simpleinterpolator.java

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//SimpleInterpolator.java
//演示如何使用Interpolator来制作动画

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import com.sun.j3d.utils.applet.MainFrame; 
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.geometry.ColorCube;
import javax.media.j3d.*;
import javax.vecmath.*;

import com.sun.j3d.utils.image.TextureLoader;
import com.sun.j3d.utils.geometry.Box;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.behaviors.interpolators.*;



public class SimpleInterpolator extends Applet {

 
    public BranchGroup createSceneGraph() {
	// Create the root of the branch graph
		BranchGroup objRoot = new BranchGroup();
        Transform3D t3d = new Transform3D();
        BoundingSphere bounds = new BoundingSphere();

        // create target TransformGroup with Capabilities
        TransformGroup objMove1 = new TransformGroup();
        objMove1.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		
		Alpha alpha1 = new Alpha (-1,
                                 Alpha.INCREASING_ENABLE + Alpha.DECREASING_ENABLE,
                                 0, 0, 2000, 0, 1000, 2000, 0, 1000);

        // create position interpolator
        PositionInterpolator posInt1 = new PositionInterpolator (alpha1, objMove1);
        posInt1.setSchedulingBounds(bounds);
        posInt1.setStartPosition(-1.0f);
		
		 t3d.setTranslation(new Vector3f(0.0f, 0.5f, 0.0f));
        TransformGroup objMovePos1 = new TransformGroup(t3d);
        objRoot.addChild(objMovePos1);
        objMovePos1.addChild(objMove1);
		objMove1.addChild(new ColorCube(0.1f));
        objRoot.addChild(posInt1);
		
		TransformGroup objMove2 = new TransformGroup();
        objMove2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		
		Alpha alpha2 = new Alpha (-1,
                                 Alpha.INCREASING_ENABLE + Alpha.DECREASING_ENABLE,
                                 0, 0, 2000, 1800, 1000, 2000, 1800, 1000);

        // create position interpolator
        PositionInterpolator posInt2 = new PositionInterpolator (alpha2, objMove2);
        posInt2.setSchedulingBounds(bounds);
        posInt2.setStartPosition(-1.0f);
		
		t3d.setTranslation(new Vector3f(0.0f, 0.0f, 0.0f));
        TransformGroup objMovePos2 = new TransformGroup(t3d);
        objRoot.addChild(objMovePos2);
        objMovePos2.addChild(objMove2);
		objMove2.addChild(new ColorCube(0.1f));
        objRoot.addChild(posInt2);
		
		TransformGroup objMove3 = new TransformGroup();
        objMove3.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		
		Alpha alpha3 = new Alpha (-1,
                                 Alpha.INCREASING_ENABLE + Alpha.DECREASING_ENABLE,
                                 0, 0, 2000, 600, 1000, 2000, 600, 1000);

        // create position interpolator
        PositionInterpolator posInt3 = new PositionInterpolator (alpha3, objMove3);
        posInt3.setSchedulingBounds(bounds);
        posInt3.setStartPosition(-1.0f);
		
		t3d.setTranslation(new Vector3f(0.0f,-0.5f, 0.0f));
        TransformGroup objMovePos3 = new TransformGroup(t3d);
        objRoot.addChild(objMovePos3);
        objMovePos3.addChild(objMove3);
		objMove3.addChild(new ColorCube(0.1f));
        objRoot.addChild(posInt3);

 
		
		// create target TransformGroup with Capabilities
/*       TransformGroup objRotate = new TransformGroup();
        objRotate.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
       // create rotation interpolator
		Alpha alpha = new Alpha (-1,
                                 Alpha.INCREASING_ENABLE + Alpha.DECREASING_ENABLE,
                                 0, 0, 2000, 0, 1000, 2000, 0, 1000);

        RotationInterpolator rotInt = new RotationInterpolator (alpha, objRotate);
        rotInt.setSchedulingBounds(bounds);
		objRoot.addChild(rotInt);
		
		t3d.setTranslation(new Vector3f(0.0f, 0.0f, 0.0f));
		TransformGroup objRotPos = new TransformGroup(t3d);
	    objRoot.addChild(objRotPos);
		objRotPos.addChild(objRotate);
		objRotate.addChild(new ColorCube(0.1));
		
		t3d.setTranslation(new Vector3f(0.5f, 0.0f, 0.0f));
		TransformGroup objRotPosOut = new TransformGroup(t3d);
		objRotPosOut.addChild(new ColorCube(0.1));
		objRotate.addChild(objRotPosOut);
*/	  
/*		Color3f white = new Color3f(1.0f, 1.0f, 1.0f);
		Color3f yellow   = new Color3f(1.0f, 1.0f, 0.0f);
		Color3f cyan  = new Color3f(0.0f, 1.0f, 1.0f);
		Color3f megenta= new Color3f(1.0f,0.0f,1.0f);
		Color3f red	= new Color3f(1.0f,0.0f,0.0f);

		String filename="flower2.jpg";
		TextureLoader myLoader=new TextureLoader (filename,this);
		ImageComponent2D myImage=myLoader.getImage ();
		Texture2D myTex=(Texture2D)myLoader.getTexture();

		// Create appearance object for textured cube
		Appearance app = new Appearance();
//		app.setCapability(Appearance.ALLOW_MATERIAL_WRITE );
		app.setTexture(myTex);
		
		Material mat = new Material();
		mat.setCapability(Material.ALLOW_COMPONENT_WRITE);
//      mat.setDiffuseColor(cyan);
        mat.setSpecularColor(white);
        mat.setShininess(128);
		app.setMaterial (mat);

		TextureAttributes texAttr = new TextureAttributes();
//		texAttr.setCapability(TextureAttributes.ALLOW_TRANSFORM_WRITE |TextureAttributes.ALLOW_BLEND_COLOR_WRITE);
		texAttr.setTextureMode(TextureAttributes.BLEND );
		texAttr.setTextureBlendColor (new Color4f(0.9f,0.9f,0.9f,0.1f));
		app.setTextureAttributes(texAttr);
		
		Alpha alpha = new Alpha (-1,
                                 Alpha.INCREASING_ENABLE + Alpha.DECREASING_ENABLE,
                                 0, 0, 2000, 0, 1000, 2000, 0, 1000);
		ColorInterpolator colInt = new ColorInterpolator (alpha, mat);
        colInt.setStartColor(cyan);
        colInt.setEndColor(megenta);
        colInt.setSchedulingBounds(bounds);
		objRoot.addChild(colInt);

		
		Box myBox = new Box(0.4f, 0.4f, 0.4f,
								  Box.GENERATE_TEXTURE_COORDS
								  |Box.GENERATE_NORMALS , app);
//		myBox.setCapability(Box.ENABLE_APPEARANCE_MODIFY);
		objRoot.addChild(myBox);
		
		DirectionalLight lightD1 = new DirectionalLight();
		lightD1.setDirection(new Vector3f(0.0f,-1.0f,-1.0f));
		lightD1.setColor(white);
		lightD1.setInfluencingBounds(bounds);
		objRoot.addChild(lightD1);
*/		
		
        // create target TransformGroup with Capabilities
/*        TransformGroup objScale = new TransformGroup();
        objScale.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
		Alpha alpha = new Alpha (-1,
                                 Alpha.INCREASING_ENABLE + Alpha.DECREASING_ENABLE,
                                 0, 0, 2000, 0, 1000, 2000, 0, 1000);
		 // create scale interpolator
		ScaleInterpolator scaInt = new ScaleInterpolator (alpha, objScale);
        scaInt.setSchedulingBounds(bounds);
		
		t3d.setTranslation(new Vector3f(-0.4f, -0.4f, 0.0f));
		TransformGroup objScalePos = new TransformGroup(t3d);
		objRoot.addChild(objScalePos);
		objScalePos.addChild(objScale);
		objScale.addChild(new ColorCube(0.4));
		objRoot.addChild(scaInt);
*/
		
		
  // create target Switch with Capabilities
/*        Switch objSwitch = new Switch();
        objSwitch.setCapability(Switch.ALLOW_SWITCH_WRITE);
		objSwitch.addChild(new Sphere(0.4f));
        objSwitch.addChild(new ColorCube(0.4f));
		Alpha alpha = new Alpha (-1,
                                 Alpha.INCREASING_ENABLE + Alpha.DECREASING_ENABLE,
                                 0, 0, 2000, 0, 1000, 2000, 0, 1000);
		
		       // create switch value interpolator
		SwitchValueInterpolator swiInt = new SwitchValueInterpolator (alpha, objSwitch);
		swiInt.setSchedulingBounds(bounds);
        swiInt.setLastChildIndex(1);// since switch made after interpolator
	   
        t3d.setTranslation(new Vector3f(0.0f, 0.0f, 0.0f));
        TransformGroup objSwitchPos = new TransformGroup(t3d);
        objRoot.addChild(objSwitchPos);
        objSwitchPos.addChild(objSwitch);
       objRoot.addChild(swiInt);
*/


/*		Color3f white = new Color3f(1.0f, 1.0f, 1.0f);
		Color3f cyan  = new Color3f(0.0f, 1.0f, 1.0f);
		Appearance transpAppear = new Appearance();
		Material mat = new Material();
	    mat.setDiffuseColor(cyan);
        mat.setSpecularColor(white);
        mat.setShininess(128);
		transpAppear.setMaterial (mat);
        // create target Transparency with Capabilities
        TransparencyAttributes objTransp = new TransparencyAttributes();
        objTransp.setCapability(TransparencyAttributes.ALLOW_VALUE_WRITE);
        objTransp.setTransparencyMode(TransparencyAttributes.BLENDED);
		transpAppear.setTransparencyAttributes(objTransp);
		Alpha alpha = new Alpha (-1,
                                 Alpha.INCREASING_ENABLE + Alpha.DECREASING_ENABLE,
                                 0, 0, 2000, 0, 1000, 2000, 0, 1000);
        TransparencyInterpolator traInt = new TransparencyInterpolator (alpha, objTransp);
        traInt.setSchedulingBounds(bounds);
		t3d.setTranslation(new Vector3f(0.0f, 0.0f, 0.0f));
        TransformGroup objTranspPos = new TransformGroup(t3d);