JavaFx - desenhando degraus em 3D

Desde o post anterior, estamos desenhando
objetos em 3D no cenário do javaFx,
e como  já falamos sobre a classe shape3D,
agora estamos mostrando um exemplo de
como criarmos caixas em 3D, observe,
que para se obter um cubo basta editarmos
as dimensões de cada Box deixando-as em
dimensões iguais.

Veja abaixo uma imagem do programa em execução:

Veja abaixo o código do programa:

import java.io.IOException;

import javafx.application.Application;

import javafx.scene.Scene;

import javafx.scene.canvas.Canvas;

import javafx.scene.canvas.GraphicsContext;

import javafx.scene.layout.Pane;

import javafx.scene.paint.Color;

import javafx.scene.paint.PhongMaterial;

import javafx.scene.shape.Box;

import javafx.scene.text.Font;

import javafx.scene.text.FontPosture;

import javafx.scene.text.FontWeight;

import javafx.scene.transform.Rotate;

import javafx.stage.Stage;

public class PROJETO extends Application {

     Canvas canvas = new Canvas ( 600, 350 );

     GraphicsContext ctx = canvas.getGraphicsContext2D ( );

     Pane root = new Pane ( );

     Scene scene = new Scene ( root );

     //Criando as caixas ( degraus ).

     Box rect_1 = new Box ( 200, 30, 100 );

     Box rect_2 = new Box ( 200, 30, 100 );

     Box rect_3 = new Box ( 200, 30, 100 );

     Box rect_4 = new Box ( 200, 30, 100 );

     // Criando PhongMaterial

     PhongMaterial material_1 = new PhongMaterial ( );

     PhongMaterial material_2 = new PhongMaterial ( );

     PhongMaterial material_3 = new PhongMaterial ( );

     PhongMaterial material_4 = new PhongMaterial ( );

     // /////////////////////////////////////////////////////////////////////////

     public void Informe ( ) {

         ctx.setFont ( Font.font ( "Arial", FontWeight.NORMAL, 13 ) );

         ctx.setFill ( Color.RED );

         ctx.fillText ( "Por: ", 300, 280 );

         ctx.setFill ( Color.BLUE );

         ctx.fillText ( "Samuel Lima", 340, 280 );

         ctx.setFill ( Color.BLACK );

         ctx.fillText ( "sa_sp10@hotmail.com", 300, 295 );

         ctx.setFill ( Color.RED );

         ctx.fillText ( " MUITO OBRIGADO", 345, 320 );

     }

     // /////////////////////////////////////////////////////////////////////////

     public void start ( Stage stage ) throws IOException {

         stage.setTitle ( "JAVAFX - DESENHANDO DEGRAUS EM 3D" );

         // Usando fonte em italic

         ctx.setFont ( Font.font ( "Helvetica", FontWeight.BOLD,

                   FontPosture.ITALIC, 15 ) );

         ctx.setFill ( Color.RED );

         ctx.fillText ( "JAVAFX - DESENHANDO DEGRAUS EM 3D", 150, 35 );

         // Criando uma moldura retangular em canvas

         ctx.setStroke ( Color.BLUE );

         ctx.setLineWidth ( 10.0 );

         ctx.strokeRoundRect ( 10, 10, 580, 330, 10, 10 );

         ctx.setFont ( Font.font ( "Helvetica", FontWeight.BOLD,

                   FontPosture.ITALIC, 12 ) );

     ////////////////////////////////////////////////////////////////////////

         material_1.setDiffuseColor ( Color.BLUE );

         material_1.setSpecularColor ( Color.BLACK );

         rect_1.setMaterial ( material_1 );

         rect_1.setLayoutX ( 150 );

         rect_1.setLayoutY ( 250 );

         rect_1.getTransforms ( ).add ( new Rotate ( 20, Rotate.X_AXIS ) );

         rect_1.getTransforms ( ).add ( new Rotate ( 10, Rotate.Z_AXIS ) );

         rect_1.getTransforms ( ).add ( new Rotate ( 30, Rotate.Y_AXIS ) );

     ////////////////////////////////////////////////////////////////////////

         material_2.setDiffuseColor ( Color.BLUE );

         material_2.setSpecularColor ( Color.BLACK );

         rect_2.setMaterial ( material_2 );

         rect_2.setLayoutX ( 202 );

         rect_2.setLayoutY ( 200 );

         rect_2.getTransforms ( ).add ( new Rotate ( 20, Rotate.X_AXIS ) );

         rect_2.getTransforms ( ).add ( new Rotate ( 10, Rotate.Z_AXIS ) );

         rect_2.getTransforms ( ).add ( new Rotate ( 30, Rotate.Y_AXIS ) );

     ////////////////////////////////////////////////////////////////////////

         material_3.setDiffuseColor ( Color.BLUE );

         material_3.setSpecularColor ( Color.BLACK );

         rect_3.setMaterial ( material_3 );

         rect_3.setLayoutX ( 254 );

         rect_3.setLayoutY ( 150 );

         rect_3.getTransforms ( ).add ( new Rotate ( 20, Rotate.X_AXIS ) );

         rect_3.getTransforms ( ).add ( new Rotate ( 10, Rotate.Z_AXIS ) );

         rect_3.getTransforms ( ).add ( new Rotate ( 30, Rotate.Y_AXIS ) );

     ////////////////////////////////////////////////////////////////////////

         material_4.setDiffuseColor ( Color.BLUE );

         material_4.setSpecularColor ( Color.BLACK );

         rect_4.setMaterial ( material_3 );

         rect_4.setLayoutX ( 306 );

         rect_4.setLayoutY ( 100 );

         rect_4.getTransforms ( ).add ( new Rotate ( 20, Rotate.X_AXIS ) );

         rect_4.getTransforms ( ).add ( new Rotate ( 10, Rotate.Z_AXIS ) );

         rect_4.getTransforms ( ).add ( new Rotate ( 30, Rotate.Y_AXIS ) );

         root.getChildren ( ).addAll ( rect_1, rect_2, rect_3, rect_4, canvas );

         Informe ( );

         stage.setScene ( scene );

         stage.show ( );

     }

     // /////////////////////////////////////////////////////////////////////////

     public static void main ( String [ ] args ) {

         launch ( args );

     }

}