color.java

有关于java 3D的一些编程

import java.applet.Applet; 
import java.awt.BorderLayout; 
import com.sun.j3d.utils.applet.MainFrame; 
import com.sun.j3d.utils.image.TextureLoader; 
import com.sun.j3d.utils.universe.*; 
import com.sun.j3d.utils.geometry.*; 
import javax.media.j3d.*;
import javax.media.j3d.Canvas3D;
import javax.vecmath.*; 
import java.awt.GraphicsConfiguration;

public class Color extends Applet { 

    private BranchGroup createSceneGraph() { 
           BranchGroup objRoot = new BranchGroup(); 
           objRoot.addChild(createObject()); 
           Color3f bgColor = new Color3f(1.0f, 1.0f, 1.0f); 
      BoundingSphere bounds=new BoundingSphere(new Point3d(0.0,0.0,0.0
),100.0); 
           Background bg = new Background(bgColor); 
           bg.setApplicationBounds(bounds); 
           objRoot.addChild(bg); 

       Color3f light1Color = new Color3f(1.0f, 1.0f, 1.0f); 
       Vector3f light1Direction  = new Vector3f(4.0f, -7.0f, -12.0f); 
  
      DirectionalLight light1 
            = new DirectionalLight(light1Color, light1Direction); 
      light1.setInfluencingBounds(bounds); 

      objRoot.addChild(light1); 

      objRoot.compile(); 
      return objRoot; 
    } 

    private Group createObject() { 
        Transform3D t = new Transform3D(); 
        TransformGroup objTrans = new TransformGroup(t); 
        objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE); 


        Appearance ap=new Appearance(); 
        ap.setCapability(Appearance.ALLOW_MATERIAL_WRITE); 
        ap.setCapability(Appearance.ALLOW_COLORING_ATTRIBUTES_WRITE); 

         Material mat = new Material( ); 
         mat.setCapability(Material.ALLOW_COMPONENT_WRITE); 
         Color3f emissive = new Color3f(0.0f, 1.0f, 0.0f); 
         Color3f diffuse   = new Color3f(0.0f, 0.0f, 1.0f); 
         mat.setEmissiveColor(emissive); 
         mat.setDiffuseColor(diffuse);             
         ap.setMaterial(mat);           

      PolygonAttributes pa = new PolygonAttributes(); 
          pa.setCullFace(PolygonAttributes.CULL_NONE); 
      ap.setPolygonAttributes(pa); 

      ColoringAttributes ca = new ColoringAttributes( ); 
        ca.setCapability(ColoringAttributes.ALLOW_COLOR_WRITE); 
      ap.setColoringAttributes( ca); 
               
      Alpha alpha = new Alpha(-1, 
             Alpha.INCREASING_ENABLE|Alpha.DECREASING_ENABLE, 
             0, 0, 8000, 0, 0, 8000, 0, 0); 
      ColorInterpolator  ci = new ColorInterpolator(alpha, mat, 
                      new Color3f(1.0f,0.0f, 1.0f), new Color3f(0.0f, 
0.0f, 1.0f)); 
     
      BoundingSphere bounds=new BoundingSphere(new Point3d(0.0,0.0,0.0
),100.0); 
      ci.setSchedulingBounds(bounds); 

        Shape3D shape = new Shape3D(); 
        shape.setCapability(Shape3D.ALLOW_APPEARANCE_WRITE); 
        shape.setAppearance(ap); 
        objTrans.addChild(shape); 
   
        Transform3D yAxis = new Transform3D(); 
        Alpha rotationAlpha = new Alpha(-1, Alpha.INCREASING_ENABLE, 
                       0, 0, 4000, 0, 0, 0, 0, 0); 

        RotationInterpolator rotator = 
            new RotationInterpolator(rotationAlpha, objTrans, yAxis, 
                                     0.0f, (float) Math.PI*2.0f); 
        rotator.setSchedulingBounds(bounds); 
        objTrans.addChild(rotator); 
         
return objTrans; 
    } 

    public Color() { 
      setLayout(new BorderLayout()); 
     GraphicsConfiguration config=SimpleUniverse.getPreferredConfiguration(); 
      Canvas3D c = new Canvas3D(config); 
      add("Center", c); 

BranchGroup scene = createSceneGraph(); 
SimpleUniverse u = new SimpleUniverse(); 
        u.getViewingPlatform().setNominalViewingTransform(); 

u.addBranchGraph(scene); 
    } 

    public static void main(String[] args) { 
        new MainFrame(new Color(), 540,361); 
    } 
}