linux keyboard forgetting things?

huttyblue

linux keyboard forgetting things?

in Integration and Hardware • 6 months ago

this is something I have been having problems with ...

on any of my more complicated sketches the keyboard will occasionally forget that a key is being held down ...

like if im moving forward (right arrow) ... and I jump (up arrow) sometimes the game will forget that the right arrow is being held down (resulting in the character jumping straight up)

or ... when im charging an attack (space ... also tried with 'a') ... the game will sometimes randomly forget that space is being held down causing the attack to release prematurely.

is this a known issue? are there any fixes/workarounds?

... my keyboard is working fine in everything else ... btw

linux mint 14 (kde version)

Replies(6)

GoToLoop

Re: linux keyboard forgetting things?

6 months ago

Have you checked is that the same on Windows, Mac, FreeBSD or another Linux distro?
Perhaps, you also need to include callback event function keyReleased()?

huttyblue

Re: linux keyboard forgetting things?

6 months ago

I am using key Released

heres the movement code I am using ... for some reason ... when taken out of the context of the big program ... and put into a little one ... things fix themselves ... :/

so in other words ... this exact code works on a small scale ... but on a larger one it breaks

boolean key_left = false;
boolean key_right = false;
boolean key_jump = false;
boolean key_duck = false;
boolean mouseLeft = false;
boolean mouseRight = false;
boolean key_attack = false;
int x;
int y;
int attackmeter = 13;
int state;
int speed = 3;
void setup() {
size(1024, 768, OPENGL);
}
void keyReleased() { //used for managing keyboard actions
if (key == CODED && keyCode == LEFT) key_left = false;
if (key == CODED && keyCode == RIGHT) key_right = false;
if (key == CODED && keyCode == UP) key_jump = false;
if (key == CODED && keyCode == DOWN) key_duck = false;
if (key == 'a')key_attack = false;
}
void keyPressed() {
if (key == 'a')key_attack = true;
if (key == CODED &&keyCode == LEFT) key_left = true;
if (key == CODED &&keyCode == RIGHT) key_right = true;
if (key == CODED &&keyCode == UP) key_jump = true;
if (key == CODED &&keyCode == DOWN) key_duck = true;
}
void mousePressed() {
if (mouseButton == LEFT) mouseLeft = true;
if (mouseButton == RIGHT) mouseRight = true;
}
void draw() {
noStroke();
fill(255);
rect(0,0,1024,768);
for(int i = 0; i < 100; i ++){
fill(random(200,255));
rect(0,200,1024,200);
}
fill(255,0,0);
rect(x-(attackmeter/2),y-(attackmeter/2),attackmeter,attackmeter);
if(key_attack == true && attackmeter >= 12){
state = 1;
}
else state = 0;
if(state == 1) attackmeter ++;
if(state == 0 && attackmeter > 12)attackmeter --;
if(key_left == true) x-= speed;
if(key_right == true) x+= speed;
if(key_jump == true) y-= speed;
if(key_duck == true) y+= speed;
}

GoToLoop

Re: linux keyboard forgetting things?

6 months ago

Your keyReleased() sounds "healthy"! Dunno what's its probable problem!

Anyways, perhaps you can test a little variation of it to check whether it also has any problems to you:
http://forum.processing.org/topic/array-usage-objects-in-general

Look for Multiple Bullets (v2.72) up there.

A tip: you don't need to test for CODED when using key event functions!

huttyblue

Re: linux keyboard forgetting things?

6 months ago

I could try that ... although first I'm going to reconstruct the program around the working example ... to find out where it actually breaks ... (code needs a deep cleaning anyways)

huttyblue

Re: linux keyboard forgetting things?

6 months ago

I was wrong ... the posted code does have the problem ...

its just hard to tell with the square that will pick up speed right away again ...

the code below puts a square in the corner that changes color when the key gets released for a frame ...

and it flickers (like once every five seconds)

... and using else if like in Multiple Bullets (v2.72) doesn't fix it

boolean key_left = false;
boolean key_right = false;
boolean key_jump = false;
boolean key_duck = false;
boolean mouseLeft = false;
boolean mouseRight = false;
boolean key_attack = false;
int x;
int y;
int attackmeter = 13;
int state;
int speed = 3;
void setup() {
size(1024, 768, OPENGL);
}
void keyReleased() { //used for managing keyboard actions
if (key == CODED && keyCode == LEFT) key_left = false;
if (key == CODED && keyCode == RIGHT) key_right = false;
if (key == CODED && keyCode == UP) key_jump = false;
if (key == CODED && keyCode == DOWN) key_duck = false;
if (key == 'a')key_attack = false;
}
void keyPressed() {
if (key == 'a')key_attack = true;
if (key == CODED &&keyCode == LEFT) key_left = true;
if (key == CODED &&keyCode == RIGHT) key_right = true;
if (key == CODED &&keyCode == UP) key_jump = true;
if (key == CODED &&keyCode == DOWN) key_duck = true;
}
void mousePressed() {
if (mouseButton == LEFT) mouseLeft = true;
if (mouseButton == RIGHT) mouseRight = true;
}
void draw() {
noStroke();
fill(255);
rect(0,0,1024,768);
fill(255,0,0);
rect(x-(attackmeter/2),y-(attackmeter/2),attackmeter,attackmeter);
if(key_attack == true && attackmeter >= 12){
state = 1;
}
else state = 0;
if(state == 1) attackmeter ++;
if(state == 0 && attackmeter > 12)attackmeter --;
fill(0,0,0);
if(key_left == true){ x-= speed; fill(255,0,0);}
if(key_right == true){ x+= speed; fill(255,255,0);}
if(key_jump == true){ y-= speed; fill(255,0,255);}
if(key_duck == true){ y+= speed; fill(0,255,0);}
rect(0,0,40,40);
}

GoToLoop

Re: linux keyboard forgetting things?

6 months ago

Just tested it on a crap old Linux Mint 10 LXDE running from a CD!

Processing v1.5.1 under Oracle Java 6.u22.

And no accel drivers for nVidia at all (too old to access repositories)! So I had to c hange OPENGL to P3D.

Well, I didn't spot any flickers, and movement was very responsive & smooth!

So, I dunno what's wrong w/ your Linux which shouldn't be worse than 1 running under a CD as mine here!

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