Alice Programming Tutorial, by Richard G Baldwin

Source code for the program named Alice0145a

Listing 1 presents the source code for this program.

Listing 1. Source code for program named Alice0145a.

Alice0145a's Code

Created by: Dick Baldwin

world

Methods

  public void main ( ) {


       // Copyright 2007, R.G.Baldwin
  // Demonstrates world-level methods with parameters.
  // Set the stage, could make invisible.
  doTogether { . . . . . . }

       // Position the camera.
  doTogether { . . . . . . }

       camera .setPointOfView( world ); duration = 0 seconds
  camera .turn( LEFT , 0.5 revolutions ); duration = 0 seconds
  camera .move( BACKWARD , 10 meters ); duration = 0 seconds
  camera .move( UP , 2 meters ); duration = 0 seconds
  camera .move( RIGHT , 4 meters ); duration = 0 seconds
  camera .pointAt( penguin2.head ); duration = 0 seconds
  }
  // Position the penguins.
  doTogether { . . . . . }

       penguin1 .setPointOfView( world ); duration = 0 seconds
  penguin2 .setPointOfView( world ); duration = 0 seconds
  penguin3 .setPointOfView( world ); duration = 0 seconds
  penguin1 .move( RIGHT , 1 meter ); duration = 0 seconds
  penguin3 .move( LEFT , 1 meter ); duration = 0 seconds
  }
  // Resize and position the cows.
  doTogether { . . . . . . . . . . . }

       cow1 .resize( 0.8 ); duration = 0 seconds
  cow2 .resize( 0.8 ); duration = 0 seconds
  cow3 .resize( 0.8 ); duration = 0 seconds
  cow1 .setPointOfView( world ); duration = 0 seconds
  cow2 .setPointOfView( world ); duration = 0 seconds
  cow3 .setPointOfView( world ); duration = 0 seconds
  cow1 .move( RIGHT , 1 meter ); duration = 0 seconds
  cow3 .move( LEFT , 1 meter ); duration = 0 seconds
  cow1 .move( BACKWARD , 2 meters ); duration = 0 seconds
  cow2 .move( BACKWARD , 2 meters ); duration = 0 seconds
  cow3 .move( BACKWARD , 2 meters ); duration = 0 seconds
  }
  }
  // Do the drill.
  doInOrder { . . }

       wait( 1 second );
  doTogether { . . . . . . }

       world.closeOrderDrill ( theObject = penguin1 );
  world.closeOrderDrill ( theObject = penguin2 );
  world.closeOrderDrill ( theObject = penguin3 );
  world.closeOrderDrill ( theObject = cow1 );
  world.closeOrderDrill ( theObject = cow2 );
  world.closeOrderDrill ( theObject = cow3 );
  }
  }
  }

  public void closeOrderDrill ( Object theObject) {


       // Demonstrates world-level method with parameter.
  // Note: Custom methods like penguin.walk not available.
  // Do same movement four times in succession.
  // Note: Haven't studied the use of loops yet.
  doInOrder { . . }

       theObject .turn( LEFT , 0.25 revolutions );
  theObject .move( FORWARD , 1 meter );
  }
  doInOrder { . . }

       theObject .turn( LEFT , 0.25 revolutions );
  theObject .move( FORWARD , 1 meter );
  }
  doInOrder { . . }

       theObject .turn( LEFT , 0.25 revolutions );
  theObject .move( FORWARD , 1 meter );
  }
  doInOrder { . . }

       theObject .turn( LEFT , 0.25 revolutions );
  theObject .move( FORWARD , 1 meter );
  }
  }