orientedpttest.java

java 3d编程的一些例子源代码

/*
 * $RCSfile: OrientedPtTest.java,v $
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 * This software is provided "AS IS," without a warranty of any
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 * $Revision: 1.2 $
 * $Date: 2006/03/06 17:14:52 $
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package org.jdesktop.j3d.examples.oriented_shape3d;

import java.applet.Applet;
import java.awt.BorderLayout;
import com.sun.j3d.utils.image.TextureLoader;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.ColorCube;
import com.sun.j3d.utils.geometry.Cone;
import com.sun.j3d.utils.geometry.Cylinder;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.awt.*;
import com.sun.j3d.utils.behaviors.vp.*;
import org.jdesktop.j3d.examples.Resources;

public class OrientedPtTest extends Applet {

    // setup font stuff
    private String fontName = "TestFont";
    private String textString = "OrientedShape3D";
    float sl = textString.length();

    // paths to texture image files
    private java.net.URL earthImage = null;
    private java.net.URL stoneImage = null;

    private SimpleUniverse u;

    public BranchGroup createSceneGraph() {

	// Create the root of the branch graph
	BranchGroup objRoot = new BranchGroup();

        TransformGroup objScale = new TransformGroup();
        Transform3D textMat = new Transform3D();
        // Assuming uniform size chars, set scale to fit string in view
        textMat.setScale(1.2/sl);
        objScale.setTransform(textMat);



	// Create the transform group node and initialize it to the
	// identity.  Enable the TRANSFORM_WRITE capability so that
	// our behavior code can modify it at runtime.  Add it to the
	// root of the subgraph.
	TransformGroup objTrans = new TransformGroup();
	objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
	objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
	objRoot.addChild(objTrans);

	BoundingSphere bounds =
	    new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);

        Appearance apText = new Appearance();
	Material m = new Material();
        m.setLightingEnable(true);
	apText.setMaterial(m);


        Appearance apEarth= new Appearance();
        Material mm = new Material();
        mm.setLightingEnable(true);
	apEarth.setMaterial(mm);

        Appearance apStone = new Appearance();
	apStone.setMaterial(mm);

// create 3D text 
        Font3D f3d = new Font3D(new Font(fontName, Font.PLAIN, 2),
                                new FontExtrusion());
	Point3f textPt = new Point3f( -sl/2.0f, 3.0f, 0.0f);
        Text3D txt = new Text3D(f3d, textString, textPt); 
        OrientedShape3D textShape = new OrientedShape3D();
        textShape.setGeometry(txt);
        textShape.setAppearance(apText);

	textShape.setAlignmentMode(OrientedShape3D.ROTATE_ABOUT_POINT);
	// text is centered around 0, 3, 0.  Make it rotate around 0,5,0
	Point3f rotationPt = new Point3f(0.0f, 5.0f, 0.0f);
	textShape.setRotationPoint(rotationPt);
        objScale.addChild( textShape );

	// also add a small Sphere at the rotation point to 
	// show that we are rotating around the right point
	Sphere sphere = new Sphere(0.2f);
	TransformGroup sphereGroup = new TransformGroup();
	Transform3D sphereXform = new Transform3D();
	sphereXform.set(new Vector3f(rotationPt));
	sphereGroup.setTransform(sphereXform);
	sphereGroup.addChild(sphere);
	objScale.addChild(sphereGroup);


	// Create a simple shape leaf node, add it to the scene graph.

	Transform3D cubeMat = new Transform3D();
	TransformGroup cubeTrans = new TransformGroup(cubeMat);
	cubeMat.set(new Vector3d(0.9, 0.0, -1.0));
	cubeTrans.setTransform(cubeMat);
	cubeTrans.addChild(new ColorCube(0.3));
        objTrans.addChild(cubeTrans);

        TextureLoader stoneTex = new TextureLoader(stoneImage, new String("RGB"), this);
        if (stoneTex != null) apStone.setTexture(stoneTex.getTexture());

 	TextureAttributes texAttr = new TextureAttributes();
 	texAttr.setTextureMode(TextureAttributes.REPLACE);
 	apStone.setTextureAttributes(texAttr);

	Transform3D coneMat = new Transform3D();
	TransformGroup coneTrans = new TransformGroup(coneMat);
	coneMat.set(new Vector3d(0.0, 0.0, 0.0));
	coneTrans.setTransform(coneMat);
	coneTrans.addChild(new Cone(.2f, 0.8f,Cone.GENERATE_NORMALS |
				    Cone.GENERATE_TEXTURE_COORDS, apStone));
        objTrans.addChild(coneTrans);

        TextureLoader earthTex = new TextureLoader(earthImage, new String("RGB"), this);
        if (earthTex != null) apEarth.setTexture(earthTex.getTexture());
 	apEarth.setTextureAttributes(texAttr);

	Transform3D cylinderMat = new Transform3D();
	TransformGroup cylinderTrans = new TransformGroup(cylinderMat);
	cylinderMat.set(new Vector3d(-0.9, 0.5, -1.0));
	cylinderTrans.setTransform(cylinderMat);
	cylinderTrans.addChild(new Cylinder(.35f, 2.0f,Cylinder.GENERATE_NORMALS |
						      Cylinder.GENERATE_TEXTURE_COORDS, apEarth));
        objTrans.addChild(cylinderTrans);

        objTrans.addChild(objScale);




        // Set up the background
        Color3f bgColor = new Color3f(0.05f, 0.05f, 0.5f);
        Background bgNode = new Background(bgColor);
        bgNode.setApplicationBounds(bounds);
        objRoot.addChild(bgNode);

        // Set up the ambient light
        Color3f ambientColor = new Color3f(0.1f, 0.1f, 0.1f);
        AmbientLight ambientLightNode = new AmbientLight(ambientColor);
        ambientLightNode.setInfluencingBounds(bounds);
        objRoot.addChild(ambientLightNode);

        // Set up the directional lights
        Color3f light1Color = new Color3f(1.0f, 1.0f, 0.9f);
        Vector3f light1Direction  = new Vector3f(1.0f, 1.0f, 1.0f);
        Color3f light2Color = new Color3f(1.0f, 1.0f, 0.9f);
        Vector3f light2Direction  = new Vector3f(-1.0f, -1.0f, -1.0f);

        DirectionalLight light1
            = new DirectionalLight(light1Color, light1Direction);
        light1.setInfluencingBounds(bounds);
        objRoot.addChild(light1);
          
        DirectionalLight light2
            = new DirectionalLight(light2Color, light2Direction);
        light2.setInfluencingBounds(bounds);
        objRoot.addChild(light2);

        apText.setMaterial(mm);

        // Have Java 3D perform optimizations on this scene graph.
        objRoot.compile();

	return objRoot;
    }

    public OrientedPtTest() {
    }

    public OrientedPtTest(java.net.URL earthURL, java.net.URL stoneURL) {
        earthImage = earthURL;
	stoneImage = stoneURL;
    }
      
    public void init() {
        // the paths to the image files for an applet
        earthImage = Resources.getResource("resources/images/earth.jpg");
        if (earthImage == null) {
            System.err.println("resources/images/earth.jpg not found");
            System.exit(1);
        }

        stoneImage = Resources.getResource("resources/images/stone.jpg");
        if (stoneImage == null) {
            System.err.println("resources/images/stone.jpg not found");
            System.exit(1);
        }
      
	setLayout(new BorderLayout());
	Canvas3D c = new Canvas3D(SimpleUniverse.getPreferredConfiguration());
	add("Center", c);

	// Create a simple scene and attach it to the virtual universe
	BranchGroup scene = createSceneGraph();
	u = new SimpleUniverse(c);

	// add mouse behaviors to the ViewingPlatform
	ViewingPlatform viewingPlatform = u.getViewingPlatform();

        // This will move the ViewPlatform back a bit so the
        // objects in the scene can be viewed.
        u.getViewingPlatform().setNominalViewingTransform();

	// add orbit behavior to the viewing platform
	OrbitBehavior orbit = new OrbitBehavior(c, OrbitBehavior.REVERSE_ALL);
	BoundingSphere bounds =
	    new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
	orbit.setSchedulingBounds(bounds);
	viewingPlatform.setViewPlatformBehavior(orbit);

	u.addBranchGraph(scene);
    }

    public void destroy() {
	u.cleanup();
    }

    //
    // The following allows OrientedPtTest to be run as an application
    // as well as an applet
    //
    public static void main(String[] args) {
        java.net.URL earthURL = null;
	java.net.URL stoneURL = null;
        earthURL = Resources.getResource("resources/images/earth.jpg");
        if (earthURL == null) {
            System.err.println("resources/images/earth.jpg not found");
            System.exit(1);
        }

        stoneURL = Resources.getResource("resources/images/stone.jpg");
        if (stoneURL == null) {
            System.err.println("resources/images/stone.jpg not found");
            System.exit(1);
        }
	    
	new MainFrame(new OrientedPtTest(earthURL, stoneURL), 400, 400);
    }
}