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Newcomers DBPro Corner / Menu and Game Loop Structure

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Jrock
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Posted: 18th Aug 2006 23:59
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I came into a problem the other day while I was writing a small prototype program as a test for a game I will be making. If you were to have a Menu, and have the ability to press "New Game", what would the structure of it look like? Would you have to do multiple loops? For Example, if you have to load images, and then load a level if the user presses "New Game"?

Would it be...

Load Images for Menu
DO
USER INTERACTION (If user clicks the sprite "NewGame" Gosub Load)
LOOP

Load: Load Level and materials
DO
USER INTERACTION (If user presses mouse, shoot gun)
LOOP

Jrock is pronouned Jay-Rock
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Scraggle
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Posted: 19th Aug 2006 00:09
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Looks about right.


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Jrock
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Posted: 19th Aug 2006 00:12
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So having multiple loops doesn't suck up CPU Usage?

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Sixty Squares
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Posted: 19th Aug 2006 00:21
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I wouldn't think so... But repeat-until is good too! That way you can make a condition

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Whisper Wind
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Posted: 19th Aug 2006 00:23
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Quote: "So having multiple loops doesn't suck up CPU Usage?"


Not if they aren't running at the same time

If you're menu code is completely separate from your gameplay code, its fine.

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Jrock
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Posted: 19th Aug 2006 00:25
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So is there a way to cancel a loop? Would you use an Exit Command?

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Whisper Wind
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Posted: 19th Aug 2006 00:36
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If you want to get out of a loop, an easy way would be to use the goto command, in conjunction with a label placed at the end of the loop.

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Scraggle
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Posted: 19th Aug 2006 00:37 Edited at: 19th Aug 2006 00:55
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Neve, Never, Never use GOTO it is bad coding practice!
Depsite which with Whisper Winds suggestion the code would still be in the loop and there will be errors down the line.

I would use a REPEAT ... UNTIL for the menu code, which will then exit back to your main loop when finished.

Here ... a small demonstration. Consider the rotating cube to be your main game and the rotating cylinder to be your menu. Access the menu by pressing the SpaceBar and exit by pressing Return:



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