]> gitweb.fperrin.net Git - GpsPrune.git/blobdiff - tim/prune/save/PovExporter.java
Version 19, May 2018
[GpsPrune.git] / tim / prune / save / PovExporter.java
index ee30841d6d779f7790b95006a58a75eda7759433..e0fc9d35be049168096f68d97c1b7286901ae462 100644 (file)
@@ -12,7 +12,9 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Iterator;
 
+import javax.imageio.ImageIO;
 import javax.swing.BorderFactory;
+import javax.swing.Box;
 import javax.swing.BoxLayout;
 import javax.swing.ButtonGroup;
 import javax.swing.JButton;
@@ -26,15 +28,24 @@ import javax.swing.JTextField;
 import javax.swing.SwingConstants;
 
 import tim.prune.App;
+import tim.prune.FunctionLibrary;
 import tim.prune.I18nManager;
 import tim.prune.UpdateMessageBroker;
 import tim.prune.config.Config;
 import tim.prune.data.NumberUtils;
 import tim.prune.data.Track;
 import tim.prune.function.Export3dFunction;
+import tim.prune.function.srtm.LookupSrtmFunction;
+import tim.prune.gui.BaseImageDefinitionPanel;
 import tim.prune.gui.DialogCloser;
+import tim.prune.gui.TerrainDefinitionPanel;
+import tim.prune.gui.map.MapSource;
+import tim.prune.gui.map.MapSourceLibrary;
 import tim.prune.load.GenericFileFilter;
-import tim.prune.threedee.LineDialog;
+import tim.prune.threedee.ImageDefinition;
+import tim.prune.threedee.TerrainCache;
+import tim.prune.threedee.TerrainDefinition;
+import tim.prune.threedee.TerrainHelper;
 import tim.prune.threedee.ThreeDModel;
 
 /**
@@ -49,9 +60,14 @@ public class PovExporter extends Export3dFunction
        private JTextField _cameraXField = null, _cameraYField = null, _cameraZField = null;
        private JTextField _fontName = null, _altitudeFactorField = null;
        private JRadioButton _ballsAndSticksButton = null;
+       /** Panel for defining the base image */
+       private BaseImageDefinitionPanel _baseImagePanel = null;
+       /** Component for defining the terrain */
+       private TerrainDefinitionPanel _terrainPanel = null;
 
        // defaults
        private static final double DEFAULT_CAMERA_DISTANCE = 30.0;
+       private static final double MODEL_SCALE_FACTOR = 20.0;
        private static final String DEFAULT_FONT_FILE = "crystal.ttf";
 
 
@@ -84,10 +100,10 @@ public class PovExporter extends Export3dFunction
                double cameraDist = Math.sqrt(inX*inX + inY*inY + inZ*inZ);
                if (cameraDist > 0.0)
                {
-                       _cameraX = NumberUtils.formatNumber(inX / cameraDist * DEFAULT_CAMERA_DISTANCE, 5);
-                       _cameraY = NumberUtils.formatNumber(inY / cameraDist * DEFAULT_CAMERA_DISTANCE, 5);
+                       _cameraX = NumberUtils.formatNumberUk(inX / cameraDist * DEFAULT_CAMERA_DISTANCE, 5);
+                       _cameraY = NumberUtils.formatNumberUk(inY / cameraDist * DEFAULT_CAMERA_DISTANCE, 5);
                        // Careful! Need to convert from java3d (right-handed) to povray (left-handed) coordinate system!
-                       _cameraZ = NumberUtils.formatNumber(-inZ / cameraDist * DEFAULT_CAMERA_DISTANCE, 5);
+                       _cameraZ = NumberUtils.formatNumberUk(-inZ / cameraDist * DEFAULT_CAMERA_DISTANCE, 5);
                }
        }
 
@@ -97,19 +113,32 @@ public class PovExporter extends Export3dFunction
         */
        public void begin()
        {
-               // Make dialog window to select angles, colours etc
+               // Make dialog window to select inputs
                if (_dialog == null)
                {
                        _dialog = new JDialog(_parentFrame, I18nManager.getText(getNameKey()), true);
                        _dialog.setLocationRelativeTo(_parentFrame);
                        _dialog.getContentPane().add(makeDialogComponents());
                }
+               // Get exaggeration factor from config
+               final int exaggFactor = Config.getConfigInt(Config.KEY_HEIGHT_EXAGGERATION);
+               if (exaggFactor > 0) {
+                       _altFactor = exaggFactor / 100.0;
+               }
 
                // Set angles
                _cameraXField.setText(_cameraX);
                _cameraYField.setText(_cameraY);
                _cameraZField.setText(_cameraZ);
                _altitudeFactorField.setText("" + _altFactor);
+               // Pass terrain and image def parameters (if any) to the panels
+               if (_terrainDef != null) {
+                       _terrainPanel.initTerrainParameters(_terrainDef);
+               }
+               if (_imageDef != null) {
+                       _baseImagePanel.initImageParameters(_imageDef);
+               }
+               _baseImagePanel.updateBaseImageDetails();
                // Show dialog
                _dialog.pack();
                _dialog.setVisible(true);
@@ -123,7 +152,7 @@ public class PovExporter extends Export3dFunction
        private Component makeDialogComponents()
        {
                JPanel panel = new JPanel();
-               panel.setLayout(new BorderLayout());
+               panel.setLayout(new BorderLayout(4, 4));
                JLabel introLabel = new JLabel(I18nManager.getText("dialog.exportpov.text"));
                introLabel.setBorder(BorderFactory.createEmptyBorder(4, 4, 6, 4));
                panel.add(introLabel, BorderLayout.NORTH);
@@ -134,7 +163,14 @@ public class PovExporter extends Export3dFunction
                okButton.addActionListener(new ActionListener() {
                        public void actionPerformed(ActionEvent e)
                        {
-                               doExport();
+                               // Need to launch export in new thread
+                               new Thread(new Runnable() {
+                                       public void run()
+                                       {
+                                               doExport();
+                                               _baseImagePanel.getGrouter().clearMapImage();
+                                       }
+                               }).start();
                                _dialog.dispose();
                        }
                });
@@ -143,6 +179,7 @@ public class PovExporter extends Export3dFunction
                cancelButton.addActionListener(new ActionListener() {
                        public void actionPerformed(ActionEvent e)
                        {
+                               _baseImagePanel.getGrouter().clearMapImage();
                                _dialog.dispose();
                        }
                });
@@ -205,33 +242,25 @@ public class PovExporter extends Export3dFunction
                group.add(_ballsAndSticksButton); group.add(tubesButton);
                stylePanel.add(radioPanel);
 
-               // add this grid to the holder panel
+               // Panel for the base image (parent is null because we don't need callback)
+               _baseImagePanel = new BaseImageDefinitionPanel(null, _dialog, _track);
+               // Panel for the terrain definition
+               _terrainPanel = new TerrainDefinitionPanel();
+
+               // add these panels to the holder panel
                JPanel holderPanel = new JPanel();
                holderPanel.setLayout(new BorderLayout(5, 5));
                JPanel boxPanel = new JPanel();
                boxPanel.setLayout(new BoxLayout(boxPanel, BoxLayout.Y_AXIS));
                boxPanel.add(centralPanel);
+               boxPanel.add(Box.createVerticalStrut(4));
                boxPanel.add(stylePanel);
+               boxPanel.add(Box.createVerticalStrut(4));
+               boxPanel.add(_terrainPanel);
+               boxPanel.add(Box.createVerticalStrut(4));
+               boxPanel.add(_baseImagePanel);
                holderPanel.add(boxPanel, BorderLayout.CENTER);
 
-               // show lines button
-               JButton showLinesButton = new JButton(I18nManager.getText("button.showlines"));
-               showLinesButton.addActionListener(new ActionListener() {
-                       public void actionPerformed(ActionEvent e)
-                       {
-                               // Need to scale model to find lines
-                               ThreeDModel model = new ThreeDModel(_track);
-                               model.scale();
-                               double[] latLines = model.getLatitudeLines();
-                               double[] lonLines = model.getLongitudeLines();
-                               LineDialog dialog = new LineDialog(_parentFrame, latLines, lonLines);
-                               dialog.showDialog();
-                       }
-               });
-               JPanel flowPanel = new JPanel();
-               flowPanel.setLayout(new FlowLayout());
-               flowPanel.add(showLinesButton);
-               holderPanel.add(flowPanel, BorderLayout.EAST);
                panel.add(holderPanel, BorderLayout.CENTER);
                return panel;
        }
@@ -267,25 +296,36 @@ public class PovExporter extends Export3dFunction
                        if (_fileChooser.showSaveDialog(_parentFrame) == JFileChooser.APPROVE_OPTION)
                        {
                                // OK pressed and file chosen
-                               File file = _fileChooser.getSelectedFile();
-                               if (!file.getName().toLowerCase().endsWith(".pov"))
+                               File povFile = _fileChooser.getSelectedFile();
+                               if (!povFile.getName().toLowerCase().endsWith(".pov"))
                                {
-                                       file = new File(file.getAbsolutePath() + ".pov");
+                                       povFile = new File(povFile.getAbsolutePath() + ".pov");
                                }
-                               // Check if file exists and if necessary prompt for overwrite
+                               final int nameLen = povFile.getName().length() - 4;
+                               final File imageFile = new File(povFile.getParentFile(), povFile.getName().substring(0, nameLen) + "_base.png");
+                               final File terrainFile = new File(povFile.getParentFile(), povFile.getName().substring(0, nameLen) + "_terrain.png");
+                               final boolean imageExists = _baseImagePanel.getImageDefinition().getUseImage() && imageFile.exists();
+                               final boolean terrainFileExists = _terrainPanel.getUseTerrain() && terrainFile.exists();
+
+                               // Check if files exist and if necessary prompt for overwrite
                                Object[] buttonTexts = {I18nManager.getText("button.overwrite"), I18nManager.getText("button.cancel")};
-                               if (!file.exists() || JOptionPane.showOptionDialog(_parentFrame,
+                               if ((!povFile.exists() && !imageExists && !terrainFileExists)
+                                       || JOptionPane.showOptionDialog(_parentFrame,
                                                I18nManager.getText("dialog.save.overwrite.text"),
                                                I18nManager.getText("dialog.save.overwrite.title"), JOptionPane.YES_NO_OPTION,
                                                JOptionPane.WARNING_MESSAGE, null, buttonTexts, buttonTexts[1])
                                        == JOptionPane.YES_OPTION)
                                {
-                                       // Export the file
-                                       if (exportFile(file))
+                                       // Export the file(s)
+                                       if (exportFiles(povFile, imageFile, terrainFile))
                                        {
-                                               // file saved
-                                               // Store directory in config for later
-                                               Config.setConfigString(Config.KEY_TRACK_DIR, file.getParentFile().getAbsolutePath());
+                                               // file saved - store directory in config for later
+                                               Config.setConfigString(Config.KEY_TRACK_DIR, povFile.getParentFile().getAbsolutePath());
+                                               // also store exaggeration and grid size
+                                               Config.setConfigInt(Config.KEY_HEIGHT_EXAGGERATION, (int) (_altFactor * 100));
+                                               if (_terrainPanel.getUseTerrain() && _terrainPanel.getGridSize() > 20) {
+                                                       Config.setConfigInt(Config.KEY_TERRAIN_GRID_SIZE, _terrainPanel.getGridSize());
+                                               }
                                        }
                                        else
                                        {
@@ -304,11 +344,13 @@ public class PovExporter extends Export3dFunction
 
 
        /**
-        * Export the track data to the specified file
-        * @param inFile File object to save to
+        * Export the data to the specified file(s)
+        * @param inPovFile File object to save pov file to
+        * @param inImageFile file object to save image to
+        * @param inTerrainFile file object to save terrain to
         * @return true if successful
         */
-       private boolean exportFile(File inFile)
+       private boolean exportFiles(File inPovFile, File inImageFile, File inTerrainFile)
        {
                FileWriter writer = null;
                // find out the line separator for this system
@@ -317,23 +359,83 @@ public class PovExporter extends Export3dFunction
                {
                        // create and scale model
                        ThreeDModel model = new ThreeDModel(_track);
+                       model.setModelSize(MODEL_SCALE_FACTOR);
                        try
                        {
                                // try to use given altitude cap
-                               double altFactor = Double.parseDouble(_altitudeFactorField.getText());
-                               model.setAltitudeFactor(altFactor);
+                               double givenFactor = Double.parseDouble(_altitudeFactorField.getText());
+                               if (givenFactor > 0.0) _altFactor = givenFactor;
                        }
                        catch (NumberFormatException nfe) { // parse failed, reset
-                               _altitudeFactorField.setText("1.0");
+                               _altitudeFactorField.setText("" + _altFactor);
                        }
-                       model.scale();
+                       model.setAltitudeFactor(_altFactor);
 
-                       // Create file and write basics
-                       writer = new FileWriter(inFile);
-                       writeStartOfFile(writer, model.getModelSize(), lineSeparator);
+                       // Write base image if necessary
+                       ImageDefinition imageDef = _baseImagePanel.getImageDefinition();
+                       boolean useImage = imageDef.getUseImage();
+                       if (useImage)
+                       {
+                               // Get base image from grouter
+                               MapSource mapSource = MapSourceLibrary.getSource(imageDef.getSourceIndex());
+                               MapGrouter grouter = _baseImagePanel.getGrouter();
+                               GroutedImage baseImage = grouter.getMapImage(_track, mapSource, imageDef.getZoom());
+                               try
+                               {
+                                       useImage = ImageIO.write(baseImage.getImage(), "png", inImageFile);
+                               }
+                               catch (IOException ioe) {
+                                       System.err.println("Can't write image: " + ioe.getClass().getName());
+                                       useImage = false;
+                               }
+                               if (!useImage) {
+                                       _app.showErrorMessage(getNameKey(), "dialog.exportpov.cannotmakebaseimage");
+                               }
+                       }
+
+                       boolean useTerrain = _terrainPanel.getUseTerrain();
+                       if (useTerrain)
+                       {
+                               TerrainHelper terrainHelper = new TerrainHelper(_terrainPanel.getGridSize());
+                               // See if there's a previously saved terrain track we can reuse
+                               TerrainDefinition terrainDef = new TerrainDefinition(_terrainPanel.getUseTerrain(), _terrainPanel.getGridSize());
+                               Track terrainTrack = TerrainCache.getTerrainTrack(_app.getCurrentDataStatus(), terrainDef);
+                               if (terrainTrack == null)
+                               {
+                                       // Construct the terrain track according to these extents and the grid size
+                                       terrainTrack = terrainHelper.createGridTrack(_track);
+                                       // Get the altitudes from SRTM for all the points in the track
+                                       LookupSrtmFunction srtmLookup = (LookupSrtmFunction) FunctionLibrary.FUNCTION_LOOKUP_SRTM;
+                                       srtmLookup.begin(terrainTrack);
+                                       while (srtmLookup.isRunning())
+                                       {
+                                               try {
+                                                       Thread.sleep(750);  // just polling in a wait loop isn't ideal but simple
+                                               }
+                                               catch (InterruptedException e) {}
+                                       }
+                                       // Fix the voids
+                                       terrainHelper.fixVoids(terrainTrack);
+
+                                       // Store this back in the cache, maybe we'll need it again
+                                       TerrainCache.storeTerrainTrack(terrainTrack, _app.getCurrentDataStatus(), terrainDef);
+                               }
+
+                               model.setTerrain(terrainTrack);
+                               model.scale();
+
+                               // Call TerrainHelper to write out the data from the model
+                               terrainHelper.writeHeightMap(model, inTerrainFile);
+                       }
+                       else
+                       {
+                               // No terrain required, so just scale the model as it is
+                               model.scale();
+                       }
 
-                       // write out lat/long lines using model
-                       writeLatLongLines(writer, model, lineSeparator);
+                       // Create file and write basics
+                       writer = new FileWriter(inPovFile);
+                       writeStartOfFile(writer, lineSeparator, useImage ? inImageFile : null, useTerrain ? inTerrainFile : null);
 
                        // write out points
                        if (_ballsAndSticksButton.isSelected()) {
@@ -346,7 +448,7 @@ public class PovExporter extends Export3dFunction
                        // everything worked
                        UpdateMessageBroker.informSubscribers(I18nManager.getText("confirm.save.ok1")
                                 + " " + _track.getNumPoints() + " " + I18nManager.getText("confirm.save.ok2")
-                                + " " + inFile.getAbsolutePath());
+                                + " " + inPovFile.getAbsolutePath());
                        return true;
                }
                catch (IOException ioe)
@@ -370,14 +472,17 @@ public class PovExporter extends Export3dFunction
        /**
         * Write the start of the Pov file, including base plane and lights
         * @param inWriter Writer to use for writing file
-        * @param inModelSize model size
         * @param inLineSeparator line separator to use
+        * @param inImageFile image file to reference (or null if none)
+        * @param inTerrainFile terrain file to reference (or null if none)
         * @throws IOException on file writing error
         */
-       private void writeStartOfFile(FileWriter inWriter, double inModelSize, String inLineSeparator)
+       private void writeStartOfFile(FileWriter inWriter, String inLineSeparator, File inImageFile, File inTerrainFile)
        throws IOException
        {
-               inWriter.write("// Pov file produced by GpsPrune - see http://activityworkshop.net/");
+               inWriter.write("// Pov file produced by GpsPrune - see https://gpsprune.activityworkshop.net/");
+               inWriter.write(inLineSeparator);
+               inWriter.write("#version 3.6;");
                inWriter.write(inLineSeparator);
                inWriter.write(inLineSeparator);
                // Select font based on user input
@@ -389,6 +494,23 @@ public class PovExporter extends Export3dFunction
                else {
                        Config.setConfigString(Config.KEY_POVRAY_FONT, fontPath);
                }
+
+               // Make the definition of the base plane depending on whether there's an image or not
+               final boolean useImage = (inImageFile != null);
+               final boolean useImageOnBox = useImage && (inTerrainFile == null);
+               final String boxDefinition = (useImageOnBox ?
+                       "   <0, 0, 0>, <1, 1, 0.001>" + inLineSeparator
+                               + "   pigment {image_map { png \"" + inImageFile.getName() + "\" map_type 0 interpolate 2 once } }" + inLineSeparator
+                               + "   scale 20.0 rotate <90, 0, 0>" + inLineSeparator
+                               + "   translate <-10.0, 0, -10.0>"
+                       : "   <-10.0, -0.15, -10.0>," + inLineSeparator
+                               + "   <10.0, 0.0, 10.0>" + inLineSeparator
+                               + "   pigment { color rgb <0.5 0.75 0.8> }");
+               // TODO: Maybe could use the same geometry for the imageless case, would simplify code a bit
+
+               // Definition of terrain shape if any
+               final String terrainDefinition = makeTerrainString(inTerrainFile, inImageFile, inLineSeparator);
+
                // Set up output
                String[] outputLines = {
                  "global_settings { ambient_light rgb <4, 4, 4> }", "",
@@ -401,27 +523,15 @@ public class PovExporter extends Export3dFunction
                  "}", "",
                // global declares
                  "// Global declares",
-                 "#declare lat_line =",
-                 "  cylinder {",
-                 "   <-" + inModelSize + ", 0.1, 0>,",
-                 "   <" + inModelSize + ", 0.1, 0>,",
-                 "   0.1            // Radius",
-                 "   pigment { color rgb <0.5 0.5 0.5> }",
-                 "  }",
-                 "#declare lon_line =",
-                 "  cylinder {",
-                 "   <0, 0.1, -" + inModelSize + ">,",
-                 "   <0, 0.1, " + inModelSize + ">,",
-                 "   0.1            // Radius",
-                 "   pigment { color rgb <0.5 0.5 0.5> }",
-                 "  }",
                  "#declare point_rod =",
                  "  cylinder {",
                  "   <0, 0, 0>,",
                  "   <0, 1, 0>,",
                  "   0.15",
                  "   open",
-                 "   pigment { color rgb <0.5 0.5 0.5> }",
+                 "   texture {",
+                 "    pigment { color rgb <0.5 0.5 0.5> }",
+                 useImage ? "   } no_shadow" : "   }",
                  "  }", "",
                  // MAYBE: Export rods to POV?  How to store in data?
                  "#declare waypoint_sphere =",
@@ -430,7 +540,7 @@ public class PovExporter extends Export3dFunction
                  "    texture {",
                  "       pigment {color rgb <0.1 0.1 1.0>}",
                  "       finish { phong 1 }",
-                 "    }",
+                 useImage ? "    } no_shadow" : "    }",
                  "  }",
                  "#declare track_sphere0 =",
                  "  sphere {",
@@ -491,31 +601,31 @@ public class PovExporter extends Export3dFunction
                  "#declare wall_colour = rgbt <0.5, 0.5, 0.5, 0.3>;", "",
                  "// Base plane",
                  "box {",
-                 "   <-" + inModelSize + ", -0.15, -" + inModelSize + ">,  // Near lower left corner",
-                 "   <" + inModelSize + ", 0.15, " + inModelSize + ">   // Far upper right corner",
-                 "   pigment { color rgb <0.5 0.75 0.8> }",
+                 boxDefinition,
                  "}", "",
+                 // terrain
+                 terrainDefinition,
                // write cardinals
                  "// Cardinal letters N,S,E,W",
                  "text {",
                  "  ttf \"" + fontPath + "\" \"" + I18nManager.getText("cardinal.n") + "\" 0.3, 0",
                  "  pigment { color rgb <1 1 1> }",
-                 "  translate <0, 0.2, " + inModelSize + ">",
+                 "  translate <0, 0.2, 10.0>",
                  "}",
                  "text {",
                  "  ttf \"" + fontPath + "\" \"" + I18nManager.getText("cardinal.s") + "\" 0.3, 0",
                  "  pigment { color rgb <1 1 1> }",
-                 "  translate <0, 0.2, -" + inModelSize + ">",
+                 "  translate <0, 0.2, -10.0>",
                  "}",
                  "text {",
                  "  ttf \"" + fontPath + "\" \"" + I18nManager.getText("cardinal.e") + "\" 0.3, 0",
                  "  pigment { color rgb <1 1 1> }",
-                 "  translate <" + (inModelSize * 0.97) + ", 0.2, 0>",
+                 "  translate <9.7, 0.2, 0>",
                  "}",
                  "text {",
                  "  ttf \"" + fontPath + "\" \"" + I18nManager.getText("cardinal.w") + "\" 0.3, 0",
                  "  pigment { color rgb <1 1 1> }",
-                 "  translate <-" + (inModelSize * 1.03) + ", 0.2, 0>",
+                 "  translate <-10.3, 0.2, 0>",
                  "}", "",
                  // MAYBE: Light positions should relate to model size
                  "// lights",
@@ -533,37 +643,32 @@ public class PovExporter extends Export3dFunction
                }
        }
 
-
        /**
-        * Write out all the lat and long lines to the file
-        * @param inWriter Writer to use for writing file
-        * @param inModel model object for getting lat/long lines
-        * @param inLineSeparator line separator to use
-        * @throws IOException on file writing error
+        * Make a description of the height_field object for the terrain, depending on terrain and image
+        * @param inTerrainFile terrain file, or null if none
+        * @param inImageFile image file, or null if none
+        * @param inLineSeparator line separator
+        * @return String for inserting into pov file
         */
-       private static void writeLatLongLines(FileWriter inWriter, ThreeDModel inModel, String inLineSeparator)
-       throws IOException
+       private static String makeTerrainString(File inTerrainFile, File inImageFile, String inLineSeparator)
        {
-               inWriter.write("// Latitude and longitude lines:");
-               inWriter.write(inLineSeparator);
-               int numlines = inModel.getLatitudeLines().length;
-               for (int i=0; i<numlines; i++)
-               {
-                       // write cylinder to file
-                       inWriter.write("object { lat_line translate <0, 0, " + inModel.getScaledLatitudeLine(i) + "> }");
-                       inWriter.write(inLineSeparator);
+               if (inTerrainFile == null) {return "";}
+               StringBuilder sb = new StringBuilder();
+               sb.append("//Terrain").append(inLineSeparator)
+                       .append("height_field {").append(inLineSeparator)
+                       .append("\tpng \"").append(inTerrainFile.getName()).append("\" smooth").append(inLineSeparator)
+                       .append("\tfinish {diffuse 0.7 phong 0.2}").append(inLineSeparator);
+               if (inImageFile != null) {
+                       sb.append("\tpigment {image_map { png \"").append(inImageFile.getName()).append("\"  } rotate x*90}").append(inLineSeparator);
                }
-               numlines = inModel.getLongitudeLines().length;
-               for (int i=0; i<numlines; i++)
-               {
-                       // write cylinder to file
-                       inWriter.write("object { lon_line translate <" + inModel.getScaledLongitudeLine(i) + ", 0, 0> }");
-                       inWriter.write(inLineSeparator);
+               else {
+                       sb.append("\tpigment {color rgb <0.55 0.7 0.55> }").append(inLineSeparator);
                }
-               inWriter.write(inLineSeparator);
+               sb.append("\tscale 20.0").append(inLineSeparator)
+                       .append("\ttranslate <-10.0, 0, -10.0>").append(inLineSeparator).append("}");
+               return sb.toString();
        }
 
-
        /**
         * Write out all the data points to the file in the balls-and-sticks style
         * @param inWriter Writer to use for writing file
@@ -619,7 +724,6 @@ public class PovExporter extends Export3dFunction
                inWriter.write("// Data points:");
                inWriter.write(inLineSeparator);
                int numPoints = inModel.getNumPoints();
-               int numTrackPoints = 0;
                // Loop over all points and write out waypoints as balls
                for (int i=0; i<numPoints; i++)
                {
@@ -637,7 +741,6 @@ public class PovExporter extends Export3dFunction
                                }
                                inWriter.write(inLineSeparator);
                        }
-                       else {numTrackPoints++;}
                }
                inWriter.write(inLineSeparator);
 
@@ -761,7 +864,7 @@ public class PovExporter extends Export3dFunction
 
        /**
         * @param inCode height code to check
-        * @return validated height code within range 0 to max
+        * @return validated height code within range 0 to maxHeightCode
         */
        private static byte checkHeightCode(byte inCode)
        {