Example

scene = Scene Box( 300, 300 ); // make a scene box

New Window( "Cylinder", scene ); // put the scene in a window

For( i = 1, i < 360, i++,

scene << Perspective( 50, 1, 10 );

scene << Translate( 0.0, 0.0, -2 );

// move the world so 0,0,0 is visible in the camera

scene << Enable( Lighting );

scene << Enable( Light0 );

scene << Enable( Light1 );

scene << Light( Light0, POSITION, 1, 1, 1, 1 ); // near viewer

scene << Light( Light0, DIFFUSE, 1, 0, 0, 1 ); // red light

scene << Light( Light1, POSITION, -1, -1, -1, 1 ); // behind object

scene << Light( Light1, DIFFUSE, .5, .5, 1, 1 ); // blue-gray light

scene << Enable( Fog );

scene << Enable( NORMALIZE );

scene << Rotate( i, 1, 0, 0 );

scene << Rotate( i * 3, 0, 1, 0 );

scene << Rotate( i * 3 / 2, 0, 0, 1 );

scene << Cylinder( 0.5, 0.5, 0.5, 40, 10 );

图 13.18 Fog