void densityMeasure(int x, int y, int gameScreenWidth, int gameScreenHeight) {
  switch (densitySession) {
    case 0:
      densityMeasureTotalScreen();
      break;
   case 1:
     densityMeasureROI(x, y, gameScreenWidth, gameScreenHeight);
     break;
   case 2:
     calculatePercentDensity();
     break;
   default :
     startSession = 5;
     break;
  }
}

void densityMeasureTotalScreen() {
// text("Whole Screen", 300, 600);
  if (millis() - densityTSTime <= 2000) {
    entireScreen = get(0, 0, screenWidth, screenHeight); // Get pixels of interest and saves as image for valid image path
    opencv5.loadImage(entireScreen);   // Input proper pixels into cv processing
    opencv5.updateBackground();    //Necessary for background subtraction
    opencv5.useGray();             //Create grayscale image
    opencv5.dilate();              //Clean up image
    opencv5.erode();
    opencv5.blur(3);
    cvscreen = opencv5.getOutput();     //Save computer vision as separate image path
    euglenaCount = opencv5.findContours();  //Find outline of moving objects - euglena
    totalCount = euglenaCount.size();   
  } else {
    densityROITime = millis();
    densitySession = 1;
  }
}

void densityMeasureROI(int x, int y, int gameScreenWidth, int gameScreenHeight) {
//  text("Region of Interest", 300, 600);
  if (millis() - densityROITime <= 2000) {
    gameScreen = get(x, y, gameScreenWidth, gameScreenHeight); // Get pixels of interest and saves as image for valid image path
    opencv4.loadImage(gameScreen);   // Input proper pixels into cv processing
    opencv4.updateBackground();    //Necessary for background subtraction
    opencv4.useGray();             //Create grayscale image
    opencv4.dilate();              //Clean up image
    opencv4.erode();
    opencv4.blur(3);
    o3 = opencv4.getOutput();     //Save computer vision as separate image path
    //image(o3, x - gameScreenWidth, y);
    contours = opencv4.findContours();  //Find outline of moving objects - euglena
    count = contours.size();     
  } else {
    displayDensityTime = millis();
    densitySession = 2;
  }
}

void calculatePercentDensity() {
//  if (millis() - displayDensityTime <= 4000) {  
//    text(count + " " + totalCount, 600, 900);  
//    delay(1000);
    percentDensity = ((float)count/ (float)totalCount)*100;
    densityMeasured = true;
//  } else {
//    densityTSTime = millis();
    densitySession = 0;
//  }
    
}

void displayDensity() {
  if(percentDensity != 0) {
    textSize(56);
    fill(color(180, 0, 0));
    text("% Density: " + percentDensity, 100, 100);
  }
}