import processing.video.*;

Capture iSight;
int savedFrames = 0;
int sequenceLength = 3;
int currentSet = 0;
int[] lastFrame;
int MAX_FRAMES = 7;
int sensitivity = 950000;
float percentChange = 0.052;

String exportPath;
boolean doSave = false;


void setup()
{
  size( 640, 480, P3D );

  iSight = new Capture(this, width, height, 24);
  lastFrame = new int[ width*height ];
  frameRate(24);
  do exportPath = selectFolder("Select export folder");
  while( exportPath == null );

  fill(0,1);
  noStroke();
}

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

void draw()
{
  if( !doSave )
  {
    if( countDifferences( iSight.pixels, lastFrame ) > width*height*percentChange )
    {
      doSave = true;
    }
    rect(0,0,width,height);
  }

  if( doSave )
  {
    image( iSight, 0, 0);
    save( exportPath+"/sequence-"+ nf(currentSet, 4 ) +"-"+ nf(savedFrames, 3) +".png" );
    savedFrames++;
    if( countDifferences( iSight.pixels, lastFrame ) < width*height*percentChange || savedFrames == MAX_FRAMES )
    {
      doSave = false;
      currentSet++;
      savedFrames = 0;
    }
  }

  for( int i = 0; i != lastFrame.length; i++ )
  {
    lastFrame[i] = iSight.pixels[i];
  }
}

int countDifferences( int[] p1, int[] p2 )
{

  if( p1.length != p2.length ) return -1;

  int ret = 0;

  for( int i = 0; i != p1.length; i++ )
  {
    if( abs( abs( p1[i] ) - abs ( p2[i] ) ) > sensitivity ) ret++;
  }
  
  return ret;
}


void keyPressed()
{
  if( key == ' ' )
  {
    doSave = true;
    savedFrames = 0;
  }
  if( key == UP )
  {
    percentChange += 0.01;
    percentChange = min( percentChange, 1.0f);
  } else if ( key == DOWN )
  {
    percentChange -= 0.01;
    percentChange = max( percentChange, 0.0f);
  }
  
  if( key == RIGHT )
  {
    sensitivity += 1000;
    sensitivity = min( sensitivity, 1100000);
  } else if ( key == LEFT )
  {
    sensitivity -= 1000;
    sensitivity = max( sensitivity, 10000);
  }
}