Drag and drop dans une JPanel

Version imprimable

1 pièce(s) jointe(s)

Bonjour,

Mon souci (j'ai cherché des sources sur le net sans succès) est de déplacer un Poin3D dans une visualisation 2D par Drag and Drop.
Un ZBuffer dessine les objets. Les points de contrôles sont affichés en surimpression.
Deux fonctionalités que je cherche à implémenter:

1) Drag and drop de points. Comment sélectionner le point et faire la transition. Au moment du drop comment mettre les coordonnées du point dans le plan de la caméra (de 2D à 3D)
2) Sélectionner un point sur un objet (courbe, surface) et faire tourner l'objet autour du point.

https://github.com/manuelddahmen/e3gui

Code:

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        addMouseMotionListener(new MouseMotionListener() {
            public Point3D mousePoint3D;
            Point mousePoint = null;
 
            @Override
            public void mouseDragged(MouseEvent e) {
                if (main.getUpdateView().getzRunner().isGraphicalEditing()) {
 
                    if (cellList != null)
                        cellList.forEach(cell -> {
                            Point point = getzRunner().getzBuffer().coordonneesPoint2D((Point3D) cell.o);
                            if (e.getX() - 1 > point.getX() && e.getX()+1 < point.getX() 
                                    && e.getY() - 1 > point.getY() && e.getY()+1 < point.getY()) {
                                mousePoint = point;
                                mousePoint3D = (Point3D) cell.o;
                            }
                        });
 
                }
            }
 
            @Override
            public void mouseMoved(MouseEvent e) {
                if (mousePoint3D != null) {
                    mousePoint3D.changeTo(getzRunner().getzBuffer().invert((int) e.getPoint().getX(), (int) e.getPoint().getY(), mousePoint3D.getZ()));
                }
 
 
            }
        });

Pièce jointe 513661

Donc je simplifie ma question qui se résout à un problème de math.

Camera.calculerPoint2D(Point3D p) : p2 # donne les coordonnées du point à l'écran grâce à la matrice m (P2 = m*p)
ZBuffer.invert(int x, int y, Point3D p0, Camera c) : p3 coordonnées du point Point3D déplacé à l'aide de la souris dans le plan de p0 perpendiculairement au plan de la caméra.
Code:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 public Point3D invert(int x, int y, Point3D orig, Camera camera) { x = (x-largeur()/2); y = (y-hauteur()/2); double dist = orig.moins(camera.getEye()).norme(); double pX = Math.cos(camera.getAngleX())*dist; double pY = Math.cos(camera.getAngleY())*dist; return camera.getMatrice().tild().mult(new Point3D( pX*2.0*x/largeur(), -pY*2.0*y/hauteur(), orig.getZ() )); }

Solution

Code:

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       addMouseListener(new MouseAdapter() {
            public Representable representable;
            public ThreadDrawing threadDrawing;
            Point3D mousePoint3D;
            Point mousePoint = null;
            ArcBall arcBall;
 
            class ThreadDrawing extends Thread {
                boolean running;
                private boolean pause = false;
 
                public void run() {
                    running = true;
                         while (!isRunning()) {
                             while (isPause()) {
                                 try {
                                     Thread.sleep(100);
                                 } catch (InterruptedException e) {
                                     e.printStackTrace();
                                 }
                             }
                            Point location = MouseInfo.getPointerInfo().getLocation();
                            SwingUtilities.convertPointFromScreen(location, main.getUpdateView());
                            mousePoint = location;
                            try {
                                if (main.isSelectAndRotate()) {
                                    arcBall.arcball_move((int) mousePoint.getX(), (int) mousePoint.getY());
                                    //System.out.println(arcBall.ab_curr);
                                } else
                                    drawPoint(mousePoint);
                            } catch (ArrayIndexOutOfBoundsException ex) {
                            }
                        }
 
                }
 
                private boolean isRunning() {
                    return running;
                }
 
                public void setRunning(boolean running) {
                    this.running = running;
                }
 
                public boolean isPause() {
                    return pause;
                }
            }
 
 
            @Override
            public void mousePressed(MouseEvent e) {
                System.out.println("Mouse Pressed");
                if (main.isSelectAndRotate()) {
                    System.out.println("Mouse starts dragging rotating");
                    arcBall = new ArcBall();
                    representable = zRunner.getzBuffer().representableAt(e.getX(), e.getY());
                    arcBall.arcball_init(representable);
                    //System.out.println("Representable: " + representable);
                    arcBall.arcball_setzoom(10.0, main.getUpdateView().getzRunner().getzBuffer().camera().eye(),
                            main.getUpdateView().getzRunner().getzBuffer().camera().getVerticale().getElem());
                    arcBall.arcball_start(e.getX(), e.getY());
                    if (threadDrawing == null) {
                        threadDrawing = new ThreadDrawing();
                        threadDrawing.start();
                    }
                } else if (main.getUpdateView().getzRunner().isGraphicalEditing()) {
                    List<ModelBrowser.Cell> cellList;
                    cellList = new ModelBrowser(main.getDataModel().getScene(), Point3D.class).getObjects();
                    if (cellList != null)
                        cellList.forEach(cell -> {
                            Point point = getzRunner().getzBuffer().camera().coordonneesPoint2D((Point3D) cell.o
                            ,
                                    getzRunner().getzBuffer());
                            if (e != null && point != null &&
                                    e.getX() - 2 < point.getX() && e.getX() + 2 > point.getX()
                                    && e.getY() - 2 < point.getY() && e.getY() + 2 > point.getY()) {
                                mousePoint = point;
                                mousePoint3D = (Point3D) cell.o;
                                if (threadDrawing == null) {
                                    threadDrawing = new ThreadDrawing();
                                    threadDrawing.start();
                                }
                            }
                        });
 
                }
            }
 
 
            @Override
            public void mouseReleased(MouseEvent e) {
                System.out.println("Mouse Released");
                if (main.getUpdateView().getzRunner().isGraphicalEditing()) {
                    if (mousePoint3D != null) {
                        mousePoint3D.changeTo(getzRunner().getzBuffer().invert((int) e.getPoint().getX(), (int) e.getPoint().getY(), mousePoint3D, getzRunner().getzBuffer().camera()));
                    }
                    System.out.println(mousePoint3D);
                }
                if (threadDrawing != null) {
                    threadDrawing.setRunning(false);
                    threadDrawing = null;
                }
                mousePoint3D = null;
                mousePoint = null;
            }
        });