Help with mouseRealeased()

Programming Questions

procastin..

in Programming Questions • 1 year ago

Hi,

So Im try to get my program to drop a ball into a different quadrant when the ball is dragged and is released in that quadrant, but when i use && thing. its not working.

void mouseReleased() {
if( xpos= 200 && ypos< 400 )
{
    xpos=300;
    ypos=100;
} else {
    xpos=100;
    ypos=100;
}

I'm using an array OOP thing.

any help please?

Replies(6)

asimes

Re: Help with mouseRealeased()

1 year ago

if( xpos= 200 && ypos< 400 )

Try this: if( xpos == 200 && ypos < 400 )

PhiLho

Re: Help with mouseRealeased()

1 year ago

Correct answer above (a very common error).

" its not working."
When showing only a fragment of code, it can be useful to report the exact error you have. Here, the error was obvious to trained eyes, but it can be more subtle.

Last note: your condition doesn't test a quadrant! It works only if you drop precisely at the 200th pixel from the left... Check the button examples of Processing to see how to check a coordinate against a rectangle.

procastin..

Re: Help with mouseRealeased()

1 year ago

Your right Phil...The ball doesnt change quadrants when I drop it in that quadrant. Would you be able to link to that button thing you were referring to?

here is what I have done soo far... Please dont give me the straight answer as I'm trying to get ready for my finals....Please guide me..Thankyou very much.

class ball {

color c;
float xpos;
float ypos;

ball() {
c = color(int(random(255)));
xpos=100;
ypos=100;

}

void display() {
line (0,height/2,width,height/2);
line (width/2,0,width/2,height);
ellipseMode(CENTER);
fill(c);
ellipse(xpos,ypos,50,50);

}

void move()
{
if (mousePressed == true) {
   xpos=mouseX;
   ypos=mouseY;
} else {
    xpos=100;
ypos=100;
}

}

void mouseReleased() {
   if( xpos < 200 && ypos < 400 )
{
    xpos=300;
    ypos=100;
} else {
    xpos=300;
    ypos=100;
}
}

}

ball movingball;

void setup() {
size(400,400);
movingball = new ball();
}

void draw() {
background(255);
movingball.move();
movingball.display();
movingball.mouseReleased();

}

Jonny Stu..

Re: Help with mouseRealeased()

1 year ago

Buttons: http://processing.org/learning/topics/button.html, specifically the overRect function toward the end of the example.

procastin..

Re: Re: Help with mouseRealeased()

1 year ago

I looked at the overRect code but Im not sure how to proceed??

PhiLho

Re: Help with mouseRealeased()

1 year ago

You wrote:

void mouseReleased() {
if ( xpos < 200 && ypos < 400 )
{
xpos=300;
ypos=100;
}
else {
xpos=300;
ypos=100;
}
}

So whatever the condition, it does the same thing. And it is called unconditionally, it should be called only from a function of same name at the global level.

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