gistfile1.cpp

int markConnectedComponent(Image &image, int seedRow, int seedCol, int ccLabel)
{
//    int r = image.getNumRows();
//    int c = image.getNumCols();
    int counter=0; //num found pixels
    int popVal=0; //unused
 
    stack<PixelLocation> pixelStack;
 
    PixelLocation currPixel = {seedRow, seedCol};
 
    //not needed
    //PixelLocation neighbors[] = {{currPixel.r+1, currPixel.c},{currPixel.r-1, currPixel.c}, {currPixel.r, currPixel.c+1}, {currPixel.r, currPixel.c-1}};
 
    //good code
    const int seedVal = image.getPixel(seedRow, seedCol);
    pixelStack.push(currPixel);
 
    while (!pixelStack.empty())
    {
        //currPixel = pixelStack.pop();
 
        currPixel = pixelStack.pop();
 
        if (seedVal==image.getPixel(currPixel.r, currPixel.c))
        {
            counter++; //num pixels ++
            image.setPixel(currPixel.r, currPixel.c, ccLabel);
            
            /*
             This part is not correct. the values of the array in neighbors never changes
             neighbors has the neighboring pixels for your starting pixel not for you current pixel!
             your on the right track. 

             Try:
                    for every neighbor pixel to current pixel
                          if neighbor pixel is in range
                              stack.add(neighbor pixel)
                
             also counter and neighbors have no relation! 
              
               
             */
            if (image.isInBounds(neighbors[counter])) 
            {
                //pixel stack only takes pixel locations! not arrays!
                pixelStack.push(neighbors);
            }
 
        }
    }
    return counter;
}