Camera myCam;
boolean smoothMove = true;

void setup()
{
  size(400, 400, P3D);
  
  // create a camera with distance 700 and smooth movement
  myCam = new Camera( 800, smoothMove );
  
  // the center of the orbit is assigned
  myCam.setTarget( 200, 200, 100 );

}

void draw()
{
  // must be called in the beginning of the draw loop
  // translate and rotate actions are called inside!
  myCam.useCam();
  
  
  // place your draw job here
  background(255);

  lights();
  directionalLight(255, 255, 200, 0, 0.2, -1);
  directionalLight(200, 200, 255, 1, 0.2, 0);

  drawSomeCubes();

  // draw a ground
  fill(255, 200);
  stroke(0);
  translate(200, 200, -11);
  ellipse(0,0, 80000, 80000);

}

// the camera movement is combined here with mouse action
void mouseDragged()
{
  if (mouseButton == LEFT)
  {
    myCam.mouseOrbit();
  } 
  else if (mouseButton == RIGHT)
  {
    myCam.mouseZoom();
  } 
  else if (mouseButton == CENTER)
  {
    myCam.mousePan();
  }
}

// the camera movement is combined here with key action
void keyPressed()
{
  if (key == CODED)
  {
    if      (keyCode == UP)    myCam.pan(  0,  30);
    else if (keyCode == DOWN)  myCam.pan(  0, -30);
    else if (keyCode == LEFT)  myCam.pan( 30,   0);
    else if (keyCode == RIGHT) myCam.pan(-30,   0);
  } 
  else 
  {
    if (key == ' ') 
    {
      smoothMove = !smoothMove;
      if (smoothMove) myCam.smooth();
      else myCam.noSmooth();
    }
    else if (key == 'a') myCam.orbit( 30,  0 );
    else if (key == 'd') myCam.orbit(-30,  0 );
    else if (key == 'w') myCam.orbit(  0, 30 );
    else if (key == 's') myCam.orbit(  0,-30 );
    else if (key == 'q'){
      myCam.setTarget( 200, 200, 0 );
      myCam.setDistance( 700 );
    }
  }

}

// simple paintjob
void drawSomeCubes()
{
  float offset = 100;
  noStroke();
  stroke(255, 40);
  for (int i=0; i<5; i++)
  {
    for (int k=0; k<5; k++)
    {
      for (int m=0; m<5; m++)
      {
        color c = color( i * (255/5), k * (255/5), m * (255/5) );
        fill( c );
        cube(offset *i, offset*k, offset* m, 20);
      }
    }
  }
}

void cube(float x, float y, float z, float bSize)
{
  pushMatrix();
  translate(x, y, z);
  box(bSize);
  popMatrix();
}