La sélection d'objets en Java 3D

RETOUR

SimplePicking.java

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

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

public class SimplePicking extends Applet {

  public BranchGroup createSceneGraph(Canvas3D canvas) {
    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 objTrans = new TransformGroup();
      objRoot.addChild(objTrans);
      Transform3D t1 = new Transform3D();
      t1.setTranslation(new Vector3d(-0.7,0.0,0.0)) ;
      objTrans.setTransform(t1);
      TransformGroup objTrans2 = new TransformGroup();
      objTrans.addChild(objTrans2);
      objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
      objTrans2.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
      Appearance a = new Appearance();
      Material m = new Material();
      a.setMaterial(m);
      Sphere s = new Sphere(0.18F,Sphere.GENERATE_NORMALS|Sphere.ENABLE_GEOMETRY_PICKING,70,a);
      s.setCapability(Geometry.ALLOW_INTERSECT);
      objTrans2.addChild(s); }
    { TransformGroup objTrans = new TransformGroup();
      objRoot.addChild(objTrans);
      Transform3D t1 = new Transform3D();
      t1.setTranslation(new Vector3d(-0.25,0.0,0.0)) ;
      objTrans.setTransform(t1);
      TransformGroup objTrans2 = new TransformGroup();
      objTrans.addChild(objTrans2);
      objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
      objTrans2.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
      Appearance a = new Appearance();
      Material m = new Material();
      m.setDiffuseColor(0.5f,1.0f,0.2f);
      m.setAmbientColor(0.5f,0.6f,0.8f);
      a.setMaterial(m);
      Cone c = new Cone(0.14F,0.28F,Cone.GENERATE_NORMALS|Cone.ENABLE_GEOMETRY_PICKING,50,50,a);
      c.setCapability(Geometry.ALLOW_INTERSECT);
      objTrans2.addChild(c); }
    { TransformGroup objTrans = new TransformGroup();
      objRoot.addChild(objTrans);
      Transform3D t1 = new Transform3D();
      t1.setTranslation(new Vector3d(0.25,0.0,0.0)) ;
      objTrans.setTransform(t1);
      TransformGroup objTrans2 = new TransformGroup();
      objTrans.addChild(objTrans2);
      objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
      objTrans2.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
      Appearance a = new Appearance();
      Material m = new Material();
      m.setDiffuseColor(0.1f,0.1f,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);
      Cylinder c = new Cylinder(0.14F,0.28F,Cylinder.GENERATE_NORMALS|Cylinder.ENABLE_GEOMETRY_PICKING,50,50,a);
      c.setCapability(Geometry.ALLOW_INTERSECT);
      objTrans2.addChild(c); }
    { TransformGroup objTrans = new TransformGroup();
      objRoot.addChild(objTrans);
      Transform3D t1 = new Transform3D();
      t1.setTranslation(new Vector3d(0.7,0.0,0.0)) ;
      objTrans.setTransform(t1);
      TransformGroup objTrans2 = new TransformGroup();
      objTrans.addChild(objTrans2);
      objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
      objTrans2.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
      objTrans2.setCapability(TransformGroup.ENABLE_PICK_REPORTING);
      Appearance a = new Appearance();
      Material m = new Material();
      m.setDiffuseColor(0.9f,0.8f,0.4f);
      m.setAmbientColor(0.6f,0.0f,0.6f);
      a.setMaterial(m);
      Box b = new Box(0.05F,0.13F,0.22F,Box.GENERATE_NORMALS|Box.ENABLE_GEOMETRY_PICKING,a);
      b.setCapability(Geometry.ALLOW_INTERSECT);
      objTrans2.addChild(b); }
    PickRotateBehavior behavior1 =
new PickRotateBehavior(objRoot, canvas, bounds);
    behavior1.setMode(PickTool.GEOMETRY);
    objRoot.addChild(behavior1);
    PickZoomBehavior behavior2 =
new PickZoomBehavior(objRoot, canvas, bounds);
    behavior2.setMode(PickTool.GEOMETRY);
    objRoot.addChild(behavior2);
    PickTranslateBehavior behavior3 =
new PickTranslateBehavior(objRoot, canvas, bounds);
    behavior3.setMode(PickTool.GEOMETRY);
    objRoot.addChild(behavior3);
    objRoot.compile();
    return objRoot;
    }

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

  public static void main(String[] args) {
    new MainFrame(new SimplePicking(),600,150);
    }
  }

RETOUR

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