📄 helloworld.htm

📁 详细介绍Java 3D编程的一本电子书

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<!-- Created by mktalk.pl on 5/4/99 at 4:41:12 PM -->
<TITLE>HelloWorld.java</TITLE>
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<CENTER>Building 3D content with a scene graph</CENTER></FONT>
<FONT COLOR=#FFFF00 SIZE=+3>
<CENTER><B><I>HelloWorld.java</I></B></CENTER></FONT>
<CENTER><IMG SRC="../images/red.jpg" HEIGHT=2 WIDTH=70% BORDER=0></CENTER>
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<PRE>	
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import javax.media.j3d.*;
import javax.vecmath.*;
import java.applet.*;
import java.awt.*;
import com.sun.j3d.utils.geometry.*;
import com.sun.j3d.utils.universe.*;

public class HelloWorld
{
   	public static void main( String[] args ) {
		Frame frame = new Frame( );
		frame.setSize( 640, 480 );
		frame.setLayout( new BorderLayout( ) );

		Canvas3D canvas = new Canvas3D( null );
		frame.add( "Center", canvas );

		SimpleUniverse univ = new SimpleUniverse( canvas );
		univ.getViewingPlatform( ).setNominalViewingTransform( );

		BranchGroup scene = createSceneGraph( );
		scene.compile( );
		univ.addBranchGraph( scene );

		frame.show( );
	}

	private static BranchGroup createSceneGraph( )
	{
		// Make a scene graph branch
		BranchGroup branch = new BranchGroup( );

		// Make a changeable 3D transform
		TransformGroup trans = new TransformGroup( );
		trans.setCapability( TransformGroup.ALLOW_TRANSFORM_WRITE );
		branch.addChild( trans );

		// Make a shape
		ColorCube demo = new ColorCube( 0.4 );
		trans.addChild( demo );

		// Make a behavor to spin the shape
		Alpha spinAlpha = new Alpha( -1, 4000 );
		RotationInterpolator spinner =
			new RotationInterpolator( spinAlpha, trans );
		spinner.setSchedulingBounds(
			new BoundingSphere( new Point3d( ), 1000.0 ) );
		trans.addChild( spinner );

		return branch;
	}
}
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