cocos2d v2.0 and OpenGL 2.0/1.0: where to start

I started developing my very first game 3 months ago using Cocos2d 2.0 for iPhone. I am now in the stage where I'd like to add some cool effects to the bullets and some special weapons (see my ...
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1answer
196 views

How to use generic level editors with my arbitary code?

I have a game, breakout clone. It has a Block class that contains CCSprite as a property. Usually I made levels by manually setting those blocks to positions. Here comes the question, how do I use ...
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1answer
540 views

Cocos2d: Using single timer/scheduler for multiple sprites

want to know if is it possible to use single timer or scheduler method for multiple sprites ? Like I am now working on a game and there could be any number of sprites and i want to perform some ...
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0answers
353 views

Box2d based tile map game scrolling problem [closed]

I am using a tile based game and also used a joystick. Using joystick sprite body move perfectly but tile map can not scroll. -(void)setCenterOfScreen:(b2Vec2)position { int ...
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2answers
689 views

Creating 2D waveform for Cocos2d game

I'd like to have a Waveform in my iPhone game that I am developing using Cocos2d v2.0. That's the ideal wave I'd like to achieve. A simpler wave which I would still be happy with is this one. ...
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1answer
6k views

Accelerometer to move player left and right

Please take a look on my code and help me to find problem. I used this tutorial: COCOS2D_ACCELEROMETER_MOVEMENT This works only sometime….some time not move..How can I resolve this problem? Here is ...
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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 ...
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1answer
716 views

Cocos2d Box2d contact listener call different method in collided object

I have the building object, wen it hit with other, i want to call some method inside it. Building.mm -(void)printTest { NSLog(@"printTest method work correctly"); } in my ContactListener i ...
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2answers
1k views

Using pixel art on small high resolution screens

I'm making a game and I would like to utilize pixel art as my style. But I faced a problem, modern displays on my target platform (iOS) have extremely high resolution. So if my artist makes me some ...
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1answer
609 views

How make a laser path prediction line like a “slingshot cowboy” game?

How so I make a laser path prediction line like a “slingshot cowboy” game in cocos2d or box2d and select the target like "slingshot cowboy" game.
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1answer
468 views

How to store level information on iOS

Let's imagine I have a breakout game. I make a level like this: For columns < max columns For rows < max rows Create sprite from file, put it on some position based on ...
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0answers
269 views

Getting contour without the background [closed]

I have a texture and vertex which are needed to create a set of closed polygons. For this purpose I use these functions: Code for create texture: CCSprite* spr = ...
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1answer
322 views

How do I identify a collision with a specific body?

How can I identify when the ground body collides with another b2Body? I can use b2ContactListener to be notified of collision events, but how do I tell which bodies collided?
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2answers
430 views

Good open source iOS games? [closed]

I would like to see how things are done in modern iOS games, I am especially interested in Cocos2D games. I need a game that will compile (warnings are ok) and since most of the project I have seen ...
1
vote
1answer
230 views

Touch area double sized on newer device

I am developing a universal puzzle game, in which I have used separate image for iPhone4 and for iPhone3, iPhone4 image is double in size of iPhone3 image. My issue is for iPhone4, touch area of image ...
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votes
1answer
215 views

How to begin stylising a game [closed]

I'm currently in the late stages of development for a platform-esque iPhone game and am beginning to look into the graphics. Being a developer through-and-through, I have limited design skills and my ...
1
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1answer
129 views

Why is the MaskBit maxed out

Hi there for some reason the maskbit of my b2FixtureDef is being maxxed out and im not sure why Here is the declaration of the items that are used in the game enum PhysicBits { PB_NONE = 0x0000, ...
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3answers
2k views

Moving camera in large view

In my cocos2d app I was wondering how to make a CCSprite move on the screen but have the screen focused on the CCSprite, so when the sprite moves the view moves with the CCSprite. Is there a tutorial ...
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1answer
1k views

Rolling a 3d die in cocos2d

How can I have a 6 sided die in my cocos2d game and when the device is shaked the die rolls and shows a number? I would also use UIKit if it was necessary.
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1answer
354 views

Touching a CGRect

In my cocos2d app I am trying to determine when a CCSprite is touched Here is what I have: -(BOOL)ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event{ NSMutableArray *targetsToDelete = ...
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2answers
174 views

Falling images that can be pressed

In my cocos2d app I am trying to make images fall from the top of the screen and detect when they are pressed. I am having a hard time. Can anyone help me achieve this? Thanks.
2
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1answer
203 views

Game speed cubic growth

Is it possible, using delta in my update method to increase a game speed variable exponentially on cubic growth (the blue line below) My maths isn't great so I'm not sure how the formula would be ...
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1answer
698 views

Keeping the CCSprite on the screen

In my cocos2d app I have a CCSprite moving on the screen but it moves off the screen. How can I prevent the CCSprite from moving off the screen? Thanks
3
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2answers
2k views

Cocos2D: Upgrading from OpenGL ES 1.1 to 2.0

I have recently starting upgrading my ios game to the latest Cocos2D (2.0 rc), and I am having some difficulties upgrading my texture generation code to OpenGL 2.0. In the old version I generated ...
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2answers
315 views

How can I make a rectangle to an irregular shape?

I used masking for breaking an image into the below pattern. Now that it's broken into different pieces I need to make a rectangle of each piece. I need to drag the broken pieces and adjust to the ...
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vote
1answer
180 views

Drawing texture does not work anymore with a small amount of triangles

When i draw lines, the vertices are well connected. But when i draw the texture inside the triangles, it only works with i<4 in the for loop, otherwise with i<5 for example, there is a ...
2
votes
5answers
2k views

Cocos 2D - Hold down CCMenuItem

I am using the following code to move a CCSprite left and right. -(id)init{ CCMenuItemImage * moveLeftButton = [CCMenuItemImage itemFromNormalImage:@"Move Left Button.png" selectedImage:@"Move ...
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1answer
3k views

Cocos2D 2.0 - masking a sprite

I have read this tutorial about how to mask sprites using Cocos2D 2.0. http://www.raywenderlich.com/4428/how-to-mask-a-sprite-with-cocos2d-2-0 But the author talks about OpenGL ES textures and ...
3
votes
1answer
536 views

Smoothing rotation

I've spent the last three days trying to work out how to rotate a sprite smoothly depending on the velocity.x value of the sprite. I'm using this: float Proportion = 9.5; float maxDiff = 200; float ...
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1answer
226 views

Rotation based on x coordinate and x velocity?

-(void) accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration { float deceleration = 0.3f, sensitivity = 8.0f, maxVelocity = 150; // adjust velocity based on ...
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2answers
2k views

Top down water view, cocos2d

Has anyone successfully created a top down view of a stream/river? I need to also work out how to make it look like a boat is cutting through the water.
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0answers
258 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 ...
2
votes
1answer
690 views

Xcode workspace with Unity3D as a sub-project?

Let's say we're developing a 2D game with Cocos2d-iPhone and UIKit and CoreAnimation. But we're also considering leveraging the 3D capabilities of Unity 3D. Is it possible that we add the ...
2
votes
2answers
1k views

Simple 2D Flight Physics with Box2D

I'm trying to build a simple side scroller with an airplane being the player. As such, I want to build simple flight controls with simple but realistic-feeling physics. I'm making use of cocos2D and ...
0
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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 ...
2
votes
1answer
390 views

Image 1 becomes image 2 with sliding effect from left to right?

I would like to show a second image appearing while a "door" is closing on my character. I've got my character in the middle of the screen and a door coming from the left. When the door passes my ...
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1answer
168 views

iPhone game development [closed]

I am new to the iPhone game development. How can I develop a simple game by using cocoa2D. and I want to know more about Cocoa2D.
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1answer
166 views

Make a CCSprite come up from bottom of the screen in intervals

I have a cocos2d iOS app. I have a CCSprite that I need to come up from the bottom of the screen every few seconds (like 2 or 3 seconds). How would I do this?
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votes
1answer
199 views

Slide down transparent CCScene

I want a transparent CCScene (or CCLayer) to slide down when the game is paused...and I want it to be clear enough to see the CCLayer behind it. How could I do this? Thanks
1
vote
1answer
509 views

Store and create game objects at positions along terrain

I have a circular character that rolls down terrain like that shown in the picture below. The terrain is created from an array holding 1000 points. The ground is drawn one screen width infront and ...
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2answers
707 views

Custom Fonts in cocos2d

I have tried Hiero but it has NEVER worked for me. Is there an alternative application for creating fonts for cocos2d? Thanks
3
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1answer
2k views

How To show document directory save image in thumbnail in cocos2d class [closed]

I have just implemented multiple photo selection from iphone photo library and i am saving all selected photo in document directory every time as a array, now i want to show all saved images in my ...
2
votes
2answers
254 views

Moving 2d camera in the y direction

I'm developing a simple game for the iphone and am struggling to work out the best way for the camera to follow the main character. The following picture hightlights the three main components: ...
2
votes
1answer
505 views

How can I load a large tile map with cocos2d?

I am try to design a cocos2d game with a big world. The world's tile map is very big, maybe 20 iPad screen sizes worth of tiles. I want to know how to load this using a CCTMXTiledMap? If I directly ...
1
vote
1answer
864 views

Running one action on multiple sprites simultaneously

I have created a spiraling animation for a football. I want to be able to run it on 2 sprites simultaneously. This is what I have done: CCAnimation* footballAnim = [CCAnimation ...
0
votes
1answer
442 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, ...
2
votes
1answer
539 views

Cocos2d particle system

I have a fire particle emitter in my project and I have it following a football. My goal is to make the football look like it is on fire but the problem is when I add it to the screen it can only be ...