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.
16
votes
5answers
2k views
Can I develop games for mobile platforms in C++?
I have a good grasp in C++ and C and have also experience developing AAA game using C++.
Now, I'm shamelessly thinking to dive into mobile game development either in iOS or Android. Unfortunately, I ...
12
votes
5answers
13k views
Objective-C or C++ for iOS games?
I'm pretty confident programming in Objective-C and C++, but I find Objective-C to be somewhat easier to use and more flexible and dynamic in nature.
What would be the pros and cons when using C++ ...
12
votes
5answers
2k views
Tools for generating texture atlases/sprites from source images? [closed]
Is there an industry standard file format for texture atlases?
What are the apps that take a directory of images and turns it into a texture atlas png and a text file describing what's on it?
This ...
9
votes
6answers
3k views
Very simple open source games in various languages?
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. ...
7
votes
6answers
2k views
Storing game state at exit on the iPhone with Objective-C
How would you store your game state at exit for an iPhone game written in Objective-C?
6
votes
4answers
3k views
Cocos2D collision detection against a random shape
I would like to brainstorm a few ways of handling how 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 ...
6
votes
2answers
992 views
Sending a struct containing a string over network
I'm trying to send structs as neatly sorted packets using iPhone Game Kit..
I have a struct which looks like:
typedef struct {
int coolStuff;
char playerID[100];
} MyStruct;
Then I'm using ...
6
votes
2answers
1k views
AI engine for iOS game development?
I'm looking for an AI engine for iOS game development (machine learning, path finding).
5
votes
3answers
1k views
How to achieve uniform speed of movement on a bezier curve?
I'm trying to move an image along Bezier curve. This is how I do it:
- (void)startFly
{
[self runAction:[CCSequence actions:
[CCBezierBy actionWithDuration:timeFlying bezier:[self ...
5
votes
1answer
1k views
Creating an isometric map with hexagonal tiles for iPad
I'm new to game development, so I need a little help.
I have to write down a little game which has a floor with hexagonal tiles but it must be seen in a isometric view like The Sims.
Ignoring the ...
5
votes
2answers
566 views
Best way to do buttons for an OpenGL ES iPhone game
I'm making a simple 2d game in OpenGL ES and I want to add movement buttons to it. What's the best way of going about this? In previous projects I've simply added UIButtons to the view but I hear ...
5
votes
2answers
961 views
top down game - checking, drawing enemy's line of sight area with obstacles
Examples of what i'm going to need:
I'm using cocos2d to draw a CCTMXTiledMap, on those tiles i'll have to draw the LOS cone.
How would i test if the player is within that cone, taking obstacles ...
5
votes
2answers
201 views
How to combine tap and long hold gesture recognizers?
I have a game in which the player moves around a sprite by tapping on various sections of the screen (left, right, up, down). So far, each tap moves the sprite one tile (I use a tile system for ...
5
votes
1answer
515 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...
...
4
votes
5answers
1k views
Is it worth planning to be cross-platform in mobile game development?
Disclaimer: my goal is not to use cross-platform frameworks like Unity.
I am currently planning a mobile game which I intend to first launch on iOS. However, I am wondering if it is better to write ...
4
votes
4answers
9k views
Do you know any 3D engines written in Objective-C for iOS?
In the next few weeks I will start a game for iOS, most of the action will happen in 2D but a 2D engine is not enough for our idea, therefore I'm doing a small research on available 3D engines for iOS ...
4
votes
1answer
802 views
How do I break an image into 6 or 8 pieces of different shapes?
I am working on puzzle game, where the player can select an image from iPhone photo gallery. The selected image will save in puzzle page and after 3 second wait the selected image will be broken into ...
4
votes
1answer
632 views
Cocos2D-iPhone, how does the Game Loop work in Cocos2D?
Could anyone theoretically explain how the game loop works in Cocos2D and Objective-C?
If you need me to be more specific about what I'm asking, please read on.
I've got a rudimentary understanding ...
4
votes
2answers
309 views
Aggro with Images
I have three UIImageViews. enemy1, enemy1AggroBox and mainSprite. What I want to do is when
mainSprite and enemy1AggroBox interect, I want enemy1 to start moving towards mainSprite. Basically ...
4
votes
2answers
573 views
How to design a leaderboard?
This sounds like an easy thing but when I considering the following
Many players
Some have played many games and some just started
Different type of statistics
On what information should the ...
3
votes
3answers
5k views
Can Xcode be used to create very simple games?
I am brand new to Xcode, and I am also brand new Objective-C programmer.
I was wondering if it is possible to create simple Mac games with Xcode. If it's not possible, could you recommend me some ...
3
votes
3answers
405 views
What algorithm can I use to detect simple shapes in a 4x4 matrix?
I'm working on a simple multiplayer game that receives a random 4x4 matrix from a server and extracts a shape from it.
For example:
XXOO OXOO
XXOX XXOO
XOOX and XOOO
XXXX OXXX
...
3
votes
3answers
812 views
How do I find the angle required to point to another object?
I am making an air combat game, where you can fly a ship in a 3D space. There is an opponent that flies around as well. When the opponent is not on screen, I want to display an arrow pointing in the ...
3
votes
1answer
497 views
iOS custom memory allocator
I'm about to start writing an iOS game and I'm going to use mainly C++/C for the core gameplay logic.
I really like pre-allocating everything in the game and try to avoid any dynamic allocations as ...
3
votes
4answers
239 views
What is technical specs for iOS platform for a game?
I would like to know when a contractor ask you for a technical specs for iOS platform of a game, what's the description that you should give back to him?
3
votes
1answer
278 views
Cocos2d — Check if place is free before moving (all objects)
Is there a method in Cocos2d like CGRectIntersectsRect, except instead of limiting it to one sprite, it checks for ALL objects?
3
votes
1answer
593 views
How to make a iOS plugin for Unity3d
I've passed last 2 days reading articles and book for understand how can i make a plugin for iOS in Unity. Basically i need just a demo for understand how it work. For now i've tried to make this ...
3
votes
1answer
388 views
How can I spawn monsters at random locations?
I made a little 2D shooter game for my iPhone. I want monsters to spawn at random locations.
But I don't have any clue where to start to make them spawn.
I already made the monster image and ...
3
votes
3answers
1k views
What resources are available for Mac OS game development?
Are there are any modern resources on how to develop games for Mac OS? I suppose this would include objective c, cocoa and opengl 3+.
The book Beginning Mac OS X Game Development with Cocoa looks ...
3
votes
1answer
720 views
How to use Irrlicht with Objective-C?
Irrlicht uses namespaces, a C++ feature not available in Objective-C:
/*
In the Irrlicht Engine, everything can be found in the namespace 'irr'. So if
you want to use a class of the engine, you have ...
3
votes
0answers
62 views
Rotate an image and get back to its original position - opengles glkit
I need to rotate an image in opengles GLkit and get it back to its original position in GLkit.
rotation += 5;
_modelViewMatrix = GLKMatrix4Rotate( _modelViewMatrix, GLKMathDegreesToRadians(5), 1, 0, ...
3
votes
1answer
392 views
Unusual Lighting Effects - Random Polygons Coloured
I am working on creating an object loader for use with iOS, I have managed to load the vertices, normals and face data from and OBJ file, and then place this data into arrays for reconstructing the ...
3
votes
1answer
289 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
4answers
755 views
Objective C and C++ for Game Development
I'm trying to figure out which language I should begin learning. I've only been programming for about 6 months, with languages like PHP, Java, and C#. I want to learn how to dev games, and while I ...
2
votes
2answers
144 views
How can I switch between scenarios in a text game?
I am making a text-based adventure game. How should I go about changing to another scene if the player wants to e.g. go to the house or walk down the road?
I am using Objective C, but C will work ...
2
votes
6answers
837 views
Random Position between ranges
Does anyone have a good algorithm for generating a random y position for spawning a block, which takes into account a minimum and maximum height, allowing player to to jump on the block.
Blocks will ...
2
votes
4answers
1k views
Objective-C to plain c iPhone game performance improvements
I'm testing a 2D OpenGL ES based iPhone game on both the iPhone 3G and the iPhone 4. It runs great on the iPhone 4... and pretty well on the 3G. The game state is updated at 60 Hz... and the ...
2
votes
2answers
2k views
How to implement “Flick” gesture for throwing an object in the 2D realm
I am trying to implement a FLICK gesture for throwing a ball from point A to point B on the iPhone. This is my current plan....
Using touchesBegan and touchesEnd I can find the direction I need to ...
2
votes
1answer
654 views
Drawing multiple Textures as tilemap
I am trying to draw a 2d game map and the objects on the map in a single pass.
Here is my OpenGL initialization code
// Turn off unnecessary operations
glDisable(GL_DEPTH_TEST);
...
2
votes
3answers
657 views
Objective-C or C++ of game engine header file for iOS developers?
We've developed a game engine written in C++. Now we are preparing our game engine for iOS developers.
I guess that many game developers use C++ or Objective-C for their game apps. So I think we ...
2
votes
1answer
264 views
What is wrong with my technique for transmitting server and client game state?
I'm doing a network implementation of a fast-paced game. I have a puck on bot the server and client side of the simulation. I want to update the client puck position only if they are on the same ...
2
votes
2answers
279 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.
2
votes
1answer
228 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 ...
2
votes
1answer
1k views
Objective-c Cocos2d moving a sprite
I hope someone knows how to do the following with cocos2d:
I want a sprite to move but not in a single line by using
[cocosGuy runAction: [CCMoveTo actionWithDuration:1 position:location]];
What ...
2
votes
1answer
149 views
Design leaderboard ratings for quiz games
Back in March 2011 i started the following post: How to design a leaderboard?
Now my quiz game have been out for approximately a year and sold pretty decently. I am working on to update the game ...
2
votes
1answer
133 views
How can I implement temporary effects in Objective-C?
How could I use this IBAction
-(IBAction)shield:(id)sender{
appDelegate.healthInt = 150;
}
and simply make it work for a limited time. I want to set appDelegate.healthint = 150 for about 20 ...
2
votes
1answer
340 views
GNUstep Game Development
Are there any good resources out there for game development in GNU step? I looked at some of the source code for ooLite, but that didn't really have much in Objective-C.
What is there these days?
2
votes
0answers
73 views
Difference between multiple AudioUnits and one AudioGraph with a MultiChannelMixer
I'm porting my game to iOS using MonoTouch, and I'm having some trouble getting sound output to work. SystemSound/AVAudioPlayer is way too simple for my needs (I need looping and multiple simultaneous ...
2
votes
2answers
468 views
Issue with removing sprites on collision
I'm trying to make a very simple collision detection procedure just for test purposes.
The problem is with the send/receive information between functions
I have these lines on the update method ...
2
votes
3answers
467 views
How do you maintain content size vs. content quality in a mobile application?
I am developing my first Cocos2d iPhone/iPad game that includes quite a few sprites, I would need approximately 80 different. As this is for both normal and HD displays I have 2x of each sprite. I am ...
