Mega Code Archive
This creates a rotation interpolator and applies it to a shape
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/*
Essential Java 3D Fast
Ian Palmer
Publisher: Springer-Verlag
ISBN: 1-85233-394-4
*/
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.DirectionalLight;
import javax.media.j3d.Locale;
import javax.media.j3d.PhysicalBody;
import javax.media.j3d.PhysicalEnvironment;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.media.j3d.View;
import javax.media.j3d.ViewPlatform;
import javax.media.j3d.VirtualUniverse;
import javax.vecmath.Color3f;
import javax.vecmath.Point3d;
import javax.vecmath.Vector3f;
/**
* This creates a rotation interpolator and applies it to a shape.
*
* @author I.J.Palmer
* @version 1.0
*/
public class SimpleRotator extends Frame implements ActionListener {
protected Canvas3D myCanvas3D = new Canvas3D(null);
protected Button exitButton = new Button("Exit");
/**
* This function builds the view branch of the scene graph. It creates a
* branch group and then creates the necessary view elements to give a
* useful view of our content.
*
* @param c
* Canvas3D that will display the view
* @return BranchGroup that is the root of the view elements
*/
protected BranchGroup buildViewBranch(Canvas3D c) {
BranchGroup viewBranch = new BranchGroup();
Transform3D viewXfm = new Transform3D();
viewXfm.set(new Vector3f(0.0f, 0.0f, 10.0f));
TransformGroup viewXfmGroup = new TransformGroup(viewXfm);
ViewPlatform myViewPlatform = new ViewPlatform();
PhysicalBody myBody = new PhysicalBody();
PhysicalEnvironment myEnvironment = new PhysicalEnvironment();
viewXfmGroup.addChild(myViewPlatform);
viewBranch.addChild(viewXfmGroup);
View myView = new View();
myView.addCanvas3D(c);
myView.attachViewPlatform(myViewPlatform);
myView.setPhysicalBody(myBody);
myView.setPhysicalEnvironment(myEnvironment);
return viewBranch;
}
/**
* Add some lights so that we can illuminate the scene. This adds one
* ambient light to bring up the overall lighting level and one directional
* shape to show the shape of the objects in the scene.
*
* @param b
* BranchGroup that the lights are to be added to.
*/
protected void addLights(BranchGroup b) {
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
100.0);
Color3f ambLightColour = new Color3f(0.5f, 0.5f, 0.5f);
AmbientLight ambLight = new AmbientLight(ambLightColour);
ambLight.setInfluencingBounds(bounds);
Color3f dirLightColour = new Color3f(1.0f, 1.0f, 1.0f);
Vector3f dirLightDir = new Vector3f(-1.0f, -1.0f, -1.0f);
DirectionalLight dirLight = new DirectionalLight(dirLightColour,
dirLightDir);
dirLight.setInfluencingBounds(bounds);
b.addChild(ambLight);
b.addChild(dirLight);
}
/**
* This builds the content branch of our scene graph. The root of the shapes
* supplied as a parameter is slightly tilted to reveal its 3D shape. It
* also uses the addLights function to add some lights to the scene. We also
* create the alpha generator and the rotation interpolator to perform the
* animation.
*
* @param shape
* Node that represents the geometry for the content
* @return BranchGroup that is the root of the content branch / protected
* BranchGroup buildContentBranch(Node shape) { BranchGroup
* contentBranch = new BranchGroup(); //Create the transform and
* group used for the rotation Transform3D rotateCube = new
* Transform3D( ); TransformGroup rotationGroup = new
* TransformGroup(rotateCube); //Set the capability so we can write
* the transform rotationGroup.setCapability(
* TransformGroup.ALLOW_TRANSFORM_WRITE); //Create the alpha
* generator Alpha rotationAlpha = new Alpha(
* -1,Alpha.INCREASING_ENABLE,0,0,4000,0,0,0,0,0); //Build the
* interpolator Transform3D yAxis = new Transform3D();
* RotationInterpolator rotator = new
* RotationInterpolator(rotationAlpha, rotationGroup, yAxis, 0.0f,
* (float) Math.PI*2.0f); BoundingSphere bounds = new
* BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
* rotator.setSchedulingBounds(bounds); //Put all this together
* contentBranch.addChild(rotationGroup);
* rotationGroup.addChild(shape); rotationGroup.addChild(rotator);
* addLights(contentBranch); return contentBranch; } /** This
* creates the shape used in the program.
* @return Node that is the switch node / protected Node buildShape() {
* Appearance app = new Appearance(); Color3f ambientColour = new
* Color3f(1.0f,0.0f,0.0f); Color3f emissiveColour = new
* Color3f(0.0f,0.0f,0.0f); Color3f specularColour = new
* Color3f(1.0f,1.0f,1.0f); Color3f diffuseColour = new
* Color3f(1.0f,0.0f,0.0f); float shininess = 20.0f;
* app.setMaterial(new Material(ambientColour,emissiveColour,
* diffuseColour,specularColour,shininess)); return new Box(2.0f,
* 2.0f, 2.0f, app); } /** Process the button action to exit the
* program.
*/
public void actionPerformed(ActionEvent e) {
if (e.getSource() == exitButton) {
dispose();
System.exit(0);
}
}
public SimpleRotator() {
VirtualUniverse myUniverse = new VirtualUniverse();
Locale myLocale = new Locale(myUniverse);
myLocale.addBranchGraph(buildViewBranch(myCanvas3D));
// myLocale.addBranchGraph(buildContentBranch(buildShape()));
setTitle("SimpleRotator");
setSize(400, 400);
setLayout(new BorderLayout());
Panel bottom = new Panel();
bottom.add(exitButton);
add(BorderLayout.CENTER, myCanvas3D);
add(BorderLayout.SOUTH, bottom);
exitButton.addActionListener(this);
setVisible(true);
}
public static void main(String[] args) {
SimpleRotator sr = new SimpleRotator();
}
}
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