Java/3D/Cylinder
Содержание
PickWorld creates spheres, cylinders, and cones of different resolutions
<source lang="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 javax.media.j3d.AmbientLight; import javax.media.j3d.Appearance; import javax.media.j3d.Background; import javax.media.j3d.BoundingSphere; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.ColoringAttributes; import javax.media.j3d.DirectionalLight; import javax.media.j3d.Group; import javax.media.j3d.Material; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.vecmath.Color3f; import javax.vecmath.Point3d; import javax.vecmath.Vector3d; import javax.vecmath.Vector3f; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.behaviors.picking.PickRotateBehavior; import com.sun.j3d.utils.behaviors.picking.PickTranslateBehavior; import com.sun.j3d.utils.behaviors.picking.PickZoomBehavior; import com.sun.j3d.utils.geometry.Cone; import com.sun.j3d.utils.geometry.Cylinder; import com.sun.j3d.utils.geometry.Primitive; import com.sun.j3d.utils.geometry.Sphere; import com.sun.j3d.utils.image.TextureLoader; import com.sun.j3d.utils.universe.SimpleUniverse; /**
* 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.rupile(); 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); }
}
</source>
Spheres, cylinders, and cones of different resolutions and colors
<source lang="java">
/*
* @(#)ConicWorld.java 1.27 02/10/21 13:38:29 * * Copyright (c) 1996-2002 Sun Microsystems, Inc. All Rights Reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistribution in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of Sun Microsystems, Inc. or the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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. * * You acknowledge that Software is not designed,licensed or intended * for use in the design, construction, operation or maintenance of * any nuclear facility. */
import java.applet.Applet; import java.awt.BorderLayout; import java.awt.GraphicsConfiguration; import javax.media.j3d.Alpha; import javax.media.j3d.AmbientLight; import javax.media.j3d.Appearance; import javax.media.j3d.Background; import javax.media.j3d.BoundingSphere; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.ColoringAttributes; import javax.media.j3d.DirectionalLight; import javax.media.j3d.Group; import javax.media.j3d.Material; import javax.media.j3d.RotationInterpolator; import javax.media.j3d.TextureAttributes; import javax.media.j3d.Transform3D; import javax.media.j3d.TransformGroup; import javax.vecmath.Color3f; import javax.vecmath.Point3d; import javax.vecmath.Vector3d; import javax.vecmath.Vector3f; import com.sun.j3d.utils.applet.MainFrame; import com.sun.j3d.utils.geometry.Cone; import com.sun.j3d.utils.geometry.Cylinder; import com.sun.j3d.utils.geometry.Primitive; import com.sun.j3d.utils.geometry.Sphere; import com.sun.j3d.utils.image.TextureLoader; import com.sun.j3d.utils.universe.SimpleUniverse; /**
* ConicWorld creates spheres, cylinders, and cones of different resolutions and * colors. Demonstrates the use of the various geometry creation constructors * found in the com.sun.j3d.utils.geometry package. */
public class ConicWorld extends Applet {
private java.net.URL texImage = null; private SimpleUniverse u = null; public BranchGroup createSceneGraph(Canvas3D c) { // Create the root of the branch graph BranchGroup objRoot = new BranchGroup(); // Create a bounds for the background and behaviors BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); // Set up the background Color3f bgColor = new Color3f(0.05f, 0.05f, 0.2f); 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); // Space between each row/column double xspace = 2.0 / ((double) numCols - 1.0); double yspace = 2.0 / ((double) numRows - 1.0); for (int i = 0; i < numRows; i++) { double ypos = ((double) i * yspace - 1.0) * 0.6; for (int j = 0; j < numCols; j++) { double xpos = xpos = ((double) j * xspace - 1.0) * 0.6; objRoot .addChild(createObject(i, j, app[i][j], 0.1, xpos, ypos)); } } // Let Java 3D perform optimizations on this scene graph. objRoot.rupile(); 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); idx = idx % 5; switch (idx) { // Lit solid case 0: { // Set up the material properties Color3f objColor = new Color3f(0.8f, 0.0f, 0.0f); app.setMaterial(new Material(objColor, black, objColor, white, 80.0f)); break; } // Lit solid, no specular case 1: { // 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 2: { // Set up the material properties Color3f objColor = new Color3f(0.0f, 0.8f, 0.8f); app.setMaterial(new Material(black, black, objColor, white, 80.0f)); break; } // Texture mapped, lit solid case 3: { // Set up the texture map TextureLoader tex = new TextureLoader(texImage, this); app.setTexture(tex.getTexture()); // Set up the material properties app.setMaterial(new Material(white, black, white, black, 1.0f)); TextureAttributes texAttr = new TextureAttributes(); texAttr.setTextureMode(TextureAttributes.MODULATE); app.setTextureAttributes(texAttr); 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); // 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); 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); // Create a new Behavior object that will perform the desired // operation on the specified transform object and add it into // the scene graph. Transform3D yAxis = new Transform3D(); Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 0, 0, 5000, 0, 0, 0, 0, 0); RotationInterpolator rotator = new RotationInterpolator(rotationAlpha, spinTg, 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); // Add the behavior and the transform group to the object objTrans.addChild(rotator); objTrans.addChild(spinTg); return objTrans; } public ConicWorld() { } public ConicWorld(java.net.URL url) { texImage = url; } public void init() { if (texImage == null) { // the path to the image for an applet try { texImage = new java.net.URL(getCodeBase().toString() + "/earth.jpg"); } catch (java.net.MalformedURLException ex) { System.out.println(ex.getMessage()); System.exit(1); } } setLayout(new BorderLayout()); GraphicsConfiguration config = SimpleUniverse .getPreferredConfiguration(); Canvas3D c = new Canvas3D(config); add("Center", c); // Create a simple scene and attach it to the virtual universe BranchGroup scene = createSceneGraph(c); 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 void destroy() { u.cleanup(); } // // The following allows ConicWorld to be run as an application // as well as an applet // public static void main(String[] args) { // the path to the image file for an application java.net.URL url = null; try { url = new java.net.URL("file:earth.jpg"); } catch (java.net.MalformedURLException ex) { System.out.println(ex.getMessage()); System.exit(1); } new MainFrame(new ConicWorld(url), 700, 700); }
}
</source>
This creates a simple cylinder by using the Cylinder utility class
<source lang="java">
/* 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.event.ActionEvent; import java.awt.event.ActionListener; import javax.media.j3d.Appearance; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; 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.AxisAngle4d; import javax.vecmath.Vector3f; import com.sun.j3d.utils.geometry.Cylinder; /**
* This creates a simple cylinder by using the Cylinder utility class. * * @author I.J.Palmer * @version 1.0 */
public class SimpleCylinder extends Frame implements ActionListener {
protected Canvas3D myCanvas3D = new Canvas3D(null); protected Button myButton = 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, 5.0f)); 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; } /** * This builds the content branch of our scene graph. It uses the Cylinder * utility class to create the actual shape, adding to to the transform * group so that the shape is slightly tilted to reveal its 3D shape. * * @param shape * Node that represents the geometry for the content * @return BranchGroup that is the root of the content branch */ protected BranchGroup buildContentBranch() { BranchGroup contentBranch = new BranchGroup(); Transform3D rotateCube = new Transform3D(); rotateCube.set(new AxisAngle4d(1.0, 1.0, 0.0, Math.PI / 4.0)); TransformGroup rotationGroup = new TransformGroup(rotateCube); contentBranch.addChild(rotationGroup); //Create the shape and add it to the branch rotationGroup.addChild(new Cylinder(1.0f, 1.0f, new Appearance())); return contentBranch; } /** * Handles the exit button action to quit the program. */ public void actionPerformed(ActionEvent e) { dispose(); System.exit(0); } public SimpleCylinder() { VirtualUniverse myUniverse = new VirtualUniverse(); Locale myLocale = new Locale(myUniverse); myLocale.addBranchGraph(buildViewBranch(myCanvas3D)); myLocale.addBranchGraph(buildContentBranch()); setTitle("SimpleCylinder"); setSize(400, 400); setLayout(new BorderLayout()); add("Center", myCanvas3D); add("South", myButton); myButton.addActionListener(this); setVisible(true); } public static void main(String[] args) { SimpleCylinder sw = new SimpleCylinder(); }
}
</source>
Three resolutions of a cylinder to demonstrate
<source lang="java">
/* 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.Appearance; import javax.media.j3d.BoundingLeaf; import javax.media.j3d.BoundingSphere; import javax.media.j3d.BranchGroup; import javax.media.j3d.Canvas3D; import javax.media.j3d.DirectionalLight; import javax.media.j3d.DistanceLOD; import javax.media.j3d.Locale; import javax.media.j3d.Material; import javax.media.j3d.PhysicalBody; import javax.media.j3d.PhysicalEnvironment; import javax.media.j3d.Switch; 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.Point3f; import javax.vecmath.Vector3f; import com.sun.j3d.utils.behaviors.keyboard.KeyNavigatorBehavior; import com.sun.j3d.utils.geometry.Cylinder; /**
* This uses three resolutions of a cylinder to demonstrate the operation of a * level of detail node. * * @author I.J.Palmer * @version 1.0 */
public class SimpleLOD extends Frame implements ActionListener {
protected Canvas3D myCanvas3D = new Canvas3D(null); protected Button exitButton = new Button("Exit"); protected BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); /** * Build the view branch of the scene graph. In this case a key navigation * utility object is created and associated with the view transform so that * the view can be changed via the keyboard. * * @return BranchGroup that is the root of the view branch */ 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); viewXfmGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_READ); viewXfmGroup.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); BoundingSphere movingBounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0); BoundingLeaf boundLeaf = new BoundingLeaf(movingBounds); ViewPlatform myViewPlatform = new ViewPlatform(); viewXfmGroup.addChild(boundLeaf); 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); KeyNavigatorBehavior keyNav = new KeyNavigatorBehavior(viewXfmGroup); keyNav.setSchedulingBounds(movingBounds); viewBranch.addChild(keyNav); return viewBranch; } /** * Add some lights to the scene graph * * @param b * BranchGroup that the lights are added to */ protected void addLights(BranchGroup b) { 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); } /** * Build the content branch for the scene graph This creates three * cylinders, each with a different resolution. These are then used with a * LOD node to implement a crude level of detail. * * @return BranchGroup that is the root of the content */ protected BranchGroup buildContentBranch() { //Create the appearance Appearance app = new Appearance(); Color3f ambientColour = new Color3f(1.0f, 1.0f, 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, 1.0f, 0.0f); float shininess = 20.0f; app.setMaterial(new Material(ambientColour, emissiveColour, diffuseColour, specularColour, shininess)); //Make the switch node that is to used with the LOD //and make it writable Switch LODswitch = new Switch(); LODswitch.setCapability(Switch.ALLOW_SWITCH_WRITE); //Add the three cylinders LODswitch.addChild(new Cylinder(1.0f, 1.0f, Cylinder.GENERATE_NORMALS, 10, 10, app)); LODswitch.addChild(new Cylinder(1.0f, 1.0f, Cylinder.GENERATE_NORMALS, 5, 5, app)); LODswitch.addChild(new Cylinder(1.0f, 1.0f, Cylinder.GENERATE_NORMALS, 3, 3, app)); //Define the distances for the LOD float[] LODdistances = { 5.0f, 10.0f, 15.0f }; DistanceLOD myLOD = new DistanceLOD(LODdistances, new Point3f(0.0f, 0.0f, 0.0f)); myLOD.setSchedulingBounds(bounds); //Add the switch to the LOD myLOD.addSwitch(LODswitch); BranchGroup contentBranch = new BranchGroup(); contentBranch.addChild(myLOD); addLights(contentBranch); contentBranch.addChild(LODswitch); return contentBranch; } /** * Use the action event of the exit button to end the application. */ public void actionPerformed(ActionEvent e) { dispose(); System.exit(0); } public SimpleLOD() { VirtualUniverse myUniverse = new VirtualUniverse(); Locale myLocale = new Locale(myUniverse); myLocale.addBranchGraph(buildViewBranch(myCanvas3D)); myLocale.addBranchGraph(buildContentBranch()); setTitle("SimpleLOD"); 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) { SimpleLOD sl = new SimpleLOD(); }
}
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