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Index › Programming Questions & Help › Syntax Questions › Mouse pressed help.
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Mouse pressed help. (Read 581 times)
mayrp2001
Mouse pressed help.
Dec 31st, 2009, 6:25am  
Hey was wondering if anyone could help me, im having trouble with my code. Im fairle new to processing and i know its probably a really simple fix. I want a line moving across the screen and when the mouse is clicked an ellipse appears, the trouble im having is that the red line fills the whole screen or else when thats fixed the ellipses do not stay on the screen when there created.
Below is the code, any help would be great.
Cheers

Code:
float y = 0.0;
boolean ball = false;
void setup(){
  size(500,500);
}
void draw() {
  smooth();
  background(0);
  y = y + 1.5;
  stroke(247,15,15,200);
  strokeWeight(8);
  line(y, 0.0, y, 500);
  
    if(y>=500){
      y=0;
    }
   if(ball==true){
     fill(255);
     noStroke();
     ellipse(mouseX,mouseY,25,25);
   }
   }


void mousePressed()
{
  ball = true;
 
}
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Cedric
Re: Mouse pressed help.
Reply #1 - Dec 31st, 2009, 6:43am  
i store the position of the circle in a x and y coordinate variable and redraw the circle every frame ... that works fine as long as you only want one circle. If you want more you probably need to use an arrayList

Code:
float y = 0.0;
boolean ball = false;
int ballX = 0;
int ballY= 0;

void setup(){
size(500,500);
}
void draw() {
  smooth();
  background(0);
  y = y + 1.5;
  stroke(247,15,15,200);
  strokeWeight(8);
  line(y, 0.0, y, 500);
  
    if(y>=500){
	y=0;
    }
   if(ball==true){
     fill(255);
     noStroke();
     ellipse(ballX,ballY,25,25);
   }
   }


void mousePressed()
{
  ballX = mouseX;
  ballY = mouseY;
  ball = true;
 
}
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mayrp2001
Re: Mouse pressed help.
Reply #2 - Dec 31st, 2009, 7:13am  
Thanks so much for your help, Really helped
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