<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">package X3dForWebAuthors.Chapter04ViewingNavigation;

import org.web3d.x3d.jsail.Core.*;
import org.web3d.x3d.jsail.EnvironmentalEffects.*;
import org.web3d.x3d.jsail.fields.*;
import org.web3d.x3d.jsail.Navigation.*;
import org.web3d.x3d.jsail.Networking.*;

// Javadoc metadata annotations follow, see below for X3DJSAIL Java source code.
/**
 * &lt;p&gt; Illustrates Billboard operation using Kelp Forest example scenes for Figure 4.4, X3D for Web Authors. &lt;/p&gt;
 &lt;p&gt; Related links: Catalog page &lt;a href="../../../Chapter04ViewingNavigation/BillboardExampleIndex.html" target="_blank"&gt;BillboardExample&lt;/a&gt;,  source &lt;a href="../../../Chapter04ViewingNavigation/BillboardExample.java"&gt;BillboardExample.java&lt;/a&gt;, &lt;a href="https://www.web3d.org/x3d/content/examples/X3dResources.html" target="_blank"&gt;X3D Resources&lt;/a&gt;, &lt;a href="https://www.web3d.org/x3d/content/examples/X3dSceneAuthoringHints.html" target="_blank"&gt;X3D Scene Authoring Hints&lt;/a&gt;, and &lt;a href="https://www.web3d.org/x3d/content/X3dTooltips.html" target="_blank"&gt;X3D Tooltips&lt;/a&gt;. &lt;/p&gt;
	&lt;table style="color:black; border:0px solid; border-spacing:10px 0px;"&gt;
        &lt;caption&gt;Scene Meta Information&lt;/caption&gt;
		&lt;tr style="background-color:silver; border-color:silver;"&gt;
			&lt;td style="text-align:center; padding:10px 0px;"&gt;&lt;i&gt;meta tags&lt;/i&gt;&lt;/td&gt;
			&lt;td style="text-align:left;   padding:10px 0px;"&gt;&amp;nbsp; Document Metadata &lt;/td&gt;
		&lt;/tr&gt;

		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; title &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; &lt;a href="../../../Chapter04ViewingNavigation/BillboardExample.x3d"&gt;BillboardExample.x3d&lt;/a&gt; &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; description &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; Illustrates Billboard operation using Kelp Forest example scenes for Figure 4.4, X3D for Web Authors. &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; creator &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; Don Brutzman and Leonard Daly &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; created &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; 13 June 2004 &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; modified &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; 27 July 2024 &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; info &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; Contained Inline scenes each have profile Immersive &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; reference &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; &lt;a href="http://faculty.nps.edu/brutzman/kelp" target="_blank"&gt;http://faculty.nps.edu/brutzman/kelp&lt;/a&gt; &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; reference &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; &lt;a href="http://faculty.nps.edu/brutzman/kelp/KelpForestDesignPaper.pdf" target="_blank"&gt;http://faculty.nps.edu/brutzman/kelp/KelpForestDesignPaper.pdf&lt;/a&gt; &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; subject &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; Kelp Forest 3D models &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; accessRights &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; Revisions Copyright (c) 2006, Daly Realism and Don Brutzman. Original content has permissions for free use. Please provide credit to the Naval Postgraduate School (NPS) Modeling Virtual Environments and Simulation (MOVES) Institute. &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; identifier &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; &lt;a href="https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter04ViewingNavigation/BillboardExample.x3d" target="_blank"&gt;https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter04ViewingNavigation/BillboardExample.x3d&lt;/a&gt; &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; generator &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; X3D-Edit 4.0, &lt;a href="https://savage.nps.edu/X3D-Edit" target="_blank"&gt;https://savage.nps.edu/X3D-Edit&lt;/a&gt; &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; license &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; &lt;a href="../../../Chapter04ViewingNavigation/../license.html"&gt;../license.html&lt;/a&gt; &lt;/td&gt;
		&lt;/tr&gt;
		&lt;tr style="background-color:silver; border-color:silver;"&gt;
			&lt;td style="text-align:center;" colspan="2"&gt;  &amp;nbsp; &lt;/td&gt;
		&lt;/tr&gt;
	&lt;/table&gt;

	&lt;p&gt;
		This program uses the
		&lt;a href="https://www.web3d.org/specifications/java/X3DJSAIL.html" target="_blank"&gt;X3D Java Scene Access Interface Library (X3DJSAIL)&lt;/a&gt;.
		It has been produced using the 
		&lt;a href="https://www.web3d.org/x3d/stylesheets/X3dToJava.xslt" target="_blank"&gt;X3dToJava.xslt&lt;/a&gt;
		stylesheet
	       (&lt;a href="https://sourceforge.net/p/x3d/code/HEAD/tree/www.web3d.org/x3d/stylesheets/X3dToJava.xslt" target="_blank"&gt;version control&lt;/a&gt;)
                which is used to create Java source code from an original &lt;code&gt;.x3d&lt;/code&gt; model.
	&lt;/p&gt;

	* @author Don Brutzman and Leonard Daly
 */

public class BillboardExample
{
	/** Default constructor to create this object. */
	public BillboardExample ()
	{
	  initialize();
	}

	/** Create and initialize the X3D model for this object. */
	public final void initialize()
	{
            try { // catch-all
  x3dModel = new X3D().setProfile(X3D.PROFILE_IMMERSIVE).setVersion(X3D.VERSION_3_3)
  .setHead(new head()
    .addMeta(new meta().setName(meta.NAME_TITLE      ).setContent("BillboardExample.x3d"))
    .addMeta(new meta().setName(meta.NAME_DESCRIPTION).setContent("Illustrates Billboard operation using Kelp Forest example scenes for Figure 4.4, X3D for Web Authors."))
    .addMeta(new meta().setName(meta.NAME_CREATOR    ).setContent("Don Brutzman and Leonard Daly"))
    .addMeta(new meta().setName(meta.NAME_CREATED    ).setContent("13 June 2004"))
    .addMeta(new meta().setName(meta.NAME_MODIFIED   ).setContent("27 July 2024"))
    .addMeta(new meta().setName(meta.NAME_INFO       ).setContent("Contained Inline scenes each have profile Immersive"))
    .addMeta(new meta().setName(meta.NAME_REFERENCE  ).setContent("http://faculty.nps.edu/brutzman/kelp"))
    .addMeta(new meta().setName(meta.NAME_REFERENCE  ).setContent("http://faculty.nps.edu/brutzman/kelp/KelpForestDesignPaper.pdf"))
    .addMeta(new meta().setName(meta.NAME_SUBJECT    ).setContent("Kelp Forest 3D models"))
    .addMeta(new meta().setName(meta.NAME_ACCESSRIGHTS).setContent("Revisions Copyright (c) 2006, Daly Realism and Don Brutzman. Original content has permissions for free use. Please provide credit to the Naval Postgraduate School (NPS) Modeling Virtual Environments and Simulation (MOVES) Institute."))
    .addMeta(new meta().setName(meta.NAME_IDENTIFIER ).setContent("https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter04ViewingNavigation/BillboardExample.x3d"))
    .addMeta(new meta().setName(meta.NAME_GENERATOR  ).setContent("X3D-Edit 4.0, https://savage.nps.edu/X3D-Edit"))
    .addMeta(new meta().setName(meta.NAME_LICENSE    ).setContent("../license.html")))
  .setScene(new Scene()
    .addChild(new WorldInfo().setTitle("BillboardExample.x3d"))
    .addChild(new Background().setGroundAngle(new double[] {1.309,1.5707}).setGroundColor(new MFColor(new double[] {0.1,0.1,0.0,0.4,0.25,0.2,0.6,0.6,0.6})).setSkyAngle(new double[] {1.309,1.5707}).setSkyColor(new MFColor(new double[] {0.0,0.5,1.0,0.0,0.0,1.0,0.0,0.0,1.0})))
    .addChild(new Viewpoint().setDescription("Entry view from ahead, no rotations").setPosition(0.0,-5.0,45.0))
    .addChild(new Viewpoint().setDescription("Observe Billboard effect: text remains visible while navigating around").setOrientation(0.0,1.0,0.0,0.86).setPosition(37.01,-5.0,29.59))
    .addChild(new Billboard().setAxisOfRotation(0.0,1.0,0.0)
      .addChild(new Inline().setUrl(new String[] {"../KelpForestExhibit/IntroductionMessage.x3d","https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter04ViewingNavigation/../KelpForestExhibit/IntroductionMessage.x3d","../KelpForestExhibit/IntroductionMessage.wrl","https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/KelpForestExhibit/IntroductionMessage.x3d"})))
    .addChild(new Inline().setUrl(new String[] {"../KelpForestExhibit/KelpTank.x3d","https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter04ViewingNavigation/../KelpForestExhibit/KelpTank.x3d","../KelpForestExhibit/KelpTank.wrl","https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/KelpForestExhibit/KelpTank.x3d"})));
            }
            catch (Exception ex)
            {       
                System.err.println ("*** Further hints on X3DJSAIL errors and exceptions at");
                System.err.println ("*** https://www.web3d.org/specifications/java/X3DJSAIL.html");
                throw (ex);
            }
	}
	// end of initialize() method

	/** The initialized model object, created within initialize() method. */
	private X3D x3dModel;

	/** 
	 * Provide a 
	 * &lt;a href="https://dzone.com/articles/java-copy-shallow-vs-deep-in-which-you-will-swim" target="_blank"&gt;shallow copy&lt;/a&gt;
	 * of the X3D model.
	 * @see &lt;a href="https://www.web3d.org/specifications/java/javadoc/org/web3d/x3d/jsail/Core/X3D.html"&gt;X3D&lt;/a&gt;
	 * @return BillboardExample model
	 */
	public X3D getX3dModel()
	{	  
		return x3dModel;
	}
	   
    /** 
     * Default main() method provided for test purposes, uses CommandLine to set global ConfigurationProperties for this object.
     * @param args array of input parameters, provided as arguments
     * @see &lt;a href="https://www.web3d.org/specifications/java/javadoc/org/web3d/x3d/jsail/Core/X3D.html#handleArguments-java.lang.String:A-"&gt;X3D.handleArguments(args)&lt;/a&gt;
     * @see &lt;a href="https://www.web3d.org/specifications/java/javadoc/org/web3d/x3d/jsail/Core/X3D.html#validationReport--"&gt;X3D.validationReport()&lt;/a&gt;
     * @see &lt;a href="https://www.web3d.org/specifications/java/javadoc/org/web3d/x3d/jsail/CommandLine.html"&gt;CommandLine&lt;/a&gt;
     * @see &lt;a href="https://www.web3d.org/specifications/java/javadoc/org/web3d/x3d/jsail/CommandLine.html#USAGE"&gt;CommandLine.USAGE&lt;/a&gt;
     * @see &lt;a href="https://www.web3d.org/specifications/java/javadoc/org/web3d/x3d/jsail/ConfigurationProperties.html"&gt;ConfigurationProperties&lt;/a&gt;
     */
    public static void main(String args[])
    {
        System.out.println("Build this X3D model, showing validation diagnostics...");
        X3D thisExampleX3dModel = new BillboardExample().getX3dModel();
//      System.out.println("X3D model construction complete.");
	
        // next handle command line arguments
        boolean hasArguments = (args != null) &amp;&amp; (args.length &gt; 0);
        boolean validate = true; // default
        boolean argumentsLoadNewModel = false;
        String  fileName = new String();

        if (args != null)
        {
                for (String arg : args)
                {
                        if (arg.toLowerCase().startsWith("-v") || arg.toLowerCase().contains("validate"))
                        {
                                validate = true; // making sure
                        }
                        if (arg.toLowerCase().endsWith(X3D.FILE_EXTENSION_X3D) ||
                                arg.toLowerCase().endsWith(X3D.FILE_EXTENSION_CLASSICVRML) ||
                                arg.toLowerCase().endsWith(X3D.FILE_EXTENSION_X3DB) ||
                                arg.toLowerCase().endsWith(X3D.FILE_EXTENSION_VRML97) ||
                                arg.toLowerCase().endsWith(X3D.FILE_EXTENSION_EXI) ||
                                arg.toLowerCase().endsWith(X3D.FILE_EXTENSION_GZIP) ||
                                arg.toLowerCase().endsWith(X3D.FILE_EXTENSION_ZIP) ||
                                arg.toLowerCase().endsWith(X3D.FILE_EXTENSION_HTML) ||
                                arg.toLowerCase().endsWith(X3D.FILE_EXTENSION_XHTML))
                        {
                                argumentsLoadNewModel = true;
                                fileName = arg;
                        }
                }
        }
        if      (argumentsLoadNewModel)
                System.out.println("WARNING: \"X3dForWebAuthors.Chapter04ViewingNavigation.BillboardExample\" model invocation is attempting to load file \"" + fileName + "\" instead of simply validating itself... file loading ignored.");
        else if (hasArguments) // if no arguments provided, this method produces usage warning
                thisExampleX3dModel.handleArguments(args);
	
        if (validate)
        {
            //  System.out.println("--- TODO fix duplicated outputs ---"); // omit when duplicated outputs problem is solved/refactored
		String validationResults = thisExampleX3dModel.validationReport();
            //  System.out.println("-----------------------------------"); // omit when duplicated outputs problem is solved/refactored
                System.out.print("X3dForWebAuthors.Chapter04ViewingNavigation.BillboardExample self-validation test confirmation: ");
                if (!validationResults.equals("success"))
                    System.out.println();
                System.out.println(validationResults.trim());

                // experimental: test X3DJSAIL output files
                // Chapter04ViewingNavigation/BillboardExample_JavaExport.* file validation is checked when building X3D Example Archives
                String filenameX3D  = "Chapter04ViewingNavigation/BillboardExample_JavaExport.x3d"; 
                String filenameX3DV = "Chapter04ViewingNavigation/BillboardExample_JavaExport.x3dv"; 
                String filenameJSON = "Chapter04ViewingNavigation/BillboardExample_JavaExport.json";
                thisExampleX3dModel.toFileX3D        (filenameX3D);
                thisExampleX3dModel.toFileClassicVRML(filenameX3DV);
// TODO         thisExampleX3dModel.toFileJSON       (filenameJSON);
        }
    }
}
</pre></body></html>