// colorAnaglyph
//
//  experiments with color red-blue anaglyphs
// 
//  standard red-blue glasses have a red filter over the right eye
//  and a blue (or green) filter over the left eye.
//  this means that the image to go into the left eye should be colored
//  green and/or blue, while the image to go into the right eye should 
//  be colored red.

BImage left;
BImage right;

// 01: 31, 5
// 02: -6, -5
// 03: 7, -4

int x = 0;
int y = 0;
int c = -1;

// set up the screen and then set up the images
void setup()
{
  size( 320, 240 );
  fill( 255 );
  newImages();
}

// change to the next set of images, adjust offsets
void newImages()
{
  c++;
  if( c>2 ) { c=0; }
  if( c==0 )
  {
    left  = loadImage( "01L.jpg" );  right = loadImage( "01R.jpg" );
    x = 31;  y = 5; 
  }
  if( c==1 )
  {
    left  = loadImage( "02L.jpg" );  right = loadImage( "02R.jpg" );
    x = -6;  y = -5; 
  }
  if( c==2 )
  {
    left  = loadImage( "03L.jpg" );  right = loadImage( "03R.jpg" );
    x = 7;  y = -4; 
  }
  
}

void loop()
{
  rect( 0, 0, width, height ); // backfill with white
  image( right, x, y ); // spin out the right image

  for( int i=0 ; i<(width*height) ; i++ )
  {
    // mask off the green and blue of the right image (leave them alone)
    // then and-in the red from the left image.
    pixels[i] = (pixels[i] & 0x0000ffff) | (left.pixels[i] & 0x00ff0000);
  }
  
  if( mousePressed )
  {
    newImages();
    while( mousePressed ) /* wait till released */ ;
  };
  
  if( keyPressed && !online() && key == 'G' ) { saveFrame(); }
}