A game runs sequentially, this happens this time, this happens after that. A game is structured in such a way that it is easy to understand, here is the “usual” order of a game:
Section 1: Initialization
* Allocation Of Required Memory
* Set Variables
* Open And Load Files
* Load Images, Sounds, Movies, Music
* Set Up Player Variables (score, power, speed)
Basically, this section’s purpose is to get the game ready to play. Sometimes it is important to keep the initialization separated into many functions, so when you want to reset certain variables, you can call on the appropriate init function.
Section 2: Game Entrance
* Loop Back Point For Every Game Cycle
* Actions Of The game Begins
Section 3: Game Logic
* AI For Enemies
* Collision Detection
* Setting Of Variables
Do Not Mix Graphics And Logic, Keep Them Seperated
This is the section where you would give the enemy some brains, and do
Section 4: Movement
* Move Objects
* Scale Objects
* No Drawing Yet, Just Changing the Location Variables
Again, no drawing is done yet, this section comes after the logic, when you would determine how much the enemies would move, this section would be when you add that value to the enemies location variables.
Section 5: Player Input
* Where The Keyboard hits Are Read And Processed
* Mouse Movement Processed
* Joystick Movement Processed
One minor note, that doesn’t mean that all input devices have to be supported, that just means that this is where you evaluate their use during the game.
Section 6: Player Movement
* After The Evaluation Of Input, Players Variables Are Processed
* Also, Players Logic Should Also Be Put Here
Again, same as section 4 above, no drawing is done in this section.
Section 7: Rendering
* Screen Image Built Up
* Background First, Work Your Way Into Objects Closer To The Foreground
* This Is Where Everything Is Drawn, This Is Also What Takes The Mose Time Of The Game Cycle.
This is where you can finally draw everything.
Section 8: Music, Sound, Chores
* Odds And Ends Are Taken Care Of Here
* Updates Sounds
* Start Or Stop Or Pause The Music
* Updating Global Variables (frames processed, score, time elapsed)
* At Termination Of This Section, Program Jumps Back to Section 2
The Components That Comprise A Complete Game:
A game consists of many pieces, a good analogy would be a puzzle. When the puzzle is complete, it looks great. A game has many pieces, and when weaved together with the use of great programming, it creates a finished puzzle. Here are the pieces that you will need to create in order to “weave” a game together.
* There are many public sound archives where you can get sounds.
* Or, you can make them yourself, with a sound editor
* A great tool, you may not realize, is the human voice, you can make almost any sound just by using your voice, and a little sound editing.
* I suggest you get a good drawing/graphics program. I have Photoshop, and I use it for all image drawing, for editing and everything else I use Paint Shop Pro, you can get it as shareware.
* Draw animations in frames, create bounding boxes so you can visibly see the individual frames in a given picture file.
* Music is difficult, especially when your not a musician, and few programmers are.
* Get a good midi recording or editing software, using a simple tool like this, you will be surprised at what you can create.
* Sometimes, putting a bunch of notes into a song will yield a good tune, then seriously edit it from there, that’s how I make almost all my music.
* Programming your game should in my mind, be the last thing done. There are a couple reasons for this, 1)Most of the code will require the graphics to test, 2)You can concentrate on the programming 100%
* Keep related functions in separate files, and use tried-and-true programming techniques.