The easiest way to open an existing project is to double-click on the file with the. You can also open that file from the File menu in Figure 2. Typically you will need to use a variety of image files, sound files, and other resource files when you write a game program.
Although there are other ways to accomplish this, the easiest way is to copy those resource files into the folder at the level shown in Figure 6. That will eliminate the need to specify a path to the resource files in the program code. A complete listing of the game program template is shown in Listing 5 near the end of the lesson.
I will explain the major elements in that template in the paragraphs and code fragments that follow. Whenever you use Dark GDK to write a game program, you must include the header file shown in Listing 1. If you attempt to build your game project and you get an error message indicating that this header file can't be found, you need to go back and review the installation guide.
The function named DarkGDK , which begins in Listing 2, is the main entry point for the game portion of the program. In any event, you don't need to worry about it, and the function named DarkGDK will be called automatically when you execute your program.
In a typical a game program, particularly one involving animation, you will want to control when and how often the screen is refreshed. This is accomplished by the two statements shown in Listing 2 plus one additional statement that I will highlight later. By default, sync is set to off which allows the system to automatically handle screen refreshing.
When dbSyncOn is used, your program is responsible for handling screen refreshing. When you want the system to automatically handle screen refreshing again, you can use the dbSyncOff command. By placing the dbSync command at the end of your main program loop, all drawing and refresh tasks can occur in a single call. This dramatically increases the speed and smoothness of graphical operations, allowing your programs to run at their best. In brief, a call to the dbSyncOn function notifies the operating system that your program will be responsible for causing the program screen to be refreshed.
The dbSyncOn function is called by the first statement in Listing 2. The second statement in Listing 2 calls the function named dbSyncRate. The description of this function is shown in Figure 9. The default rate sustains the 'Frames Per Second' at no more than 40fps. You can specify an integer value from 1 to to set a new maximum rate.
A forced sync rate cannot produce an accurate rating as in order to keep the refresh smooth, the code can only work with milliseconds which is not an accurate method of timing.
The system is designed to treat smoothness more important than frame rating accuracy. Syntax void dbSyncRate int iRate. In short, the dbSyncRate function sets the maximum refresh rate to the value passed as a parameter.
As mentioned in Figure 7, "You can refresh the screen using the dbSync command. This is the third statement used for controlling the refresh rate that I mentioned earlier. You should place the code that is to be executed during each iteration of the game loop ahead of the call to the dbSync function.
Of course that code can instantiate objects, destroy objects, and call functions whose definitions are located outside the DarkGDK function. You may need to provide function prototypes to make them accessible. Therefore, your program, which is coded into the main game loop, will continue to execute until the player closes the window in which the game is running or presses the Esc key. The easiest is to press Ctrl-F5. This is equivalent to selecting the third item from the Debug menu shown in Figure If there are errors, they will be displayed in that panel.
If there are no errors, the last line of text in that panel will be similar to the following:. If there are no errors, a window similar to that shown in Figure 1 will appear on the screen exhibiting the behavior that you have coded into the Dark GDK function. We now have , downloads in the member section. Take the FileFixation tour now for more detailed information!
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