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Spot Light
/*
* SpotLightApp.java 1.0 99/04/12
*
* Copyright (c) 1999 Sun Microsystems, Inc. All Rights Reserved.
*
* Sun grants you ("Licensee") a non-exclusive, royalty free, license to use,
* modify and redistribute this software in source and binary code form,
* provided that i) this copyright notice and license appear on all copies of
* the software; and ii) Licensee does not utilize the software in a manner
* which is disparaging to Sun.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
* IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
* NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE
* LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
* OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR ITS
* LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
* INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
* CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
* OR INABILITY TO USE SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGES.
*
* This software is not designed or intended for use in on-line control of
* aircraft, air traffic, aircraft navigation or aircraft communications; or in
* the design, construction, operation or maintenance of any nuclear
* facility. Licensee represents and warrants that it will not use or
* redistribute the Software for such purposes.
*/
/*
* This application (or a version of it) generated one or more
* of the images in Chapter 6 of Getting Started with the Java 3D API.
* The Java 3D Turtorial.
*
* See http://www.sun.com/desktop/java3d/collateral for more information.
*
*/
import java.applet.Applet;
import java.awt.BorderLayout;
import javax.media.j3d.AmbientLight;
import javax.media.j3d.Appearance;
import javax.media.j3d.Background;
import javax.media.j3d.BoundingSphere;
import javax.media.j3d.Bounds;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.IndexedQuadArray;
import javax.media.j3d.Material;
import javax.media.j3d.QuadArray;
import javax.media.j3d.Shape3D;
import javax.media.j3d.SpotLight;
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.universe.SimpleUniverse;
/**
* SpotLightApp creates
*/
public class SpotLightApp extends Applet {
Appearance createMatAppear(Color3f dColor, Color3f sColor, float shine) {
Appearance appear = new Appearance();
Material material = new Material();
material.setDiffuseColor(dColor);
material.setSpecularColor(sColor);
material.setShininess(shine);
appear.setMaterial(material);
return appear;
}
SpotLight newSpotLight(Bounds bounds, Point3f pos, float spread,
float concentration) {
SpotLight sl = new SpotLight();
sl.setInfluencingBounds(bounds);
sl.setPosition(pos);
sl.setSpreadAngle(spread);
sl.setConcentration(concentration);
return sl;
}
public SpotLightApp() {
BoundingSphere bound1 = new BoundingSphere(new Point3d(0.0, 0.9, 0.0),
0.5);
BoundingSphere bound2 = new BoundingSphere(new Point3d(0.0, 0.0, 0.0),
0.5);
BoundingSphere bound3 = new BoundingSphere(new Point3d(0.0, -0.9, 0.0),
0.5);
Vector3f direction = new Vector3f(0.0f, 0.0f, -1.0f);
Color3f white = new Color3f(1.0f, 1.0f, 1.0f);
Color3f red = new Color3f(1.0f, 0.0f, 0.0f);
Color3f green = new Color3f(0.0f, 1.0f, 0.0f);
Color3f blue = new Color3f(0.0f, 0.0f, 1.0f);
BranchGroup scene = new BranchGroup();
final int X = 101, Y = 102;
final float dx = 0.01f, dy = -0.01f;
final float epx = dx / 2.0f, epy = dy / 2.0f;
final float top = 0.5f, left = -0.5f;
final float right = left + dx * (X - 1);
final float bottom = top + dy * (Y - 1);
IndexedQuadArray qa = new IndexedQuadArray(X * Y, QuadArray.COORDINATES
| QuadArray.NORMALS, (X - 1) * (Y - 1) * 4);
float x, y;
int i = 0;
System.out.print("set " + X * Y + " coordiantes..... ");
for (y = top; y >= bottom - epx; y += dy)
for (x = left; x <= right + epx; x += dx)
qa.setCoordinate(i++, new Point3f(x, y, 0.0f));
System.out.println(i + " coordiantes done");
int row, col;
i = 0;
Vector3f n = new Vector3f(0.0f, 0.0f, 1.0f);
System.out.print("set " + (X - 1) * (Y - 1) * 4
+ " coordinate indices..... ");
for (row = 0; row < (Y - 1); row++) {
for (col = 0; col < (X - 1); col++) {
qa.setNormal(row * X + col, n);
qa.setCoordinateIndex(i++, row * X + col);
qa.setCoordinateIndex(i++, (row + 1) * X + col);
qa.setCoordinateIndex(i++, (row + 1) * X + col + 1);
qa.setCoordinateIndex(i++, row * X + col + 1);
}
qa.setNormal(row * X + col + 1, n);
}
System.out.println(i + " coordinate indices done");
for (col = 0; col < (X - 1); col++) {
qa.setNormal(X * (Y - 1) + 1 + col, n);
}
System.out.println("coordinate normals done");
Appearance qAppear = createMatAppear(blue, white, 5.0f);
Shape3D plane = new Shape3D(qa, qAppear);
Transform3D translate = new Transform3D();
translate.set(new Vector3f(-0.5f, 0.5f, 0.0f));
TransformGroup tg1 = new TransformGroup(translate);
scene.addChild(tg1);
Shape3D plane1 = new Shape3D(qa, qAppear);
plane1.setBounds(bound1);
tg1.addChild(plane1);
translate.set(new Vector3f(0.5f, 0.5f, 0.0f));
TransformGroup tg2 = new TransformGroup(translate);
scene.addChild(tg2);
Shape3D plane2 = new Shape3D(qa, qAppear);
plane2.setBounds(bound1);
tg2.addChild(plane2);
translate.set(new Vector3f(-0.5f, -0.5f, 0.0f));
TransformGroup tg3 = new TransformGroup(translate);
scene.addChild(tg3);
Shape3D plane3 = new Shape3D(qa, qAppear);
plane3.setBounds(bound3);
tg3.addChild(plane3);
translate.set(new Vector3f(0.5f, -0.5f, 0.0f));
TransformGroup tg4 = new TransformGroup(translate);
scene.addChild(tg4);
Shape3D plane4 = new Shape3D(qa, qAppear);
plane4.setBounds(bound3);
tg4.addChild(plane4);
AmbientLight lightA = new AmbientLight();
lightA.setInfluencingBounds(new BoundingSphere());
scene.addChild(lightA);
scene.addChild(newSpotLight(bound1, new Point3f(-0.7f, 0.7f, 0.5f),
0.1f, 5.0f));
scene.addChild(newSpotLight(bound1, new Point3f(0.0f, 0.7f, 0.5f),
0.1f, 50.0f));
scene.addChild(newSpotLight(bound1, new Point3f(0.7f, 0.7f, 0.5f),
0.1f, 100.0f));
scene.addChild(newSpotLight(bound2, new Point3f(-0.7f, 0.0f, 0.5f),
0.3f, 5.0f));
scene.addChild(newSpotLight(bound2, new Point3f(0.0f, 0.0f, 0.5f),
0.3f, 50.0f));
scene.addChild(newSpotLight(bound2, new Point3f(0.7f, 0.0f, 0.5f),
0.3f, 100.0f));
scene.addChild(newSpotLight(bound3, new Point3f(-0.7f, -0.7f, 0.5f),
0.5f, 5.0f));
scene.addChild(newSpotLight(bound3, new Point3f(0.0f, -0.7f, 0.5f),
0.5f, 50.0f));
scene.addChild(newSpotLight(bound3, new Point3f(0.7f, -0.7f, 0.5f),
0.5f, 100.0f));
Background background = new Background();
background.setApplicationBounds(new BoundingSphere());
background.setColor(1.0f, 1.0f, 1.0f);
scene.addChild(background);
scene.compile();
setLayout(new BorderLayout());
Canvas3D c = new Canvas3D(null);
add("Center", c);
SimpleUniverse u = new SimpleUniverse(c);
// This will move the ViewPlatform back a bit so the
// objects in the scene can be viewed.
u.getViewingPlatform().setNominalViewingTransform();
u.addBranchGraph(scene);
}
public static void main(String argv[]) {
System.out.println("SpotLightApp");
System.out
.println("illustrates the differences between spot light paramters");
System.out
.println("depending on your system.... this may take a few minutes");
new MainFrame(new SpotLightApp(), 256, 256);
}
}
