tim/prune/save/PovExporter.java

   1 package tim.prune.save;
   2
   3 import java.awt.BorderLayout;
   4 import java.awt.Component;
   5 import java.awt.FlowLayout;
   6 import java.awt.GridLayout;
   7 import java.awt.event.ActionEvent;
   8 import java.awt.event.ActionListener;
   9 import java.io.File;
  10 import java.io.FileWriter;
  11 import java.io.IOException;
  12 import java.util.ArrayList;
  13 import java.util.Iterator;
  14
  15 import javax.imageio.ImageIO;
  16 import javax.swing.BorderFactory;
  17 import javax.swing.Box;
  18 import javax.swing.BoxLayout;
  19 import javax.swing.ButtonGroup;
  20 import javax.swing.JButton;
  21 import javax.swing.JDialog;
  22 import javax.swing.JFileChooser;
  23 import javax.swing.JLabel;
  24 import javax.swing.JOptionPane;
  25 import javax.swing.JPanel;
  26 import javax.swing.JRadioButton;
  27 import javax.swing.JTextField;
  28 import javax.swing.SwingConstants;
  29
  30 import tim.prune.App;
  31 import tim.prune.FunctionLibrary;
  32 import tim.prune.I18nManager;
  33 import tim.prune.UpdateMessageBroker;
  34 import tim.prune.config.Config;
  35 import tim.prune.data.NumberUtils;
  36 import tim.prune.data.Track;
  37 import tim.prune.function.Export3dFunction;
  38 import tim.prune.function.srtm.LookupSrtmFunction;
  39 import tim.prune.gui.BaseImageDefinitionPanel;
  40 import tim.prune.gui.DialogCloser;
  41 import tim.prune.gui.TerrainDefinitionPanel;
  42 import tim.prune.gui.map.MapSource;
  43 import tim.prune.gui.map.MapSourceLibrary;
  44 import tim.prune.load.GenericFileFilter;
  45 import tim.prune.threedee.ImageDefinition;
  46 import tim.prune.threedee.TerrainCache;
  47 import tim.prune.threedee.TerrainDefinition;
  48 import tim.prune.threedee.TerrainHelper;
  49 import tim.prune.threedee.ThreeDModel;
  50
  51 /**
  52  * Class to export a 3d scene of the track to a specified Pov file
  53  */
  54 public class PovExporter extends Export3dFunction
  55 {
  56         private Track _track = null;
  57         private JDialog _dialog = null;
  58         private JFileChooser _fileChooser = null;
  59         private String _cameraX = null, _cameraY = null, _cameraZ = null;
  60         private JTextField _cameraXField = null, _cameraYField = null, _cameraZField = null;
  61         private JTextField _fontName = null, _altitudeFactorField = null;
  62         private JRadioButton _ballsAndSticksButton = null;
  63         /** Panel for defining the base image */
  64         private BaseImageDefinitionPanel _baseImagePanel = null;
  65         /** Component for defining the terrain */
  66         private TerrainDefinitionPanel _terrainPanel = null;
  67
  68         // defaults
  69         private static final double DEFAULT_CAMERA_DISTANCE = 30.0;
  70         private static final double MODEL_SCALE_FACTOR = 20.0;
  71         private static final String DEFAULT_FONT_FILE = "crystal.ttf";
  72
  73
  74         /**
  75          * Constructor
  76          * @param inApp App object
  77          */
  78         public PovExporter(App inApp)
  79         {
  80                 super(inApp);
  81                 _track = inApp.getTrackInfo().getTrack();
  82                 // Set default camera coordinates
  83                 _cameraX = "17"; _cameraY = "13"; _cameraZ = "-20";
  84         }
  85
  86         /** Get the name key */
  87         public String getNameKey() {
  88                 return "function.exportpov";
  89         }
  90
  91         /**
  92          * Set the coordinates for the camera (can be any scale)
  93          * @param inX X coordinate of camera
  94          * @param inY Y coordinate of camera
  95          * @param inZ Z coordinate of camera
  96          */
  97         public void setCameraCoordinates(double inX, double inY, double inZ)
  98         {
  99                 // calculate distance from origin
 100                 double cameraDist = Math.sqrt(inX*inX + inY*inY + inZ*inZ);
 101                 if (cameraDist > 0.0)
 102                 {
 103                         _cameraX = NumberUtils.formatNumberUk(inX / cameraDist * DEFAULT_CAMERA_DISTANCE, 5);
 104                         _cameraY = NumberUtils.formatNumberUk(inY / cameraDist * DEFAULT_CAMERA_DISTANCE, 5);
 105                         // Careful! Need to convert from java3d (right-handed) to povray (left-handed) coordinate system!
 106                         _cameraZ = NumberUtils.formatNumberUk(-inZ / cameraDist * DEFAULT_CAMERA_DISTANCE, 5);
 107                 }
 108         }
 109
 110
 111         /**
 112          * Show the dialog to select options and export file
 113          */
 114         public void begin()
 115         {
 116                 // Make dialog window to select inputs
 117                 if (_dialog == null)
 118                 {
 119                         _dialog = new JDialog(_parentFrame, I18nManager.getText(getNameKey()), true);
 120                         _dialog.setLocationRelativeTo(_parentFrame);
 121                         _dialog.getContentPane().add(makeDialogComponents());
 122                 }
 123                 // Get exaggeration factor from config
 124                 final int exaggFactor = Config.getConfigInt(Config.KEY_HEIGHT_EXAGGERATION);
 125                 if (exaggFactor > 0) {
 126                         _altFactor = exaggFactor / 100.0;
 127                 }
 128
 129                 // Set angles
 130                 _cameraXField.setText(_cameraX);
 131                 _cameraYField.setText(_cameraY);
 132                 _cameraZField.setText(_cameraZ);
 133                 _altitudeFactorField.setText("" + _altFactor);
 134                 // Pass terrain and image def parameters (if any) to the panels
 135                 if (_terrainDef != null) {
 136                         _terrainPanel.initTerrainParameters(_terrainDef);
 137                 }
 138                 if (_imageDef != null) {
 139                         _baseImagePanel.initImageParameters(_imageDef);
 140                 }
 141                 _baseImagePanel.updateBaseImageDetails();
 142                 // Show dialog
 143                 _dialog.pack();
 144                 _dialog.setVisible(true);
 145         }
 146
 147
 148         /**
 149          * Make the dialog components to select the export options
 150          * @return Component holding gui elements
 151          */
 152         private Component makeDialogComponents()
 153         {
 154                 JPanel panel = new JPanel();
 155                 panel.setLayout(new BorderLayout(4, 4));
 156                 JLabel introLabel = new JLabel(I18nManager.getText("dialog.exportpov.text"));
 157                 introLabel.setBorder(BorderFactory.createEmptyBorder(4, 4, 6, 4));
 158                 panel.add(introLabel, BorderLayout.NORTH);
 159                 // OK, Cancel buttons
 160                 JPanel buttonPanel = new JPanel();
 161                 buttonPanel.setLayout(new FlowLayout(FlowLayout.RIGHT));
 162                 JButton okButton = new JButton(I18nManager.getText("button.ok"));
 163                 okButton.addActionListener(new ActionListener() {
 164                         public void actionPerformed(ActionEvent e)
 165                         {
 166                                 // Need to launch export in new thread
 167                                 new Thread(new Runnable() {
 168                                         public void run()
 169                                         {
 170                                                 doExport();
 171                                                 _baseImagePanel.getGrouter().clearMapImage();
 172                                         }
 173                                 }).start();
 174                                 _dialog.dispose();
 175                         }
 176                 });
 177                 buttonPanel.add(okButton);
 178                 JButton cancelButton = new JButton(I18nManager.getText("button.cancel"));
 179                 cancelButton.addActionListener(new ActionListener() {
 180                         public void actionPerformed(ActionEvent e)
 181                         {
 182                                 _baseImagePanel.getGrouter().clearMapImage();
 183                                 _dialog.dispose();
 184                         }
 185                 });
 186                 buttonPanel.add(cancelButton);
 187                 panel.add(buttonPanel, BorderLayout.SOUTH);
 188
 189                 // central panel
 190                 JPanel centralPanel = new JPanel();
 191                 centralPanel.setLayout(new GridLayout(0, 2, 10, 4));
 192
 193                 JLabel fontLabel = new JLabel(I18nManager.getText("dialog.exportpov.font"));
 194                 fontLabel.setHorizontalAlignment(SwingConstants.TRAILING);
 195                 centralPanel.add(fontLabel);
 196                 String defaultFont = Config.getConfigString(Config.KEY_POVRAY_FONT);
 197                 if (defaultFont == null || defaultFont.equals("")) {
 198                         defaultFont = DEFAULT_FONT_FILE;
 199                 }
 200                 _fontName = new JTextField(defaultFont, 12);
 201                 _fontName.setAlignmentX(Component.LEFT_ALIGNMENT);
 202                 _fontName.addKeyListener(new DialogCloser(_dialog));
 203                 centralPanel.add(_fontName);
 204                 //coordinates of camera
 205                 JLabel cameraXLabel = new JLabel(I18nManager.getText("dialog.exportpov.camerax"));
 206                 cameraXLabel.setHorizontalAlignment(SwingConstants.TRAILING);
 207                 centralPanel.add(cameraXLabel);
 208                 _cameraXField = new JTextField("" + _cameraX);
 209                 centralPanel.add(_cameraXField);
 210                 JLabel cameraYLabel = new JLabel(I18nManager.getText("dialog.exportpov.cameray"));
 211                 cameraYLabel.setHorizontalAlignment(SwingConstants.TRAILING);
 212                 centralPanel.add(cameraYLabel);
 213                 _cameraYField = new JTextField("" + _cameraY);
 214                 centralPanel.add(_cameraYField);
 215                 JLabel cameraZLabel = new JLabel(I18nManager.getText("dialog.exportpov.cameraz"));
 216                 cameraZLabel.setHorizontalAlignment(SwingConstants.TRAILING);
 217                 centralPanel.add(cameraZLabel);
 218                 _cameraZField = new JTextField("" + _cameraZ);
 219                 centralPanel.add(_cameraZField);
 220                 // Altitude exaggeration
 221                 JLabel altitudeCapLabel = new JLabel(I18nManager.getText("dialog.3d.altitudefactor"));
 222                 altitudeCapLabel.setHorizontalAlignment(SwingConstants.TRAILING);
 223                 centralPanel.add(altitudeCapLabel);
 224                 _altitudeFactorField = new JTextField("1.0");
 225                 centralPanel.add(_altitudeFactorField);
 226
 227                 // Radio buttons for style - balls on sticks or tubes
 228                 JPanel stylePanel = new JPanel();
 229                 stylePanel.setLayout(new GridLayout(0, 2, 10, 4));
 230                 JLabel styleLabel = new JLabel(I18nManager.getText("dialog.exportpov.modelstyle"));
 231                 styleLabel.setHorizontalAlignment(SwingConstants.TRAILING);
 232                 stylePanel.add(styleLabel);
 233                 JPanel radioPanel = new JPanel();
 234                 radioPanel.setLayout(new BoxLayout(radioPanel, BoxLayout.Y_AXIS));
 235                 _ballsAndSticksButton = new JRadioButton(I18nManager.getText("dialog.exportpov.ballsandsticks"));
 236                 _ballsAndSticksButton.setSelected(false);
 237                 radioPanel.add(_ballsAndSticksButton);
 238                 JRadioButton tubesButton = new JRadioButton(I18nManager.getText("dialog.exportpov.tubesandwalls"));
 239                 tubesButton.setSelected(true);
 240                 radioPanel.add(tubesButton);
 241                 ButtonGroup group = new ButtonGroup();
 242                 group.add(_ballsAndSticksButton); group.add(tubesButton);
 243                 stylePanel.add(radioPanel);
 244
 245                 // Panel for the base image (parent is null because we don't need callback)
 246                 _baseImagePanel = new BaseImageDefinitionPanel(null, _dialog, _track);
 247                 // Panel for the terrain definition
 248                 _terrainPanel = new TerrainDefinitionPanel();
 249
 250                 // add these panels to the holder panel
 251                 JPanel holderPanel = new JPanel();
 252                 holderPanel.setLayout(new BorderLayout(5, 5));
 253                 JPanel boxPanel = new JPanel();
 254                 boxPanel.setLayout(new BoxLayout(boxPanel, BoxLayout.Y_AXIS));
 255                 boxPanel.add(centralPanel);
 256                 boxPanel.add(Box.createVerticalStrut(4));
 257                 boxPanel.add(stylePanel);
 258                 boxPanel.add(Box.createVerticalStrut(4));
 259                 boxPanel.add(_terrainPanel);
 260                 boxPanel.add(Box.createVerticalStrut(4));
 261                 boxPanel.add(_baseImagePanel);
 262                 holderPanel.add(boxPanel, BorderLayout.CENTER);
 263
 264                 panel.add(holderPanel, BorderLayout.CENTER);
 265                 return panel;
 266         }
 267
 268
 269         /**
 270          * Select the file and export data to it
 271          */
 272         private void doExport()
 273         {
 274                 // Copy camera coordinates
 275                 _cameraX = checkCoordinate(_cameraXField.getText());
 276                 _cameraY = checkCoordinate(_cameraYField.getText());
 277                 _cameraZ = checkCoordinate(_cameraZField.getText());
 278
 279                 // OK pressed, so choose output file
 280                 if (_fileChooser == null)
 281                 {
 282                         _fileChooser = new JFileChooser();
 283                         _fileChooser.setDialogType(JFileChooser.SAVE_DIALOG);
 284                         _fileChooser.setFileFilter(new GenericFileFilter("filetype.pov", new String[] {"pov"}));
 285                         _fileChooser.setAcceptAllFileFilterUsed(false);
 286                         // start from directory in config which should be set
 287                         final String configDir = Config.getConfigString(Config.KEY_TRACK_DIR);
 288                         if (configDir != null) {_fileChooser.setCurrentDirectory(new File(configDir));}
 289                 }
 290
 291                 // Allow choose again if an existing file is selected
 292                 boolean chooseAgain = false;
 293                 do
 294                 {
 295                         chooseAgain = false;
 296                         if (_fileChooser.showSaveDialog(_parentFrame) == JFileChooser.APPROVE_OPTION)
 297                         {
 298                                 // OK pressed and file chosen
 299                                 File povFile = _fileChooser.getSelectedFile();
 300                                 if (!povFile.getName().toLowerCase().endsWith(".pov"))
 301                                 {
 302                                         povFile = new File(povFile.getAbsolutePath() + ".pov");
 303                                 }
 304                                 final int nameLen = povFile.getName().length() - 4;
 305                                 final File imageFile = new File(povFile.getParentFile(), povFile.getName().substring(0, nameLen) + "_base.png");
 306                                 final File terrainFile = new File(povFile.getParentFile(), povFile.getName().substring(0, nameLen) + "_terrain.png");
 307                                 final boolean imageExists = _baseImagePanel.getImageDefinition().getUseImage() && imageFile.exists();
 308                                 final boolean terrainFileExists = _terrainPanel.getUseTerrain() && terrainFile.exists();
 309
 310                                 // Check if files exist and if necessary prompt for overwrite
 311                                 Object[] buttonTexts = {I18nManager.getText("button.overwrite"), I18nManager.getText("button.cancel")};
 312                                 if ((!povFile.exists() && !imageExists && !terrainFileExists)
 313                                         || JOptionPane.showOptionDialog(_parentFrame,
 314                                                 I18nManager.getText("dialog.save.overwrite.text"),
 315                                                 I18nManager.getText("dialog.save.overwrite.title"), JOptionPane.YES_NO_OPTION,
 316                                                 JOptionPane.WARNING_MESSAGE, null, buttonTexts, buttonTexts[1])
 317                                         == JOptionPane.YES_OPTION)
 318                                 {
 319                                         // Export the file(s)
 320                                         if (exportFiles(povFile, imageFile, terrainFile))
 321                                         {
 322                                                 // file saved - store directory in config for later
 323                                                 Config.setConfigString(Config.KEY_TRACK_DIR, povFile.getParentFile().getAbsolutePath());
 324                                                 // also store exaggeration
 325                                                 Config.setConfigInt(Config.KEY_HEIGHT_EXAGGERATION, (int) (_altFactor * 100));
 326                                         }
 327                                         else
 328                                         {
 329                                                 // export failed so need to choose again
 330                                                 chooseAgain = true;
 331                                         }
 332                                 }
 333                                 else
 334                                 {
 335                                         // overwrite cancelled so need to choose again
 336                                         chooseAgain = true;
 337                                 }
 338                         }
 339                 } while (chooseAgain);
 340         }
 341
 342
 343         /**
 344          * Export the data to the specified file(s)
 345          * @param inPovFile File object to save pov file to
 346          * @param inImageFile file object to save image to
 347          * @param inTerrainFile file object to save terrain to
 348          * @return true if successful
 349          */
 350         private boolean exportFiles(File inPovFile, File inImageFile, File inTerrainFile)
 351         {
 352                 FileWriter writer = null;
 353                 // find out the line separator for this system
 354                 final String lineSeparator = System.getProperty("line.separator");
 355                 try
 356                 {
 357                         // create and scale model
 358                         ThreeDModel model = new ThreeDModel(_track);
 359                         model.setModelSize(MODEL_SCALE_FACTOR);
 360                         try
 361                         {
 362                                 // try to use given altitude cap
 363                                 double givenFactor = Double.parseDouble(_altitudeFactorField.getText());
 364                                 if (givenFactor > 0.0) _altFactor = givenFactor;
 365                         }
 366                         catch (NumberFormatException nfe) { // parse failed, reset
 367                                 _altitudeFactorField.setText("" + _altFactor);
 368                         }
 369                         model.setAltitudeFactor(_altFactor);
 370
 371                         // Write base image if necessary
 372                         ImageDefinition imageDef = _baseImagePanel.getImageDefinition();
 373                         boolean useImage = imageDef.getUseImage();
 374                         if (useImage)
 375                         {
 376                                 // Get base image from grouter
 377                                 MapSource mapSource = MapSourceLibrary.getSource(imageDef.getSourceIndex());
 378                                 MapGrouter grouter = _baseImagePanel.getGrouter();
 379                                 GroutedImage baseImage = grouter.getMapImage(_track, mapSource, imageDef.getZoom());
 380                                 try
 381                                 {
 382                                         useImage = ImageIO.write(baseImage.getImage(), "png", inImageFile);
 383                                 }
 384                                 catch (IOException ioe) {
 385                                         System.err.println("Can't write image: " + ioe.getClass().getName());
 386                                         useImage = false;
 387                                 }
 388                                 if (!useImage) {
 389                                         _app.showErrorMessage(getNameKey(), "dialog.exportpov.cannotmakebaseimage");
 390                                 }
 391                         }
 392
 393                         boolean useTerrain = _terrainPanel.getUseTerrain();
 394                         if (useTerrain)
 395                         {
 396                                 TerrainHelper terrainHelper = new TerrainHelper(_terrainPanel.getGridSize());
 397                                 // See if there's a previously saved terrain track we can reuse
 398                                 TerrainDefinition terrainDef = new TerrainDefinition(_terrainPanel.getUseTerrain(), _terrainPanel.getGridSize());
 399                                 Track terrainTrack = TerrainCache.getTerrainTrack(_app.getCurrentDataStatus(), terrainDef);
 400                                 if (terrainTrack == null)
 401                                 {
 402                                         // Construct the terrain track according to these extents and the grid size
 403                                         terrainTrack = terrainHelper.createGridTrack(_track);
 404                                         // Get the altitudes from SRTM for all the points in the track
 405                                         LookupSrtmFunction srtmLookup = (LookupSrtmFunction) FunctionLibrary.FUNCTION_LOOKUP_SRTM;
 406                                         srtmLookup.begin(terrainTrack);
 407                                         while (srtmLookup.isRunning())
 408                                         {
 409                                                 try {
 410                                                         Thread.sleep(750);  // just polling in a wait loop isn't ideal but simple
 411                                                 }
 412                                                 catch (InterruptedException e) {}
 413                                         }
 414                                         // Fix the voids
 415                                         terrainHelper.fixVoids(terrainTrack);
 416
 417                                         // Store this back in the cache, maybe we'll need it again
 418                                         TerrainCache.storeTerrainTrack(terrainTrack, _app.getCurrentDataStatus(), terrainDef);
 419                                 }
 420
 421                                 model.setTerrain(terrainTrack);
 422                                 model.scale();
 423
 424                                 // Call TerrainHelper to write out the data from the model
 425                                 terrainHelper.writeHeightMap(model, inTerrainFile);
 426                         }
 427                         else
 428                         {
 429                                 // No terrain required, so just scale the model as it is
 430                                 model.scale();
 431                         }
 432
 433                         // Create file and write basics
 434                         writer = new FileWriter(inPovFile);
 435                         writeStartOfFile(writer, lineSeparator, useImage ? inImageFile : null, useTerrain ? inTerrainFile : null);
 436
 437                         // write out points
 438                         if (_ballsAndSticksButton.isSelected()) {
 439                                 writeDataPointsBallsAndSticks(writer, model, lineSeparator);
 440                         }
 441                         else {
 442                                 writeDataPointsTubesAndWalls(writer, model, lineSeparator);
 443                         }
 444
 445                         // everything worked
 446                         UpdateMessageBroker.informSubscribers(I18nManager.getText("confirm.save.ok1")
 447                                  + " " + _track.getNumPoints() + " " + I18nManager.getText("confirm.save.ok2")
 448                                  + " " + inPovFile.getAbsolutePath());
 449                         return true;
 450                 }
 451                 catch (IOException ioe)
 452                 {
 453                         JOptionPane.showMessageDialog(_parentFrame, I18nManager.getText("error.save.failed") + " : " + ioe.getMessage(),
 454                                 I18nManager.getText("error.save.dialogtitle"), JOptionPane.ERROR_MESSAGE);
 455                 }
 456                 finally
 457                 {
 458                         // close file ignoring exceptions
 459                         try
 460                         {
 461                                 writer.close();
 462                         }
 463                         catch (Exception e) {}
 464                 }
 465                 return false;
 466         }
 467
 468
 469         /**
 470          * Write the start of the Pov file, including base plane and lights
 471          * @param inWriter Writer to use for writing file
 472          * @param inLineSeparator line separator to use
 473          * @param inImageFile image file to reference (or null if none)
 474          * @param inTerrainFile terrain file to reference (or null if none)
 475          * @throws IOException on file writing error
 476          */
 477         private void writeStartOfFile(FileWriter inWriter, String inLineSeparator, File inImageFile, File inTerrainFile)
 478         throws IOException
 479         {
 480                 inWriter.write("// Pov file produced by GpsPrune - see http://gpsprune.activityworkshop.net/");
 481                 inWriter.write(inLineSeparator);
 482                 inWriter.write("#version 3.6;");
 483                 inWriter.write(inLineSeparator);
 484                 inWriter.write(inLineSeparator);
 485                 // Select font based on user input
 486                 String fontPath = _fontName.getText();
 487                 if (fontPath == null || fontPath.equals(""))
 488                 {
 489                         fontPath = DEFAULT_FONT_FILE;
 490                 }
 491                 else {
 492                         Config.setConfigString(Config.KEY_POVRAY_FONT, fontPath);
 493                 }
 494
 495                 // Make the definition of the base plane depending on whether there's an image or not
 496                 final boolean useImage = (inImageFile != null);
 497                 final boolean useImageOnBox = useImage && (inTerrainFile == null);
 498                 final String boxDefinition = (useImageOnBox ?
 499                         "   <0, 0, 0>, <1, 1, 0.001>" + inLineSeparator
 500                                 + "   pigment {image_map { png \"" + inImageFile.getName() + "\" map_type 0 interpolate 2 once } }" + inLineSeparator
 501                                 + "   scale 20.0 rotate <90, 0, 0>" + inLineSeparator
 502                                 + "   translate <-10.0, 0, -10.0>"
 503                         : "   <-10.0, -0.15, -10.0>," + inLineSeparator
 504                                 + "   <10.0, 0.0, 10.0>" + inLineSeparator
 505                                 + "   pigment { color rgb <0.5 0.75 0.8> }");
 506                 // TODO: Maybe could use the same geometry for the imageless case, would simplify code a bit
 507
 508                 // Definition of terrain shape if any
 509                 final String terrainDefinition = makeTerrainString(inTerrainFile, inImageFile, inLineSeparator);
 510
 511                 // Set up output
 512                 String[] outputLines = {
 513                   "global_settings { ambient_light rgb <4, 4, 4> }", "",
 514                   "// Background and camera",
 515                   "background { color rgb <0, 0, 0> }",
 516                   // camera position
 517                   "camera {",
 518                   "  location <" + _cameraX + ", " + _cameraY + ", " + _cameraZ + ">",
 519                   "  look_at  <0, 0, 0>",
 520                   "}", "",
 521                 // global declares
 522                   "// Global declares",
 523                   "#declare point_rod =",
 524                   "  cylinder {",
 525                   "   <0, 0, 0>,",
 526                   "   <0, 1, 0>,",
 527                   "   0.15",
 528                   "   open",
 529                   "   texture {",
 530                   "    pigment { color rgb <0.5 0.5 0.5> }",
 531                   useImage ? "   } no_shadow" : "   }",
 532                   "  }", "",
 533                   // MAYBE: Export rods to POV?  How to store in data?
 534                   "#declare waypoint_sphere =",
 535                   "  sphere {",
 536                   "   <0, 0, 0>, 0.4",
 537                   "    texture {",
 538                   "       pigment {color rgb <0.1 0.1 1.0>}",
 539                   "       finish { phong 1 }",
 540                   useImage ? "    } no_shadow" : "    }",
 541                   "  }",
 542                   "#declare track_sphere0 =",
 543                   "  sphere {",
 544                   "   <0, 0, 0>, 0.3", // size should depend on model size
 545                   "   texture {",
 546                   "      pigment {color rgb <0.1 0.6 0.1>}", // dark green
 547                   "      finish { phong 1 }",
 548                   "   }",
 549                   " }",
 550                   "#declare track_sphere1 =",
 551                   "  sphere {",
 552                   "   <0, 0, 0>, 0.3", // size should depend on model size
 553                   "   texture {",
 554                   "      pigment {color rgb <0.4 0.9 0.2>}", // green
 555                   "      finish { phong 1 }",
 556                   "   }",
 557                   " }",
 558                   "#declare track_sphere2 =",
 559                   "  sphere {",
 560                   "   <0, 0, 0>, 0.3", // size should depend on model size
 561                   "   texture {",
 562                   "      pigment {color rgb <0.7 0.8 0.2>}", // yellow
 563                   "      finish { phong 1 }",
 564                   "   }",
 565                   " }",
 566                   "#declare track_sphere3 =",
 567                   "  sphere {",
 568                   "   <0, 0, 0>, 0.3", // size should depend on model size
 569                   "   texture {",
 570                   "      pigment {color rgb <0.5 0.8 0.6>}", // greeny
 571                   "      finish { phong 1 }",
 572                   "   }",
 573                   " }",
 574                   "#declare track_sphere4 =",
 575                   "  sphere {",
 576                   "   <0, 0, 0>, 0.3", // size should depend on model size
 577                   "   texture {",
 578                   "      pigment {color rgb <0.2 0.9 0.9>}", // cyan
 579                   "      finish { phong 1 }",
 580                   "   }",
 581                   " }",
 582                   "#declare track_sphere5 =",
 583                   "  sphere {",
 584                   "   <0, 0, 0>, 0.3", // size should depend on model size
 585                   "   texture {",
 586                   "      pigment {color rgb <1.0 1.0 1.0>}", // white
 587                   "      finish { phong 1 }",
 588                   "   }",
 589                   " }",
 590                   "#declare track_sphere_t =",
 591                   "  sphere {",
 592                   "   <0, 0, 0>, 0.25", // size should depend on model size
 593                   "   texture {",
 594                   "      pigment {color rgb <0.6 1.0 0.2>}",
 595                   "      finish { phong 1 }",
 596                   "   } no_shadow",
 597                   " }",
 598                   "#declare wall_colour = rgbt <0.5, 0.5, 0.5, 0.3>;", "",
 599                   "// Base plane",
 600                   "box {",
 601                   boxDefinition,
 602                   "}", "",
 603                   // terrain
 604                   terrainDefinition,
 605                 // write cardinals
 606                   "// Cardinal letters N,S,E,W",
 607                   "text {",
 608                   "  ttf \"" + fontPath + "\" \"" + I18nManager.getText("cardinal.n") + "\" 0.3, 0",
 609                   "  pigment { color rgb <1 1 1> }",
 610                   "  translate <0, 0.2, 10.0>",
 611                   "}",
 612                   "text {",
 613                   "  ttf \"" + fontPath + "\" \"" + I18nManager.getText("cardinal.s") + "\" 0.3, 0",
 614                   "  pigment { color rgb <1 1 1> }",
 615                   "  translate <0, 0.2, -10.0>",
 616                   "}",
 617                   "text {",
 618                   "  ttf \"" + fontPath + "\" \"" + I18nManager.getText("cardinal.e") + "\" 0.3, 0",
 619                   "  pigment { color rgb <1 1 1> }",
 620                   "  translate <9.7, 0.2, 0>",
 621                   "}",
 622                   "text {",
 623                   "  ttf \"" + fontPath + "\" \"" + I18nManager.getText("cardinal.w") + "\" 0.3, 0",
 624                   "  pigment { color rgb <1 1 1> }",
 625                   "  translate <-10.3, 0.2, 0>",
 626                   "}", "",
 627                   // MAYBE: Light positions should relate to model size
 628                   "// lights",
 629                   "light_source { <-1, 9, -4> color rgb <0.5 0.5 0.5>}",
 630                   "light_source { <1, 6, -14> color rgb <0.6 0.6 0.6>}",
 631                   "light_source { <11, 12, 8> color rgb <0.3 0.3 0.3>}",
 632                   "",
 633                 };
 634                 // write strings to file
 635                 int numLines = outputLines.length;
 636                 for (int i=0; i<numLines; i++)
 637                 {
 638                         inWriter.write(outputLines[i]);
 639                         inWriter.write(inLineSeparator);
 640                 }
 641         }
 642
 643         /**
 644          * Make a description of the height_field object for the terrain, depending on terrain and image
 645          * @param inTerrainFile terrain file, or null if none
 646          * @param inImageFile image file, or null if none
 647          * @param inLineSeparator line separator
 648          * @return String for inserting into pov file
 649          */
 650         private static String makeTerrainString(File inTerrainFile, File inImageFile, String inLineSeparator)
 651         {
 652                 if (inTerrainFile == null) {return "";}
 653                 StringBuilder sb = new StringBuilder();
 654                 sb.append("//Terrain").append(inLineSeparator)
 655                         .append("height_field {").append(inLineSeparator)
 656                         .append("\tpng \"").append(inTerrainFile.getName()).append("\" smooth").append(inLineSeparator)
 657                         .append("\tfinish {diffuse 0.7 phong 0.2}").append(inLineSeparator);
 658                 if (inImageFile != null) {
 659                         sb.append("\tpigment {image_map { png \"").append(inImageFile.getName()).append("\"  } rotate x*90}").append(inLineSeparator);
 660                 }
 661                 else {
 662                         sb.append("\tpigment {color rgb <0.55 0.7 0.55> }").append(inLineSeparator);
 663                 }
 664                 sb.append("\tscale 20.0").append(inLineSeparator)
 665                         .append("\ttranslate <-10.0, 0, -10.0>").append(inLineSeparator).append("}");
 666                 return sb.toString();
 667         }
 668
 669         /**
 670          * Write out all the data points to the file in the balls-and-sticks style
 671          * @param inWriter Writer to use for writing file
 672          * @param inModel model object for getting data points
 673          * @param inLineSeparator line separator to use
 674          * @throws IOException on file writing error
 675          */
 676         private static void writeDataPointsBallsAndSticks(FileWriter inWriter, ThreeDModel inModel, String inLineSeparator)
 677         throws IOException
 678         {
 679                 inWriter.write("// Data points:");
 680                 inWriter.write(inLineSeparator);
 681                 int numPoints = inModel.getNumPoints();
 682                 for (int i=0; i<numPoints; i++)
 683                 {
 684                         // ball (different according to type)
 685                         if (inModel.getPointType(i) == ThreeDModel.POINT_TYPE_WAYPOINT)
 686                         {
 687                                 // waypoint ball
 688                                 inWriter.write("object { waypoint_sphere translate <" + inModel.getScaledHorizValue(i)
 689                                         + "," + inModel.getScaledAltValue(i) + "," + inModel.getScaledVertValue(i) + "> }");
 690                         }
 691                         else
 692                         {
 693                                 // normal track point ball
 694                                 inWriter.write("object { track_sphere" + checkHeightCode(inModel.getPointHeightCode(i))
 695                                         + " translate <" + inModel.getScaledHorizValue(i) + "," + inModel.getScaledAltValue(i)
 696                                         + "," + inModel.getScaledVertValue(i) + "> }");
 697                         }
 698                         inWriter.write(inLineSeparator);
 699                         // vertical rod (if altitude positive)
 700                         if (inModel.getScaledAltValue(i) > 0.0)
 701                         {
 702                                 inWriter.write("object { point_rod translate <" + inModel.getScaledHorizValue(i) + ",0,"
 703                                         + inModel.getScaledVertValue(i) + "> scale <1," + inModel.getScaledAltValue(i) + ",1> }");
 704                                 inWriter.write(inLineSeparator);
 705                         }
 706                 }
 707                 inWriter.write(inLineSeparator);
 708         }
 709
 710
 711         /**
 712          * Write out all the data points to the file in the tubes-and-walls style
 713          * @param inWriter Writer to use for writing file
 714          * @param inModel model object for getting data points
 715          * @param inLineSeparator line separator to use
 716          * @throws IOException on file writing error
 717          */
 718         private static void writeDataPointsTubesAndWalls(FileWriter inWriter, ThreeDModel inModel, String inLineSeparator)
 719         throws IOException
 720         {
 721                 inWriter.write("// Data points:");
 722                 inWriter.write(inLineSeparator);
 723                 int numPoints = inModel.getNumPoints();
 724                 // Loop over all points and write out waypoints as balls
 725                 for (int i=0; i<numPoints; i++)
 726                 {
 727                         if (inModel.getPointType(i) == ThreeDModel.POINT_TYPE_WAYPOINT)
 728                         {
 729                                 // waypoint ball
 730                                 inWriter.write("object { waypoint_sphere translate <" + inModel.getScaledHorizValue(i)
 731                                         + "," + inModel.getScaledAltValue(i) + "," + inModel.getScaledVertValue(i) + "> }");
 732                                 // vertical rod (if altitude positive)
 733                                 if (inModel.getScaledAltValue(i) > 0.0)
 734                                 {
 735                                         inWriter.write(inLineSeparator);
 736                                         inWriter.write("object { point_rod translate <" + inModel.getScaledHorizValue(i) + ",0,"
 737                                                 + inModel.getScaledVertValue(i) + "> scale <1," + inModel.getScaledAltValue(i) + ",1> }");
 738                                 }
 739                                 inWriter.write(inLineSeparator);
 740                         }
 741                 }
 742                 inWriter.write(inLineSeparator);
 743
 744                 // Loop over all the track segments
 745                 ArrayList<ModelSegment> segmentList = getSegmentList(inModel);
 746                 Iterator<ModelSegment> segmentIterator = segmentList.iterator();
 747                 while (segmentIterator.hasNext())
 748                 {
 749                         ModelSegment segment = segmentIterator.next();
 750                         int segLength = segment.getNumTrackPoints();
 751
 752                         // if the track segment is long enough, do a cubic spline sphere sweep
 753                         if (segLength <= 1)
 754                         {
 755                                 // single point in segment - just draw sphere
 756                                 int index = segment.getStartIndex();
 757                                 inWriter.write("object { track_sphere_t"
 758                                         + " translate <" + inModel.getScaledHorizValue(index) + "," + inModel.getScaledAltValue(index)
 759                                         + "," + inModel.getScaledVertValue(index) + "> }");
 760                                 // maybe draw some kind of polygon too or rod?
 761                         }
 762                         else
 763                         {
 764                                 writeSphereSweep(inWriter, inModel, segment, inLineSeparator);
 765                         }
 766
 767                         // Write wall underneath segment
 768                         if (segLength > 1)
 769                         {
 770                                 writePolygonWall(inWriter, inModel, segment, inLineSeparator);
 771                         }
 772                 }
 773         }
 774
 775
 776         /**
 777          * Write out a single sphere sweep using either cubic spline or linear spline
 778          * @param inWriter Writer to use for writing file
 779          * @param inModel model object for getting data points
 780          * @param inSegment model segment to draw
 781          * @param inLineSeparator line separator to use
 782          * @throws IOException on file writing error
 783          */
 784         private static void writeSphereSweep(FileWriter inWriter, ThreeDModel inModel, ModelSegment inSegment, String inLineSeparator)
 785         throws IOException
 786         {
 787                 // 3d sphere sweep
 788                 inWriter.write("// Sphere sweep:");
 789                 inWriter.write(inLineSeparator);
 790                 String splineType = inSegment.getNumTrackPoints() < 5?"linear_spline":"cubic_spline";
 791                 inWriter.write("sphere_sweep { "); inWriter.write(splineType);
 792                 inWriter.write(" " + inSegment.getNumTrackPoints() + ",");
 793                 inWriter.write(inLineSeparator);
 794                 // Loop over all points in this segment and write out sphere sweep
 795                 for (int i=inSegment.getStartIndex(); i<=inSegment.getEndIndex(); i++)
 796                 {
 797                         if (inModel.getPointType(i) != ThreeDModel.POINT_TYPE_WAYPOINT)
 798                         {
 799                                 inWriter.write("  <" + inModel.getScaledHorizValue(i) + "," + inModel.getScaledAltValue(i)
 800                                         + "," + inModel.getScaledVertValue(i) + ">, 0.25");
 801                                 inWriter.write(inLineSeparator);
 802                         }
 803                 }
 804                 inWriter.write("  tolerance 0.1");
 805                 inWriter.write(inLineSeparator);
 806                 inWriter.write("  texture { pigment {color rgb <0.6 1.0 0.2>}  finish {phong 1} }");
 807                 inWriter.write(inLineSeparator);
 808                 inWriter.write("  no_shadow");
 809                 inWriter.write(inLineSeparator);
 810                 inWriter.write("}");
 811                 inWriter.write(inLineSeparator);
 812         }
 813
 814
 815         /**
 816          * Write out a single polygon-based wall for the tubes-and-walls style
 817          * @param inWriter Writer to use for writing file
 818          * @param inModel model object for getting data points
 819          * @param inSegment model segment to draw
 820          * @param inLineSeparator line separator to use
 821          * @throws IOException on file writing error
 822          */
 823         private static void writePolygonWall(FileWriter inWriter, ThreeDModel inModel, ModelSegment inSegment, String inLineSeparator)
 824         throws IOException
 825         {
 826                 // wall
 827                 inWriter.write(inLineSeparator);
 828                 inWriter.write("// wall between sweep and floor:");
 829                 inWriter.write(inLineSeparator);
 830                 // Loop over all points in this segment again and write out polygons
 831                 int prevIndex = -1;
 832                 for (int i=inSegment.getStartIndex(); i<=inSegment.getEndIndex(); i++)
 833                 {
 834                         if (inModel.getPointType(i) != ThreeDModel.POINT_TYPE_WAYPOINT)
 835                         {
 836                                 if (prevIndex >= 0)
 837                                 {
 838                                         double xDiff = inModel.getScaledHorizValue(i) - inModel.getScaledHorizValue(prevIndex);
 839                                         double yDiff = inModel.getScaledVertValue(i) - inModel.getScaledVertValue(prevIndex);
 840                                         double dist = Math.sqrt(xDiff * xDiff + yDiff * yDiff);
 841                                         if (dist > 0)
 842                                         {
 843                                                 inWriter.write("polygon {");
 844                                                 inWriter.write("  5, <" + inModel.getScaledHorizValue(prevIndex) + ", 0.0, " + inModel.getScaledVertValue(prevIndex) + ">,");
 845                                                 inWriter.write(" <" + inModel.getScaledHorizValue(prevIndex) + ", " + inModel.getScaledAltValue(prevIndex) + ", "
 846                                                         + inModel.getScaledVertValue(prevIndex) + ">,");
 847                                                 inWriter.write(" <" + inModel.getScaledHorizValue(i) + ", " + inModel.getScaledAltValue(i) + ", "
 848                                                         + inModel.getScaledVertValue(i) + ">,");
 849                                                 inWriter.write(" <" + inModel.getScaledHorizValue(i) + ", 0.0, " + inModel.getScaledVertValue(i) + ">,");
 850                                                 inWriter.write(" <" + inModel.getScaledHorizValue(prevIndex) + ", 0.0, " + inModel.getScaledVertValue(prevIndex) + ">");
 851                                                 inWriter.write("  pigment { color wall_colour } no_shadow");
 852                                                 inWriter.write("}");
 853                                                 inWriter.write(inLineSeparator);
 854                                         }
 855                                 }
 856                                 prevIndex = i;
 857                         }
 858                 }
 859         }
 860
 861
 862         /**
 863          * @param inCode height code to check
 864          * @return validated height code within range 0 to max
 865          */
 866         private static byte checkHeightCode(byte inCode)
 867         {
 868                 final byte maxHeightCode = 5;
 869                 if (inCode < 0) return 0;
 870                 if (inCode > maxHeightCode) return maxHeightCode;
 871                 return inCode;
 872         }
 873
 874
 875         /**
 876          * Check the given coordinate
 877          * @param inString String entered by user
 878          * @return validated String value
 879          */
 880         private static String checkCoordinate(String inString)
 881         {
 882                 double value = 0.0;
 883                 try
 884                 {
 885                         value = Double.parseDouble(inString);
 886                 }
 887                 catch (Exception e) {} // ignore parse failures
 888                 return "" + value;
 889         }
 890
 891         /**
 892          * Go through the points making a list of the segment starts and the number of track points in each segment
 893          * @param inModel model containing data
 894          * @return list of ModelSegment objects
 895          */
 896         private static ArrayList<ModelSegment> getSegmentList(ThreeDModel inModel)
 897         {
 898                 ArrayList<ModelSegment> segmentList = new ArrayList<ModelSegment>();
 899                 if (inModel != null && inModel.getNumPoints() > 0)
 900                 {
 901                         ModelSegment currSegment = null;
 902                         int numTrackPoints = 0;
 903                         for (int i=0; i<inModel.getNumPoints(); i++)
 904                         {
 905                                 if (inModel.getPointType(i) != ThreeDModel.POINT_TYPE_WAYPOINT)
 906                                 {
 907                                         if (inModel.getPointType(i) == ThreeDModel.POINT_TYPE_SEGMENT_START || currSegment == null)
 908                                         {
 909                                                 // start of segment
 910                                                 if (currSegment != null)
 911                                                 {
 912                                                         currSegment.setEndIndex(i-1);
 913                                                         currSegment.setNumTrackPoints(numTrackPoints);
 914                                                         segmentList.add(currSegment);
 915                                                         numTrackPoints = 0;
 916                                                 }
 917                                                 currSegment = new ModelSegment(i);
 918                                         }
 919                                         numTrackPoints++;
 920                                 }
 921                         }
 922                         // Add last segment to list
 923                         if (currSegment != null && numTrackPoints > 0)
 924                         {
 925                                 currSegment.setEndIndex(inModel.getNumPoints()-1);
 926                                 currSegment.setNumTrackPoints(numTrackPoints);
 927                                 segmentList.add(currSegment);
 928                         }
 929                 }
 930                 return segmentList;
 931         }
 932 }