001// License: GPL. For details, see LICENSE file. 002package org.openstreetmap.josm.gui.layer.gpx; 003 004import static org.openstreetmap.josm.tools.I18n.marktr; 005import static org.openstreetmap.josm.tools.I18n.tr; 006 007import java.awt.AlphaComposite; 008import java.awt.BasicStroke; 009import java.awt.Color; 010import java.awt.Composite; 011import java.awt.Graphics2D; 012import java.awt.LinearGradientPaint; 013import java.awt.MultipleGradientPaint; 014import java.awt.Paint; 015import java.awt.Point; 016import java.awt.Rectangle; 017import java.awt.RenderingHints; 018import java.awt.Stroke; 019import java.awt.image.BufferedImage; 020import java.awt.image.DataBufferInt; 021import java.awt.image.Raster; 022import java.io.BufferedReader; 023import java.io.IOException; 024import java.util.ArrayList; 025import java.util.Arrays; 026import java.util.Collection; 027import java.util.Collections; 028import java.util.Date; 029import java.util.LinkedList; 030import java.util.List; 031import java.util.Random; 032 033import javax.swing.ImageIcon; 034 035import org.openstreetmap.josm.data.Bounds; 036import org.openstreetmap.josm.data.PreferencesUtils; 037import org.openstreetmap.josm.data.SystemOfMeasurement; 038import org.openstreetmap.josm.data.SystemOfMeasurement.SoMChangeListener; 039import org.openstreetmap.josm.data.coor.LatLon; 040import org.openstreetmap.josm.data.gpx.GpxConstants; 041import org.openstreetmap.josm.data.gpx.GpxData; 042import org.openstreetmap.josm.data.gpx.GpxData.GpxDataChangeEvent; 043import org.openstreetmap.josm.data.gpx.GpxData.GpxDataChangeListener; 044import org.openstreetmap.josm.data.gpx.WayPoint; 045import org.openstreetmap.josm.data.preferences.NamedColorProperty; 046import org.openstreetmap.josm.gui.MapView; 047import org.openstreetmap.josm.gui.MapViewState; 048import org.openstreetmap.josm.gui.layer.GpxLayer; 049import org.openstreetmap.josm.gui.layer.MapViewGraphics; 050import org.openstreetmap.josm.gui.layer.MapViewPaintable; 051import org.openstreetmap.josm.gui.layer.MapViewPaintable.MapViewEvent; 052import org.openstreetmap.josm.gui.layer.MapViewPaintable.PaintableInvalidationEvent; 053import org.openstreetmap.josm.gui.layer.MapViewPaintable.PaintableInvalidationListener; 054import org.openstreetmap.josm.io.CachedFile; 055import org.openstreetmap.josm.spi.preferences.Config; 056import org.openstreetmap.josm.tools.ColorScale; 057import org.openstreetmap.josm.tools.JosmRuntimeException; 058import org.openstreetmap.josm.tools.Logging; 059import org.openstreetmap.josm.tools.Utils; 060 061/** 062 * Class that helps to draw large set of GPS tracks with different colors and options 063 * @since 7319 064 */ 065public class GpxDrawHelper implements SoMChangeListener, MapViewPaintable.LayerPainter, PaintableInvalidationListener, GpxDataChangeListener { 066 067 /** 068 * The color that is used for drawing GPX points. 069 * @since 10824 070 */ 071 public static final NamedColorProperty DEFAULT_COLOR = new NamedColorProperty(marktr("gps point"), Color.magenta); 072 073 private final GpxData data; 074 private final GpxLayer layer; 075 076 // draw lines between points belonging to different segments 077 private boolean forceLines; 078 // use alpha blending for line draw 079 private boolean alphaLines; 080 // draw direction arrows on the lines 081 private boolean direction; 082 /** width of line for paint **/ 083 private int lineWidth; 084 /** don't draw lines if longer than x meters **/ 085 private int maxLineLength; 086 // draw lines 087 private boolean lines; 088 /** paint large dots for points **/ 089 private boolean large; 090 private int largesize; 091 private boolean hdopCircle; 092 /** paint direction arrow with alternate math. may be faster **/ 093 private boolean alternateDirection; 094 /** don't draw arrows nearer to each other than this **/ 095 private int delta; 096 private double minTrackDurationForTimeColoring; 097 098 /** maximum value of displayed HDOP, minimum is 0 */ 099 private int hdoprange; 100 101 private static final double PHI = Utils.toRadians(15); 102 103 //// Variables used only to check cache validity 104 private boolean computeCacheInSync; 105 private int computeCacheMaxLineLengthUsed; 106 private Color computeCacheColorUsed; 107 private boolean computeCacheColorDynamic; 108 private ColorMode computeCacheColored; 109 private int computeCacheColorTracksTune; 110 private int computeCacheHeatMapDrawColorTableIdx; 111 private boolean computeCacheHeatMapDrawPointMode; 112 private int computeCacheHeatMapDrawGain; 113 private int computeCacheHeatMapDrawLowerLimit; 114 115 //// Color-related fields 116 /** Mode of the line coloring **/ 117 private ColorMode colored; 118 /** max speed for coloring - allows to tweak line coloring for different speed levels. **/ 119 private int colorTracksTune; 120 private boolean colorModeDynamic; 121 private Color neutralColor; 122 private int largePointAlpha; 123 124 // default access is used to allow changing from plugins 125 private ColorScale velocityScale; 126 /** Colors (without custom alpha channel, if given) for HDOP painting. **/ 127 private ColorScale hdopScale; 128 private ColorScale dateScale; 129 private ColorScale directionScale; 130 131 /** Opacity for hdop points **/ 132 private int hdopAlpha; 133 134 // lookup array to draw arrows without doing any math 135 private static final int ll0 = 9; 136 private static final int sl4 = 5; 137 private static final int sl9 = 3; 138 private static final int[][] dir = { 139 {+sl4, +ll0, +ll0, +sl4}, {-sl9, +ll0, +sl9, +ll0}, 140 {-ll0, +sl4, -sl4, +ll0}, {-ll0, -sl9, -ll0, +sl9}, 141 {-sl4, -ll0, -ll0, -sl4}, {+sl9, -ll0, -sl9, -ll0}, 142 {+ll0, -sl4, +sl4, -ll0}, {+ll0, +sl9, +ll0, -sl9} 143 }; 144 145 /** heat map parameters **/ 146 147 // enabled or not (override by settings) 148 private boolean heatMapEnabled; 149 // draw small extra line 150 private boolean heatMapDrawExtraLine; 151 // used index for color table (parameter) 152 private int heatMapDrawColorTableIdx; 153 // use point or line draw mode 154 private boolean heatMapDrawPointMode; 155 // extra gain > 0 or < 0 attenuation, 0 = default 156 private int heatMapDrawGain; 157 // do not draw elements with value lower than this limit 158 private int heatMapDrawLowerLimit; 159 160 // normal buffered image and draw object (cached) 161 private BufferedImage heatMapImgGray; 162 private Graphics2D heatMapGraph2d; 163 164 // some cached values 165 Rectangle heatMapCacheScreenBounds = new Rectangle(); 166 MapViewState heatMapMapViewState; 167 int heatMapCacheLineWith; 168 169 // copied value for line drawing 170 private final List<Integer> heatMapPolyX = new ArrayList<>(); 171 private final List<Integer> heatMapPolyY = new ArrayList<>(); 172 173 // setup color maps used by heat map 174 private static Color[] heatMapLutColorJosmInferno = createColorFromResource("inferno"); 175 private static Color[] heatMapLutColorJosmViridis = createColorFromResource("viridis"); 176 private static Color[] heatMapLutColorJosmBrown2Green = createColorFromResource("brown2green"); 177 private static Color[] heatMapLutColorJosmRed2Blue = createColorFromResource("red2blue"); 178 179 // user defined heatmap color 180 private Color[] heatMapLutColor = createColorLut(0, Color.BLACK, Color.WHITE); 181 182 // The heat map was invalidated since the last draw. 183 private boolean gpxLayerInvalidated; 184 185 private void setupColors() { 186 hdopAlpha = Config.getPref().getInt("hdop.color.alpha", -1); 187 velocityScale = ColorScale.createHSBScale(256); 188 /** Colors (without custom alpha channel, if given) for HDOP painting. **/ 189 hdopScale = ColorScale.createHSBScale(256).makeReversed().addTitle(tr("HDOP")); 190 dateScale = ColorScale.createHSBScale(256).addTitle(tr("Time")); 191 directionScale = ColorScale.createCyclicScale(256).setIntervalCount(4).addTitle(tr("Direction")); 192 193 systemOfMeasurementChanged(null, null); 194 } 195 196 @Override 197 public void systemOfMeasurementChanged(String oldSoM, String newSoM) { 198 SystemOfMeasurement som = SystemOfMeasurement.getSystemOfMeasurement(); 199 velocityScale.addTitle(tr("Velocity, {0}", som.speedName)); 200 layer.invalidate(); 201 } 202 203 /** 204 * Different color modes 205 */ 206 public enum ColorMode { 207 /** 208 * No special colors 209 */ 210 NONE, 211 /** 212 * Color by velocity 213 */ 214 VELOCITY, 215 /** 216 * Color by accuracy 217 */ 218 HDOP, 219 /** 220 * Color by traveling direction 221 */ 222 DIRECTION, 223 /** 224 * Color by time 225 */ 226 TIME, 227 /** 228 * Color using a heatmap instead of normal lines 229 */ 230 HEATMAP; 231 232 static ColorMode fromIndex(final int index) { 233 return values()[index]; 234 } 235 236 int toIndex() { 237 return Arrays.asList(values()).indexOf(this); 238 } 239 } 240 241 /** 242 * Constructs a new {@code GpxDrawHelper}. 243 * @param gpxLayer The layer to draw 244 * @since 12157 245 */ 246 public GpxDrawHelper(GpxLayer gpxLayer) { 247 layer = gpxLayer; 248 data = gpxLayer.data; 249 data.addChangeListener(this); 250 251 layer.addInvalidationListener(this); 252 SystemOfMeasurement.addSoMChangeListener(this); 253 setupColors(); 254 } 255 256 private static String specName(String layerName) { 257 return "layer " + layerName; 258 } 259 260 /** 261 * Get the default color for gps tracks for specified layer 262 * @param layerName name of the GpxLayer 263 * @param ignoreCustom do not use preferences 264 * @return the color or null if the color is not constant 265 */ 266 public Color getColor(String layerName, boolean ignoreCustom) { 267 if (ignoreCustom || getColorMode(layerName) == ColorMode.NONE) { 268 return DEFAULT_COLOR.getChildColor( 269 NamedColorProperty.COLOR_CATEGORY_LAYER, 270 layerName, 271 DEFAULT_COLOR.getName()).get(); 272 } else { 273 return null; 274 } 275 } 276 277 /** 278 * Read coloring mode for specified layer from preferences 279 * @param layerName name of the GpxLayer 280 * @return coloring mode 281 */ 282 public ColorMode getColorMode(String layerName) { 283 try { 284 int i = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.colors", specName(layerName), 0); 285 return ColorMode.fromIndex(i); 286 } catch (IndexOutOfBoundsException e) { 287 Logging.warn(e); 288 } 289 return ColorMode.NONE; 290 } 291 292 /** Reads generic color from preferences (usually gray) 293 * @return the color 294 **/ 295 public static Color getGenericColor() { 296 return DEFAULT_COLOR.get(); 297 } 298 299 /** 300 * Read all drawing-related settings from preferences 301 * @param layerName layer name used to access its specific preferences 302 **/ 303 public void readPreferences(String layerName) { 304 String spec = specName(layerName); 305 forceLines = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.lines.force", spec, false); 306 direction = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.direction", spec, false); 307 lineWidth = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.linewidth", spec, 0); 308 alphaLines = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.lines.alpha-blend", spec, false); 309 310 if (!data.fromServer) { 311 maxLineLength = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.max-line-length.local", spec, -1); 312 lines = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.lines.local", spec, true); 313 } else { 314 maxLineLength = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.max-line-length", spec, 200); 315 lines = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.lines", spec, true); 316 } 317 large = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.large", spec, false); 318 largesize = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.large.size", spec, 3); 319 hdopCircle = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.hdopcircle", spec, false); 320 colored = getColorMode(layerName); 321 alternateDirection = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.alternatedirection", spec, false); 322 delta = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.min-arrow-distance", spec, 40); 323 colorTracksTune = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.colorTracksTune", spec, 45); 324 colorModeDynamic = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.colors.dynamic", spec, false); 325 /* good HDOP's are between 1 and 3, very bad HDOP's go into 3 digit values */ 326 hdoprange = Config.getPref().getInt("hdop.range", 7); 327 minTrackDurationForTimeColoring = Config.getPref().getInt("draw.rawgps.date-coloring-min-dt", 60); 328 largePointAlpha = Config.getPref().getInt("draw.rawgps.large.alpha", -1) & 0xFF; 329 330 // get heatmap parameters 331 heatMapEnabled = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.heatmap.enabled", spec, false); 332 heatMapDrawExtraLine = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.heatmap.line-extra", spec, false); 333 heatMapDrawColorTableIdx = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.heatmap.colormap", spec, 0); 334 heatMapDrawPointMode = PreferencesUtils.getBoolean(Config.getPref(), "draw.rawgps.heatmap.use-points", spec, false); 335 heatMapDrawGain = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.heatmap.gain", spec, 0); 336 heatMapDrawLowerLimit = PreferencesUtils.getInteger(Config.getPref(), "draw.rawgps.heatmap.lower-limit", spec, 0); 337 338 // shrink to range 339 heatMapDrawGain = Utils.clamp(heatMapDrawGain, -10, 10); 340 341 neutralColor = getColor(layerName, true); 342 velocityScale.setNoDataColor(neutralColor); 343 dateScale.setNoDataColor(neutralColor); 344 hdopScale.setNoDataColor(neutralColor); 345 directionScale.setNoDataColor(neutralColor); 346 347 largesize += lineWidth; 348 } 349 350 @Override 351 public void paint(MapViewGraphics graphics) { 352 List<WayPoint> visibleSegments = listVisibleSegments(graphics.getClipBounds().getLatLonBoundsBox()); 353 if (!visibleSegments.isEmpty()) { 354 readPreferences(layer.getName()); 355 drawAll(graphics.getDefaultGraphics(), graphics.getMapView(), visibleSegments); 356 if (graphics.getMapView().getLayerManager().getActiveLayer() == layer) { 357 drawColorBar(graphics.getDefaultGraphics(), graphics.getMapView()); 358 } 359 } 360 } 361 362 private List<WayPoint> listVisibleSegments(Bounds box) { 363 WayPoint last = null; 364 LinkedList<WayPoint> visibleSegments = new LinkedList<>(); 365 366 ensureTrackVisibilityLength(); 367 for (Collection<WayPoint> segment : data.getLinesIterable(layer.trackVisibility)) { 368 369 for (WayPoint pt : segment) { 370 Bounds b = new Bounds(pt.getCoor()); 371 if (pt.drawLine && last != null) { 372 b.extend(last.getCoor()); 373 } 374 if (b.intersects(box)) { 375 if (last != null && (visibleSegments.isEmpty() 376 || visibleSegments.getLast() != last)) { 377 if (last.drawLine) { 378 WayPoint l = new WayPoint(last); 379 l.drawLine = false; 380 visibleSegments.add(l); 381 } else { 382 visibleSegments.add(last); 383 } 384 } 385 visibleSegments.add(pt); 386 } 387 last = pt; 388 } 389 } 390 return visibleSegments; 391 } 392 393 /** ensures the trackVisibility array has the correct length without losing data. 394 * TODO: Make this nicer by syncing the trackVisibility automatically. 395 * additional entries are initialized to true; 396 */ 397 private void ensureTrackVisibilityLength() { 398 final int l = data.getTracks().size(); 399 if (l == layer.trackVisibility.length) 400 return; 401 final int m = Math.min(l, layer.trackVisibility.length); 402 layer.trackVisibility = Arrays.copyOf(layer.trackVisibility, l); 403 for (int i = m; i < l; i++) { 404 layer.trackVisibility[i] = true; 405 } 406 } 407 408 /** 409 * Draw all enabled GPX elements of layer. 410 * @param g the common draw object to use 411 * @param mv the meta data to current displayed area 412 * @param visibleSegments segments visible in the current scope of mv 413 */ 414 public void drawAll(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) { 415 416 final long timeStart = System.currentTimeMillis(); 417 418 checkCache(); 419 420 // STEP 2b - RE-COMPUTE CACHE DATA ********************* 421 if (!computeCacheInSync) { // don't compute if the cache is good 422 calculateColors(); 423 } 424 425 fixColors(visibleSegments); 426 427 // backup the environment 428 Composite oldComposite = g.getComposite(); 429 Stroke oldStroke = g.getStroke(); 430 Paint oldPaint = g.getPaint(); 431 432 // set hints for the render 433 g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, 434 Config.getPref().getBoolean("mappaint.gpx.use-antialiasing", false) ? 435 RenderingHints.VALUE_ANTIALIAS_ON : RenderingHints.VALUE_ANTIALIAS_OFF); 436 437 if (lineWidth != 0) { 438 g.setStroke(new BasicStroke(lineWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND)); 439 } 440 441 // global enabled or select via color 442 boolean useHeatMap = heatMapEnabled || ColorMode.HEATMAP == colored; 443 444 // default global alpha level 445 float layerAlpha = 1.00f; 446 447 // extract current alpha blending value 448 if (oldComposite instanceof AlphaComposite) { 449 layerAlpha = ((AlphaComposite) oldComposite).getAlpha(); 450 } 451 452 // use heatmap background layer 453 if (useHeatMap) { 454 drawHeatMap(g, mv, visibleSegments); 455 } else { 456 // use normal line style or alpha-blending lines 457 if (!alphaLines) { 458 drawLines(g, mv, visibleSegments); 459 } else { 460 drawLinesAlpha(g, mv, visibleSegments, layerAlpha); 461 } 462 } 463 464 // override global alpha settings (smooth overlay) 465 if (alphaLines || useHeatMap) { 466 g.setComposite(AlphaComposite.SrcOver.derive(0.25f * layerAlpha)); 467 } 468 469 // normal overlays 470 drawArrows(g, mv, visibleSegments); 471 drawPoints(g, mv, visibleSegments); 472 473 // restore environment 474 g.setPaint(oldPaint); 475 g.setStroke(oldStroke); 476 g.setComposite(oldComposite); 477 478 // show some debug info 479 if (Logging.isDebugEnabled() && !visibleSegments.isEmpty()) { 480 final long timeDiff = System.currentTimeMillis() - timeStart; 481 482 Logging.debug("gpxdraw::draw takes " + 483 Utils.getDurationString(timeDiff) + 484 "(" + 485 "segments= " + visibleSegments.size() + 486 ", per 10000 = " + Utils.getDurationString(10_000 * timeDiff / visibleSegments.size()) + 487 ")" 488 ); 489 } 490 } 491 492 /** 493 * Calculate colors of way segments based on latest configuration settings 494 */ 495 public void calculateColors() { 496 double minval = +1e10; 497 double maxval = -1e10; 498 WayPoint oldWp = null; 499 500 if (colorModeDynamic) { 501 if (colored == ColorMode.VELOCITY) { 502 final List<Double> velocities = new ArrayList<>(); 503 for (Collection<WayPoint> segment : data.getLinesIterable(null)) { 504 if (!forceLines) { 505 oldWp = null; 506 } 507 for (WayPoint trkPnt : segment) { 508 if (!trkPnt.isLatLonKnown()) { 509 continue; 510 } 511 if (oldWp != null && trkPnt.time > oldWp.time) { 512 double vel = trkPnt.getCoor().greatCircleDistance(oldWp.getCoor()) 513 / (trkPnt.time - oldWp.time); 514 velocities.add(vel); 515 } 516 oldWp = trkPnt; 517 } 518 } 519 Collections.sort(velocities); 520 if (velocities.isEmpty()) { 521 velocityScale.setRange(0, 120/3.6); 522 } else { 523 minval = velocities.get(velocities.size() / 20); // 5% percentile to remove outliers 524 maxval = velocities.get(velocities.size() * 19 / 20); // 95% percentile to remove outliers 525 velocityScale.setRange(minval, maxval); 526 } 527 } else if (colored == ColorMode.HDOP) { 528 for (Collection<WayPoint> segment : data.getLinesIterable(null)) { 529 for (WayPoint trkPnt : segment) { 530 Object val = trkPnt.get(GpxConstants.PT_HDOP); 531 if (val != null) { 532 double hdop = ((Float) val).doubleValue(); 533 if (hdop > maxval) { 534 maxval = hdop; 535 } 536 if (hdop < minval) { 537 minval = hdop; 538 } 539 } 540 } 541 } 542 if (minval >= maxval) { 543 hdopScale.setRange(0, 100); 544 } else { 545 hdopScale.setRange(minval, maxval); 546 } 547 } 548 oldWp = null; 549 } else { // color mode not dynamic 550 velocityScale.setRange(0, colorTracksTune); 551 hdopScale.setRange(0, hdoprange); 552 } 553 double now = System.currentTimeMillis()/1000.0; 554 if (colored == ColorMode.TIME) { 555 Date[] bounds = data.getMinMaxTimeForAllTracks(); 556 if (bounds.length >= 2) { 557 minval = bounds[0].getTime()/1000.0; 558 maxval = bounds[1].getTime()/1000.0; 559 } else { 560 minval = 0; 561 maxval = now; 562 } 563 dateScale.setRange(minval, maxval); 564 } 565 566 // Now the colors for all the points will be assigned 567 for (Collection<WayPoint> segment : data.getLinesIterable(null)) { 568 if (!forceLines) { // don't draw lines between segments, unless forced to 569 oldWp = null; 570 } 571 for (WayPoint trkPnt : segment) { 572 LatLon c = trkPnt.getCoor(); 573 trkPnt.customColoring = neutralColor; 574 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) { 575 continue; 576 } 577 // now we are sure some color will be assigned 578 Color color = null; 579 580 if (colored == ColorMode.HDOP) { 581 Float hdop = (Float) trkPnt.get(GpxConstants.PT_HDOP); 582 color = hdopScale.getColor(hdop); 583 } 584 if (oldWp != null) { // other coloring modes need segment for calcuation 585 double dist = c.greatCircleDistance(oldWp.getCoor()); 586 boolean noDraw = false; 587 switch (colored) { 588 case VELOCITY: 589 double dtime = trkPnt.time - oldWp.time; 590 if (dtime > 0) { 591 color = velocityScale.getColor(dist / dtime); 592 } else { 593 color = velocityScale.getNoDataColor(); 594 } 595 break; 596 case DIRECTION: 597 double dirColor = oldWp.getCoor().bearing(trkPnt.getCoor()); 598 color = directionScale.getColor(dirColor); 599 break; 600 case TIME: 601 double t = trkPnt.time; 602 // skip bad timestamps and very short tracks 603 if (t > 0 && t <= now && maxval - minval > minTrackDurationForTimeColoring) { 604 color = dateScale.getColor(t); 605 } else { 606 color = dateScale.getNoDataColor(); 607 } 608 break; 609 default: // Do nothing 610 } 611 if (!noDraw && (maxLineLength == -1 || dist <= maxLineLength)) { 612 trkPnt.drawLine = true; 613 double bearing = oldWp.getCoor().bearing(trkPnt.getCoor()); 614 trkPnt.dir = ((int) (bearing / Math.PI * 4 + 1.5)) % 8; 615 } else { 616 trkPnt.drawLine = false; 617 } 618 } else { // make sure we reset outdated data 619 trkPnt.drawLine = false; 620 color = neutralColor; 621 } 622 if (color != null) { 623 trkPnt.customColoring = color; 624 } 625 oldWp = trkPnt; 626 } 627 } 628 629 // heat mode 630 if (ColorMode.HEATMAP == colored) { 631 632 // get new user color map and refresh visibility level 633 heatMapLutColor = createColorLut(heatMapDrawLowerLimit, 634 selectColorMap(neutralColor != null ? neutralColor : Color.WHITE, heatMapDrawColorTableIdx)); 635 636 // force redraw of image 637 heatMapMapViewState = null; 638 } 639 640 computeCacheInSync = true; 641 } 642 643 /** 644 * Draw all GPX ways segments 645 * @param g the common draw object to use 646 * @param mv the meta data to current displayed area 647 * @param visibleSegments segments visible in the current scope of mv 648 */ 649 private void drawLines(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) { 650 if (lines) { 651 Point old = null; 652 for (WayPoint trkPnt : visibleSegments) { 653 if (!trkPnt.isLatLonKnown()) { 654 old = null; 655 continue; 656 } 657 Point screen = mv.getPoint(trkPnt); 658 // skip points that are on the same screenposition 659 if (trkPnt.drawLine && old != null && ((old.x != screen.x) || (old.y != screen.y))) { 660 g.setColor(trkPnt.customColoring); 661 g.drawLine(old.x, old.y, screen.x, screen.y); 662 } 663 old = screen; 664 } 665 } 666 } 667 668 /** 669 * Draw all GPX arrays 670 * @param g the common draw object to use 671 * @param mv the meta data to current displayed area 672 * @param visibleSegments segments visible in the current scope of mv 673 */ 674 private void drawArrows(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) { 675 /**************************************************************** 676 ********** STEP 3b - DRAW NICE ARROWS ************************** 677 ****************************************************************/ 678 if (lines && direction && !alternateDirection) { 679 Point old = null; 680 Point oldA = null; // last arrow painted 681 for (WayPoint trkPnt : visibleSegments) { 682 if (!trkPnt.isLatLonKnown()) { 683 old = null; 684 continue; 685 } 686 if (trkPnt.drawLine) { 687 Point screen = mv.getPoint(trkPnt); 688 // skip points that are on the same screenposition 689 if (old != null 690 && (oldA == null || screen.x < oldA.x - delta || screen.x > oldA.x + delta 691 || screen.y < oldA.y - delta || screen.y > oldA.y + delta)) { 692 g.setColor(trkPnt.customColoring); 693 double t = Math.atan2((double) screen.y - old.y, (double) screen.x - old.x) + Math.PI; 694 g.drawLine(screen.x, screen.y, (int) (screen.x + 10 * Math.cos(t - PHI)), 695 (int) (screen.y + 10 * Math.sin(t - PHI))); 696 g.drawLine(screen.x, screen.y, (int) (screen.x + 10 * Math.cos(t + PHI)), 697 (int) (screen.y + 10 * Math.sin(t + PHI))); 698 oldA = screen; 699 } 700 old = screen; 701 } 702 } // end for trkpnt 703 } 704 705 /**************************************************************** 706 ********** STEP 3c - DRAW FAST ARROWS ************************** 707 ****************************************************************/ 708 if (lines && direction && alternateDirection) { 709 Point old = null; 710 Point oldA = null; // last arrow painted 711 for (WayPoint trkPnt : visibleSegments) { 712 LatLon c = trkPnt.getCoor(); 713 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) { 714 continue; 715 } 716 if (trkPnt.drawLine) { 717 Point screen = mv.getPoint(trkPnt); 718 // skip points that are on the same screenposition 719 if (old != null 720 && (oldA == null || screen.x < oldA.x - delta || screen.x > oldA.x + delta 721 || screen.y < oldA.y - delta || screen.y > oldA.y + delta)) { 722 g.setColor(trkPnt.customColoring); 723 g.drawLine(screen.x, screen.y, screen.x + dir[trkPnt.dir][0], screen.y 724 + dir[trkPnt.dir][1]); 725 g.drawLine(screen.x, screen.y, screen.x + dir[trkPnt.dir][2], screen.y 726 + dir[trkPnt.dir][3]); 727 oldA = screen; 728 } 729 old = screen; 730 } 731 } // end for trkpnt 732 } 733 } 734 735 /** 736 * Draw all GPX points 737 * @param g the common draw object to use 738 * @param mv the meta data to current displayed area 739 * @param visibleSegments segments visible in the current scope of mv 740 */ 741 private void drawPoints(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) { 742 /**************************************************************** 743 ********** STEP 3d - DRAW LARGE POINTS AND HDOP CIRCLE ********* 744 ****************************************************************/ 745 if (large || hdopCircle) { 746 final int halfSize = largesize/2; 747 for (WayPoint trkPnt : visibleSegments) { 748 LatLon c = trkPnt.getCoor(); 749 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) { 750 continue; 751 } 752 Point screen = mv.getPoint(trkPnt); 753 754 if (hdopCircle && trkPnt.get(GpxConstants.PT_HDOP) != null) { 755 // hdop value 756 float hdop = (Float) trkPnt.get(GpxConstants.PT_HDOP); 757 if (hdop < 0) { 758 hdop = 0; 759 } 760 Color customColoringTransparent = hdopAlpha < 0 ? trkPnt.customColoring : 761 new Color((trkPnt.customColoring.getRGB() & 0x00ffffff) | (hdopAlpha << 24), true); 762 g.setColor(customColoringTransparent); 763 // hdop circles 764 int hdopp = mv.getPoint(new LatLon( 765 trkPnt.getCoor().lat(), 766 trkPnt.getCoor().lon() + 2d*6*hdop*360/40000000d)).x - screen.x; 767 g.drawArc(screen.x-hdopp/2, screen.y-hdopp/2, hdopp, hdopp, 0, 360); 768 } 769 if (large) { 770 // color the large GPS points like the gps lines 771 if (trkPnt.customColoring != null) { 772 Color customColoringTransparent = largePointAlpha < 0 ? trkPnt.customColoring : 773 new Color((trkPnt.customColoring.getRGB() & 0x00ffffff) | (largePointAlpha << 24), true); 774 775 g.setColor(customColoringTransparent); 776 } 777 g.fillRect(screen.x-halfSize, screen.y-halfSize, largesize, largesize); 778 } 779 } // end for trkpnt 780 } // end if large || hdopcircle 781 782 /**************************************************************** 783 ********** STEP 3e - DRAW SMALL POINTS FOR LINES *************** 784 ****************************************************************/ 785 if (!large && lines) { 786 g.setColor(neutralColor); 787 for (WayPoint trkPnt : visibleSegments) { 788 LatLon c = trkPnt.getCoor(); 789 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) { 790 continue; 791 } 792 if (!trkPnt.drawLine) { 793 Point screen = mv.getPoint(trkPnt); 794 g.drawRect(screen.x, screen.y, 0, 0); 795 } 796 } // end for trkpnt 797 } // end if large 798 799 /**************************************************************** 800 ********** STEP 3f - DRAW SMALL POINTS INSTEAD OF LINES ******** 801 ****************************************************************/ 802 if (!large && !lines) { 803 g.setColor(neutralColor); 804 for (WayPoint trkPnt : visibleSegments) { 805 LatLon c = trkPnt.getCoor(); 806 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) { 807 continue; 808 } 809 Point screen = mv.getPoint(trkPnt); 810 g.setColor(trkPnt.customColoring); 811 g.drawRect(screen.x, screen.y, 0, 0); 812 } // end for trkpnt 813 } // end if large 814 } 815 816 /** 817 * Draw GPX lines by using alpha blending 818 * @param g the common draw object to use 819 * @param mv the meta data to current displayed area 820 * @param visibleSegments segments visible in the current scope of mv 821 * @param layerAlpha the color alpha value set for that operation 822 */ 823 private void drawLinesAlpha(Graphics2D g, MapView mv, List<WayPoint> visibleSegments, float layerAlpha) { 824 825 // 1st. backup the paint environment ---------------------------------- 826 Composite oldComposite = g.getComposite(); 827 Stroke oldStroke = g.getStroke(); 828 Paint oldPaint = g.getPaint(); 829 830 // 2nd. determine current scale factors ------------------------------- 831 832 // adjust global settings 833 final int globalLineWidth = Utils.clamp(lineWidth, 1, 20); 834 835 // cache scale of view 836 final double zoomScale = mv.getDist100Pixel() / 50.0f; 837 838 // 3rd. determine current paint parameters ----------------------------- 839 840 // alpha value is based on zoom and line with combined with global layer alpha 841 float theLineAlpha = (float) Utils.clamp((0.50 / zoomScale) / (globalLineWidth + 1), 0.01, 0.50) * layerAlpha; 842 final int theLineWith = (int) (lineWidth / zoomScale) + 1; 843 844 // 4th setup virtual paint area ---------------------------------------- 845 846 // set line format and alpha channel for all overlays (more lines -> few overlap -> more transparency) 847 g.setStroke(new BasicStroke(theLineWith, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND)); 848 g.setComposite(AlphaComposite.SrcOver.derive(theLineAlpha)); 849 850 // last used / calculated entries 851 Point lastPaintPnt = null; 852 853 // 5th draw the layer --------------------------------------------------- 854 855 // for all points 856 for (WayPoint trkPnt : visibleSegments) { 857 858 // transform coordinates 859 final Point paintPnt = mv.getPoint(trkPnt); 860 861 // skip single points 862 if (lastPaintPnt != null && trkPnt.drawLine && !lastPaintPnt.equals(paintPnt)) { 863 864 // set different color 865 g.setColor(trkPnt.customColoring); 866 867 // draw it 868 g.drawLine(lastPaintPnt.x, lastPaintPnt.y, paintPnt.x, paintPnt.y); 869 } 870 871 lastPaintPnt = paintPnt; 872 } 873 874 // @last restore modified paint environment ----------------------------- 875 g.setPaint(oldPaint); 876 g.setStroke(oldStroke); 877 g.setComposite(oldComposite); 878 } 879 880 /** 881 * Generates a linear gradient map image 882 * 883 * @param width image width 884 * @param height image height 885 * @param colors 1..n color descriptions 886 * @return image object 887 */ 888 protected static BufferedImage createImageGradientMap(int width, int height, Color... colors) { 889 890 // create image an paint object 891 final BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); 892 final Graphics2D g = img.createGraphics(); 893 894 float[] fract = new float[ colors.length ]; 895 896 // distribute fractions (define position of color in map) 897 for (int i = 0; i < colors.length; ++i) { 898 fract[i] = i * (1.0f / colors.length); 899 } 900 901 // draw the gradient map 902 LinearGradientPaint gradient = new LinearGradientPaint(0, 0, width, height, fract, colors, 903 MultipleGradientPaint.CycleMethod.NO_CYCLE); 904 g.setPaint(gradient); 905 g.fillRect(0, 0, width, height); 906 g.dispose(); 907 908 // access it via raw interface 909 return img; 910 } 911 912 /** 913 * Creates a distributed colormap by linear blending between colors 914 * @param lowerLimit lower limit for first visible color 915 * @param colors 1..n colors 916 * @return array of Color objects 917 */ 918 protected static Color[] createColorLut(int lowerLimit, Color... colors) { 919 920 // number of lookup entries 921 final int tableSize = 256; 922 923 // access it via raw interface 924 final Raster imgRaster = createImageGradientMap(tableSize, 1, colors).getData(); 925 926 // the pixel storage 927 int[] pixel = new int[1]; 928 929 Color[] colorTable = new Color[tableSize]; 930 931 // map the range 0..255 to 0..pi/2 932 final double mapTo90Deg = Math.PI / 2.0 / 255.0; 933 934 // create the lookup table 935 for (int i = 0; i < tableSize; i++) { 936 937 // get next single pixel 938 imgRaster.getDataElements(i, 0, pixel); 939 940 // get color and map 941 Color c = new Color(pixel[0]); 942 943 // smooth alpha like sin curve 944 int alpha = (i > lowerLimit) ? (int) (Math.sin((i-lowerLimit) * mapTo90Deg) * 255) : 0; 945 946 // alpha with pre-offset, first color -> full transparent 947 alpha = alpha > 0 ? (20 + alpha) : 0; 948 949 // shrink to maximum bound 950 if (alpha > 255) { 951 alpha = 255; 952 } 953 954 // increase transparency for higher values ( avoid big saturation ) 955 if (i > 240 && 255 == alpha) { 956 alpha -= (i - 240); 957 } 958 959 // fill entry in table, assign a alpha value 960 colorTable[i] = new Color(c.getRed(), c.getGreen(), c.getBlue(), alpha); 961 } 962 963 // transform into lookup table 964 return colorTable; 965 } 966 967 /** 968 * Creates a darker color 969 * @param in Color object 970 * @param adjust darker adjustment amount 971 * @return new Color 972 */ 973 protected static Color darkerColor(Color in, float adjust) { 974 975 final float r = (float) in.getRed()/255; 976 final float g = (float) in.getGreen()/255; 977 final float b = (float) in.getBlue()/255; 978 979 return new Color(r*adjust, g*adjust, b*adjust); 980 } 981 982 /** 983 * Creates a colormap by using a static color map with 1..n colors (RGB 0.0 ..1.0) 984 * @param str the filename (without extension) to look for into data/gpx 985 * @return the parsed colormap 986 */ 987 protected static Color[] createColorFromResource(String str) { 988 989 // create resource string 990 final String colorFile = "resource://data/gpx/" + str + ".txt"; 991 992 List<Color> colorList = new ArrayList<>(); 993 994 // try to load the file 995 try (CachedFile cf = new CachedFile(colorFile); BufferedReader br = cf.getContentReader()) { 996 997 String line; 998 999 // process lines 1000 while ((line = br.readLine()) != null) { 1001 1002 // use comma as separator 1003 String[] column = line.split(","); 1004 1005 // empty or comment line 1006 if (column.length < 3 || column[0].startsWith("#")) { 1007 continue; 1008 } 1009 1010 // extract RGB value 1011 float r = Float.parseFloat(column[0]); 1012 float g = Float.parseFloat(column[1]); 1013 float b = Float.parseFloat(column[2]); 1014 1015 // some color tables are 0..1.0 and some 0.255 1016 float scale = (r < 1 && g < 1 && b < 1) ? 1 : 255; 1017 1018 colorList.add(new Color(r/scale, g/scale, b/scale)); 1019 } 1020 } catch (IOException e) { 1021 throw new JosmRuntimeException(e); 1022 } 1023 1024 // fallback if empty or failed 1025 if (colorList.isEmpty()) { 1026 colorList.add(Color.BLACK); 1027 colorList.add(Color.WHITE); 1028 } else { 1029 // add additional darker elements to end of list 1030 final Color lastColor = colorList.get(colorList.size() - 1); 1031 colorList.add(darkerColor(lastColor, 0.975f)); 1032 colorList.add(darkerColor(lastColor, 0.950f)); 1033 } 1034 1035 return createColorLut(0, colorList.toArray(new Color[0])); 1036 } 1037 1038 /** 1039 * Returns the next user color map 1040 * 1041 * @param userColor - default or fallback user color 1042 * @param tableIdx - selected user color index 1043 * @return color array 1044 */ 1045 protected static Color[] selectColorMap(Color userColor, int tableIdx) { 1046 1047 // generate new user color map ( dark, user color, white ) 1048 Color[] userColor1 = createColorLut(0, userColor.darker(), userColor, userColor.brighter(), Color.WHITE); 1049 1050 // generate new user color map ( white -> color ) 1051 Color[] userColor2 = createColorLut(0, Color.WHITE, Color.WHITE, userColor); 1052 1053 // generate new user color map 1054 Color[] colorTrafficLights = createColorLut(0, Color.WHITE, Color.GREEN.darker(), Color.YELLOW, Color.RED); 1055 1056 // decide what, keep order is sync with setting on GUI 1057 Color[][] lut = { 1058 userColor1, 1059 userColor2, 1060 colorTrafficLights, 1061 heatMapLutColorJosmInferno, 1062 heatMapLutColorJosmViridis, 1063 heatMapLutColorJosmBrown2Green, 1064 heatMapLutColorJosmRed2Blue 1065 }; 1066 1067 // default case 1068 Color[] nextUserColor = userColor1; 1069 1070 // select by index 1071 if (tableIdx < lut.length) { 1072 nextUserColor = lut[ tableIdx ]; 1073 } 1074 1075 // adjust color map 1076 return nextUserColor; 1077 } 1078 1079 /** 1080 * Generates a Icon 1081 * 1082 * @param userColor selected user color 1083 * @param tableIdx tabled index 1084 * @param size size of the image 1085 * @return a image icon that shows the 1086 */ 1087 public static ImageIcon getColorMapImageIcon(Color userColor, int tableIdx, int size) { 1088 return new ImageIcon(createImageGradientMap(size, size, selectColorMap(userColor, tableIdx))); 1089 } 1090 1091 /** 1092 * Draw gray heat map with current Graphics2D setting 1093 * @param gB the common draw object to use 1094 * @param mv the meta data to current displayed area 1095 * @param listSegm segments visible in the current scope of mv 1096 * @param foreComp composite use to draw foreground objects 1097 * @param foreStroke stroke use to draw foreground objects 1098 * @param backComp composite use to draw background objects 1099 * @param backStroke stroke use to draw background objects 1100 */ 1101 private void drawHeatGrayLineMap(Graphics2D gB, MapView mv, List<WayPoint> listSegm, 1102 Composite foreComp, Stroke foreStroke, 1103 Composite backComp, Stroke backStroke) { 1104 1105 // draw foreground 1106 boolean drawForeground = foreComp != null && foreStroke != null; 1107 1108 // set initial values 1109 gB.setStroke(backStroke); gB.setComposite(backComp); 1110 1111 // get last point in list 1112 final WayPoint lastPnt = !listSegm.isEmpty() ? listSegm.get(listSegm.size() - 1) : null; 1113 1114 // for all points, draw single lines by using optimized drawing 1115 for (WayPoint trkPnt : listSegm) { 1116 1117 // get transformed coordinates 1118 final Point paintPnt = mv.getPoint(trkPnt); 1119 1120 // end of line segment or end of list reached 1121 if (!trkPnt.drawLine || (lastPnt == trkPnt)) { 1122 1123 // convert to primitive type 1124 final int[] polyXArr = heatMapPolyX.stream().mapToInt(Integer::intValue).toArray(); 1125 final int[] polyYArr = heatMapPolyY.stream().mapToInt(Integer::intValue).toArray(); 1126 1127 // a.) draw background 1128 gB.drawPolyline(polyXArr, polyYArr, polyXArr.length); 1129 1130 // b.) draw extra foreground 1131 if (drawForeground && heatMapDrawExtraLine) { 1132 1133 gB.setStroke(foreStroke); gB.setComposite(foreComp); 1134 gB.drawPolyline(polyXArr, polyYArr, polyXArr.length); 1135 gB.setStroke(backStroke); gB.setComposite(backComp); 1136 } 1137 1138 // drop used points 1139 heatMapPolyX.clear(); heatMapPolyY.clear(); 1140 } 1141 1142 // store only the integer part (make sense because pixel is 1:1 here) 1143 heatMapPolyX.add((int) paintPnt.getX()); 1144 heatMapPolyY.add((int) paintPnt.getY()); 1145 } 1146 } 1147 1148 /** 1149 * Map the gray map to heat map and draw them with current Graphics2D setting 1150 * @param g the common draw object to use 1151 * @param imgGray gray scale input image 1152 * @param sampleRaster the line with for drawing 1153 * @param outlineWidth line width for outlines 1154 */ 1155 private void drawHeatMapGrayMap(Graphics2D g, BufferedImage imgGray, int sampleRaster, int outlineWidth) { 1156 1157 final int[] imgPixels = ((DataBufferInt) imgGray.getRaster().getDataBuffer()).getData(); 1158 1159 // samples offset and bounds are scaled with line width derived from zoom level 1160 final int offX = Math.max(1, sampleRaster); 1161 final int offY = Math.max(1, sampleRaster); 1162 1163 final int maxPixelX = imgGray.getWidth(); 1164 final int maxPixelY = imgGray.getHeight(); 1165 1166 // always full or outlines at big samples rasters 1167 final boolean drawOutlines = (outlineWidth > 0) && ((0 == sampleRaster) || (sampleRaster > 10)); 1168 1169 // backup stroke 1170 final Stroke oldStroke = g.getStroke(); 1171 1172 // use basic stroke for outlines and default transparency 1173 g.setStroke(new BasicStroke(outlineWidth)); 1174 1175 int lastPixelX = 0; 1176 int lastPixelColor = 0; 1177 1178 // resample gray scale image with line linear weight of next sample in line 1179 // process each line and draw pixels / rectangles with same color with one operations 1180 for (int y = 0; y < maxPixelY; y += offY) { 1181 1182 // the lines offsets 1183 final int lastLineOffset = maxPixelX * (y+0); 1184 final int nextLineOffset = maxPixelX * (y+1); 1185 1186 for (int x = 0; x < maxPixelX; x += offX) { 1187 1188 int thePixelColor = 0; int thePixelCount = 0; 1189 1190 // sample the image (it is gray scale) 1191 int offset = lastLineOffset + x; 1192 1193 // merge next pixels of window of line 1194 for (int k = 0; k < offX && (offset + k) < nextLineOffset; k++) { 1195 thePixelColor += imgPixels[offset+k] & 0xFF; 1196 thePixelCount++; 1197 } 1198 1199 // mean value 1200 thePixelColor = thePixelCount > 0 ? (thePixelColor / thePixelCount) : 0; 1201 1202 // restart -> use initial sample 1203 if (0 == x) { 1204 lastPixelX = 0; lastPixelColor = thePixelColor - 1; 1205 } 1206 1207 boolean bDrawIt = false; 1208 1209 // when one of segment is mapped to black 1210 bDrawIt = bDrawIt || (lastPixelColor == 0) || (thePixelColor == 0); 1211 1212 // different color 1213 bDrawIt = bDrawIt || (Math.abs(lastPixelColor-thePixelColor) > 0); 1214 1215 // when line is finished draw always 1216 bDrawIt = bDrawIt || (y >= (maxPixelY-offY)); 1217 1218 if (bDrawIt) { 1219 1220 // draw only foreground pixels 1221 if (lastPixelColor > 0) { 1222 1223 // gray to RGB mapping 1224 g.setColor(heatMapLutColor[ lastPixelColor ]); 1225 1226 // box from from last Y pixel to current pixel 1227 if (drawOutlines) { 1228 g.drawRect(lastPixelX, y, offX + x - lastPixelX, offY); 1229 } else { 1230 g.fillRect(lastPixelX, y, offX + x - lastPixelX, offY); 1231 } 1232 } 1233 1234 // restart detection 1235 lastPixelX = x; lastPixelColor = thePixelColor; 1236 } 1237 } 1238 } 1239 1240 // recover 1241 g.setStroke(oldStroke); 1242 } 1243 1244 /** 1245 * Collect and draw GPS segments and displays a heat-map 1246 * @param g the common draw object to use 1247 * @param mv the meta data to current displayed area 1248 * @param visibleSegments segments visible in the current scope of mv 1249 */ 1250 private void drawHeatMap(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) { 1251 1252 // get bounds of screen image and projection, zoom and adjust input parameters 1253 final Rectangle screenBounds = new Rectangle(mv.getWidth(), mv.getHeight()); 1254 final MapViewState mapViewState = mv.getState(); 1255 final double zoomScale = mv.getDist100Pixel() / 50.0f; 1256 1257 // adjust global settings ( zero = default line width ) 1258 final int globalLineWidth = (0 == lineWidth) ? 1 : Utils.clamp(lineWidth, 1, 20); 1259 1260 // 1st setup virtual paint area ---------------------------------------- 1261 1262 // new image buffer needed 1263 final boolean imageSetup = null == heatMapImgGray || !heatMapCacheScreenBounds.equals(screenBounds); 1264 1265 // screen bounds changed, need new image buffer ? 1266 if (imageSetup) { 1267 // we would use a "pure" grayscale image, but there is not efficient way to map gray scale values to RGB) 1268 heatMapImgGray = new BufferedImage(screenBounds.width, screenBounds.height, BufferedImage.TYPE_INT_ARGB); 1269 heatMapGraph2d = heatMapImgGray.createGraphics(); 1270 heatMapGraph2d.setBackground(new Color(0, 0, 0, 255)); 1271 heatMapGraph2d.setColor(Color.WHITE); 1272 1273 // fast draw ( maybe help or not ) 1274 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF); 1275 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED); 1276 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_SPEED); 1277 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_DISABLE); 1278 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR); 1279 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE); 1280 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_SPEED); 1281 1282 // cache it 1283 heatMapCacheScreenBounds = screenBounds; 1284 } 1285 1286 // 2nd. determine current scale factors ------------------------------- 1287 1288 // the line width (foreground: draw extra small footprint line of track) 1289 int lineWidthB = (int) Math.max(1.5f * (globalLineWidth / zoomScale) + 1, 2); 1290 int lineWidthF = lineWidthB > 2 ? (globalLineWidth - 1) : 0; 1291 1292 // global alpha adjustment 1293 float lineAlpha = (float) Utils.clamp((0.40 / zoomScale) / (globalLineWidth + 1), 0.01, 0.40); 1294 1295 // adjust 0.15 .. 1.85 1296 float scaleAlpha = 1.0f + ((heatMapDrawGain/10.0f) * 0.85f); 1297 1298 // add to calculated values 1299 float lineAlphaBPoint = (float) Utils.clamp((lineAlpha * 0.65) * scaleAlpha, 0.001, 0.90); 1300 float lineAlphaBLine = (float) Utils.clamp((lineAlpha * 1.00) * scaleAlpha, 0.001, 0.90); 1301 float lineAlphaFLine = (float) Utils.clamp((lineAlpha / 1.50) * scaleAlpha, 0.001, 0.90); 1302 1303 // 3rd Calculate the heat map data by draw GPX traces with alpha value ---------- 1304 1305 // recalculation of image needed 1306 final boolean imageRecalc = !mapViewState.equalsInWindow(heatMapMapViewState) 1307 || gpxLayerInvalidated 1308 || heatMapCacheLineWith != globalLineWidth; 1309 1310 // need re-generation of gray image ? 1311 if (imageSetup || imageRecalc) { 1312 1313 // clear background 1314 heatMapGraph2d.clearRect(0, 0, heatMapImgGray.getWidth(), heatMapImgGray.getHeight()); 1315 1316 // point or line blending 1317 if (heatMapDrawPointMode) { 1318 heatMapGraph2d.setComposite(AlphaComposite.SrcOver.derive(lineAlphaBPoint)); 1319 drawHeatGrayDotMap(heatMapGraph2d, mv, visibleSegments, lineWidthB); 1320 1321 } else { 1322 drawHeatGrayLineMap(heatMapGraph2d, mv, visibleSegments, 1323 lineWidthF > 1 ? AlphaComposite.SrcOver.derive(lineAlphaFLine) : null, 1324 new BasicStroke(lineWidthF, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND), 1325 AlphaComposite.SrcOver.derive(lineAlphaBLine), 1326 new BasicStroke(lineWidthB, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND)); 1327 } 1328 1329 // remember draw parameter 1330 heatMapMapViewState = mapViewState; 1331 heatMapCacheLineWith = globalLineWidth; 1332 gpxLayerInvalidated = false; 1333 } 1334 1335 // 4th. Draw data on target layer, map data via color lookup table -------------- 1336 drawHeatMapGrayMap(g, heatMapImgGray, lineWidthB > 2 ? (int) (lineWidthB*1.25f) : 1, lineWidth > 2 ? (lineWidth - 2) : 1); 1337 } 1338 1339 /** 1340 * Draw a dotted heat map 1341 * 1342 * @param gB the common draw object to use 1343 * @param mv the meta data to current displayed area 1344 * @param listSegm segments visible in the current scope of mv 1345 * @param drawSize draw size of draw element 1346 */ 1347 private static void drawHeatGrayDotMap(Graphics2D gB, MapView mv, List<WayPoint> listSegm, int drawSize) { 1348 1349 // typical rendering rate -> use realtime preview instead of accurate display 1350 final double maxSegm = 25_000, nrSegms = listSegm.size(); 1351 1352 // determine random drop rate 1353 final double randomDrop = Math.min(nrSegms > maxSegm ? (nrSegms - maxSegm) / nrSegms : 0, 0.70f); 1354 1355 // http://www.nstb.tc.faa.gov/reports/PAN94_0716.pdf#page=22 1356 // Global Average Position Domain Accuracy, typical -> not worst case ! 1357 // < 4.218 m Vertical 1358 // < 2.168 m Horizontal 1359 final double pixelRmsX = (100 / mv.getDist100Pixel()) * 2.168; 1360 final double pixelRmsY = (100 / mv.getDist100Pixel()) * 4.218; 1361 1362 Point lastPnt = null; 1363 1364 // for all points, draw single lines 1365 for (WayPoint trkPnt : listSegm) { 1366 1367 // get transformed coordinates 1368 final Point paintPnt = mv.getPoint(trkPnt); 1369 1370 // end of line segment or end of list reached 1371 if (trkPnt.drawLine && null != lastPnt) { 1372 drawHeatSurfaceLine(gB, paintPnt, lastPnt, drawSize, pixelRmsX, pixelRmsY, randomDrop); 1373 } 1374 1375 // remember 1376 lastPnt = paintPnt; 1377 } 1378 } 1379 1380 /** 1381 * Draw a dotted surface line 1382 * 1383 * @param g the common draw object to use 1384 * @param fromPnt start point 1385 * @param toPnt end point 1386 * @param drawSize size of draw elements 1387 * @param rmsSizeX RMS size of circle for X (width) 1388 * @param rmsSizeY RMS size of circle for Y (height) 1389 * @param dropRate Pixel render drop rate 1390 */ 1391 private static void drawHeatSurfaceLine(Graphics2D g, 1392 Point fromPnt, Point toPnt, int drawSize, double rmsSizeX, double rmsSizeY, double dropRate) { 1393 1394 // collect frequently used items 1395 final int fromX = (int) fromPnt.getX(); final int deltaX = (int) (toPnt.getX() - fromX); 1396 final int fromY = (int) fromPnt.getY(); final int deltaY = (int) (toPnt.getY() - fromY); 1397 1398 // use same random values for each point 1399 final Random heatMapRandom = new Random(fromX+fromY+deltaX+deltaY); 1400 1401 // cache distance between start and end point 1402 final int dist = (int) Math.abs(fromPnt.distance(toPnt)); 1403 1404 // number of increment ( fill wide distance tracks ) 1405 double scaleStep = Math.max(1.0f / dist, dist > 100 ? 0.10f : 0.20f); 1406 1407 // number of additional random points 1408 int rounds = Math.min(drawSize/2, 1)+1; 1409 1410 // decrease random noise at high drop rate ( more accurate draw of fewer points ) 1411 rmsSizeX *= (1.0d - dropRate); 1412 rmsSizeY *= (1.0d - dropRate); 1413 1414 double scaleVal = 0; 1415 1416 // interpolate line draw ( needs separate point instead of line ) 1417 while (scaleVal < (1.0d-0.0001d)) { 1418 1419 // get position 1420 final double pntX = fromX + scaleVal * deltaX; 1421 final double pntY = fromY + scaleVal * deltaY; 1422 1423 // add random distribution around sampled point 1424 for (int k = 0; k < rounds; k++) { 1425 1426 // add error distribution, first point with less error 1427 int x = (int) (pntX + heatMapRandom.nextGaussian() * (k > 0 ? rmsSizeX : rmsSizeX/4)); 1428 int y = (int) (pntY + heatMapRandom.nextGaussian() * (k > 0 ? rmsSizeY : rmsSizeY/4)); 1429 1430 // draw it, even drop is requested 1431 if (heatMapRandom.nextDouble() >= dropRate) { 1432 g.fillRect(x-drawSize, y-drawSize, drawSize, drawSize); 1433 } 1434 } 1435 scaleVal += scaleStep; 1436 } 1437 } 1438 1439 /** 1440 * Apply default color configuration to way segments 1441 * @param visibleSegments segments visible in the current scope of mv 1442 */ 1443 private void fixColors(List<WayPoint> visibleSegments) { 1444 for (WayPoint trkPnt : visibleSegments) { 1445 if (trkPnt.customColoring == null) { 1446 trkPnt.customColoring = neutralColor; 1447 } 1448 } 1449 } 1450 1451 /** 1452 * Check cache validity set necessary flags 1453 */ 1454 private void checkCache() { 1455 // CHECKSTYLE.OFF: BooleanExpressionComplexity 1456 if ((computeCacheMaxLineLengthUsed != maxLineLength) 1457 || (computeCacheColored != colored) 1458 || (computeCacheColorTracksTune != colorTracksTune) 1459 || (computeCacheColorDynamic != colorModeDynamic) 1460 || (computeCacheHeatMapDrawColorTableIdx != heatMapDrawColorTableIdx) 1461 || (!neutralColor.equals(computeCacheColorUsed) 1462 || (computeCacheHeatMapDrawPointMode != heatMapDrawPointMode) 1463 || (computeCacheHeatMapDrawGain != heatMapDrawGain)) 1464 || (computeCacheHeatMapDrawLowerLimit != heatMapDrawLowerLimit) 1465 ) { 1466 // CHECKSTYLE.ON: BooleanExpressionComplexity 1467 computeCacheMaxLineLengthUsed = maxLineLength; 1468 computeCacheInSync = false; 1469 computeCacheColorUsed = neutralColor; 1470 computeCacheColored = colored; 1471 computeCacheColorTracksTune = colorTracksTune; 1472 computeCacheColorDynamic = colorModeDynamic; 1473 computeCacheHeatMapDrawColorTableIdx = heatMapDrawColorTableIdx; 1474 computeCacheHeatMapDrawPointMode = heatMapDrawPointMode; 1475 computeCacheHeatMapDrawGain = heatMapDrawGain; 1476 computeCacheHeatMapDrawLowerLimit = heatMapDrawLowerLimit; 1477 } 1478 } 1479 1480 /** 1481 * callback when data is changed, invalidate cached configuration parameters 1482 */ 1483 @Override 1484 public void gpxDataChanged(GpxDataChangeEvent e) { 1485 computeCacheInSync = false; 1486 } 1487 1488 /** 1489 * Draw all GPX arrays 1490 * @param g the common draw object to use 1491 * @param mv the meta data to current displayed area 1492 */ 1493 public void drawColorBar(Graphics2D g, MapView mv) { 1494 int w = mv.getWidth(); 1495 1496 // set do default 1497 g.setComposite(AlphaComposite.SrcOver.derive(1.00f)); 1498 1499 if (colored == ColorMode.HDOP) { 1500 hdopScale.drawColorBar(g, w-30, 50, 20, 100, 1.0); 1501 } else if (colored == ColorMode.VELOCITY) { 1502 SystemOfMeasurement som = SystemOfMeasurement.getSystemOfMeasurement(); 1503 velocityScale.drawColorBar(g, w-30, 50, 20, 100, som.speedValue); 1504 } else if (colored == ColorMode.DIRECTION) { 1505 directionScale.drawColorBar(g, w-30, 50, 20, 100, 180.0/Math.PI); 1506 } 1507 } 1508 1509 @Override 1510 public void paintableInvalidated(PaintableInvalidationEvent event) { 1511 gpxLayerInvalidated = true; 1512 } 1513 1514 @Override 1515 public void detachFromMapView(MapViewEvent event) { 1516 SystemOfMeasurement.removeSoMChangeListener(this); 1517 layer.removeInvalidationListener(this); 1518 data.removeChangeListener(this); 1519 } 1520}