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cammie827
cammie827

Paint Program

in Contributed Library Questions  •  1 year ago  
So for my first real project in processing, I decided to go simple, and make paint. I have already finished and moved on, but there are still some things I would like to work out. The main thing I want to add is an "eyedropper" tool. I've tried many different codes that work in my mind, but I just can't seem to get it to run properly. I've already tried storing the color to a variable. I'm using controlP5 for the color picker.

Copy code
  2. import controlP5.*;

  4. ControlP5 slider;

  6. int r = 255;
  7. int g = 255;
  8. int b = 255;
  9. float s = 50;

  11. float br=0;
  12. float bg=0;
  13. float bb=0;

  15. void setup()
  16. {
  17.   size(screen.width,screen.height);
  18.   smooth();
  19.   frameRate(500);
  20.   background(br,bg,bb);
  21.   strokeWeight(50);
  22.   stroke(255,0,0);
  23.   cursor(CROSS);
  24.   
  25.   slider=new ControlP5(this);
  26.   slider.addSlider("r",0,255,10,10,255,30);
  27.   slider.addSlider("g",0,255,10,50,255,30);
  28.   slider.addSlider("b",0,255,10,90,255,30);
  29.   slider.addSlider("s",0,100,10,130,255,30);
  30.   slider.addSlider("br",0,255,10,610,255,30);
  31.   slider.addSlider("bg",0,255,10,650,255,30);
  32.   slider.addSlider("bb",0,255,10,690,255,30);
  33. }
  34. void draw()
  35. {
  36.   noStroke();
  37.   fill(0);
  38.   rect(0,0,350,height);
  39.   fill(r,g,b);
  40.   ellipse(100,300,s,s);
  41.   fill(br,bg,bb);
  42.   ellipse(100,500,50,50);
  43.   stroke(r,g,b);
  44.   strokeWeight(s);
  45.   if (mousePressed == true&&mouseX>350)
  46.   {
  47.     line(mouseX,mouseY,pmouseX,pmouseY);
  48.   }
  49. }
  50. void keyPressed()
  51. {
  52.   if(keyCode==' ')
  53.   {
  54.     background(br,bg,bb);
  55.   }
  56. }

Replies(5)

PhiLho
PhiLho

Re: Paint Program

1 year ago
get() allows you to get the color at the given coordinates, which can be mouseX/Y.
cammie827
cammie827

Re: Paint Program

1 year ago
Yes, i've tried that, but I can't find a way to store the color. As I said, I've tried using variables, but it just won't work.
v.k.
v.k.

Re: Paint Program

1 year ago
 Maybe  color c = get(x, y);
?
Sergio Passos Jr.
Sergio Pa..

Re: Paint Program

1 year ago
If I understood correctly what you want, here is a simple change that allows you to pick a color with a right click (inside the app window):

Copy code
  1. if (mousePressed)
  2. {
  3.   if (mouseButton == LEFT && mouseX>350)
  4.   {  
  5.     line(mouseX,mouseY,pmouseX,pmouseY);
  6.   } else if (mouseButton == RIGHT) {
  7.     color c = get(mouseX, mouseY);
  8.     slider.controller("r").setValue(red(c));
  9.     slider.controller("g").setValue(green(c));
  10.     slider.controller("b").setValue(blue(c));
  11.   }
  12. }

I am setting the color to the sliders, but you can put it in a var instead.
cammie827
cammie827

Re: Paint Program

1 year ago
Wow, thanks! I had no idea I could access the RGB values of get() individually!
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