KeyNavigatorApp renders a simple landscape
/*
* @(#)KeyNavigatorApp.java 1.0 99/04/15 11:42:40
*
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import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.GeometryArray;
import javax.media.j3d.IndexedTriangleArray;
import javax.media.j3d.LineArray;
import javax.media.j3d.Link;
import javax.media.j3d.Shape3D;
import javax.media.j3d.SharedGroup;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Point3f;
import javax.vecmath.Vector3f;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.behaviors.keyboard.KeyNavigatorBehavior;
import com.sun.j3d.utils.universe.SimpleUniverse;
// KeyNavigatorApp renders a simple landscape
public class KeyNavigatorApp extends Applet {
Shape3D createPyramid() {
IndexedTriangleArray pyGeom = new IndexedTriangleArray(5,
GeometryArray.COORDINATES | GeometryArray.COLOR_3, 12);
pyGeom.setCoordinate(0, new Point3f(0.0f, 0.7f, 0.0f));
pyGeom.setCoordinate(1, new Point3f(-0.4f, 0.0f, -0.4f));
pyGeom.setCoordinate(2, new Point3f(-0.4f, 0.0f, 0.4f));
pyGeom.setCoordinate(3, new Point3f(0.4f, 0.0f, 0.4f));
pyGeom.setCoordinate(4, new Point3f(0.4f, 0.0f, -0.4f));
pyGeom.setCoordinateIndex(0, 0);
pyGeom.setCoordinateIndex(1, 1);
pyGeom.setCoordinateIndex(2, 2);
pyGeom.setCoordinateIndex(3, 0);
pyGeom.setCoordinateIndex(4, 2);
pyGeom.setCoordinateIndex(5, 3);
pyGeom.setCoordinateIndex(6, 0);
pyGeom.setCoordinateIndex(7, 3);
pyGeom.setCoordinateIndex(8, 4);
pyGeom.setCoordinateIndex(9, 0);
pyGeom.setCoordinateIndex(10, 4);
pyGeom.setCoordinateIndex(11, 1);
Color3f c = new Color3f(0.6f, 0.5f, 0.55f);
pyGeom.setColor(0, c);
pyGeom.setColor(1, c);
pyGeom.setColor(2, c);
pyGeom.setColor(3, c);
pyGeom.setColor(4, c);
Shape3D pyramid = new Shape3D(pyGeom);
return pyramid;
}
Shape3D createLand() {
LineArray landGeom = new LineArray(44, GeometryArray.COORDINATES
| GeometryArray.COLOR_3);
float l = -50.0f;
for (int c = 0; c < 44; c += 4) {
landGeom.setCoordinate(c + 0, new Point3f(-50.0f, 0.0f, l));
landGeom.setCoordinate(c + 1, new Point3f(50.0f, 0.0f, l));
landGeom.setCoordinate(c + 2, new Point3f(l, 0.0f, -50.0f));
landGeom.setCoordinate(c + 3, new Point3f(l, 0.0f, 50.0f));
l += 10.0f;
}
Color3f c = new Color3f(0.1f, 0.8f, 0.1f);
for (int i = 0; i < 44; i++)
landGeom.setColor(i, c);
return new Shape3D(landGeom);
}
public BranchGroup createSceneGraph(SimpleUniverse su) {
// Create the root of the branch graph
TransformGroup vpTrans = null;
BranchGroup objRoot = new BranchGroup();
Vector3f translate = new Vector3f();
Transform3D T3D = new Transform3D();
TransformGroup TG = null;
objRoot.addChild(createLand());
SharedGroup share = new SharedGroup();
share.addChild(createPyramid());
float[][] position = { { 0.0f, 0.0f, -3.0f }, { 6.0f, 0.0f, 0.0f },
{ 6.0f, 0.0f, 6.0f }, { 3.0f, 0.0f, -10.0f },
{ 13.0f, 0.0f, -30.0f }, { -13.0f, 0.0f, 30.0f },
{ -13.0f, 0.0f, 23.0f }, { 13.0f, 0.0f, 3.0f } };
for (int i = 0; i < position.length; i++) {
translate.set(position[i]);
T3D.setTranslation(translate);
TG = new TransformGroup(T3D);
TG.addChild(new Link(share));
objRoot.addChild(TG);
}
vpTrans = su.getViewingPlatform().getViewPlatformTransform();
translate.set(0.0f, 0.3f, 0.0f);
T3D.setTranslation(translate);
vpTrans.setTransform(T3D);
KeyNavigatorBehavior keyNavBeh = new KeyNavigatorBehavior(vpTrans);
keyNavBeh
.setSchedulingBounds(new BoundingSphere(new Point3d(), 1000.0));
objRoot.addChild(keyNavBeh);
// Let Java 3D perform optimizations on this scene graph.
objRoot.compile();
return objRoot;
} // end of CreateSceneGraph method of KeyNavigatorApp
public KeyNavigatorApp() {
setLayout(new BorderLayout());
Canvas3D canvas3D = new Canvas3D(null);
add("Center", canvas3D);
// SimpleUniverse is a Convenience Utility class
SimpleUniverse simpleU = new SimpleUniverse(canvas3D);
BranchGroup scene = createSceneGraph(simpleU);
simpleU.addBranchGraph(scene);
} // end of KeyNavigatorApp (constructor)
// The following allows this to be run as an application
// as well as an applet
public static void main(String[] args) {
System.out
.print("KeyNavigatorApp.java \n- a demonstration of the KeyNavigatorBehavior ");
System.out
.println("class to provide keyboard navigation in a Java 3D scene.");
System.out
.println("When the app loads, you can use the arrow keys to move.");
System.out
.println("This is an example progam from The Java 3D API Tutorial.");
System.out.println("The Java 3D Tutorial is available on the web at:");
System.out.println("http://www.sun.com/desktop/java3d/collateral");
Frame frame = new MainFrame(new KeyNavigatorApp(), 256, 256);
} // end of main (method of KeyNavigatorApp)
} // end of class KeyNavigatorApp
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