Picking shapes
PickWorld.java
/*
* @(#)PickWorld.java 1.10 98/04/13 13:49:14
*
* Copyright (c) 1996-1998 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.
*/
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.event.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Primitive;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.geometry.Cylinder;
import com.sun.j3d.utils.geometry.Cone;
import com.sun.j3d.utils.behaviors.picking.*;
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.image.TextureLoader;
import javax.media.j3d.*;
import javax.vecmath.*;
/**
* PickWorld creates spheres, cylinders, and cones of different resolutions
* and colors. You can pick each one and drag/zoom them around.
* The setup comes from TickTockPicking.
*/
public class PickWorld extends Applet {
public BranchGroup createSceneGraph(Canvas3D c) {
// Create the root of the branch graph
BranchGroup objRoot = new BranchGroup();
// Create a Transformgroup to scale all objects so they
// appear in the scene.
TransformGroup objScale = new TransformGroup();
Transform3D t3d = new Transform3D();
t3d.setScale(1.0);
objScale.setTransform(t3d);
objRoot.addChild(objScale);
// Create a bounds for the background and behaviors
BoundingSphere bounds =
new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
// Attach picking behavior utlities to the scene root.
// They will wake up when user manipulates a scene node.
PickRotateBehavior behavior = new
PickRotateBehavior(objRoot, c, bounds);
objRoot.addChild(behavior);
PickZoomBehavior behavior2 = new
PickZoomBehavior(objRoot, c, bounds);
objRoot.addChild(behavior2);
PickTranslateBehavior behavior3 = new
PickTranslateBehavior(objRoot, c, bounds);
objRoot.addChild(behavior3);
// Set up the background
Color3f bgColor = new Color3f(0.05f, 0.05f, 0.4f);
Background bg = new Background(bgColor);
bg.setApplicationBounds(bounds);
objRoot.addChild(bg);
// Set up the global lights
Color3f lColor1 = new Color3f(0.7f, 0.7f, 0.7f);
Vector3f lDir1 = new Vector3f(-1.0f, -1.0f, -1.0f);
Color3f alColor = new Color3f(0.2f, 0.2f, 0.2f);
AmbientLight aLgt = new AmbientLight(alColor);
aLgt.setInfluencingBounds(bounds);
DirectionalLight lgt1 = new DirectionalLight(lColor1, lDir1);
lgt1.setInfluencingBounds(bounds);
objRoot.addChild(aLgt);
objRoot.addChild(lgt1);
// Create a bunch of objects with a behavior and add them
// into the scene graph.
int row, col;
int numRows = 3, numCols = 5;
Appearance[][] app = new Appearance[numRows][numCols];
for (row = 0; row < numRows; row++)
for (col = 0; col < numCols; col++)
app[row][col] = createAppearance(row * numCols + col);
for (int i = 0; i < numRows; i++) {
double ypos = (double)(i - numRows/2) * 0.6;
for (int j = 0; j < numCols; j++) {
double xpos = (double)(j - numCols/2) * 0.4;
objScale.addChild(createObject(i, j, app[i][j], 0.1, xpos, ypos));
}
}
// Let Java 3D perform optimizations on this scene graph.
objRoot.compile();
return objRoot;
}
private Appearance createAppearance(int idx) {
Appearance app = new Appearance();
// Globally used colors
Color3f black = new Color3f(0.0f, 0.0f, 0.0f);
Color3f white = new Color3f(1.0f, 1.0f, 1.0f);
Color3f gray = new Color3f(0.4f, 0.4f, 0.4f);
idx = idx % 5;
switch (idx) {
// Lit solid
case 0:
{
// Set up the material properties
Color3f objColor = new Color3f(0.0f, 0.8f, 0.0f);
app.setMaterial(new Material(objColor, black, objColor,
white, 80.0f));
break;
}
// Lit solid, specular only
case 1:
{
// Set up the material properties
Color3f objColor = new Color3f(0.0f, 0.4f, 0.2f);
app.setMaterial(new Material(black, black, objColor,
white, 80.0f));
break;
}
case 2:
{
// Set up the texture map
TextureLoader tex = new TextureLoader("apimage.jpg", this);
app.setTexture(tex.getTexture());
// Set up the material properties
app.setMaterial(new Material(gray, black, gray, white, 1.0f));
break;
}
// Texture mapped, lit solid
case 3:
{
// Set up the texture map
TextureLoader tex = new TextureLoader("earth.jpg", this);
app.setTexture(tex.getTexture());
// Set up the material properties
app.setMaterial(new Material(gray, black, gray, white, 1.0f));
break;
}
// Another lit solid with a different color
case 4:
{
// Set up the material properties
Color3f objColor = new Color3f(1.0f, 1.0f, 0.0f);
app.setMaterial(new Material(objColor, black, objColor,
white, 80.0f));
break;
}
default:
{
ColoringAttributes ca = new ColoringAttributes();
ca.setColor(new Color3f(0.0f, 1.0f, 0.0f));
app.setColoringAttributes(ca);
}
}
return app;
}
private Group createObject(int i, int j, Appearance app, double scale,
double xpos, double ypos) {
// Create a transform group node to scale and position the object.
Transform3D t = new Transform3D();
t.set(scale, new Vector3d(xpos, ypos, 0.0));
TransformGroup objTrans = new TransformGroup(t);
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
objTrans.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
// Create a second transform group node and initialize it to the
// identity. Enable the TRANSFORM_WRITE capability so that
// our behavior code can modify it at runtime.
TransformGroup spinTg = new TransformGroup();
spinTg.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
spinTg.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
spinTg.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
Primitive obj = null;
if (i % 3 == 2){
obj = (Primitive) new Sphere(1.0f,
Sphere.GENERATE_NORMALS |
Sphere.GENERATE_TEXTURE_COORDS,
j*8 + 4,app);
}
else
if (i % 3 == 1){
obj = (Primitive) new Cylinder(1.0f, 2.0f,
Cylinder.GENERATE_TEXTURE_COORDS |
Cylinder.GENERATE_NORMALS,
j*8+4,j*8+4,
app);
}
else
if (i % 3 == 0){
obj = (Primitive) new Cone(1.0f, 2.0f,
Cone.GENERATE_NORMALS |
Cone.GENERATE_TEXTURE_COORDS,
j*8+4,j*8+4,
app);
}
// add it to the scene graph.
spinTg.addChild(obj);
objTrans.addChild(spinTg);
return objTrans;
}
public PickWorld() {
setLayout(new BorderLayout());
Canvas3D c = new Canvas3D(null);
add("Center", c);
// Create a simple scene and attach it to the virtual universe
BranchGroup scene = createSceneGraph(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);
}
//
// The following allows PickWorld to be run as an application
// as well as an applet
//
public static void main(String[] args) {
new MainFrame(new PickWorld(), 640, 480);
}
}