air_drawing.pde

import processing.video.*;

Capture video;
int x, y;
color cc;
color trackedColor;
int size = 1;
int threshold_val = 30;
boolean drawing = false;

//int[][] colors;
ArrayList<PVector> colors = new ArrayList<PVector>(0);

color[] penColor = new color[3];
int colorChoice = 0;
boolean erase = false;



void setup(){
  //frameRate(30);
  //background(255);
  size(640, 360);
  video = new Capture(this, 320, 240);
  video.start();
  //captureEvent(video);
  penColor[0] = color(255, 0, 0);
  penColor[1] = color(0, 255, 0);
  penColor[2] = color(0, 0, 255);
}

void captureEvent(Capture video){
    video.read();
}

void draw(){
  
  image(video, 0, 0);

  loadPixels();
  video.loadPixels();
  
  //background(255);
  
   noStroke();
 
  fill(trackedColor);
  //write code that finds the distance between the ideal value
  
  if(drawing){
    
  int avgX = 1;
  int avgY = 1;
  int count = 0;
 
  for(int r = 0;r<video.height;r++){
    for(int c = 0;c<video.width;c++){
        cc = video.pixels[c+(r*video.width)];
        if(threshold(trackedColor, cc, threshold_val)){
          //fill(0);
          //stroke(0);
           //ellipse(c, r, size, size);
           count +=1;
           avgX +=c;
           avgY +=r;
           colors.add(new PVector(avgX/count,avgY/count));
        }
           
    }
  }
  
  avgX = avgX / count;
  avgY = avgY / count;
  //noFill();
  //circle(avgX, avgY, 25);
     

  for(int i = 0;i<colors.size();i++){
    fill(penColor[colorChoice]);
    ellipse(colors.get(i).x, colors.get(i).y, 10, 10);
  }//end ellipse for
  }//end of drawing boolean
  

    //fill(color(255, 0, 0));
    //ellipse(avgX, avgY, 10, 10);
    //print("drawing apparently");

  //animationCount+=1;
}//end draw

public boolean threshold(color trackedColor, color cc, int thresh){
  if(abs(red(trackedColor)-red(cc))<=thresh && abs(green(trackedColor)-green(cc))<=thresh && abs(blue(trackedColor)-blue(cc))<=thresh){
      return true;
  }//end if
  return false;
}//end function

void keyPressed(){
  if(keyCode==37){
   if(colorChoice==0){
    colorChoice=2; 
   } else {
     colorChoice-=1;
   }
  }
  if(keyCode==39){
    if(colorChoice==2){
     colorChoice=0; 
    } else {
     colorChoice +=1; 
    }
  }
  if(keyCode==32){
    if(!erase){
         erase=true;
   colors = new ArrayList<PVector>();
   drawing=false;
    }else if(erase){
     erase=false;
     drawing=true;
    }
  }
  
}

void mousePressed(){
  x = mouseX;
  y = mouseY;
  drawing=true;
  int position = (y*video.width) + x;
  color c_selected = video.pixels[position];
  print(red(c_selected) + ": " + green(c_selected) + ": " + blue(c_selected));
  trackedColor = color(red(c_selected), green(c_selected), blue(c_selected));
}