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

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2
votes
1answer
408 views

cocos2d/OpenGL multitexturing problem

I've got a simple shader to test multitextureing the problem is both samplers are using same image as their reference. the shader code is basically just this : vec4 mid = ...
1
vote
2answers
190 views

Crash due to removal of Elements like CCSprite from NSMutableArray

So, here's how it goes. I am currently working on Cocos2d game, which consists of many Obstacles. One obstacle gets added on the screen at an interval of 10 seconds like this. ObstacleSprite* ...
12
votes
5answers
911 views

tunnel effect cocos2d

I am looking to create a similar tunnel effect in COCOS2D (iOS). Could anyone suggest any pointers? ref Video 1 ref Video 2 Till now I have tried with several ring shape sprites with decreasing ...
-2
votes
1answer
310 views

How to fly enemies like galaxian game enemies?

I am developing game like galaxian and using cocos2d with box2d .I don't have idea how to create enemies like galaxian game enemies and how do they fly over the screen. ...
3
votes
2answers
365 views

Separating UI and logic in Objective-C at iOS based Games

How to separate UI and logic in Objective-C based mobile games? To develop games, I use Cocos2d library. I need a good reference to separate my UI code from game logic code.
0
votes
1answer
109 views

using lua in kobold2d to control parameters

Is there a tutorial on using LUA in Kobold2d? I want to know if its possible to use it to control the game behavior (like max speed decrease of timer, and bonus points) by uploading a new script to ...
2
votes
1answer
706 views

How to get all child with same tag from CCLayer?

Actually i am working with cocos2d Game. I am using CCLayer for particular scene. now there are so many buttons means CCMenuitems are available. I want to disable that all menuitems having same tags.
7
votes
2answers
796 views

What is the correct way to implement hit detection with non-rectangular sprites?

What is the correct way to implement hit or touch detection for non-rectangular sprites in Cocos2d? I am working on a jigsaw puzzle, so our sprites have some strange forms (jigsaw puzzle bricks). As ...
1
vote
1answer
1k views

use of undeclared identifier 'GL_TEXTURE_COORD_ARRAY'

Anyone please help me .i am working on sneakyjoystick class when i import these class some error are identified they are following :- use of undeclared identifier 'GL_TEXTURE_COORD_ARRAY' use of ...
-3
votes
1answer
429 views

My Sprite comes out the screen

If i an action moves the sprite,how can i keep the CCSprite on the screen???? this is my code: [enemy runAction:[CCSequence actions:[CCMoveBy actionWithDuration:2.0 position:ccp(-winSize.width*0.4, ...
1
vote
1answer
498 views

Unit Testing with Cocos2D

How to implement Unit Testing with Cocos2D framework? What are the good practices? Is there any testing framework like JUnit Framework at Eclipse for Android?
3
votes
1answer
234 views

Cocos2D Command-Line Application

Is it possible to create a terminal application which uses cocos2d? I've tried to make one using cocos2d 2.x, but it requires a MacGLView to be initialized. I need it so that I could program a ...
2
votes
1answer
286 views

Wheel rotation, to change velocity of vehicle

I update the velocity of my vehicle like so: [v setVelocity: ((2 * 3.14 * 100 * (wheel.getRotationValue / 360) / 30)) * gameSpeed]; // update on 60 fps this gets velocity on all frames divide by 60 ...
0
votes
1answer
511 views

EXC_BAD_ACCESS error when box2d joint is destroyed

When I destroy the weldJoint in the update method (see below) I get an EXC_BAD_ACCESS error pointing to the line world->DestroyJoint(weldJoint); in the update method below: -(void) update: ...
1
vote
1answer
3k 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 ...
-2
votes
1answer
794 views

Cocos2D game engine javascript is too slow on mobile

i developed a game using cocos2D javascript that works fine on web browsers but when i run it on mobile ( iPhone 4s , android nexus) the FPS was dropped to 20 - 22 on iPhone (max) how to optimize it ...
-1
votes
1answer
326 views

Help with Music Rhythm Game (Cocos2D)

I'm basically new to the whole idea of Cocos2d.. i am aware of CocosDhension.. however, i still cant get the idea of working around it.. My idea, i would like to try to create something like "Tap ...
1
vote
3answers
1k 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 ...
3
votes
2answers
1k views

How to achieve smooth gameplay in a physics based multiplayer game? (2d)

I'm using cocos2d 2.0 and Gamekit for networking. I've got a server/client model. It works over wifi (local) and bluetooth. (Xcode 4.3, Objective C) Basically, there's a ball and 2 or more players. ...
-2
votes
1answer
943 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.
0
votes
1answer
285 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 = ...
0
votes
2answers
159 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
votes
1answer
180 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 ...
0
votes
1answer
335 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
2
votes
1answer
352 views

Which data structure should I use for dynamically generated platforms?

I'm creating a platform type of game with various types of platforms. Platforms that move, shake, rotate, etc. Multiple types and multiple of each type can be on the screen at once. The platforms will ...
4
votes
1answer
448 views

Cocos2d: Tongue effect like in Munch Time

I'm wanting to do a tongue effect for my character like the one in Munch Time( shown in pic ). The player does some action and his tongue attaches to the nearest platform. I'm thinking this is ...
1
vote
1answer
286 views

Adjust sprite bounds of the visible part of texture

Is there any way to adjust the boundaries of the visible part of the sprite? To make it easier to understand: I have a texture, such as shown at figure 1. Then I break it into pieces and fill the ...
3
votes
1answer
2k 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
374 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 ...
1
vote
2answers
600 views

Using two joysticks in Cocos2D

Here is what I am trying to do: With the left joystick the player can steer the figure and with the right joystick it can attack. Problem is that the left joystick seems to get all the input, the ...
0
votes
1answer
208 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 ...
0
votes
2answers
1k 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.
0
votes
1answer
599 views

Cocos2D: Change animation based on joystick direction

I'm trying to get my figure to look in the right directions, based on the input of the joystick. So if I tilt left it looks left and the left animation is used, if I used right, it looks right and ...
0
votes
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
355 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 ...
-1
votes
1answer
152 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?
0
votes
1answer
863 views

Shaders in Cocos2d 2.0

I'm thinking of using cocos2d 2.0 for my next project and am wanting to know if it's possible to have a shader that renders to a texture and that texture be input into another shader? I have a few ...
1
vote
1answer
461 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 ...
1
vote
1answer
1k views

How to animate the sprite along with action in Cocos2d?

Cocos2d-android - I have an animation which has 5 Frames they are close cropped images. Now I want Sprite to do animation as well as Move in X direction.i.e. I have a player running which gets ...
1
vote
2answers
515 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
1
vote
1answer
503 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 ...
2
votes
1answer
380 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 ...
6
votes
1answer
567 views

Puzzle game: clipping of non-convex polygons on the figures

I have an original figure in the SVG file. I need to break it randomly on parts, an example of which is specified below: I have an idea, to use for partitioning Voronoi diagram (Fortune's algorithm). ...
-3
votes
1answer
177 views

Simple question about a cocos2d based game template

I am learning a cocos2d based Game template tutorial from here and now I am at this point of the tutorial. My question is, how can i run 30 different scenes in 30 different levels of 5 chapter? Now I ...
4
votes
1answer
431 views

Organize a game set

I'm developing a endless running game and I'm not really sure on how to make the set. The first approach was to make a BIG set like 10240x3072 pixels so that we have a nice portion of set. After ...
0
votes
1answer
450 views

what is the difference between CCSprite and a PhysicsSprite?

I am new to Cocos2D and I've realized that most of the codes written before the Cocos2d update used CCSprites. Recently I realized a lot of more recent codes after the update are using PhysicsSprite. ...
-4
votes
1answer
389 views

“Null Pointer Exception” Animating sprite in cocos2d android [closed]

I am converting this monkey jump game tutorial in android. I have done til monkey sliding right to left and left to right but I am stuck in the part of monkey walking animation. I have tried but ...
1
vote
0answers
225 views

Cocos2D and iPhone's accelerometer

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 ...
0
votes
1answer
424 views

How do I manage the visibility of enemy spawn locations in a long scrolling shooter?

How do I handle the situation of an enemy spawn place being visible on a screen in a scrolling shooter? The tutorials I have seen are about setting all the enemies on a whole map only. But it is not ...
1
vote
2answers
612 views

CCSpriteFrameCache: Frame '%s' not found

I have just started using the Cocos2D library for Android. I am trying to make a walking bear animation. For that I am using a CCSpriteFrameCache, but I'm getting a "frame not found" error in the ...