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keyboard input (Read 1540 times)
Nick93
keyboard input
Oct 31st, 2009, 3:47am  
Hello everybody.
I don't know how the keyboard input works. If I press key a, x = x+1. How have I to program this?
And witch key has witch number?

Greez Nick
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PhiLho 
Re: keyboard input
Reply #1 - Oct 31st, 2009, 6:48am  
Let see.
Above, I see a bar of links. Among them, "Learning" seems promising.
Nothing directly related, but there is a sub-bar. Why not "Basics"?
Lot of stuff there, a quick search shows Keyboard and Keyboard Functions.
Looks suited to your needs.

(You know, this Chinese adage about giving fish and teaching to fish...)
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WWW  
Nick93
Re: keyboard input
Reply #2 - Nov 1st, 2009, 11:09am  
Yes I saw that, but I don't understand this. I don't want change the colour and all that. And if I program only that what i need, it doesn't works.

Can you say me how I have to program this:
if key 'a' pressed, x = x+1

I think it needs 3 or 4 lines for this, and I don't wont try all the day to find a solution...
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PhiLho 
Re: keyboard input
Reply #3 - Nov 1st, 2009, 11:32am  
Nick93 wrote on Nov 1st, 2009, 11:09am:
And if I program only that what i need, it doesn't works.

Show what you tried.
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Cedric
Re: keyboard input
Reply #4 - Nov 1st, 2009, 11:33am  
trying is actually the best way to learn it. if we paste the code, you probably have to ask again if you want some slight changes...

this http://processing.org/reference/key.html
and this http://processing.org/reference/keyPressed_.html
gives you all you need.

If it still doesnt work, you can ask again.
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... twitter.com/CedricKiefer
WWW CedricKiefer 9570393 CedricKiefer  
Nick93
Re: keyboard input
Reply #5 - Nov 1st, 2009, 12:20pm  
That helped me more. But if i program this:

size(500,500);

int value = 0;

void draw() {
 fill(value);
 rect(25, 25, 50, 50);
}

void keyPressed() {
 if (value == 0) {
   value = 255;
 } else {
   value = 0;
 }
}

it doesn't accept 'void'.

I can't program very well, so perhaps its better if I learn at first a bit more and try it again later  Smiley Thanks for your help.
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blindfish
Re: keyboard input
Reply #6 - Nov 1st, 2009, 12:30pm  
size() must be placed in setup (and the first line in setup too):

Code:
int value = 0;

void setup() {
  size(500,500);
}

void draw() {
 fill(value);
 rect(25, 25, 50, 50);
}

void keyPressed() {
 if (value == 0) {
   value = 255;
 } else {
   value = 0;
 }
}


Maybe you should look over the getting started tutorial Wink
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Where is the what if the what is in why?
 
Nick93
Re: keyboard input
Reply #7 - Nov 1st, 2009, 2:04pm  
Yes I think too  Grin

Now it works very good  Smiley
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