src/j3d/Canvas3DSW.java

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOUSE. See the GNU
 * General Public License for more details.
 *
 * You should have recieved a copy of the GNU General Public License
 * along with this program; if not write to the Free Software
 * Foundation, inc., 59 Temple Place, Suite 330, Boston MA 02111-1307
 * USA
 */
package j3d;


import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.*;
import java.io.*;
import java.util.*;

import javax.swing.*;
import javax.swing.tree.*;

import util.QSortZ;

import gui.PreProcessor;
import util.PngEncoderB;
/**
 * Insert the type's description here.
 *
 * @author: Yuriy Mikhaylovskiy, Jonas Forssell
 */

public class Canvas3DSW extends JPanel implements Canvas3D, Serializable {
  private DefaultMutableTreeNode treeNode = new DefaultMutableTreeNode();
  public DefaultTreeModel tree3d = new DefaultTreeModel(treeNode);
  private BufferedImage offscreen;
  private Graphics2D  offgraphics;
  boolean painted = false;
  private Vector obj3d = new Vector();
  private Vector shp3d = new Vector();
  private int id_obj3d=0;
  public Matrix3D VMatrix3D = new Matrix3D();
  public Vector3D center_of_rotation = new Vector3D();
  public JLabel coodinates = new JLabel();
  private QSortZ qsort = new QSortZ();
  private int x,y,x0,y0;
  private PreProcessor pre;
  private boolean show = true;
//
  public boolean DRAFTMODE=false;
  public Color BGCOLOR = Color.white;
  public byte GRAPHICSMODE=2;
  public Color GRIDCOLOR=Color.black;
  public float GRIDLEVEL=0;
  public byte GRIDPLANE=0;
  public boolean GRIDMODE=true;
  public float GRIDSIZE=10;
  public float[] LIMITS={0,0,210,297};
  public byte RENDERMODE=2;
  public boolean SHOW_ID_NODE=false;
  public boolean SHOW_ID_ELEMENT=false;
  public boolean SHOW_ID_CONSTRAINTS=true;
  public boolean SHOW_ID_LOADS=true;
  public boolean SHOW_ID_TRACKERS=true;
  public boolean SHOW_ID_MATERIALS=true;
  public int POINTSIZE=8;
  public int NODESIZE=6;
  public Color STLCOLOR=new Color(0.7f,0.7f,0.7f);
  private boolean DRAG = false;
  // Codes for handling of geometry
  public float GeometricTolerance = 0.01f; // Tolerance for calculation of geometry
  public float NODE_MERGE_TOLERANCE = 1e-3F;
//
  private _Group nodes, elements, geometry;


  public Canvas3DSW(PreProcessor pre) {
    this.pre = pre;

    createGroups();

    addComponentListener(new ComponentAdapter() {
      public void componentResized(ComponentEvent e) {
        offscreen=null;
      }
    });

    addMouseListener(new MouseAdapter() {

        public void mousePressed(MouseEvent e) {
        int mod = e.getModifiers();
        x=e.getX(); y=e.getY();
        x0 = x; y0 = y;
      }

        public void mouseReleased(MouseEvent e) {
            int mod = e.getModifiers();
            if (((mod & InputEvent.BUTTON1_MASK) == InputEvent.BUTTON1_MASK) && DRAG == true) {
                boxSelect(Math.min(x0,x),Math.min(y0,y),Math.max(x0,x),Math.max(y0,y));

                view_reset();
            }

        DRAG = false;
        DRAFTMODE = false;
      }

        public void mouseClicked(MouseEvent e) {
            int mod = e.getModifiers();
            if((((mod & InputEvent.BUTTON1_MASK) == InputEvent.BUTTON1_MASK) && ((mod & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK)) || ((mod & InputEvent.BUTTON1_MASK) == InputEvent.BUTTON1_MASK)){
                if (!e.isControlDown()) {
                    clearSelectOnAllObjects3D();
                    clearTree();
                }

                setPickedObject(e.getX(), e.getY());

                view_reset();

                if (e.getClickCount() == 2)
                    showEditPanel(e);

                requestAction();
            }

            if(((mod & InputEvent.BUTTON2_MASK) == InputEvent.BUTTON2_MASK)){
                 view_all();
            }
        }
    });

    addMouseMotionListener(new MouseMotionAdapter() {

        public void mouseMoved(MouseEvent e) {
            coodinates.setText(e.getX()+","+e.getY());
        }

        public void mouseDragged(MouseEvent e) {
            if(e.getModifiers() == MouseEvent.BUTTON1_MASK)
                DRAG = true;
            else
                DRAFTMODE = true;
            this_mouseDragged(e);
        }
    });

    VMatrix3D.translate(400,-300,0);
    VMatrix3D.scale(1,-1,1);
    view_grid();
  }


private void createGroups() {
    nodes = new _Group(false, true);
    nodes.setName("Node");
    elements = new _Group(false, true);
    elements.setName("Elem");
    geometry = new _Group(false, true);
    geometry.setName("Geo");

    this.add3D(nodes);
    this.add3D(elements);
    this.add3D(geometry);
}


  private synchronized void setPainted(){
    painted = true;
    notifyAll();
  }

  public synchronized void paint(Graphics g){
      shp tmp;

    if (offscreen == null){
      if (offgraphics != null) offgraphics.dispose();
      if (offscreen != null) offscreen.flush();
      offscreen = (BufferedImage)createImage(getWidth(), getHeight());
      offgraphics = (Graphics2D)offscreen.getGraphics();
    }


    // Create background
    offgraphics.setColor(BGCOLOR);
    offgraphics.fillRect(0, 0, getWidth(), getHeight());

    // Draw each element
    for(int i=0; i<shp3d.size(); i++){
        tmp = (shp)shp3d.elementAt(i);
        if (tmp.isShow() == show)
            tmp.paint(offgraphics,this);
    }

    // Draw bounding box if used
    if (DRAG == true) {
        offgraphics.setColor(Color.RED);
        offgraphics.drawRect(Math.min(x0,x),Math.min(y0,y),Math.abs(x-x0),Math.abs(y-y0));
    }

    g.drawImage(offscreen, 0, 0,this);
    setPainted();
  }

  public void update(Graphics g){
    paint(g);
  }

  private synchronized void view_transform(){
    shp tmp;
    int count = shp3d.size();
    for(int i=0; i<count; i++) {
        tmp = (shp)shp3d.elementAt(i);
        if (tmp.isShow() == show)
            tmp.transform2D(VMatrix3D, center_of_rotation, this);
    }

    if (!DRAFTMODE)
        qsort.sort(shp3d);
  }

  public int add3D(Object obj){
    id_obj3d++;
    ((_Object)obj).set_Id(id_obj3d+"");

    try {
    ((_Object)obj).reset(true);
    } catch(Exception e1) {
        error(e1);
        return -1;
    }

    obj3d.addElement(obj);

    _Object [] o = new _Object[1];
    o[0] = (_Object)obj;

    if (obj instanceof _Node)
        nodes.addToGroup(o);
    else
        if (obj instanceof _Element)
            elements.addToGroup(o);
        else if (obj instanceof _Geometry)
            geometry.addToGroup(o);
        else {
            treeNode.add(((_Object)obj).get_TreeNode());
        }

    Object[] arr = ((_Object)obj).get_Array(this);
    for(int i=0; i<arr.length; i++){
      ((shp)arr[i]).transform2D(VMatrix3D, center_of_rotation, this);
      shp3d.addElement(arr[i]);
    }
    return id_obj3d;
  }

  private void clearTree() {
      if (pre != null) pre.clearTree();
  }

  private void showEditPanel(MouseEvent e) {
      if (pre != null) pre.showEditPanel(e);
  }

  private void setPickedObject(int x, int y) {
      int count = obj3d.size();
      _Object o;

      for (int i=0; i<count; i++) {
          o = ((_Object)obj3d.elementAt(i));
          if (o.isPickPoint(x,y,show,false))
              o.setSelected(true);
      }

      if (pre != null) pre.rescanTree();
  }


  private void boxSelect(int sx, int sy, int ex, int ey) {
      int count = obj3d.size();
      _Object o;

      Rectangle2D r = new Rectangle(sx,sy,ex-sx,ey-sy);

      for (int i=0; i<count; i++) {
          o = ((_Object)obj3d.elementAt(i));
          if (o.isPickPoint(r,show,false))
              o.setSelected(true);
      }

      if (pre != null) pre.rescanTree();
  }


  public _Object getSelectedObject3D(){
      _Object[] obj = getSelectedObjects3D();

      if(obj.length > 0) return obj[0];

      return null;
  }

  public _Object[] getSelectedObjects3D() {
      Vector v = new Vector();
      _Object o;
      _Object[] p;

      for (int i=0; i<obj3d.size(); i++) {
          o = ((_Object)obj3d.elementAt(i));
          if (o.isSelected())
              v.add(o);
      }

      p = new _Object[v.size()];
      for (int i=0; i<v.size(); i++)
          p[i] = (_Object)v.elementAt(i);

      return p;
  }

  public _Object[] getAllObjects3D() {
    _Object[] arr = new _Object[obj3d.size()];
    for(int i=0; i<obj3d.size(); i++) arr[i] = ((_Object)obj3d.elementAt(i));
    return arr;
  }

  public _Node[] getAllNodes3D() {
      Vector arr = new Vector();
      _Object o;

      for(int i=0; i<obj3d.size(); i++) {
          o = ((_Object)obj3d.elementAt(i));
          if (o instanceof _Node)
              arr.add(o);
      }

      // Generate array
      _Node[] out = new _Node[arr.size()];
      for (int i=0; i<out.length; i++)
          out[i] = (_Node)arr.elementAt(i);

      return out;
  }

  public _Object[] getAllElements3D() {
      Vector arr = new Vector();
      _Object o;

      for(int i=0; i<obj3d.size(); i++) {
          o = ((_Object)obj3d.elementAt(i));
          if (o instanceof _Element)
              arr.add(o);
      }

      // Generate array
      _Object[] out = new _Object[arr.size()];
      for (int i=0; i<out.length; i++)
          out[i] = (_Element)arr.elementAt(i);

      return out;
  }

  public _Geometry[] getAllGeometry3D() {
      Vector arr = new Vector();
      _Object o;

      for(int i=0; i<obj3d.size(); i++) {
          o = ((_Object)obj3d.elementAt(i));
          if (o instanceof _Geometry)
              arr.add(o);
      }

      // Generate array
      _Geometry[] out = new _Geometry[arr.size()];
      for (int i=0; i<out.length; i++)
          out[i] = (_Geometry)arr.elementAt(i);

      return out;
  }

  public _Group[] getAllGroups3D() {
      Vector arr = new Vector();
      _Object o;

      for(int i=0; i<obj3d.size(); i++) {
          o = ((_Object)obj3d.elementAt(i));
          if (o instanceof _Group)
              arr.add(o);
      }

      _Group[] out = new _Group[arr.size()];
      for (int i=0; i<out.length; i++)
          out[i] = (_Group)arr.elementAt(i);

      return out;
  }


  public void remove_all(){
    id_obj3d=0;
    obj3d.removeAllElements();
    shp3d.removeAllElements();
    treeNode.removeAllChildren();
    this.createGroups();
    tree3d.reload();
    view_grid();
    repaint();
    painted=true;
  }
  public void clearSelectOnAllObjects3D(){
    int count = obj3d.size();
    for(int i=0; i<count; i++) ((_Object)obj3d.elementAt(i)).setSelected(false);
  }

  public void removeSelectedObjects3D(){
      _Object o;
      _Object[] s;
      /*
      treeNode.removeAllChildren();
      for(int i=0; i<obj3d.size(); i++) {
          o = (_Object)obj3d.elementAt(i);
          if(o.isSelected()){
              for (int j=0; j<obj3d.size(); j++)  // Remove from all groups
                  if (obj3d.elementAt(j) instanceof _Group)
                      ((_Group)obj3d.elementAt(j)).removeFromGroup(o);
              obj3d.removeElementAt(i);
              i--;
          } else
              treeNode.add(((_Object)obj3d.elementAt(i)).get_TreeNode());
      }
      tree3d.reload();
      view_reset();

      */

      // Deselect required elements
      for (int i=0; i<obj3d.size(); i++)
        ((_Object)obj3d.elementAt(i)).deselectRequiredObjects();

      // Remove selected objects from all groups
      s = this.getSelectedObjects3D();

      for (int i=0; i<obj3d.size(); i++) {
          o = (_Object)obj3d.elementAt(i);
          if (o instanceof _Group)
              ((_Group)o).removeFromGroup(s);
      }

      // Remove selected objects from j3d
      for (int i=0; i< obj3d.size(); i++) {
          o = (_Object)obj3d.elementAt(i);
          if (o.isSelected()) {
              obj3d.remove(i);
              i--;
          }
      }

      this.tree_reset();
      this.view_reset();

  }

  public void duplicate(){
      int count = obj3d.size();
      _Object o;
      Vector tmp = new Vector();

      for(int i=0; i<count; i++) {
          o = (_Object)obj3d.elementAt(i);
          if(o.isSelected()){
              tmp.add(o);
          }
      }

      for (int i=0; i<tmp.size(); i++)
          ((_Object)tmp.elementAt(i)).duplicate(this,true);

      tree3d.reload();
      view_reset();
    }

  public void transform3D(Matrix3D m){
    int count = obj3d.size();

    _Object[] p = getSelectedObjects3D();

    for (int i=0; i<p.length; i++)
        if (!p[i].isProcessed()) {
            p[i].transform3D(m);
            p[i].setProcessed(true);
        }


    for(int i=0; i<count; i++)
        ((_Object)obj3d.elementAt(i)).setProcessed(false);

    view_reset();
    view_repaint();
    tree_reset();

  }

  public void tree_reset(){
      _Object o;

      treeNode.removeAllChildren();
      int count = obj3d.size();
      for(int i=0; i<count; i++) {
          o = (_Object)obj3d.elementAt(i);
          if (o instanceof _Group)
              if (((_Group)o).isTopgroup())
                  treeNode.add(o.get_TreeNode());
      }

      tree3d.reload();
  }

  public synchronized void view_reset(){
    int count = obj3d.size();
    shp3d.removeAllElements();
    for(int i=0; i<count; i++){
      Object[] arr = ((_Object)obj3d.elementAt(i)).get_Array(this);
      for(int j=0; j<arr.length; j++){
        ((shp)arr[j]).transform2D(VMatrix3D, center_of_rotation, this);
        shp3d.addElement(arr[j]);
      }
    }
    view_grid();
  }

  public synchronized void view_repaint(){
    if(painted){
      painted = false;
      view_transform();
      repaint();
    }
  }

  public synchronized void view_translate(float dx, float dy, float dz){
    VMatrix3D.translate(dx,-dy,dz);
    view_repaint();
  }

  public synchronized void view_xrot(double theta){
    float dx = VMatrix3D.xo;
    float dy = VMatrix3D.yo;
    float dz = VMatrix3D.zo;
    VMatrix3D.translate(-dx,-dy,-dz);
    VMatrix3D.xrot(theta);
    VMatrix3D.translate(dx,dy,dz);
    view_repaint();
  }

  public synchronized void view_yrot(double theta){
    float dx = VMatrix3D.xo;
    float dy = VMatrix3D.yo;
    float dz = VMatrix3D.zo;
    VMatrix3D.translate(-dx,-dy,-dz);
    VMatrix3D.yrot(theta);
    VMatrix3D.translate(dx,dy,dz);
    view_repaint();
  }

  public synchronized void view_zrot(double theta){
    float dx = VMatrix3D.xo;
    float dy = VMatrix3D.yo;
    float dz = VMatrix3D.zo;
    VMatrix3D.translate(-dx,-dy,-dz);
    VMatrix3D.zrot(theta);
    VMatrix3D.translate(dx,dy,dz);
    view_repaint();
  }

  public synchronized void view_top(){
    VMatrix3D.view_top();
    view_repaint();
  }

  public synchronized void view_bottom(){
    VMatrix3D.view_bottom();
    view_repaint();
  }

  public synchronized void view_ne(){
    VMatrix3D.view_ne();
    view_repaint();
  }

  public synchronized void view_sw(){
    VMatrix3D.view_sw();
    view_repaint();
  }

  public synchronized void view_se(){
    VMatrix3D.view_se();
    view_repaint();
  }

  public synchronized void view_nw(){
    VMatrix3D.view_nw();
    view_repaint();
  }

  public synchronized void view_left(){
    VMatrix3D.view_left();
    view_repaint();
  }

  public synchronized void view_right(){
    VMatrix3D.view_right();
    view_repaint();
  }

  public synchronized void view_front(){
    VMatrix3D.view_front();
    view_repaint();
  }

  public synchronized void view_back(){
    VMatrix3D.view_back();
    view_repaint();
  }

  public synchronized void view_all(){

      int h = this.getHeight();
      int w = this.getWidth();
      shp shp;
      float[] bound;
      boolean zoomeable = false;

      float xmin = java.lang.Float.MAX_VALUE;
      float ymin = java.lang.Float.MAX_VALUE;
      float xmax = java.lang.Float.MIN_VALUE;
      float ymax = java.lang.Float.MIN_VALUE;

      for(int i=0; i<shp3d.size(); i++){
          try{
              shp = (shp)shp3d.elementAt(i);

              if (!(shp instanceof shpPointGrid) && !(shp instanceof shpOrientedText)) {

                  bound = shp.get2DBoundaries();
                  xmax = Math.max(xmax,bound[0]);
                  xmin = Math.min(xmin,bound[1]);
                  ymax = Math.max(ymax,bound[2]);
                  ymin = Math.min(ymin,bound[3]);

                  zoomeable = true;
              }
          }catch(Exception e){}
      }

      // Check if there is something to zoom around?
      if (zoomeable == false)
          return;

      double sw = w / (xmax-xmin);
      double sh = h / (ymax-ymin);
      double s = 0.8 * Math.min(sh,sw);

      view_scale((float)s);

      xmin = java.lang.Float.MAX_VALUE;
      ymin = java.lang.Float.MAX_VALUE;
      xmax = java.lang.Float.MIN_VALUE;
      ymax = java.lang.Float.MIN_VALUE;

      for(int i=0; i<shp3d.size(); i++){
          try{
              shp = (shp)shp3d.elementAt(i);

              if (!(shp instanceof shpPointGrid) && !(shp instanceof shpOrientedText)) {
                  bound = shp.get2DBoundaries();
                  xmax = Math.max(xmax,bound[0]);
                  xmin = Math.min(xmin,bound[1]);
                  ymax = Math.max(ymax,bound[2]);
                  ymin = Math.min(ymin,bound[3]);
              }
          }catch(Exception e){}
      }

      int mx = (int)((w / 2.0f) - (xmax+xmin) / 2.0f);
      int my = (int)((h / 2.0f) - (ymax+ymin) / 2.0f);

      this.view_translate(mx,-my,0);

      painted = true;
      view_repaint();

  }

  public synchronized boolean showhide() {

      _Object[] obj = this.getSelectedObjects3D();
      if (obj.length != 0)
          for (int i=0; i<obj.length; i++)
              obj[i].setShow(!show);
      else
          show = !show;

      clearSelectOnAllObjects3D();
      if (pre != null) pre.clearTree();
      view_reset();
      view_repaint();

      return show;
  }


  public synchronized void view_grid(){
    for(int i=0; i<shp3d.size(); i++){
      if(shp3d.elementAt(i) instanceof shpPointGrid){
        shp3d.removeElementAt(i);
        i--;
      }
    }
    if(GRIDMODE)for(float i=LIMITS[0]; i<=LIMITS[2]; i+=GRIDSIZE){
      for(float j=LIMITS[1]; j<=LIMITS[3]; j+=GRIDSIZE){
        float x,y,z;
        if(GRIDPLANE==GRIDPLANE_XY){
          x=i;
          y=j;
          z=GRIDLEVEL;
        }else if(GRIDPLANE==GRIDPLANE_YZ){
          x=GRIDLEVEL;
          y=j;
          z=i;
        }else{
          x=i;
          y=GRIDLEVEL;
          z=j;
        }
        shpPointGrid gp = new shpPointGrid(x,y,z,GRIDCOLOR);
        gp.setShow(show);
        gp.transform2D(VMatrix3D, center_of_rotation, this);
        shp3d.addElement(gp);
      }
    }
    shpXYZ xyz = new shpXYZ();
    xyz.transform2D(VMatrix3D, center_of_rotation, this);
    shp3d.addElement(xyz);
    view_repaint();
  }

  public synchronized void view_scale(float s){

    float dx = VMatrix3D.xo;
    float dy = VMatrix3D.yo;
    float dz = VMatrix3D.zo;
    VMatrix3D.translate(-dx,-dy,-dz);
    VMatrix3D.scale(s);
    VMatrix3D.translate(dx,dy,dz);
    view_repaint();
  }

  void this_mouseDragged(MouseEvent e) {
      int mod = e.getModifiers();

      if(((mod & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK) && ((mod & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK) && ((mod & InputEvent.SHIFT_MASK) == InputEvent.SHIFT_MASK)) {
          this.view_zrot(e.getY()-y);
      } else
          if (((mod & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK) && ((mod & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK)) {
              this.view_yrot(e.getX()-x);
              this.view_xrot(e.getY()-y);
          }else
              if(((mod & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK) && ((mod & InputEvent.SHIFT_MASK) == InputEvent.SHIFT_MASK)){
                  if(y-e.getY()>0) this.view_scale(0.9f);
                  if(y-e.getY()<0) this.view_scale(1.1f);
              }else
                  if(((mod & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK)) {
                      this.view_translate(e.getX()-x,y-e.getY(),0);
                  } else
                      if (((mod & InputEvent.BUTTON1_MASK) == InputEvent.BUTTON1_MASK) && DRAG == true)
                          view_repaint();

      x=e.getX();
      y=e.getY();
  }

  public void save(String file) {
    try {
      FileOutputStream ostream = new FileOutputStream(file);
      ObjectOutputStream p = new ObjectOutputStream(ostream);
      p.writeObject(VMatrix3D);
      for(int i=0; i<obj3d.size(); i++) p.writeObject(obj3d.elementAt(i));
      p.flush();
      ostream.close();
    }catch(FileNotFoundException fnfe) {
      System.err.println("File not found: " + file);
    }catch(IOException ioe){ System.err.println("Could not write file: " + file); ioe.printStackTrace();}
  }

  public void save(ObjectOutputStream oos) {
    try {
      oos.writeObject(VMatrix3D);
      for(int i=0; i<obj3d.size(); i++) oos.writeObject(obj3d.elementAt(i));
    }catch(Exception e) { e.printStackTrace();}
  }

  public void open(String file) {
    try {
      FileInputStream istream = new FileInputStream(file);
      ObjectInputStream p = new ObjectInputStream(istream);
      remove_all();
      VMatrix3D=(Matrix3D)p.readObject();
      Object obj;
      try { while((obj = p.readObject())!=null) add3D(obj); }catch(EOFException eof){}
      view_all();
      p.close();
      istream.close();
    }catch(Exception ioe){ System.err.println("Could not open file: " + file+"\n"+ioe); }
  }

  public void open(ObjectInputStream ois) {
    try {
      //remove_all();
      VMatrix3D=(Matrix3D)ois.readObject();
      Object obj;
      try { while((obj = ois.readObject())!=null) add3D(obj); }catch(EOFException eof){}
      view_all();
    }catch(Exception e) { e.printStackTrace();}
  }

  public void save_Image(String file) {
      byte[] pngbytes;
      PngEncoderB png;

    try {
      if(file.toLowerCase().indexOf(".png")==-1) file+=".png";
      FileOutputStream out = new FileOutputStream(file);
      BufferedImage image = (BufferedImage)createImage(getWidth(), getHeight());
      Graphics g = image.getGraphics();
      paint(g);

      png = new PngEncoderB(image,false,0,5); // Encode at level 5 compression
      pngbytes = png.pngEncode();
      out.write(pngbytes);

      g.dispose();
      out.flush();
      out.close();
    }catch(FileNotFoundException fnfe) {
      System.err.println("File not found: " + file);
    }catch(IOException ioe){ System.err.println("Could not write file: " + file); }
  }

  public void open_stl(String file){
    this.add3D(new _Stl(file));
    view_repaint();
  }

  public void error(Object st){
    JOptionPane.showMessageDialog(null,"Error: "+st,"Error!",JOptionPane.ERROR_MESSAGE);
    if(st instanceof Exception) ((Exception)st).printStackTrace(); else System.out.println("Error: "+st);
  }

  public void rebuild() {
      int count = obj3d.size();
      for (int i=0; i<4; i++)
          for(int j=0; j<count; j++){
              _Object obj = ((_Object)obj3d.elementAt(j));
              if (obj.getGeometryType() == i)
                  obj.reset(true);
          }
      view_reset();
      view_repaint();
      tree_reset();
  }

  public void setCenterOfRotation() {
      _Object obj = this.getSelectedObject3D();
      if (obj != null) {

         center_of_rotation = obj.getCenter();
         center_of_rotation.sub(new Vector3D(0.0f,0.0f,0.0f),center_of_rotation);

      }
      view_reset();
      view_repaint();
  }

  public void addBorderObjects() {
      _Object[] obj = this.getSelectedObjects3D();
      _Object[] add = null;
      if (obj != null)
          for (int i=0; i<obj.length; i++) {
              add = obj[i].getBorderObjects();
                  if (add != null)
                      for (int j=0; j<add.length; j++)
                          this.add3D(add[j]);
          }
      view_reset();
      view_repaint();
  }

  public void intersectObjects() throws IllegalStateException {
      _Object[] obj = this.getSelectedObjects3D();
      _NurbCurve[] o = new _NurbCurve[obj.length];
      _NurbSurface[] s = new _NurbSurface[obj.length];
      _Point[] p = null;
      _NurbCurve[] c = null;
      int j = 0, k = 0;

      if (obj != null)
          if (obj.length > 1)
          for (int i=0; i<obj.length; i++) {
              if (obj[i] instanceof _NurbCurve && !lib3D.contains(o,obj[i]))
                  o[j++] = (_NurbCurve)obj[i];
              if (obj[i] instanceof _NurbSurface && !lib3D.contains(s,obj[i]))
                  s[k++] = (_NurbSurface)obj[i];
          }

      if (j == 2) {
          try {
              p = lib3D.intersectCurves(o[0], o[1], GeometricTolerance);
          } catch (IllegalStateException e) {
              throw new IllegalStateException("No intersection found");
          }
      }
      else
          if (j == 1 && k == 1) {
              try {
                  p = lib3D.intersectCurveWithSurface(o[0], s[0], GeometricTolerance);
              } catch (IllegalStateException e) {
                  throw new IllegalStateException("No intersection found");
              }
          }
          else
              if (k == 2) {
                  try {
                      c = lib3D.intersectSurfaces(s[0], s[1]);
                  } catch (IllegalStateException e) {
                      throw new IllegalStateException("No intersection found");
                  }
              }

      if (p != null)
          if (p.length > 0)
              for (int i=0; i<p.length; i++)
                  this.add3D(p[i]);

      if (c != null)
          if (c.length > 0)
              for (int i=0; i<c.length; i++)
                  this.add3D(c[i]);

      view_reset();
      view_repaint();
  }


public void projectObjects() throws IllegalStateException {
      _Object[] obj = this.getSelectedObjects3D();
      _Point[] ps = new _Point[obj.length];
      _NurbCurve[] o = new _NurbCurve[obj.length];
      _NurbSurface[] s = new _NurbSurface[obj.length];
      _Point[] p = null;
      _NurbCurve[] c = null;
      int j = 0, k = 0, l = 0;

      if (obj != null)
          if (obj.length > 1)
          for (int i=0; i<obj.length; i++) {
              if (obj[i] instanceof _Point && !lib3D.contains(ps,obj[i]))
                  ps[l++] = (_Point)obj[i];
              if (obj[i] instanceof _NurbCurve && !lib3D.contains(o,obj[i]))
                  o[j++] = (_NurbCurve)obj[i];
              if (obj[i] instanceof _NurbSurface && !lib3D.contains(s,obj[i]))
                  s[k++] = (_NurbSurface)obj[i];
          }

      if (l == 1 && j == 1) {
          try {
              p = lib3D.projectPointOntoCurve(ps[0], o[0], GeometricTolerance);
          } catch (IllegalStateException e) {
              throw new IllegalStateException("No projection found");
          }
      }
      else
          if (l == 1 && k == 1) {
              try {
                  p = lib3D.projectPointOntoSurface(ps[0], s[0], GeometricTolerance);
              } catch (IllegalStateException e) {
                  throw new IllegalStateException("No projection found");
              }
          }
          else
          if (j == 1 && k == 1) {
              try {
                  // c = lib3D.projectCurveOntoSurface(o[0], s[0]);
              } catch (IllegalStateException e) {
                  throw new IllegalStateException("No projection found");
              }
          }

      if (p != null)
          if (p.length > 0)
              for (int i=0; i<p.length; i++)
                  this.add3D(p[i]);

      if (c != null)
          if (c.length > 0)
              for (int i=0; i<c.length; i++)
                  this.add3D(c[i]);

      view_reset();
      view_repaint();
  }


public void breakObjects() throws IllegalStateException {
      _Object[] obj = this.getSelectedObjects3D();
      _Point[] ps = new _Point[obj.length];
      _NurbCurve[] o = new _NurbCurve[obj.length];
      _NurbSurface[] s = new _NurbSurface[obj.length];
      _Point[] p = null;
      _NurbCurve[] c = null;
      int j = 0, k = 0, l = 0;

      if (obj != null)
          if (obj.length > 1)
          for (int i=0; i<obj.length; i++) {
              if (obj[i] instanceof _Point && !lib3D.contains(ps,obj[i]))
                  ps[l++] = (_Point)obj[i];
              if (obj[i] instanceof _NurbCurve && !lib3D.contains(o,obj[i]))
                  o[j++] = (_NurbCurve)obj[i];
              if (obj[i] instanceof _NurbSurface && !lib3D.contains(s,obj[i]))
                  s[k++] = (_NurbSurface)obj[i];
          }

      if (l == 1 && j == 1) {
          try {
              c = lib3D.breakCurve(o[0], ps[0], GeometricTolerance);
          } catch (IllegalStateException e) {
              throw new IllegalStateException("No break possible");
          }
      }
      else
          if (l == 1 && k == 1)
              throw new IllegalStateException("Surface break not supported yet");

          else
              if (j == 1 && k == 1)
                  throw new IllegalStateException("Surface break using a curve is not supported yet");


      if (p != null)
          if (p.length > 0)
              for (int i=0; i<p.length; i++)
                  this.add3D(p[i]);

      if (c != null)
          if (c.length > 0)
              for (int i=0; i<c.length; i++)
                  this.add3D(c[i]);

      view_reset();
      view_repaint();
  }

  private void requestAction() {

      if (pre != null)
          pre.requestAction();
  }


public boolean getSHOW_ID_NODE() {
    return SHOW_ID_NODE;
}

public void setSHOW_ID_NODE(boolean show_id_node) {
    SHOW_ID_NODE = show_id_node;
}

public Color getBGCOLOR() {
    return BGCOLOR;
}

public void setBGCOLOR(Color bgcolor) {
    BGCOLOR = bgcolor;
}

public boolean getDRAFTMODE() {
    return DRAFTMODE;
}

public void setDRAFTMODE(boolean draftmode) {
    DRAFTMODE = draftmode;
}

public byte getGRAPHICSMODE() {
    return GRAPHICSMODE;
}

public void setGRAPHICSMODE(byte graphicsmode) {
    GRAPHICSMODE = graphicsmode;
}

public Color getGRIDCOLOR() {
    return GRIDCOLOR;
}

public void setGRIDCOLOR(Color gridcolor) {
    GRIDCOLOR = gridcolor;
}

public float getGRIDLEVEL() {
    return GRIDLEVEL;
}

public void setGRIDLEVEL(float gridlevel) {
    GRIDLEVEL = gridlevel;
}

public boolean getGRIDMODE() {
    return GRIDMODE;
}

public void setGRIDMODE(boolean gridmode) {
    GRIDMODE = gridmode;
}

public byte getGRIDPLANE() {
    return GRIDPLANE;
}

public void setGRIDPLANE(byte gridplane) {
    GRIDPLANE = gridplane;
}

public float getGRIDSIZE() {
    return GRIDSIZE;
}

public void setGRIDSIZE(float gridsize) {
    GRIDSIZE = gridsize;
}

public float[] getLIMITS() {
    return LIMITS;
}

public void setLIMITS(float[] limits) {
    LIMITS = limits;
}

public float getNODE_MERGE_TOLERANCE() {
    return NODE_MERGE_TOLERANCE;
}

public void setNODE_MERGE_TOLERANCE(float node_merge_tolerance) {
    NODE_MERGE_TOLERANCE = node_merge_tolerance;
}

public int getNODESIZE() {
    return NODESIZE;
}

public void setNODESIZE(int nodesize) {
    NODESIZE = nodesize;
}

public int getPOINTSIZE() {
    return POINTSIZE;
}

public void setPOINTSIZE(int pointsize) {
    POINTSIZE = pointsize;
}

public byte getRENDERMODE() {
    return RENDERMODE;
}

public void setRENDERMODE(byte rendermode) {
    RENDERMODE = rendermode;
}

public boolean getSHOW_ID_CONSTRAINTS() {
    return SHOW_ID_CONSTRAINTS;
}

public void setSHOW_ID_CONSTRAINTS(boolean show_id_constraints) {
    SHOW_ID_CONSTRAINTS = show_id_constraints;
}

public boolean getSHOW_ID_ELEMENT() {
    return SHOW_ID_ELEMENT;
}

public void setSHOW_ID_ELEMENT(boolean show_id_element) {
    SHOW_ID_ELEMENT = show_id_element;
}

public boolean getSHOW_ID_LOADS() {
    return SHOW_ID_LOADS;
}

public void setSHOW_ID_LOADS(boolean show_id_loads) {
    SHOW_ID_LOADS = show_id_loads;
}

public boolean getSHOW_ID_MATERIALS() {
    return SHOW_ID_MATERIALS;
}

public void setSHOW_ID_MATERIALS(boolean show_id_materials) {
    SHOW_ID_MATERIALS = show_id_materials;
}

public boolean getSHOW_ID_TRACKERS() {
    return SHOW_ID_TRACKERS;
}

public void setSHOW_ID_TRACKERS(boolean show_id_trackers) {
    SHOW_ID_TRACKERS = show_id_trackers;
}

public Color getSTLCOLOR() {
    return STLCOLOR;
}

public void setSTLCOLOR(Color stlcolor) {
    STLCOLOR = stlcolor;
}

public Matrix3D getVMatrix3D() {
    return VMatrix3D;
}

public void setVMatrix3D(Matrix3D matrix3D) {
    VMatrix3D = matrix3D;
}

public DefaultTreeModel getTree3d() {
    return tree3d;
}

public float getGeometricTolerance() {
    return GeometricTolerance;
}

public void setGeometricTolerance(float geometricTolerance) {
    GeometricTolerance = geometricTolerance;
}


public void replaceAllInstancesOf(_Object o, _Object replacement) {

    // Replace all instances of object o with replacement
    for (int i=0; i<obj3d.size(); i++)
      ((_Object)obj3d.elementAt(i)).replaceObjectWith(o,replacement);

    // Remove object o from database
    obj3d.remove(o);

}


}