<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.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; Viewpoint example added to Kelp Forest world. &lt;/p&gt;
 &lt;p&gt; Related links: Catalog page &lt;a href="../../../Chapter04ViewingNavigation/ViewpointExampleIndex.html" target="_blank"&gt;ViewpointExample&lt;/a&gt;,  source &lt;a href="../../../Chapter04ViewingNavigation/ViewpointExample.java"&gt;ViewpointExample.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/ViewpointExample.x3d"&gt;ViewpointExample.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; Viewpoint example added to Kelp Forest world. &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; Leonard Daly and Don Brutzman &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; 14 November 2005 &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 style="color:burntorange"&gt;
			&lt;td style="text-align:right; vertical-align: text-top;"&gt; &lt;i&gt; warning &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; X3D profile must be Immersive, rather than Interactive, in order to set up the X3D player to properly support the contained Inline scene KelpForestMain.x3d which has 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="https://X3dGraphics.com" target="_blank"&gt;https://X3dGraphics.com&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="https://www.web3d.org/x3d/content/examples/X3dResources.html" target="_blank"&gt;https://www.web3d.org/x3d/content/examples/X3dResources.html&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; rights &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; Copyright Don Brutzman and Leonard Daly 2007 &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; X3D book, X3D graphics, X3D-Edit, &lt;a href="http://www.x3dGraphics.com" target="_blank"&gt;http://www.x3dGraphics.com&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; identifier &lt;/i&gt; &lt;/td&gt;
			&lt;td&gt; &lt;a href="https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter04ViewingNavigation/ViewpointExample.x3d" target="_blank"&gt;https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter04ViewingNavigation/ViewpointExample.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 3.3, &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 Leonard Daly and Don Brutzman
 */

public class ViewpointExample
{
	/** Default constructor to create this object. */
	public ViewpointExample ()
	{
	  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("ViewpointExample.x3d"))
    .addMeta(new meta().setName(meta.NAME_DESCRIPTION).setContent("Viewpoint example added to Kelp Forest world."))
    .addMeta(new meta().setName(meta.NAME_CREATOR    ).setContent("Leonard Daly and Don Brutzman"))
    .addMeta(new meta().setName(meta.NAME_CREATED    ).setContent("14 November 2005"))
    .addMeta(new meta().setName(meta.NAME_MODIFIED   ).setContent("27 July 2024"))
    .addMeta(new meta().setName(meta.NAME_WARNING    ).setContent("X3D profile must be Immersive, rather than Interactive, in order to set up the X3D player to properly support the contained Inline scene KelpForestMain.x3d which has profile Immersive."))
    .addMeta(new meta().setName(meta.NAME_REFERENCE  ).setContent("https://X3dGraphics.com"))
    .addMeta(new meta().setName(meta.NAME_REFERENCE  ).setContent("https://www.web3d.org/x3d/content/examples/X3dResources.html"))
    .addMeta(new meta().setName(meta.NAME_RIGHTS     ).setContent("Copyright Don Brutzman and Leonard Daly 2007"))
    .addMeta(new meta().setName(meta.NAME_SUBJECT    ).setContent("X3D book, X3D graphics, X3D-Edit, http://www.x3dGraphics.com"))
    .addMeta(new meta().setName(meta.NAME_IDENTIFIER ).setContent("https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter04ViewingNavigation/ViewpointExample.x3d"))
    .addMeta(new meta().setName(meta.NAME_GENERATOR  ).setContent("X3D-Edit 3.3, https://savage.nps.edu/X3D-Edit"))
    .addMeta(new meta().setName(meta.NAME_LICENSE    ).setContent("../license.html")))
  .setScene(new Scene()
    .addChild(new WorldInfo().setTitle("ViewpointExample.x3d"))
    .addChild(new Viewpoint("DefaultPositionLeft7Degrees").setDescription("7 degree towards left").setOrientation(0.0,1.0,0.0,0.1222))
    .addComments(" There are many viewpoints in the following scene(s) ")
    .addChild(new Inline().setUrl(new String[] {"../KelpForestExhibit/KelpForestMain.x3d","https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/KelpForestExhibit/KelpForestMain.x3d","../KelpForestExhibit/KelpForestMain.wrl","https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/KelpForestExhibit/KelpForestMain.wrl"})));
            }
            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 ViewpointExample 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 ViewpointExample().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.ViewpointExample\" 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.ViewpointExample self-validation test confirmation: ");
                if (!validationResults.equals("success"))
                    System.out.println();
                System.out.println(validationResults.trim());

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