Spacefight – Game finished – Part 12
The game is finally complete! You can find it under the download section on this blog, if you want to try it out. You can also look it up on Bitbucket. I’m quite happy how it turned out. I have …
Tag: Spacefight
Spacefight – Building and distributing the game – Part 11
The game starts to look complete and I am getting ready to build versions of the game, for the platforms I initially had in mind which are Linux, Windows and Mac OSX. Building for Windows First off I hoped I …
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Spacefight – Packing all the resources into one file – Part 10
While the project is in development phase it is very convenient to have all the assets laying around in folders. But when it’s time to distribute your game it doesn’t look as professional when everything is lying all over the …
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Spacefight – Sound and music – Part 9
One of the most overlooked things when you create your first game, is the sound. For me, the sound really makes a game come to life. I can just look back to when I was a kid. I could play …
Spacefight – Gamecrash, memory leaks and frustration – Part 8
In software development there are different types of bugs. C++ is a hard typed language which makes it easy for the compiler to detect errors in the code. So if there is type error (int is not a float, or …
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Spacefight – Things are moving, but do they collide? – Part 7
Now the game is as far in the development phase and things are moving around on the screen! In order to put some logic into the game I’ll need some kind of a collision detection. I will use a very …
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Spacefight – The game-loop – Part 6
All games contain loops of some sort. The most important loop in the game is simply called “game-loop”. This is a short example how it will run:
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// Creates a vector of pointers to GameObjects AnimationLibrary* animLib = new AnimationLibrary(); animLib->init(); SoundLibrary* sndLib = new SoundLibrary(); sndLib->init(); std::vector<GameObject*> gameObjectList; gameObjectList.push_back(new Enemy(400, 50, animLib, sndLib)); gameObjectList.push_back(new Player(400, 400, animLib, sndLib)); // Init all the objects before running them for(std::vector<GameObject*>::iterator it = gameObjectList.begin(); it != gameObjectList.end(); it++){ (*it)->init(); // Loads graphics, sounds and other properties } SDL_Event event; bool gameIsRunning = false; while(gameIsRunning){ // Check if game is quitting, in that case, leave the loop while(SDL_PollEvent(&event)){ if(event.type == SDL_QUIT){ gameIsRunning = false; } } // Sort the gameObjectList std::sort(gameObjectList.begin(), gameObjectList.end(), mySorter); /* Iterate through the list of gameobjects. * Using C++11's auto here instead of the tedious declaration. */ for(auto it = gameObjectList.begin(); it != gameObjectList.end(); it++){ (*it)->listen(event); (*it)->update(gameObjectList); (*it)->draw(screen); // Screen is the framebuffer // passed to all objects. } Collision::collisionCheck(gameObjectList); // The collision detection // is a separate function // and topic itself. // MORE code here, removing and deleting dead objects // checking whether player is alive, any enemies left etc. SDL_Flip(screen); // Update the screen. SDL_Delay(1000/FPS); // Wait for a bit ~20ms } |
This is a short version of what is happening in the code. …
Spacefight – Subclassing into enemies, player and other stuff – part 5
In the last post I made a GameObject class. Now it’s time to subclass from the GameObject class into an enemy. The enemy object will make use of the shared functionality in GameObject, like position, access to a shared AnimationLibrary …
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Spacefight – The GameObject – part 4
A lot of objects in the game has a many things in common. They contain an Animationlibrary, a position on the screen, width and height. They also got common functions like: Listen Sends any event from the user’s keyboard/mouse/joystick to …
Spacefight – Sprites and animations – part 3
Sprites. The small animated objects are essential to a 2D game. My game will contain quite a number of sprites like enemies, bullets and of course the the player. There are different approaches how to arrange your sprites. Some developers …