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keyPressed (Read 1199 times)

erdmann

keyPressed
Dec 14^th, 2009, 10:10am

hi,

i'd like to know how to convert the following idea into a code:
if i press a key (on the keyboard) for example 'b' i'd like to have an action but this action should be repeated until i press another key or the same key again. so far i know how to create an action (ex.

if(keyPressed) {
if (key == 'y' || key == 'Y') {
newTarget4 ();

)

but i don't know how to repeat the action and how to stop it with keyboard.

thanks for helping

Cedric

Re: keyPressed
Reply #1 - Dec 14^th, 2009, 10:23am

You create a boolean variable and only do the action when the variable is true. Now you set one key to set the variable to false, and another to turn it on again.

boolean action = false;

void setup() {
size(400,400 );

}

void draw() {
background(0);
fill(255,30);

if(action){
fill(255,0,0);
}
ellipse(200,200,100,100);
}

void keyReleased(){
if (key == 'q' || key == 'Q') {
action = true;

}

if (key == 'W' || key == 'w') {
action = false;
}
}

twitter.com/CedricKiefer

erdmann Ex Member	Re: keyPressed Reply #2 - Dec 14^th, 2009, 10:27am this seems to be the right thing... thank you very much

erdmann

Re: keyPressed
Reply #3 - Dec 14^th, 2009, 12:00pm

hello again,

is there a possibility to create this without ''void draw()'' ?
because my code does not tolerate ''draw''. maybe there is a kind of loop or something like this.

here is a class out of my object orientated code. i hope somebody can help me.

class Essen {

PVector position;
PVector target;

Essen (float theX, float theY, float theZ) {
position = new PVector (theX, theY, theZ);
target = new PVector ();
newTargetm ();
newTarget1 ();
newTarget2 ();
newTarget3 ();
newTarget4 ();
}

void move () {
PVector step = new PVector ();
step.set (position);
step.sub (target);
step.div (5);
position.sub (step);

if(keyPressed) {
if (key == '2' || key == '"') {
newTarget1 ();
}
}
if(keyPressed) {
if (key == 'w' || key == 'W') {
newTarget2 ();
}
}
if(keyPressed) {
if (key == 's' || key == 'S') {
newTarget3 ();
}
}
if(keyPressed) {
if (key == 'x' || key == 'X') {
newTarget4 ();

}
}
if (position.dist (target) < 3) {
newTargetm ();
}

}

void newTarget1 () {
for (int a=0; a < u.length; a++) {
target.x = (u[a].position.x);
target.y = (u[a].position.y);
target.z = (u[a].position.z);
}
}

void newTarget2 () {
for (int a=0; a < uA.length; a++) {
target.x = (uA[a].position.x);
target.y = (uA[a].position.y);
target.z = (uA[a].position.z);
}
}

void newTarget3 () {
for (int a=0; a < uB.length; a++) {
target.x = (uB[a].position.x);
target.y = (uB[a].position.y);
target.z = (uB[a].position.z);
}
}
void newTarget4 () {
for (int a=0; a < uF.length; a++) {
target.x = (uF[a].position.x);
target.y = (uF[a].position.y);
target.z = (uF[a].position.z);
}
}
void newTargetm () {
for (int a=0; a < u.length; a++) {
u[a].move ();
target.x = (u[a].position.x + uA[a].position.x + uB[a].position.x + uF[a].position.x) / 4;
target.y = (u[a].position.y + uA[a].position.y + uB[a].position.y + uF[a].position.x) / 4;
target.z = (u[a].position.x + uA[a].position.z + uB[a].position.z + uF[a].position.x) / 4;
}
}

}

thanks again

Cedric YaBB Moderator Offline Posts: 1838	Re: keyPressed Reply #4 - Dec 14^th, 2009, 12:41pm please show your whole code. How can your code run without void draw() ? void draw is actually needed to make interaktion/animation etc. Thats the kind of loop you asked for.
	twitter.com/CedricKiefer

erdmann Ex Member	Re: keyPressed Reply #5 - Dec 14^th, 2009, 12:57pm hey the code is to long to post. draw is in the program butt not in the classes.

Cedric YaBB Moderator Offline Posts: 1838	Re: keyPressed Reply #6 - Dec 14^th, 2009, 1:07pm great. thats what we need. so i actually dont know what is unclear about my code. put what is in draw wherever you need it. i dont know where newTarget4 (); appears but leave it where it is and put a if(active) in front of it. thats it.
	twitter.com/CedricKiefer

erdmann Ex Member	Re: keyPressed Reply #7 - Dec 14^th, 2009, 1:19pm is it possible to create more ''draw's()'' in different classes. the reason is that there are four targets() in five classes which i'd like to control by the keyboard

Cedric

Re: keyPressed
Reply #8 - Dec 14^th, 2009, 1:50pm

you can create different functions in different classes. they can also be named draw. but it doesnt matter as you need to call them somewhere. you normally do that in the main draw function.

but like i said. no matter where your newTarget4 (); is.
just put "if(active)" in front of it and it should work. as long as active is true and you press the other button to turn it off.

if you want to controll more then one target, just create more booleans, active1,2,3,4 for example.

twitter.com/CedricKiefer

erdmann Ex Member	Re: keyPressed Reply #9 - Dec 14^th, 2009, 2:21pm yea yea yea...it works thank you very very much...

erdmann Ex Member	Re: keyPressed Reply #10 - Dec 14^th, 2009, 2:44pm and a last question. how do i manage that one key switch the action on and of?

Cedric YaBB Moderator Offline Posts: 1838	Re: keyPressed Reply #11 - Dec 14^th, 2009, 3:03pm instead of active = true; write active = !active; this toggles it on/off
	twitter.com/CedricKiefer

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