// Synthetic Gears
//
//  Scott "Jerry" Lawrence
//  2003-10-14
//
//  Based on the research of Paul Haeberli, as shown in his/SGI's "Grafica Obscura"
//  Uses images from the Synthetic Lighting demonsttration found here:
//     http://www.sgi.com/grafica/synth

BImage gears[];

void setup()
{
  gears = new BImage[3];
  gears[0] = loadImage( "gearA.gif" );
  gears[1] = loadImage( "gearB.gif" );
  gears[2] = loadImage( "gearC.gif" );
  
  size( gears[0].width, gears[0].height );
}

int c = 0;
int mil;
int a1, a2, a3;

void loop()
{
  if( millis() > mil+500 )
  {
    // update the image selector
    a1 = (int)random( 3 ); //*(c+0)%3
    a2 = (int)random( 3 );
    a3 = (int)random( 3 );

    // update the counter
    c = (c+1) % 3;
    
    // and the trigger
    mil = millis();
  }

  if( mousePressed )
  {
    // show the original image
    image( gears[c], 0, 0 );
  } else {  
    // show a mixture
    for( int p = 0 ; p < gears[0].width * gears[0].height ; p++ )
    {
      color pc = color( red( gears[a1].pixels[p] ),
                        green( gears[a2].pixels[p] ),
                        blue( gears[a3].pixels[p] ));
      pixels[ p ] = pc;
    }
  }
  
  //if( keyPressed && ( key == 'G'))
  //    saveFrame();
}