/*
 * 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.image.*;
import java.io.*;
import java.nio.IntBuffer;
import java.util.*;

import javax.media.opengl.*;
import javax.media.opengl.glu.GLU;
import javax.media.opengl.glu.GLUquadric;
import javax.swing.*;
import javax.swing.tree.*;

import com.sun.opengl.util.BufferUtil;

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

public class Canvas3DGL extends GLCanvas implements GLEventListener, Canvas3D, Serializable {
  private DefaultMutableTreeNode treeNode = new DefaultMutableTreeNode();
  public DefaultTreeModel tree3d = new DefaultTreeModel(treeNode);
  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 int x,y,x0,y0;
  private float screenwidth, screenheight, aspw, asph;
  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;

  // OpenGL specific stuff
  private static int NO_PICK = 0;
  private static int POINT = 1;
  private static int BOX = 2;
  
  private GLU glu = new GLU();
  private ArcBall arcBall = new ArcBall(640.0f, 480.0f); 
  private Matrix4f LastRot = new Matrix4f();
  private Matrix4f ThisRot = new Matrix4f();
  private final Object matrixLock = new Object();
  private float[] matrix = new float[16];
  private GLUquadric quadratic;
  private float scale = 1.0f;
  private float transX,transY,transZ;
  private float left,right,bottom,top,Znear, Zfar;
  private float aspect = 1.0f;
  private boolean genlist;
  private int picking = NO_PICK;
  private IntBuffer selectBuffer;
  private int hits = 0;
  private shp axis = new shpXYZ();
//  
  
  public static void main(String[] args) {
      JFrame frame = new JFrame("Canvas3DGL Demo");

      final GLCanvas canvas = new Canvas3DGL(null);

      frame.getContentPane().add(canvas);
      frame.setSize(300, 300);
      //kill the process when the JFrame is closed
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      
      frame.show();
      
          //show what we've done
          SwingUtilities.invokeLater (
            new Runnable() {
              public void run() {
                canvas.setVisible(true);
              }
            }
          );
        }
    
  
  
  public Canvas3DGL(PreProcessor pre) {
    this.pre = pre;
    this.setFocusable(false);
    
    addComponentListener(new ComponentAdapter() {
      public void componentResized(ComponentEvent e) {
      }
    });
    
    addGLEventListener(this);
    
    addMouseListener(new MouseAdapter() {

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

        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;
        
        view_repaint();
      }

        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()) {
                    remove_select();
                    clearTree();
                }
                
                setPickedObject();
                
                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);
        }
    });

   
    view_reset();
  }

  
  // OpenGL initialization method. 
  public void init(GLAutoDrawable drawable) {
      float[] ambient = {1f, 1f, 1f, 0f};
      float[] diffuse = {1f, 1f, 1f, 0f};
      
      GL gl = drawable.getGL();

      // Start Of User Initialization
      LastRot.setIdentity();                                // Reset Rotation
      ThisRot.setIdentity();                                // Reset Rotation
      ThisRot.get(matrix);

      gl.glClearColor(1.0f, 1.0f, 1.0f, 0.5f);                            
      gl.glClearDepth(1.0f);                                            
      gl.glDepthFunc(GL.GL_LEQUAL);                                        
      gl.glEnable(GL.GL_DEPTH_TEST);                                        
      gl.glShadeModel(GL.GL_FLAT);                                            

      gl.glEnable(GL.GL_LIGHTING);

      gl.glLightModeli(GL.GL_LIGHT_MODEL_TWO_SIDE, 1);
      gl.glLightfv(GL.GL_LIGHT0, GL.GL_AMBIENT, ambient, 0);
      gl.glLightfv(GL.GL_LIGHT0, GL.GL_DIFFUSE, diffuse, 0);
      gl.glEnable(GL.GL_LIGHT0);

      gl.glEnable(GL.GL_COLOR_MATERIAL);
      gl.glColorMaterial(GL.GL_FRONT_AND_BACK, GL.GL_AMBIENT_AND_DIFFUSE);
      
      quadratic = glu.gluNewQuadric();                                    
      glu.gluQuadricNormals(quadratic, GLU.GLU_SMOOTH);                   
      glu.gluQuadricTexture(quadratic, true);       
      
      view_all();
  }
  
  // OpenGL method called when the canvas is reshaped
  public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
      GL gl = drawable.getGL();
      float[] lightpos = {-1,1,1,0};
      screenwidth = width;
      screenheight = height;
      
      gl.glViewport(0, 0, width, height);                                   // Reset The Current Viewport
      gl.glMatrixMode(GL.GL_PROJECTION);                                        // Select The Projection Matrix
      gl.glLoadIdentity();                                                    // Reset The Projection Matrix
      
      gl.glLightfv(GL.GL_LIGHT0,GL.GL_POSITION,lightpos,0);             // Set light
      
      aspect = width / height;
      
      arcBall.setBounds((float) width, (float) height);                 //*NEW* Update mouse bounds for arcball

  }  

  // OpenGL method called when the display is updated. Do all drawing here.
  public void display(GLAutoDrawable drawable) {
      shp tmp;
      int[] viewport = new int[4];
      float box_scale_x,box_scale_y, box_x0, box_y0;
      
      // Set always rectangular aspect of the view
      if (aspect < 1.0f) {
          asph = aspect;
          aspw = 1.0f;
      }
      else {
          asph = 1.0f;
          aspw = aspect;
      }
      
      synchronized(matrixLock) {
          ThisRot.get(matrix);
      }

      GL gl = drawable.getGL();

      gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);

      gl.glMatrixMode(GL.GL_PROJECTION);                                        
      gl.glLoadIdentity();                                                    

      if (picking != NO_PICK) {
          selectBuffer = BufferUtil.newIntBuffer(4*shp3d.size());
          gl.glSelectBuffer(4*shp3d.size(), selectBuffer);                   
          gl.glRenderMode(GL.GL_SELECT);
          gl.glGetIntegerv(GL.GL_VIEWPORT, viewport, 0);
          gl.glInitNames();
          gl.glPushName(-1);
          if (picking == POINT)
              glu.gluPickMatrix((double) x, (double)(viewport[3]-y),5.0,5.0,viewport,0);
          else {
              glu.gluPickMatrix((x0+x)*0.5, (double)(viewport[3]-(y0+y)*0.5),Math.abs(x0-x),Math.abs(y0-y),viewport,0);
          }
      }
      
      gl.glOrtho(left*scale*aspw,right*scale*aspw,bottom*scale/asph,top*scale/asph,Znear,Zfar);
      
      gl.glMatrixMode(GL.GL_MODELVIEW);                                   
      gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);        
      gl.glLoadIdentity();                                                
      
      gl.glPushMatrix();                                                  

      // translate the model
      gl.glTranslated(transX,transY,transZ);
      
      // rotate the model
      gl.glMultMatrixf(matrix, 0);                                        
      
      // Draw each element
      // if (genlist == true) {
          
      //    gl.glNewList(1,GL.GL_COMPILE);
          
          for(int i=0; i<shp3d.size(); i++){
              tmp = (shp)shp3d.elementAt(i);
              if (tmp.isShow() == show) {
                  gl.glLoadName(i);     // Set current position in shp3d stack as name for picking
                  tmp.paintGL(gl,this,center_of_rotation.x,center_of_rotation.y,center_of_rotation.z,scale);
              }
          }
          
      //    gl.glEndList();
          genlist = false;
      // }

      // gl.glCallList(1);

          
      if (picking != NO_PICK) 
          hits = gl.glRenderMode(GL.GL_RENDER);                            // Set render mode & collect if picking
          
      gl.glPopMatrix();                                                    

      // If box select, draw the box
      if (DRAG == true) {

          gl.glLoadIdentity();                                                
          gl.glPushMatrix();                                                  

          box_scale_x = (right*scale*aspw-left*scale*aspw)/screenwidth;
          box_scale_y = -(top*scale/asph-bottom*scale/asph)/screenheight;
          box_x0 = left*scale*aspw;
          box_y0 = top*scale/asph;

          gl.glColor3f(1f, 0.1f, 0.1f);
          gl.glBegin(GL.GL_LINE_STRIP);
              gl.glVertex3f(box_x0+x0*box_scale_x,box_y0+y0*box_scale_y,Znear*0.99f);
              gl.glVertex3f(box_x0+x*box_scale_x,box_y0+y0*box_scale_y,Znear*0.99f);
              gl.glVertex3f(box_x0+x*box_scale_x,box_y0+y*box_scale_y,Znear*0.99f);
              gl.glVertex3f(box_x0+x0*box_scale_x,box_y0+y*box_scale_y,Znear*0.99f);
              gl.glVertex3f(box_x0+x0*box_scale_x,box_y0+y0*box_scale_y,Znear*0.99f);
          gl.glEnd();

          gl.glPopMatrix();

      }

      gl.glFlush();                                                        // Flush the GL Rendering Pipeline
      
  }

  // OpenGL method called when the display is changed.
  public void displayChanged(GLAutoDrawable drawable, boolean modeChanged, boolean deviceChanged) {
      
  }

  private synchronized void setPainted(){
    painted = true;
    notifyAll();
  }
  
  public synchronized void paint(Graphics g){

    display();
    
    setPainted();
  }
  
  public void update(Graphics g){
    paint(g);
  }
  
  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);
    treeNode.add(((_Object)obj).get_TreeNode());
    try{
      tree3d.reload();
    }catch(Exception e1){tree3d.reload();}
    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 count = obj3d.size();
      _Object o;
      
      // Generate selection
      picking = POINT;
      display();
      picking = NO_PICK;
      
      // Set related shapes to picked
      if (hits > 0) 
          for (int i=0; i<hits; i++)
              ((shp)shp3d.elementAt(selectBuffer.get(4*i+3))).setPicked(true);  
      
      // Generate selected object tree
      for (int i=0; i<count; i++) {
          o = ((_Object)obj3d.elementAt(i));
          if (o.isPickPoint(x,y,show,true))
              o.Select("");
      }
      
      // Update object selection in preprocessor tree 
      if (pre != null) pre.rescanTree();
      
  }
  
  
  private void boxSelect(int sx, int sy, int ex, int ey) {
      int count = obj3d.size();
      _Object o;
      
      // Generate selection
      picking = BOX;
      display();
      picking = NO_PICK;
      
      // Set related shapes to picked
      if (hits > 0) 
          for (int i=0; i<hits; i++)
              ((shp)shp3d.elementAt(selectBuffer.get(4*i+3))).setPicked(true);  
      
      // Generate selected object tree
      for (int i=0; i<count; i++) {
          o = ((_Object)obj3d.elementAt(i));
          if (o.isPickPoint(x,y,show,true))
              o.Select("");
      }
      
      // Update object selection in preprocessor tree 
      if (pre != null) pre.rescanTree();
  }
  
  
  public _Object getSelectedObject3D(){
      _Object[] obj = getSelectedObjects3D();
      
      if(obj.length > 0) return obj[0];

      return null;
  }
  
  public _Object[] getSelectedObjects3D() {
      int count = obj3d.size();
      Vector v = new Vector();
      _Object o;
      _Object[] p;
      Object[] q;
      
      for (int i=0; i<count; i++) {
          o = ((_Object)obj3d.elementAt(i));
          o.addSelectedObjects(v);
      }
      
      p = new _Object[v.size()];
      q = v.toArray();
      for (int i=0; i<q.length; i++)
          p[i] = (_Object)q[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();
      _Node[] o;
      
      for(int i=0; i<obj3d.size(); i++) {
          o = ((_Object)obj3d.elementAt(i)).get_Nodes();
          if (o != null) 
              for (int j=0; j<o.length; j++) arr.add(o[j]);
      }
      
      // Remove duplicate elements
      for (int i=0; i<arr.size(); i++)
    	  for (int j=i+1; j<arr.size(); j++)
    		  if (arr.elementAt(i).equals(arr.elementAt(j)))
    			  arr.removeElementAt(j--);
    			  
      // 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)).get_Elements();
          if (o != null) 
              for (int j=0; j<o.length; j++) arr.add(o[j]);
      }
      
      _Object[] out = new _Object[arr.size()];
      for (int i=0; i<out.length; i++)
          out[i] = (_Object)arr.elementAt(i);
      
      return out;
  }



public void remove_all(){
    id_obj3d=0;
    obj3d.removeAllElements();
    shp3d.removeAllElements();
    treeNode.removeAllChildren();
    tree3d.reload();
    view_grid();
    repaint();
    painted=true;
  }

  public void remove_select(){
    int count = obj3d.size();
    for(int i=0; i<count; i++) ((_Object)obj3d.elementAt(i)).Select(null);
  }

  public void remove(){
    treeNode.removeAllChildren();
    int count = obj3d.size();
    for(int i=0; i<count; i++) 
        if(((_Object)obj3d.elementAt(i)).delete()){
            obj3d.removeElementAt(i);
            i--;
            count--;
        } else treeNode.add(((_Object)obj3d.elementAt(i)).get_TreeNode());
    
    tree3d.reload();
    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(){
    treeNode.removeAllChildren();
    int count = obj3d.size();
    for(int i=0; i<count; i++) treeNode.add(((_Object)obj3d.elementAt(i)).get_TreeNode());
    tree3d.reload();
  }
  
  /** This method generates a new list of shapes to be used in the model rendering.
   * 
   */
  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]);
      }
    }
    
    // Generate a new command list in the display method
    genlist = true;
    
    // Add the grid to the shp3d array
    view_grid();
  }
  
  public synchronized void view_repaint(){
    if(painted){
      painted = false;
      repaint();
    }
  }
  
  public synchronized void view_translate(float dx, float dy, float dz){
    transX += dx*(right-left)*scale*aspw/screenwidth;
    transY += dy*(top-bottom)*scale*asph/screenheight;
    transZ += dz;
    
    view_repaint();
  }
  

  public synchronized void view_top(){
      synchronized(matrixLock) {
          LastRot.setIdentity();                                // Reset Rotation
          ThisRot.setIdentity();                                // Reset Rotation
      }
    view_repaint();
  }
  
  public synchronized void view_bottom(){
      synchronized(matrixLock) {
          LastRot.set(-1,0,0,0,0,1,0,0,0,0,-1,0,0,0,0,1);
          ThisRot.set(-1,0,0,0,0,1,0,0,0,0,-1,0,0,0,0,1);
      }    
    view_repaint();
  }
  
  public synchronized void view_ne(){
      synchronized(matrixLock) {
          LastRot.set(-0.67843485f,-0.47181374f,0.5631324f,0.0f,0.7337033f,-0.4742565f,0.48658055f,0.0f,0.03749419f,0.7432855f,0.6679232f,0.0f,0.0f,0.0f,0.0f,1.0f);
          ThisRot.set(-0.67843485f,-0.47181374f,0.5631324f,0.0f,0.7337033f,-0.4742565f,0.48658055f,0.0f,0.03749419f,0.7432855f,0.6679232f,0.0f,0.0f,0.0f,0.0f,1.0f);
      }    
    view_repaint();
  }
  
  public synchronized void view_sw(){
      synchronized(matrixLock) {
          LastRot.set(0.847451f,0.355411f,-0.394347f,0f,-0.5291711f,0.5060926f,-0.6810645f,0f,-0.04248167f,0.7858457f,0.6169619f,0f,0f,0f,0f,1f);
          ThisRot.set(0.847451f,0.355411f,-0.394347f,0f,-0.5291711f,0.5060926f,-0.6810645f,0f,-0.04248167f,0.7858457f,0.6169619f,0f,0f,0f,0f,1f);
      }    
    view_repaint();
  }
  
  public synchronized void view_se(){
      synchronized(matrixLock) {
          LastRot.set(0.7957134f,-0.36887878f,0.48038355f,0f,0.6056719f,0.48640004f,-0.6297437f,0f,-0.0013595134f,0.7920504f,0.6104544f,0f,0f,0f,0f,1f);
          ThisRot.set(0.7957134f,-0.36887878f,0.48038355f,0f,0.6056719f,0.48640004f,-0.6297437f,0f,-0.0013595134f,0.7920504f,0.6104544f,0f,0f,0f,0f,1f);
      }    
    view_repaint();
  }
  
  public synchronized void view_nw(){
      synchronized(matrixLock) {
          LastRot.set(-0.7357225f,0.48088235f,-0.4769326f,0.0f,-0.6764666f,-0.48717147f,0.55231994f,0f,0.03325309f,0.72898287f,0.683724f,0f,0f,0f,0f,1f);
          ThisRot.set(-0.7357225f,0.48088235f,-0.4769326f,0.0f,-0.6764666f,-0.48717147f,0.55231994f,0f,0.03325309f,0.72898287f,0.683724f,0f,0f,0f,0f,1f);
      }    
    view_repaint();
  }
  
  public synchronized void view_left(){
      synchronized(matrixLock) {
          LastRot.set(0,0,1,0,1,0,0,0,0,1,0,0,0,0,0,1);
          ThisRot.set(0,0,1,0,1,0,0,0,0,1,0,0,0,0,0,1);
      }    
    view_repaint();
  }
  
  public synchronized void view_right(){
      synchronized(matrixLock) {
          LastRot.set(0,0,-1,0,-1,0,0,0,0,1,0,0,0,0,0,1);
          ThisRot.set(0,0,-1,0,-1,0,0,0,0,1,0,0,0,0,0,1);
      }    
    view_repaint();
  }
  
  public synchronized void view_front(){
      synchronized(matrixLock) {
          LastRot.set(1,0,0,0,0,0,-1,0,0,1,0,0,0,0,0,1);
          ThisRot.set(1,0,0,0,0,0,-1,0,0,1,0,0,0,0,0,1);
      }    
    view_repaint();
  }
  
  public synchronized void view_back(){
      synchronized(matrixLock) {
          LastRot.set(-1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,1);
          ThisRot.set(-1,0,0,0,0,0,1,0,0,1,0,0,0,0,0,1);
      }    
    view_repaint();
  }
  
  public synchronized void view_all(){
      float cx,cy,cz,maxx,minx,maxy,miny,maxz,minz,d;
      float[] b;
      Shape shp;
      
      minx = java.lang.Float.MAX_VALUE;
      miny = java.lang.Float.MAX_VALUE;
      minz = java.lang.Float.MAX_VALUE;
      maxx = java.lang.Float.MIN_VALUE;
      maxy = java.lang.Float.MIN_VALUE;
      maxz = java.lang.Float.MIN_VALUE;
      
      for(int i=0; i<shp3d.size(); i++){
          try{
              b = ((shp)shp3d.elementAt(i)).getBoundaries();  
              
              if (b != null) { 
                  
                  maxx = Math.max(maxx,b[0]);
                  minx = Math.min(minx,b[1]);
                  maxy = Math.max(maxy,b[2]);
                  miny = Math.min(miny,b[3]);
                  maxz = Math.max(maxz,b[4]);
                  minz = Math.min(minz,b[5]);
              
              }
          }catch(Exception e){}
      }
      
      // Ball centre
      cx = (maxx+minx)/2;
      cy = (maxy+miny)/2;
      cz = (maxz+minz)/2;
      
      // Ball diameter
      d = maxx - minx;
      d = Math.max(d,maxy - miny);
      d = Math.max(d,maxz - minz);

      // Set viewing coordinates
      Znear = -d;
      Zfar = d;
      left = cx - d;
      right = cx + d;
      bottom = cy - d;
      top = cy + d;
      
      // Reset zoom
      scale = 1.0f;
      transX = 0.0f;
      transY = 0.0f;
      transZ = 0.0f;
     
      // Repaint      
      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;
      
      remove_select();
      if (pre != null) pre.clearTree();
      view_reset();
      view_repaint();
      
      return show;
  }
  
  // Creates a grid and a coordinate system and adds them to the shp base
  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);
                  shp3d.addElement(gp);
              }
          }
      
      shpXYZ xyz = new shpXYZ();
      shp3d.addElement(xyz);
      view_repaint();
      
  }
  
  public synchronized void view_scale(float s){
      scale *= s;
      view_repaint();
  }

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

      if (((mod & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK) && ((mod & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK))
      {
          synchronized(matrixLock) {
              LastRot.set( ThisRot );                                        // Set Last Static Rotation To Last Dynamic One
          }
          arcBall.click( e.getPoint() );                                 // Update Start Vector And Prepare For Dragging

      }
  }
  
  
  void this_mouseDragged(MouseEvent e) {
      int mod = e.getModifiers();
      
          if (((mod & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK) && ((mod & InputEvent.CTRL_MASK) == InputEvent.CTRL_MASK)) {
              Quat4f ThisQuat = new Quat4f();

              arcBall.drag( e.getPoint(), ThisQuat);        // Update End Vector And Get Rotation As Quaternion
              synchronized(matrixLock) {
                  ThisRot.setRotation(ThisQuat);            // Convert Quaternion Into Matrix3fT
                  ThisRot.mul( ThisRot, LastRot);           // Accumulate Last Rotation Into This One
              }
          } else 

              if(((mod & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK) && ((mod & InputEvent.SHIFT_MASK) == InputEvent.SHIFT_MASK)){
                  if(y-e.getY()>0) this.view_scale(1.1f);
                  if(y-e.getY()<0) this.view_scale(0.9f);
              } else

                  if(((mod & InputEvent.BUTTON3_MASK) == InputEvent.BUTTON3_MASK)) {
                      this.view_translate(e.getX()-x,y-e.getY(),0);
                  }
          
      x=e.getX();
      y=e.getY();

      view_repaint();
  }

  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_repaint();
      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_repaint();
    }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();
          
      }
      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 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();
  }



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();
  }

  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;
  }  

  
  
}