// **********************************************************************
//
// <copyright>
//
// BBN Technologies
// 10 Moulton Street
// Cambridge, MA 02138
// (617) 873-8000
//
// Copyright (C) BBNT Solutions LLC. All rights reserved.
//
// </copyright>
// **********************************************************************
//
// $Source: /cvs/distapps/openmap/src/openmap/com/bbn/openmap/layer/terrain/ProfileGenerator.java,v $
// $RCSfile: ProfileGenerator.java,v $
// $Revision: 1.6.2.3 $
// $Date: 2006/02/27 16:13:50 $
// $Author: dietrick $
//
// **********************************************************************
package com.bbn.openmap.layer.terrain;
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import com.bbn.openmap.LatLonPoint;
import com.bbn.openmap.image.AcmeGifFormatter;
import com.bbn.openmap.dataAccess.dted.DTEDFrameCache;
import com.bbn.openmap.layer.util.stateMachine.*;
import com.bbn.openmap.omGraphics.*;
import com.bbn.openmap.proj.*;
import com.bbn.openmap.util.Debug;
/**
* This tool lets the user draw a line on the map, and then presents
* the profile of the path in a GIF picture. The line can be drawn in
* a series if clicks, or the mouse button can be held down as the
* mouse is dragged around. The lines are drawn as great circle lines,
* which represent the straight geographical line between clicks.
*
* <P>
* The profile tool uses the ProfileStateMachine, and the Profile
* States, to keep track of the proper actions and reactions of user
* input.
*/
public class ProfileGenerator implements TerrainTool {
/** The color of the line that is drawn on the screen. */
Color toolColor = new Color(255, 0, 0);
/** The state machine for user gestures. */
protected ProfileStateMachine stateMachine;
/** The layer that the tool is serving. */
protected TerrainLayer layer;
/** The list of graphics to draw. Contains the drawn line. */
protected OMGraphicList graphics = new OMGraphicList();
/**
* Array of LatLonPoints. The points are the clicked points, and
* the points in between, on a great circle. Have to figure these
* points out, and not rely only on the poly line points, because
* we need to get the elevations for all the points for the
* profile.
*/
public Vector coords;
/**
* These are the raw x-y points of the gestures, for the great
* circle line points, too. These are used to construct the
* profile image. An array of java.awt.Points.
*/
public Vector xypoints;
/**
* The line drawn on the screen representing the profile line
* path.
*/
public OMPoly profileLine;
/**
* General gesture tracking, Used to track the last place of
* interest on the screen for the creation of hte profile.
*/
MouseEvent lastMouse;
/**
* A copy of the most current projection to use to update the
* drawn line.
*/
Projection proj;
public ProfileGenerator(TerrainLayer tLayer) {
layer = tLayer;
init();
}
public synchronized OMGraphicList getGraphics() {
profileLine.setLocation(setLLPoints(), OMGraphic.RADIANS);
profileLine.generate(proj);
return graphics;
}
/**
* Create the line object, the state machine, and the vectors used
* to keep track of the line being drawn.
*/
public void init() {
lastMouse = null;
coords = new Vector();
xypoints = new Vector();
profileLine = new OMPoly(setLLPoints(), OMGraphic.RADIANS, OMGraphic.LINETYPE_GREATCIRCLE);
profileLine.setLinePaint(toolColor);
graphics.add(profileLine);
// System.loadLibrary("com_bbn_openmap_terrain_ProfileGenerator");
stateMachine = new ProfileStateMachine(this);
}
/**
* Clears the line from the screen, and resets the state machine.
*/
public void reset() {
coords.removeAllElements();
xypoints.removeAllElements();
profileLine.setLocation(setLLPoints(), OMGraphic.RADIANS);
stateMachine.reset();
layer.repaint();
lastMouse = null;
}
public void setScreenParameters(Projection p) {
proj = p;
graphics.generate(p);
}
/**
* Returns a set of lat lon points that represent the line as it
* was drawn. The lat lon points are in an array of floats, that
* alternate, lat, lon, etc.
*/
public float[] setLLPoints() {
float[] points;
int num_points = coords.size();
if (num_points <= 1) {
points = new float[4];
if (num_points == 0) {
points[0] = 0f;
points[1] = -6f;
} else {
points[0] = ((LatLonPoint) coords.elementAt(0)).radlat_;
points[1] = ((LatLonPoint) coords.elementAt(0)).radlon_;
}
points[2] = points[0];
points[3] = points[1];
} else {
points = new float[coords.size() * 2];
for (int i = 0; i < coords.size(); i++) {
points[i * 2] = ((LatLonPoint) coords.elementAt(i)).radlat_;
points[(i * 2) + 1] = ((LatLonPoint) coords.elementAt(i)).radlon_;
}
}
return points;
}
/**
* Returns the current state of the state machine.
*/
public State getState() {
return stateMachine.getState();
}
/**
* Creates the line points for the path drawn on the screen, and
* collects the elevation values for those points. Makes the call
* to write the new gif file to disk.
*/
public void createProfileImage() {
Debug.message("terrain",
"ProfileGenerator:createProfileImage(): Creating image");
if (layer == null || layer.frameCache == null) {
Debug.error("ProfileGenerator: can't access the DTED data through the terrain layer.");
return;
}
// Set the final line, as it was drawn.
profileLine.setLocation(setLLPoints(), OMGraphic.RADIANS);
int total_distance = 0;
int[] distances = new int[xypoints.size()];
Point tmpPoint1, tmpPoint2;
distances[0] = 0;
for (int j = 1; j < xypoints.size(); j++) {
tmpPoint1 = (Point) xypoints.elementAt(j);
tmpPoint2 = (Point) xypoints.elementAt(j - 1);
// Needed for the GIF, the number of pixels (distance)
// between points of the line. The distances array is the
// distance between this point and the next in the xy
// point array.
distances[j] = TerrainLayer.numPixelsBetween(tmpPoint1.x,
tmpPoint1.y,
tmpPoint2.x,
tmpPoint2.y);
total_distance += distances[j];
}
int tmp = 0;
int max = 0;
int[] heights = new int[xypoints.size()];
// Go through the points and get the heights
for (int i = 0; i < heights.length; i++) {
LatLonPoint llp = ((LatLonPoint) coords.elementAt(i));
// Ask the cache for the elevation
tmp = layer.frameCache.getElevation(llp.getLatitude(),
llp.getLongitude());
if (tmp == DTEDFrameCache.NO_DATA)
tmp = -1;
if (tmp > max)
max = tmp;
heights[i] = tmp;
}
// get the picture drawn and written
createGIFFile(total_distance, max, distances, heights);
}
/**
* Create the image and write it the location.
*
* @param distance total length of line, in pixels
* @param max highest point, in meters of all the heights in the
* line.
* @param post_dist array of pixel distances between the points
* @param post_height the array of heights
*/
protected void createGIFFile(int distance, int max, int[] post_dist,
int[] post_height) {
int box_height_buffer = 20;
int gif_height_buffer = 20;
int gif_width_buffer = 20;
int text_width = 100;
int box_height = max + (box_height_buffer * 2);
int box_width = distance;
int gif_height = box_height + (gif_height_buffer * 2);
int gif_width = box_width + (gif_width_buffer * 2) + text_width;
AcmeGifFormatter formatter = new AcmeGifFormatter();
java.awt.Graphics graphics = formatter.getGraphics(gif_width,
gif_height);
// Color gray10 = new Color(25, 25, 25);
Color gray50 = new Color(128, 128, 128);
// Color gray75 = new Color(191, 191, 191);
Color gray90 = new Color(230, 230, 230);
Debug.message("terrain",
"ProfileGenerator gif creation: drawing boundaries");
/* Fill in the generic colors */
graphics.setColor(gray90);
graphics.fillRect(0, 0, gif_width, gif_height);
graphics.setColor(gray50);
graphics.fillRect(gif_width_buffer,
gif_height_buffer,
box_width,
box_height);
Debug.message("terrain", "ProfileGenerator gif creation: drawing edges");
// outside edge
graphics.setColor(Color.black);
graphics.drawRect(0, 0, gif_width - 1, gif_height - 1);
// inside edge
graphics.drawRect(gif_width_buffer,
gif_height_buffer,
box_width,
box_height);
graphics.setColor(Color.yellow);
// 0 height line
graphics.drawLine(gif_width_buffer + 1,
gif_height_buffer + box_height - box_height_buffer,
gif_width_buffer + box_width - 1,
gif_height_buffer + box_height - box_height_buffer);
// These are the horizontal reference lines in the image.
graphics.setColor(Color.black);
FontMetrics f = graphics.getFontMetrics();
Debug.message("terrain",
"ProfileGenerator gif creation: drawing level lines");
for (int i = 1; i < 9; i++) {
graphics.drawLine(gif_width_buffer, gif_height_buffer + box_height
- box_height_buffer - (max * i / 8), gif_width_buffer
+ box_width + 5, gif_height_buffer + box_height
- box_height_buffer - (max * i / 8));
int meters = max * i / 8;
int feet = (int) (meters * 3.2);
String lineLabel = meters + "m / " + feet + "ft";
// byte[] lineLabelBytes = lineLabel.getBytes();
graphics.drawString(lineLabel,
gif_width_buffer + box_width + 10,
gif_height_buffer + box_height - box_height_buffer
- (max * i / 8) + (f.getAscent() / 2));
}
// int last_x = gif_width_buffer + 1;
// int last_height = gif_height_buffer + box_height - box_height_buffer
// - post_height[0];
int total_distance = 0;
Debug.message("terrain",
"ProfileGenerator gif creation: drawing profile");
graphics.setColor(Color.red);
for (int i = 1; i < post_height.length; i++) {
graphics.drawLine(gif_width_buffer + total_distance,
gif_height_buffer + box_height - box_height_buffer
- post_height[i - 1],
gif_width_buffer + post_dist[i] + total_distance,
gif_height_buffer + box_height - box_height_buffer
- post_height[i]);
total_distance += post_dist[i];
}
javax.swing.ImageIcon ii = new javax.swing.ImageIcon(formatter.getBufferedImage());
javax.swing.JFrame jf = com.bbn.openmap.util.PaletteHelper.getPaletteWindow(new javax.swing.JLabel(ii),
"Path Profile",
(ComponentListener) null);
jf.setVisible(true);
// byte[] imageBytes = formatter.getImageBytes();
// String tmppath = null;
// try {
// String tmpDir = Environment.get(Environment.TmpDir);
// if (tmpDir != null) {
// tmppath = tmpDir + File.separator + "openmap-" +
// Environment.timestamp() + ".gif";
// FileOutputStream fs = new FileOutputStream(tmppath);
// fs.write(imageBytes);
// fs.close(); // close the streams
// String url = "file://" + tmppath;
// layer.fireRequestURL(url);
// } else {
// Debug.error("ProfileGenerator: can't create image file,
// because the openmap.TempDirectory was not set.");
// }
// } catch (IOException e) {
// Debug.error("ProfileGenerator: Cannot write to temp file:"
// +
// Environment.get("line.separator") +
// "\"" + tmppath + "\"");
// }
// String imageString = new String(imageBytes);
// layer.fireRequestBrowserContent(imageString);
}
/**
* Used to keep track of another point for the line, as determined
* by the state machine.
*
* @param event Mouse event that supplies the location
*/
protected void addProfileEvent(MouseEvent event) {
LatLonPoint llp = proj.inverse(event.getX(), event.getY());
if (lastMouse != null) {
// Check for proximity of the click, since a double
// click means the end of the line.
if ((Math.abs(lastMouse.getX() - event.getX()) > MAX_SPACE_BETWEEN_PIXELS)
|| (Math.abs(lastMouse.getY() - event.getY()) > MAX_SPACE_BETWEEN_PIXELS)) {
// The line may need to be broken up into smaller
// segments in order for it to be a true straight
// line, to figure out the segments. The interior
// points are added to the vector.
addGreatCirclePoints(lastMouse, event);
// Now add the end point to the vector
coords.addElement(llp);
// The xy points don't need the interior points, the
// line gets these points and figures them out for
// itself. This may be redundant is some way.
xypoints.addElement(event.getPoint());
}
} else {
coords.addElement(llp);
xypoints.addElement(event.getPoint());
}
lastMouse = event;
// Reset the line to have all the new points
profileLine.setLocation(setLLPoints(), OMGraphic.RADIANS);
profileLine.generate(proj);
}
/**
* Figure out the internal points to create a great circle line
* between two points on the screen. The interior points are added
* to the coords array, but not to the xy points array.
*
* @param beginning the starting mouse event
* @param ending the ending mouse event
*/
protected void addGreatCirclePoints(MouseEvent beginning, MouseEvent ending) {
LatLonPoint beg = proj.inverse(beginning.getX(), beginning.getY());
LatLonPoint end = proj.inverse(ending.getX(), ending.getY());
int num_points = (TerrainLayer.numPixelsBetween(beginning.getX(),
beginning.getY(),
ending.getX(),
ending.getY()) - 2)
/ MAX_SPACE_BETWEEN_PIXELS;
float[] radPoints = GreatCircle.great_circle(beg.radlat_,
beg.radlon_,
end.radlat_,
end.radlon_,
num_points,
true);
for (int i = 0; i < radPoints.length; i++) {
coords.addElement(new LatLonPoint(radPoints[i], radPoints[i + 1], true));
Point pt = new Point();
proj.forward(radPoints[i], radPoints[i + 1], pt, true);
xypoints.addElement(pt);
// System.out.println("addCGPoints: point " + i + " lat="
// +
// RadianPoint.radToDeg(radPoints[i].lat) + ", lon=" +
// RadianPoint.radToDeg(radPoints[i].lon) + ", x=" +
// (short)pt.x + ", y=" + (short)pt.y);
i++;
}
}
}