Painting Program

kitschen

Hey! I'm relatively new to Processing & programming in general. I'm trying to build a painting program that paints with a pink dot and the screen clears with a click. I couldn't find any examples of this problem on the internet. Help?

Here's the code:

void setup() { size (500,500); noStroke(); }

void draw(){ if (mousePressed) { background(0); }else{ background(0);

}ellipse(mouseX,mouseY,33,33); if(mousePressed) { fill(0); }else{ fill(250,0,209); } }

kfrajer

I can see a problem from start. If you click to clear, then you will clear every time you paint.

I would suggest to come up with another method. While mousePressed, draw. When mouseReleased: stop drawing. With a double click, reset.

boolean drawOn=false;
int radius =33;
int t0_click;
int double_click_time=250; // double click if two clickws withing this time window

void setup() { 
  size (500, 500); 
  noStroke();
  background(0);
  fill(250,200,200);

  t0_click=millis();
}

void draw() { 

  if(drawOn==true)
    ellipse(mouseX, mouseY, radius, radius); 

}

void mousePressed(){
  drawOn=true;
}

void mouseReleased(){
  if(millis()-t0_click < double_click_time)
    background(0);

  drawOn=false;    
  t0_click=millis();
}

One more thing. To format code in this forum, select your code and press ctrl+o. i hope this helps,

Kf

kitschen

Thank you!