Keyboard Key Hold-down? - GameCreators Forum

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gh0u1

21

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Joined: 24th Apr 2004

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Posted: 28th Apr 2004 08:31

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Okay, okay. I know I've been bugging the forums lately, and it seems like I haven't been doing any coding on my own, and for this, I'm very sorry. The fact is, I'm pestered easily by tedium, at least tedium that I find difficult to eliminate. This is just a simple question that I'm sure I used to know how to do.

There's a prompt in my code for the user to hit a key for something.
Example:

If scancode(18)=1 then in var,1

How can I set it so that I can press and hold down that key but only have var increase once, as opposed to once for every tenth of a second that I'm holding it? Essentially, I want key presses to only react once per press. Thanks, all!

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zane

21

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Joined: 23rd Feb 2004

Location: manchester, england

Posted: 28th Apr 2004 12:27

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try

+ Code Snippet

if keystate(whatever)=1 and onepress=0
onepress=1
rem - what ever you want the keypress to do
endif

if keystate(whatever)=0 and and onepress=1 then onepress=0

That should do it

www.zaneinteractive.uni.cc - my brand new site, check it out - NOW!!!!!

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Phaelax

DBPro Master

22

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Joined: 16th Apr 2003

Location: Metropia

Posted: 28th Apr 2004 22:54

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You use what is called a flag. A flag is most commonly a boolean variable, in other words, its value is either TRUE or FALSE.

The flag is down.
flag = 0
The flag is up.
flag = 1

+ Code Snippet

If scancode(18) = 1 and flag = 0
    inc var, 1
    rem was the button pressed? YES, so throw up the flag to signal that
    flag = 1
endif

rem if the button is not being pressed, put the flag down.
if scandode(18) <> 18 then flag = 0

What this means is, if the flag is up, it signals that the operation is currently taking place. In this example, a button being pressed. When the button is released, the flag stops signalling, saying that the button has not yet been pressed.

"eureka" - Archimedes

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gh0u1

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Joined: 24th Apr 2004

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Posted: 28th Apr 2004 23:17

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I remembered it being something along those lines, but when I tried it, I just created another variable that increased at a ridiculous pace.