/// <summary>
/// Six national flags (in artistic style) - by Jakub Vlcek, (c) 2012
/// </summary>
public static void Flags( IRayScene sc )
{
Debug.Assert( sc != null );
// CSG scene:
CSGInnerNode flags = new CSGInnerNode( SetOperation.Union );
flags.SetAttribute( PropertyName.REFLECTANCE_MODEL, new PhongModel() );
flags.SetAttribute( PropertyName.MATERIAL, new PhongMaterial( new double[] { 0.5, 0.5, 0.5 }, 0.2, 0.7, 0.1, 16 ) );
sc.Intersectable = flags;
Sphere s;
Cube c;
// Background color:
sc.BackgroundColor = new double[] { 0.0, 0.05, 0.05 };
// Camera:
sc.Camera = new StaticCamera( new Vector3d( 0.0, 0.0, -10.0 ),
new Vector3d( 0.0, 0.0, 1.0 ),
60.0 );
// Light sources:
sc.Sources = new LinkedList<ILightSource>();
sc.Sources.Add( new AmbientLightSource( 0.8 ) );
sc.Sources.Add( new PointLightSource( new Vector3d( -5.0, 3.0, -3.0 ), 1.0 ) );
sc.Sources.Add( new PointLightSource( new Vector3d( 5.0, 3.0, -3.0 ), 1.0 ) );
// --- NODE DEFINITIONS ----------------------------------------------------
// Latvian flag (intersection, difference and xor):
CSGInnerNode latvia = new CSGInnerNode( SetOperation.Intersection );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 0.3, 0.0, 0.0 } );
latvia.InsertChild( c, Matrix4d.Scale( 4.0, 2.0, 0.4 ) * Matrix4d.CreateTranslation( -2.0, -1.0, 0.0 ) );
CSGInnerNode latviaFlag = new CSGInnerNode( SetOperation.Xor );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 0.3, 0.0, 0.0 } );
latviaFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 4.0, 2.0, 2.0 ) );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 1.0, 1.0 } );
latviaFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 4.2, 0.5, 0.5 ) );
latvia.InsertChild( latviaFlag, Matrix4d.Identity );
flags.InsertChild( latvia, Matrix4d.Scale( 0.7 ) * Matrix4d.CreateRotationX( Math.PI / 8 ) * Matrix4d.CreateTranslation( -3.5, 1.5, 0.0 ) );
// Czech flag (difference):
CSGInnerNode czech = new CSGInnerNode( SetOperation.Difference );
s = new Sphere();
s.SetAttribute( PropertyName.COLOR, new double[] { 0.2, 0.2, 0.2 } );
czech.InsertChild( s, Matrix4d.Identity );
s = new Sphere();
s.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 1.0, 1.0 } );
czech.InsertChild( s, Matrix4d.CreateTranslation( 0.0, 0.8, -1.0 ) );
s = new Sphere();
s.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 0.0, 0.0 } );
czech.InsertChild( s, Matrix4d.CreateTranslation( 0.0, -0.8, -1.1 ) );
s = new Sphere();
s.SetAttribute( PropertyName.COLOR, new double[] { 0.0, 0.0, 1.0 } );
czech.InsertChild( s, Matrix4d.CreateTranslation( -1.0, 0.0, -0.8 ) );
flags.InsertChild( czech, Matrix4d.Scale( 1.6, 1.0, 1.0 ) * Matrix4d.CreateRotationY( Math.PI / 8 ) *
Matrix4d.CreateTranslation( 4.0, -1.5, 0.0 ) );
// Croatian flag (union, intersection):
CSGInnerNode croatianFlag = new CSGInnerNode( SetOperation.Union );
CSGInnerNode croatianSign = new CSGInnerNode( SetOperation.Intersection );
CSGInnerNode checkerBoard = new CSGInnerNode( SetOperation.Union );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 0.0, 0.0 } );
c.SetAttribute( PropertyName.TEXTURE, new CheckerTexture( 10.0, 10.0, new double[] { 1.0, 1.0, 1.0 } ) );
croatianSign.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 2.0, 2.0, 0.4 ) );
CSGInnerNode sign = new CSGInnerNode( SetOperation.Union );
s = new Sphere();
s.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 1.0, 1.0 } );
sign.InsertChild( s, Matrix4d.Identity );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 1.0, 1.0 } );
sign.InsertChild( c, Matrix4d.Scale( 1.8 ) * Matrix4d.CreateTranslation( -0.9, 0.1, -0.9 ) );
croatianSign.InsertChild( sign, Matrix4d.Scale( 0.5, 0.33, 0.5 ) * Matrix4d.CreateTranslation( 0.44, -0.5, 0.0 ) );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 0.0, 0.0 } );
croatianFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 4.0, 0.6, 0.6 ) *
Matrix4d.RotateX( Math.PI / 4 ) * Matrix4d.CreateTranslation( 0.5, 1.0, 1.0 ) );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 1.0, 1.0 } );
croatianFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 4.0, 0.6, 0.6 ) *
Matrix4d.RotateX( Math.PI / 4 ) * Matrix4d.CreateTranslation( 0.5, 0.3, 1.0 ) );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 0.0, 0.0, 1.0 } );
croatianFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 4.0, 0.6, 0.6 ) *
Matrix4d.RotateX( Math.PI / 4 ) * Matrix4d.CreateTranslation( 0.5, -0.4, 1.0 ) );
croatianFlag.InsertChild( croatianSign, Matrix4d.Scale( 0.8 ) * Matrix4d.CreateTranslation( 0.4, 0.5, 0.0 ) );
flags.InsertChild( croatianFlag, Matrix4d.Scale( 0.8 ) * Matrix4d.CreateRotationY( Math.PI / 8 ) * Matrix4d.CreateTranslation( -0.4, 1.5, 1.0 ) );
// Brazilian flag (union):
CSGInnerNode brazilianFlag = new CSGInnerNode( SetOperation.Union );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 0.0, 0.8, 0.0 } );
brazilianFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 4.0, 2.0, 0.2 ) );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 1.0, 0.0 } );
brazilianFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.CreateRotationZ( Math.PI / 4 ) *
Matrix4d.Scale( 2.0, 1.0, 0.4 ) );
s = new Sphere();
s.SetAttribute( PropertyName.COLOR, new double[] { 0.0, 0.0, 1.0 } );
brazilianFlag.InsertChild( s, Matrix4d.Scale( 0.5 ) * Matrix4d.CreateTranslation( 0.0, 0.0, 0.0 ) );
flags.InsertChild( brazilianFlag, Matrix4d.Scale( 0.9 ) * Matrix4d.RotateY( -Math.PI / 8 ) * Matrix4d.CreateTranslation( 0.0, -1.8, 1.0 ) );
// Finnish flag (intersection and difference):
CSGInnerNode finlandFlag = new CSGInnerNode( SetOperation.Difference );
s = new Sphere();
s.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 1.0, 1.0 } );
finlandFlag.InsertChild( s, Matrix4d.Scale( 2.0, 1.0, 0.5 ) * Matrix4d.CreateTranslation( 0.0, 0.0, 0.3 ) );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 0.0, 0.0, 1.0 } );
finlandFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 4.2, 0.5, 0.5 ) );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 0.0, 0.0, 1.0 } );
finlandFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 0.5, 4.2, 0.5 ) * Matrix4d.CreateTranslation( -0.5, 0.0, 0.0 ) );
flags.InsertChild( finlandFlag, Matrix4d.Scale( 0.7 ) * Matrix4d.CreateTranslation( 3.5, 1.5, 0.0 ) );
// Cuban flag (union and intersection):
CSGInnerNode cubanFlag = new CSGInnerNode( SetOperation.Union );
for ( int i = 0; i < 5; i++ )
{
c = new Cube();
if ( i % 2 == 0 )
c.SetAttribute( PropertyName.COLOR, new double[] { 0.0, 0.0, 1.0 } );
else
c.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 1.0, 1.0 } );
cubanFlag.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 4.0, 0.4, 0.4 ) *
Matrix4d.CreateTranslation( new Vector3d( 0.0, 0.0 - i * 0.4, 0.8 - i * 0.2 ) ) );
}
CSGInnerNode wedge = new CSGInnerNode( SetOperation.Intersection );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 0.0, 0.0 } );
wedge.InsertChild( c, Matrix4d.CreateTranslation( -0.5, -0.5, -0.5 ) * Matrix4d.Scale( 2.0, 2.0, 2.0 ) *
Matrix4d.CreateRotationZ( Math.PI / 4 ) );
c = new Cube();
c.SetAttribute( PropertyName.COLOR, new double[] { 1.0, 0.0, 0.0 } );
wedge.InsertChild( c, Matrix4d.Scale( 4.0 ) * Matrix4d.CreateTranslation( 0.0, -2.0, -2.0 ) );
cubanFlag.InsertChild( wedge, Matrix4d.Scale( 0.7 ) * Matrix4d.CreateTranslation( -2.0001, -0.8, 0.4999 ) );
flags.InsertChild( cubanFlag, Matrix4d.Scale( 0.7 ) * Matrix4d.RotateY( Math.PI / 8 ) * Matrix4d.CreateTranslation( -4.0, -1.0, 0.0 ) );
}