Une animation
sans double buffer

RETOUR

SimpleDoubleBuffer.java

/* Auteur: Nicolas JANEY         */
/* nicolas.janey@univ-fcomte.fr  */
/* Novembre 2001                 */

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

public class SimpleDoubleBuffer extends Applet {

  public BranchGroup createSceneGraph(SimpleUniverse u) {
    BranchGroup objRoot = new BranchGroup();
    BoundingSphere bounds;
    bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
    Vector3f ldir = new Vector3f(1.0F,1.0F,-1.0F);
    Color3f lcouldl = new Color3f(1.0F,1.0F,1.0F);
    DirectionalLight dl = new DirectionalLight(lcouldl,ldir);
    dl.setInfluencingBounds(bounds);
    objRoot.addChild(dl);
    Color3f lcoulal = new Color3f(0.3F,0.3F,0.1F);
    AmbientLight al = new AmbientLight(lcoulal);
    al.setInfluencingBounds(bounds);
    objRoot.addChild(al);
    { TransformGroup objTrans1 = new TransformGroup();
      objRoot.addChild(objTrans1);
      objTrans1.setCapability(
        TransformGroup.ALLOW_TRANSFORM_WRITE);
      Transform3D yAxis = new Transform3D();
      Alpha rotationAlpha;
      rotationAlpha = new Alpha(-1,
                        Alpha.INCREASING_ENABLE,
                        0,0,
                        4000,0,0,
                        0,0,0);
      RotationInterpolator rotator;
      rotator = new RotationInterpolator(
                  rotationAlpha,
                  objTrans1,yAxis,
                  0.0f,
                  (float) Math.PI*2.0f);
      rotator.setSchedulingBounds(bounds);
      objTrans1.addChild(rotator);
      Appearance a = new Appearance();
      Material m = new Material();
      m.setDiffuseColor(0.1f,0.9f,0.9f);
      m.setSpecularColor(1.0f,0.0f,0.0f);
      m.setAmbientColor(0.9f,0.9f,0.9f);
      m.setShininess(25.0f);
      a.setMaterial(m);
      TransformGroup objTrans2 = new TransformGroup();
      objTrans1.addChild(objTrans2);
      Transform3D t3D = new Transform3D();
      t3D.setRotation(new AxisAngle4d(1.0,1.0,0.0,Math.PI/5.0)) ;
      objTrans2.setTransform(t3D);
      objTrans2.addChild(new Cylinder(0.5F,1.0F,1,70,70,a)); }
    objRoot.compile();
    return objRoot;
    }

  public SimpleDoubleBuffer() {
    setLayout(new BorderLayout());
    GraphicsConfiguration config;
    config = SimpleUniverse.getPreferredConfiguration();
    Canvas3D c = new Canvas3D(config);
    c.setDoubleBufferEnable(false);
    add("Center",c);
    SimpleUniverse u = new SimpleUniverse(c);
    BranchGroup scene = createSceneGraph(u);
    u.getViewingPlatform().setNominalViewingTransform();
    u.addBranchGraph(scene);
    }

  public static void main(String[] args) {
    new MainFrame(new SimpleDoubleBuffer(),300,250);
    }
  }

RETOUR

Remarques,erreurs
nicolas.janey@univ-fcomte.fr