source: josm/trunk/src/org/openstreetmap/josm/gui/layer/gpx/GpxDrawHelper.java@ 15755

Last change on this file since 15755 was 15755, checked in by simon04, 5 years ago

Introduce Stopwatch class to measure elapsed time
  • Property svn:eol-style set to native
File size: 60.9 KB
Line 
1// License: GPL. For details, see LICENSE file.
2package org.openstreetmap.josm.gui.layer.gpx;
3
4import static org.openstreetmap.josm.tools.I18n.marktr;
5import static org.openstreetmap.josm.tools.I18n.tr;
6
7import java.awt.AlphaComposite;
8import java.awt.BasicStroke;
9import java.awt.Color;
10import java.awt.Composite;
11import java.awt.Graphics2D;
12import java.awt.LinearGradientPaint;
13import java.awt.MultipleGradientPaint;
14import java.awt.Paint;
15import java.awt.Point;
16import java.awt.Rectangle;
17import java.awt.RenderingHints;
18import java.awt.Stroke;
19import java.awt.image.BufferedImage;
20import java.awt.image.DataBufferInt;
21import java.awt.image.Raster;
22import java.io.BufferedReader;
23import java.io.IOException;
24import java.util.ArrayList;
25import java.util.Arrays;
26import java.util.Collections;
27import java.util.Date;
28import java.util.LinkedList;
29import java.util.List;
30import java.util.Objects;
31import java.util.Random;
32
33import javax.swing.ImageIcon;
34
35import org.openstreetmap.josm.data.Bounds;
36import org.openstreetmap.josm.data.SystemOfMeasurement;
37import org.openstreetmap.josm.data.SystemOfMeasurement.SoMChangeListener;
38import org.openstreetmap.josm.data.coor.LatLon;
39import org.openstreetmap.josm.data.gpx.GpxConstants;
40import org.openstreetmap.josm.data.gpx.GpxData;
41import org.openstreetmap.josm.data.gpx.GpxData.GpxDataChangeEvent;
42import org.openstreetmap.josm.data.gpx.GpxData.GpxDataChangeListener;
43import org.openstreetmap.josm.data.gpx.Line;
44import org.openstreetmap.josm.data.gpx.WayPoint;
45import org.openstreetmap.josm.data.preferences.NamedColorProperty;
46import org.openstreetmap.josm.gui.MapView;
47import org.openstreetmap.josm.gui.MapViewState;
48import org.openstreetmap.josm.gui.layer.GpxLayer;
49import org.openstreetmap.josm.gui.layer.MapViewGraphics;
50import org.openstreetmap.josm.gui.layer.MapViewPaintable;
51import org.openstreetmap.josm.gui.layer.MapViewPaintable.MapViewEvent;
52import org.openstreetmap.josm.gui.layer.MapViewPaintable.PaintableInvalidationEvent;
53import org.openstreetmap.josm.gui.layer.MapViewPaintable.PaintableInvalidationListener;
54import org.openstreetmap.josm.gui.preferences.display.GPXSettingsPanel;
55import org.openstreetmap.josm.io.CachedFile;
56import org.openstreetmap.josm.spi.preferences.Config;
57import org.openstreetmap.josm.tools.ColorScale;
58import org.openstreetmap.josm.tools.JosmRuntimeException;
59import org.openstreetmap.josm.tools.Logging;
60import org.openstreetmap.josm.tools.Stopwatch;
61import org.openstreetmap.josm.tools.Utils;
62
63/**
64 * Class that helps to draw large set of GPS tracks with different colors and options
65 * @since 7319
66 */
67public class GpxDrawHelper implements SoMChangeListener, MapViewPaintable.LayerPainter, PaintableInvalidationListener, GpxDataChangeListener {
68
69 /**
70 * The default color property that is used for drawing GPX points.
71 * @since 15496
72 */
73 public static final NamedColorProperty DEFAULT_COLOR_PROPERTY = new NamedColorProperty(marktr("gps point"), Color.magenta);
74
75 private final GpxData data;
76 private final GpxLayer layer;
77
78 // draw lines between points belonging to different segments
79 private boolean forceLines;
80 // use alpha blending for line draw
81 private boolean alphaLines;
82 // draw direction arrows on the lines
83 private boolean arrows;
84 /** width of line for paint **/
85 private int lineWidth;
86 /** don't draw lines if longer than x meters **/
87 private int maxLineLength;
88 // draw lines
89 private boolean lines;
90 /** paint large dots for points **/
91 private boolean large;
92 private int largesize;
93 private boolean hdopCircle;
94 /** paint direction arrow with alternate math. may be faster **/
95 private boolean arrowsFast;
96 /** don't draw arrows nearer to each other than this **/
97 private int arrowsDelta;
98 private double minTrackDurationForTimeColoring;
99
100 /** maximum value of displayed HDOP, minimum is 0 */
101 private int hdoprange;
102
103 private static final double PHI = Utils.toRadians(15);
104
105 //// Variables used only to check cache validity
106 private boolean computeCacheInSync;
107 private int computeCacheMaxLineLengthUsed;
108 private Color computeCacheColorUsed;
109 private boolean computeCacheColorDynamic;
110 private ColorMode computeCacheColored;
111 private int computeCacheVelocityTune;
112 private int computeCacheHeatMapDrawColorTableIdx;
113 private boolean computeCacheHeatMapDrawPointMode;
114 private int computeCacheHeatMapDrawGain;
115 private int computeCacheHeatMapDrawLowerLimit;
116
117 private Color colorCache;
118 private Color colorCacheTransparent;
119
120 //// Color-related fields
121 /** Mode of the line coloring **/
122 private ColorMode colored;
123 /** max speed for coloring - allows to tweak line coloring for different speed levels. **/
124 private int velocityTune;
125 private boolean colorModeDynamic;
126 private Color neutralColor;
127 private int largePointAlpha;
128
129 // default access is used to allow changing from plugins
130 private ColorScale velocityScale;
131 /** Colors (without custom alpha channel, if given) for HDOP painting. **/
132 private ColorScale hdopScale;
133 private ColorScale qualityScale;
134 private ColorScale dateScale;
135 private ColorScale directionScale;
136
137 /** Opacity for hdop points **/
138 private int hdopAlpha;
139
140 // lookup array to draw arrows without doing any math
141 private static final int ll0 = 9;
142 private static final int sl4 = 5;
143 private static final int sl9 = 3;
144 private static final int[][] dir = {
145 {+sl4, +ll0, +ll0, +sl4}, {-sl9, +ll0, +sl9, +ll0},
146 {-ll0, +sl4, -sl4, +ll0}, {-ll0, -sl9, -ll0, +sl9},
147 {-sl4, -ll0, -ll0, -sl4}, {+sl9, -ll0, -sl9, -ll0},
148 {+ll0, -sl4, +sl4, -ll0}, {+ll0, +sl9, +ll0, -sl9}
149 };
150
151 /** heat map parameters **/
152
153 // draw small extra line
154 private boolean heatMapDrawExtraLine;
155 // used index for color table (parameter)
156 private int heatMapDrawColorTableIdx;
157 // use point or line draw mode
158 private boolean heatMapDrawPointMode;
159 // extra gain > 0 or < 0 attenuation, 0 = default
160 private int heatMapDrawGain;
161 // do not draw elements with value lower than this limit
162 private int heatMapDrawLowerLimit;
163
164 // normal buffered image and draw object (cached)
165 private BufferedImage heatMapImgGray;
166 private Graphics2D heatMapGraph2d;
167
168 // some cached values
169 Rectangle heatMapCacheScreenBounds = new Rectangle();
170 MapViewState heatMapMapViewState;
171 int heatMapCacheLineWith;
172
173 // copied value for line drawing
174 private final List<Integer> heatMapPolyX = new ArrayList<>();
175 private final List<Integer> heatMapPolyY = new ArrayList<>();
176
177 // setup color maps used by heat map
178 private static Color[] heatMapLutColorJosmInferno = createColorFromResource("inferno");
179 private static Color[] heatMapLutColorJosmViridis = createColorFromResource("viridis");
180 private static Color[] heatMapLutColorJosmBrown2Green = createColorFromResource("brown2green");
181 private static Color[] heatMapLutColorJosmRed2Blue = createColorFromResource("red2blue");
182
183 private static Color[] rtkLibQualityColors = {
184 Color.GREEN, // Fixed, solution by carrier‐based relative positioning and the integer ambiguity is properly resolved.
185 Color.ORANGE, // Float, solution by carrier‐based relative positioning but the integer ambiguity is not resolved.
186 Color.PINK, // Reserved
187 Color.BLUE, // DGPS, solution by code‐based DGPS solutions or single point positioning with SBAS corrections
188 Color.RED, // Single, solution by single point positioning
189 Color.CYAN // PPP
190 };
191
192 // user defined heatmap color
193 private Color[] heatMapLutColor = createColorLut(0, Color.BLACK, Color.WHITE);
194
195 // The heat map was invalidated since the last draw.
196 private boolean gpxLayerInvalidated;
197
198 private void setupColors() {
199 hdopAlpha = Config.getPref().getInt("hdop.color.alpha", -1);
200 velocityScale = ColorScale.createHSBScale(256);
201 /** Colors (without custom alpha channel, if given) for HDOP painting. **/
202 hdopScale = ColorScale.createHSBScale(256).makeReversed().addTitle(tr("HDOP"));
203 qualityScale = ColorScale.createFixedScale(rtkLibQualityColors).addTitle(tr("Quality"));
204 dateScale = ColorScale.createHSBScale(256).addTitle(tr("Time"));
205 directionScale = ColorScale.createCyclicScale(256).setIntervalCount(4).addTitle(tr("Direction"));
206
207 systemOfMeasurementChanged(null, null);
208 }
209
210 @Override
211 public void systemOfMeasurementChanged(String oldSoM, String newSoM) {
212 SystemOfMeasurement som = SystemOfMeasurement.getSystemOfMeasurement();
213 velocityScale.addTitle(tr("Velocity, {0}", som.speedName));
214 layer.invalidate();
215 }
216
217 /**
218 * Different color modes
219 */
220 public enum ColorMode {
221 /**
222 * No special colors
223 */
224 NONE,
225 /**
226 * Color by velocity
227 */
228 VELOCITY,
229 /**
230 * Color by accuracy
231 */
232 HDOP,
233 /**
234 * Color by traveling direction
235 */
236 DIRECTION,
237 /**
238 * Color by time
239 */
240 TIME,
241 /**
242 * Color using a heatmap instead of normal lines
243 */
244 HEATMAP,
245 /**
246 * Color by quality (RTKLib)
247 */
248 QUALITY;
249
250 static ColorMode fromIndex(final int index) {
251 return values()[index];
252 }
253
254 int toIndex() {
255 return Arrays.asList(values()).indexOf(this);
256 }
257 }
258
259 /**
260 * Constructs a new {@code GpxDrawHelper}.
261 * @param gpxLayer The layer to draw
262 * @since 12157
263 */
264 public GpxDrawHelper(GpxLayer gpxLayer) {
265 layer = gpxLayer;
266 data = gpxLayer.data;
267 data.addChangeListener(this);
268
269 layer.addInvalidationListener(this);
270 SystemOfMeasurement.addSoMChangeListener(this);
271 setupColors();
272 }
273
274 /**
275 * Read coloring mode for specified layer from preferences
276 * @return coloring mode
277 */
278 public ColorMode getColorMode() {
279 try {
280 int i = optInt("colormode");
281 if (i == -1) i = 0; //global
282 return ColorMode.fromIndex(i);
283 } catch (IndexOutOfBoundsException e) {
284 Logging.warn(e);
285 }
286 return ColorMode.NONE;
287 }
288
289 private String opt(String key) {
290 return GPXSettingsPanel.getLayerPref(layer, key);
291 }
292
293 private boolean optBool(String key) {
294 return Boolean.parseBoolean(opt(key));
295 }
296
297 private int optInt(String key) {
298 return GPXSettingsPanel.getLayerPrefInt(layer, key);
299 }
300
301 /**
302 * Read all drawing-related settings from preferences
303 **/
304 public void readPreferences() {
305 forceLines = optBool("lines.force");
306 arrows = optBool("lines.arrows");
307 arrowsFast = optBool("lines.arrows.fast");
308 arrowsDelta = optInt("lines.arrows.min-distance");
309 lineWidth = optInt("lines.width");
310 alphaLines = optBool("lines.alpha-blend");
311
312 int l = optInt("lines");
313 // -1 = global (default: all)
314 // 0 = none
315 // 1 = local
316 // 2 = all
317 if (!data.fromServer) { //local settings apply
318 maxLineLength = optInt("lines.max-length.local");
319 lines = l != 0; // don't draw if "none"
320 } else {
321 maxLineLength = optInt("lines.max-length");
322 lines = l != 0 && l != 1; //don't draw if "none" or "local only"
323 }
324 large = optBool("points.large");
325 largesize = optInt("points.large.size");
326 hdopCircle = optBool("points.hdopcircle");
327 colored = getColorMode();
328 velocityTune = optInt("colormode.velocity.tune");
329 colorModeDynamic = optBool("colormode.dynamic-range");
330 /* good HDOP's are between 1 and 3, very bad HDOP's go into 3 digit values */
331 hdoprange = Config.getPref().getInt("hdop.range", 7);
332 minTrackDurationForTimeColoring = optInt("colormode.time.min-distance");
333 largePointAlpha = optInt("points.large.alpha") & 0xFF;
334
335 // get heatmap parameters
336 heatMapDrawExtraLine = optBool("colormode.heatmap.line-extra");
337 heatMapDrawColorTableIdx = optInt("colormode.heatmap.colormap");
338 heatMapDrawPointMode = optBool("colormode.heatmap.use-points");
339 heatMapDrawGain = optInt("colormode.heatmap.gain");
340 heatMapDrawLowerLimit = optInt("colormode.heatmap.lower-limit");
341
342 // shrink to range
343 heatMapDrawGain = Utils.clamp(heatMapDrawGain, -10, 10);
344 neutralColor = DEFAULT_COLOR_PROPERTY.get();
345 velocityScale.setNoDataColor(neutralColor);
346 dateScale.setNoDataColor(neutralColor);
347 hdopScale.setNoDataColor(neutralColor);
348 qualityScale.setNoDataColor(neutralColor);
349 directionScale.setNoDataColor(neutralColor);
350
351 largesize += lineWidth;
352 }
353
354 @Override
355 public void paint(MapViewGraphics graphics) {
356 Bounds clipBounds = graphics.getClipBounds().getLatLonBoundsBox();
357 List<WayPoint> visibleSegments = listVisibleSegments(clipBounds);
358 if (!visibleSegments.isEmpty()) {
359 readPreferences();
360 drawAll(graphics.getDefaultGraphics(), graphics.getMapView(), visibleSegments, clipBounds);
361 if (graphics.getMapView().getLayerManager().getActiveLayer() == layer) {
362 drawColorBar(graphics.getDefaultGraphics(), graphics.getMapView());
363 }
364 }
365 }
366
367 private List<WayPoint> listVisibleSegments(Bounds box) {
368 WayPoint last = null;
369 LinkedList<WayPoint> visibleSegments = new LinkedList<>();
370
371 ensureTrackVisibilityLength();
372 for (Line segment : data.getLinesIterable(layer.trackVisibility)) {
373
374 for (WayPoint pt : segment) {
375 Bounds b = new Bounds(pt.getCoor());
376 if (pt.drawLine && last != null) {
377 b.extend(last.getCoor());
378 }
379 if (b.intersects(box)) {
380 if (last != null && (visibleSegments.isEmpty()
381 || visibleSegments.getLast() != last)) {
382 if (last.drawLine) {
383 WayPoint l = new WayPoint(last);
384 l.drawLine = false;
385 visibleSegments.add(l);
386 } else {
387 visibleSegments.add(last);
388 }
389 }
390 visibleSegments.add(pt);
391 }
392 last = pt;
393 }
394 }
395 return visibleSegments;
396 }
397
398 /** ensures the trackVisibility array has the correct length without losing data.
399 * TODO: Make this nicer by syncing the trackVisibility automatically.
400 * additional entries are initialized to true;
401 */
402 private void ensureTrackVisibilityLength() {
403 final int l = data.getTracks().size();
404 if (l == layer.trackVisibility.length)
405 return;
406 final int m = Math.min(l, layer.trackVisibility.length);
407 layer.trackVisibility = Arrays.copyOf(layer.trackVisibility, l);
408 for (int i = m; i < l; i++) {
409 layer.trackVisibility[i] = true;
410 }
411 }
412
413 /**
414 * Draw all enabled GPX elements of layer.
415 * @param g the common draw object to use
416 * @param mv the meta data to current displayed area
417 * @param visibleSegments segments visible in the current scope of mv
418 * @param clipBounds the clipping rectangle for the current view
419 * @since 14748 : new parameter clipBounds
420 */
421 public void drawAll(Graphics2D g, MapView mv, List<WayPoint> visibleSegments, Bounds clipBounds) {
422
423 final Stopwatch stopwatch = Stopwatch.createStarted();
424
425 checkCache();
426
427 // STEP 2b - RE-COMPUTE CACHE DATA *********************
428 if (!computeCacheInSync) { // don't compute if the cache is good
429 calculateColors();
430 // update the WaiPoint.drawline attributes
431 visibleSegments.clear();
432 visibleSegments.addAll(listVisibleSegments(clipBounds));
433 }
434
435 fixColors(visibleSegments);
436
437 // backup the environment
438 Composite oldComposite = g.getComposite();
439 Stroke oldStroke = g.getStroke();
440 Paint oldPaint = g.getPaint();
441
442 // set hints for the render
443 g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
444 Config.getPref().getBoolean("mappaint.gpx.use-antialiasing", false) ?
445 RenderingHints.VALUE_ANTIALIAS_ON : RenderingHints.VALUE_ANTIALIAS_OFF);
446
447 if (lineWidth > 0) {
448 g.setStroke(new BasicStroke(lineWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
449 }
450
451 // global enabled or select via color
452 boolean useHeatMap = ColorMode.HEATMAP == colored;
453
454 // default global alpha level
455 float layerAlpha = 1.00f;
456
457 // extract current alpha blending value
458 if (oldComposite instanceof AlphaComposite) {
459 layerAlpha = ((AlphaComposite) oldComposite).getAlpha();
460 }
461
462 // use heatmap background layer
463 if (useHeatMap) {
464 drawHeatMap(g, mv, visibleSegments);
465 } else {
466 // use normal line style or alpha-blending lines
467 if (!alphaLines) {
468 drawLines(g, mv, visibleSegments);
469 } else {
470 drawLinesAlpha(g, mv, visibleSegments, layerAlpha);
471 }
472 }
473
474 // override global alpha settings (smooth overlay)
475 if (alphaLines || useHeatMap) {
476 g.setComposite(AlphaComposite.SrcOver.derive(0.25f * layerAlpha));
477 }
478
479 // normal overlays
480 drawArrows(g, mv, visibleSegments);
481 drawPoints(g, mv, visibleSegments);
482
483 // restore environment
484 g.setPaint(oldPaint);
485 g.setStroke(oldStroke);
486 g.setComposite(oldComposite);
487
488 // show some debug info
489 if (Logging.isDebugEnabled() && !visibleSegments.isEmpty()) {
490 Logging.debug("gpxdraw::draw takes " +
491 stopwatch +
492 "(" +
493 "segments= " + visibleSegments.size() +
494 ", per 10000 = " + Utils.getDurationString(10_000 * stopwatch.elapsed() / visibleSegments.size()) +
495 ")"
496 );
497 }
498 }
499
500 /**
501 * Calculate colors of way segments based on latest configuration settings
502 */
503 public void calculateColors() {
504 double minval = +1e10;
505 double maxval = -1e10;
506 WayPoint oldWp = null;
507
508 if (colorModeDynamic) {
509 if (colored == ColorMode.VELOCITY) {
510 final List<Double> velocities = new ArrayList<>();
511 for (Line segment : data.getLinesIterable(null)) {
512 if (!forceLines) {
513 oldWp = null;
514 }
515 for (WayPoint trkPnt : segment) {
516 if (!trkPnt.isLatLonKnown()) {
517 continue;
518 }
519 if (oldWp != null && trkPnt.getTimeInMillis() > oldWp.getTimeInMillis()) {
520 double vel = trkPnt.getCoor().greatCircleDistance(oldWp.getCoor())
521 / (trkPnt.getTime() - oldWp.getTime());
522 velocities.add(vel);
523 }
524 oldWp = trkPnt;
525 }
526 }
527 Collections.sort(velocities);
528 if (velocities.isEmpty()) {
529 velocityScale.setRange(0, 120/3.6);
530 } else {
531 minval = velocities.get(velocities.size() / 20); // 5% percentile to remove outliers
532 maxval = velocities.get(velocities.size() * 19 / 20); // 95% percentile to remove outliers
533 velocityScale.setRange(minval, maxval);
534 }
535 } else if (colored == ColorMode.HDOP) {
536 for (Line segment : data.getLinesIterable(null)) {
537 for (WayPoint trkPnt : segment) {
538 Object val = trkPnt.get(GpxConstants.PT_HDOP);
539 if (val != null) {
540 double hdop = ((Float) val).doubleValue();
541 if (hdop > maxval) {
542 maxval = hdop;
543 }
544 if (hdop < minval) {
545 minval = hdop;
546 }
547 }
548 }
549 }
550 if (minval >= maxval) {
551 hdopScale.setRange(0, 100);
552 } else {
553 hdopScale.setRange(minval, maxval);
554 }
555 }
556 oldWp = null;
557 } else { // color mode not dynamic
558 velocityScale.setRange(0, velocityTune);
559 hdopScale.setRange(0, hdoprange);
560 qualityScale.setRange(1, rtkLibQualityColors.length);
561 }
562 double now = System.currentTimeMillis()/1000.0;
563 if (colored == ColorMode.TIME) {
564 Date[] bounds = data.getMinMaxTimeForAllTracks();
565 if (bounds.length >= 2) {
566 minval = bounds[0].getTime()/1000.0;
567 maxval = bounds[1].getTime()/1000.0;
568 } else {
569 minval = 0;
570 maxval = now;
571 }
572 dateScale.setRange(minval, maxval);
573 }
574
575 // Now the colors for all the points will be assigned
576 for (Line segment : data.getLinesIterable(null)) {
577 if (!forceLines) { // don't draw lines between segments, unless forced to
578 oldWp = null;
579 }
580 for (WayPoint trkPnt : segment) {
581 LatLon c = trkPnt.getCoor();
582 trkPnt.customColoring = segment.getColor();
583 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
584 continue;
585 }
586 // now we are sure some color will be assigned
587 Color color = null;
588
589 if (colored == ColorMode.HDOP) {
590 color = hdopScale.getColor((Float) trkPnt.get(GpxConstants.PT_HDOP));
591 } else if (colored == ColorMode.QUALITY) {
592 color = qualityScale.getColor((Integer) trkPnt.get(GpxConstants.RTKLIB_Q));
593 }
594 if (oldWp != null) { // other coloring modes need segment for calcuation
595 double dist = c.greatCircleDistance(oldWp.getCoor());
596 boolean noDraw = false;
597 switch (colored) {
598 case VELOCITY:
599 double dtime = trkPnt.getTime() - oldWp.getTime();
600 if (dtime > 0) {
601 color = velocityScale.getColor(dist / dtime);
602 } else {
603 color = velocityScale.getNoDataColor();
604 }
605 break;
606 case DIRECTION:
607 double dirColor = oldWp.getCoor().bearing(trkPnt.getCoor());
608 color = directionScale.getColor(dirColor);
609 break;
610 case TIME:
611 double t = trkPnt.getTime();
612 // skip bad timestamps and very short tracks
613 if (t > 0 && t <= now && maxval - minval > minTrackDurationForTimeColoring) {
614 color = dateScale.getColor(t);
615 } else {
616 color = dateScale.getNoDataColor();
617 }
618 break;
619 default: // Do nothing
620 }
621 if (!noDraw && (!segment.isUnordered() || !data.fromServer) && (maxLineLength == -1 || dist <= maxLineLength)) {
622 trkPnt.drawLine = true;
623 double bearing = oldWp.getCoor().bearing(trkPnt.getCoor());
624 trkPnt.dir = ((int) (bearing / Math.PI * 4 + 1.5)) % 8;
625 } else {
626 trkPnt.drawLine = false;
627 }
628 } else { // make sure we reset outdated data
629 trkPnt.drawLine = false;
630 color = segment.getColor();
631 }
632 if (color != null) {
633 trkPnt.customColoring = color;
634 }
635 oldWp = trkPnt;
636 }
637 }
638
639 // heat mode
640 if (ColorMode.HEATMAP == colored) {
641
642 // get new user color map and refresh visibility level
643 heatMapLutColor = createColorLut(heatMapDrawLowerLimit,
644 selectColorMap(neutralColor != null ? neutralColor : Color.WHITE, heatMapDrawColorTableIdx));
645
646 // force redraw of image
647 heatMapMapViewState = null;
648 }
649
650 computeCacheInSync = true;
651 }
652
653 /**
654 * Draw all GPX ways segments
655 * @param g the common draw object to use
656 * @param mv the meta data to current displayed area
657 * @param visibleSegments segments visible in the current scope of mv
658 */
659 private void drawLines(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) {
660 if (lines) {
661 Point old = null;
662 for (WayPoint trkPnt : visibleSegments) {
663 if (!trkPnt.isLatLonKnown()) {
664 old = null;
665 continue;
666 }
667 Point screen = mv.getPoint(trkPnt);
668 // skip points that are on the same screenposition
669 if (trkPnt.drawLine && old != null && ((old.x != screen.x) || (old.y != screen.y))) {
670 g.setColor(trkPnt.customColoring);
671 g.drawLine(old.x, old.y, screen.x, screen.y);
672 }
673 old = screen;
674 }
675 }
676 }
677
678 /**
679 * Draw all GPX arrays
680 * @param g the common draw object to use
681 * @param mv the meta data to current displayed area
682 * @param visibleSegments segments visible in the current scope of mv
683 */
684 private void drawArrows(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) {
685 /****************************************************************
686 ********** STEP 3b - DRAW NICE ARROWS **************************
687 ****************************************************************/
688 if (lines && arrows && !arrowsFast) {
689 Point old = null;
690 Point oldA = null; // last arrow painted
691 for (WayPoint trkPnt : visibleSegments) {
692 if (!trkPnt.isLatLonKnown()) {
693 old = null;
694 continue;
695 }
696 if (trkPnt.drawLine) {
697 Point screen = mv.getPoint(trkPnt);
698 // skip points that are on the same screenposition
699 if (old != null
700 && (oldA == null || screen.x < oldA.x - arrowsDelta || screen.x > oldA.x + arrowsDelta
701 || screen.y < oldA.y - arrowsDelta || screen.y > oldA.y + arrowsDelta)) {
702 g.setColor(trkPnt.customColoring);
703 double t = Math.atan2((double) screen.y - old.y, (double) screen.x - old.x) + Math.PI;
704 g.drawLine(screen.x, screen.y, (int) (screen.x + 10 * Math.cos(t - PHI)),
705 (int) (screen.y + 10 * Math.sin(t - PHI)));
706 g.drawLine(screen.x, screen.y, (int) (screen.x + 10 * Math.cos(t + PHI)),
707 (int) (screen.y + 10 * Math.sin(t + PHI)));
708 oldA = screen;
709 }
710 old = screen;
711 }
712 } // end for trkpnt
713 }
714
715 /****************************************************************
716 ********** STEP 3c - DRAW FAST ARROWS **************************
717 ****************************************************************/
718 if (lines && arrows && arrowsFast) {
719 Point old = null;
720 Point oldA = null; // last arrow painted
721 for (WayPoint trkPnt : visibleSegments) {
722 LatLon c = trkPnt.getCoor();
723 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
724 continue;
725 }
726 if (trkPnt.drawLine) {
727 Point screen = mv.getPoint(trkPnt);
728 // skip points that are on the same screenposition
729 if (old != null
730 && (oldA == null || screen.x < oldA.x - arrowsDelta || screen.x > oldA.x + arrowsDelta
731 || screen.y < oldA.y - arrowsDelta || screen.y > oldA.y + arrowsDelta)) {
732 g.setColor(trkPnt.customColoring);
733 g.drawLine(screen.x, screen.y, screen.x + dir[trkPnt.dir][0], screen.y
734 + dir[trkPnt.dir][1]);
735 g.drawLine(screen.x, screen.y, screen.x + dir[trkPnt.dir][2], screen.y
736 + dir[trkPnt.dir][3]);
737 oldA = screen;
738 }
739 old = screen;
740 }
741 } // end for trkpnt
742 }
743 }
744
745 /**
746 * Draw all GPX points
747 * @param g the common draw object to use
748 * @param mv the meta data to current displayed area
749 * @param visibleSegments segments visible in the current scope of mv
750 */
751 private void drawPoints(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) {
752 /****************************************************************
753 ********** STEP 3d - DRAW LARGE POINTS AND HDOP CIRCLE *********
754 ****************************************************************/
755 if (large || hdopCircle) {
756 final int halfSize = largesize/2;
757 for (WayPoint trkPnt : visibleSegments) {
758 LatLon c = trkPnt.getCoor();
759 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
760 continue;
761 }
762 Point screen = mv.getPoint(trkPnt);
763
764 if (hdopCircle && trkPnt.get(GpxConstants.PT_HDOP) != null) {
765 // hdop value
766 float hdop = (Float) trkPnt.get(GpxConstants.PT_HDOP);
767 if (hdop < 0) {
768 hdop = 0;
769 }
770 Color customColoringTransparent = hdopAlpha < 0 ? trkPnt.customColoring :
771 new Color((trkPnt.customColoring.getRGB() & 0x00ffffff) | (hdopAlpha << 24), true);
772 g.setColor(customColoringTransparent);
773 // hdop circles
774 int hdopp = mv.getPoint(new LatLon(
775 trkPnt.getCoor().lat(),
776 trkPnt.getCoor().lon() + 2d*6*hdop*360/40000000d)).x - screen.x;
777 g.drawArc(screen.x-hdopp/2, screen.y-hdopp/2, hdopp, hdopp, 0, 360);
778 }
779 if (large) {
780 // color the large GPS points like the gps lines
781 if (trkPnt.customColoring != null) {
782 if (trkPnt.customColoring.equals(colorCache) && colorCacheTransparent != null) {
783 g.setColor(colorCacheTransparent);
784 } else {
785 Color customColoringTransparent = largePointAlpha < 0 ? trkPnt.customColoring :
786 new Color((trkPnt.customColoring.getRGB() & 0x00ffffff) | (largePointAlpha << 24), true);
787
788 g.setColor(customColoringTransparent);
789 colorCache = trkPnt.customColoring;
790 colorCacheTransparent = customColoringTransparent;
791 }
792 }
793 g.fillRect(screen.x-halfSize, screen.y-halfSize, largesize, largesize);
794 }
795 } // end for trkpnt
796 } // end if large || hdopcircle
797
798 /****************************************************************
799 ********** STEP 3e - DRAW SMALL POINTS FOR LINES ***************
800 ****************************************************************/
801 if (!large && lines) {
802 g.setColor(neutralColor);
803 for (WayPoint trkPnt : visibleSegments) {
804 LatLon c = trkPnt.getCoor();
805 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
806 continue;
807 }
808 if (!trkPnt.drawLine) {
809 g.setColor(trkPnt.customColoring);
810 Point screen = mv.getPoint(trkPnt);
811 g.drawRect(screen.x, screen.y, 0, 0);
812 }
813 } // end for trkpnt
814 } // end if large
815
816 /****************************************************************
817 ********** STEP 3f - DRAW SMALL POINTS INSTEAD OF LINES ********
818 ****************************************************************/
819 if (!large && !lines) {
820 g.setColor(neutralColor);
821 for (WayPoint trkPnt : visibleSegments) {
822 LatLon c = trkPnt.getCoor();
823 if (Double.isNaN(c.lat()) || Double.isNaN(c.lon())) {
824 continue;
825 }
826 Point screen = mv.getPoint(trkPnt);
827 g.setColor(trkPnt.customColoring);
828 g.drawRect(screen.x, screen.y, 0, 0);
829 } // end for trkpnt
830 } // end if large
831 }
832
833 /**
834 * Draw GPX lines by using alpha blending
835 * @param g the common draw object to use
836 * @param mv the meta data to current displayed area
837 * @param visibleSegments segments visible in the current scope of mv
838 * @param layerAlpha the color alpha value set for that operation
839 */
840 private void drawLinesAlpha(Graphics2D g, MapView mv, List<WayPoint> visibleSegments, float layerAlpha) {
841
842 // 1st. backup the paint environment ----------------------------------
843 Composite oldComposite = g.getComposite();
844 Stroke oldStroke = g.getStroke();
845 Paint oldPaint = g.getPaint();
846
847 // 2nd. determine current scale factors -------------------------------
848
849 // adjust global settings
850 final int globalLineWidth = Utils.clamp(lineWidth, 1, 20);
851
852 // cache scale of view
853 final double zoomScale = mv.getDist100Pixel() / 50.0f;
854
855 // 3rd. determine current paint parameters -----------------------------
856
857 // alpha value is based on zoom and line with combined with global layer alpha
858 float theLineAlpha = (float) Utils.clamp((0.50 / zoomScale) / (globalLineWidth + 1), 0.01, 0.50) * layerAlpha;
859 final int theLineWith = (int) (lineWidth / zoomScale) + 1;
860
861 // 4th setup virtual paint area ----------------------------------------
862
863 // set line format and alpha channel for all overlays (more lines -> few overlap -> more transparency)
864 g.setStroke(new BasicStroke(theLineWith, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
865 g.setComposite(AlphaComposite.SrcOver.derive(theLineAlpha));
866
867 // last used / calculated entries
868 Point lastPaintPnt = null;
869
870 // 5th draw the layer ---------------------------------------------------
871
872 // for all points
873 for (WayPoint trkPnt : visibleSegments) {
874
875 // transform coordinates
876 final Point paintPnt = mv.getPoint(trkPnt);
877
878 // skip single points
879 if (lastPaintPnt != null && trkPnt.drawLine && !lastPaintPnt.equals(paintPnt)) {
880
881 // set different color
882 g.setColor(trkPnt.customColoring);
883
884 // draw it
885 g.drawLine(lastPaintPnt.x, lastPaintPnt.y, paintPnt.x, paintPnt.y);
886 }
887
888 lastPaintPnt = paintPnt;
889 }
890
891 // @last restore modified paint environment -----------------------------
892 g.setPaint(oldPaint);
893 g.setStroke(oldStroke);
894 g.setComposite(oldComposite);
895 }
896
897 /**
898 * Generates a linear gradient map image
899 *
900 * @param width image width
901 * @param height image height
902 * @param colors 1..n color descriptions
903 * @return image object
904 */
905 protected static BufferedImage createImageGradientMap(int width, int height, Color... colors) {
906
907 // create image an paint object
908 final BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
909 final Graphics2D g = img.createGraphics();
910
911 float[] fract = new float[ colors.length ];
912
913 // distribute fractions (define position of color in map)
914 for (int i = 0; i < colors.length; ++i) {
915 fract[i] = i * (1.0f / colors.length);
916 }
917
918 // draw the gradient map
919 LinearGradientPaint gradient = new LinearGradientPaint(0, 0, width, height, fract, colors,
920 MultipleGradientPaint.CycleMethod.NO_CYCLE);
921 g.setPaint(gradient);
922 g.fillRect(0, 0, width, height);
923 g.dispose();
924
925 // access it via raw interface
926 return img;
927 }
928
929 /**
930 * Creates a distributed colormap by linear blending between colors
931 * @param lowerLimit lower limit for first visible color
932 * @param colors 1..n colors
933 * @return array of Color objects
934 */
935 protected static Color[] createColorLut(int lowerLimit, Color... colors) {
936
937 // number of lookup entries
938 final int tableSize = 256;
939
940 // access it via raw interface
941 final Raster imgRaster = createImageGradientMap(tableSize, 1, colors).getData();
942
943 // the pixel storage
944 int[] pixel = new int[1];
945
946 Color[] colorTable = new Color[tableSize];
947
948 // map the range 0..255 to 0..pi/2
949 final double mapTo90Deg = Math.PI / 2.0 / 255.0;
950
951 // create the lookup table
952 for (int i = 0; i < tableSize; i++) {
953
954 // get next single pixel
955 imgRaster.getDataElements(i, 0, pixel);
956
957 // get color and map
958 Color c = new Color(pixel[0]);
959
960 // smooth alpha like sin curve
961 int alpha = (i > lowerLimit) ? (int) (Math.sin((i-lowerLimit) * mapTo90Deg) * 255) : 0;
962
963 // alpha with pre-offset, first color -> full transparent
964 alpha = alpha > 0 ? (20 + alpha) : 0;
965
966 // shrink to maximum bound
967 if (alpha > 255) {
968 alpha = 255;
969 }
970
971 // increase transparency for higher values ( avoid big saturation )
972 if (i > 240 && 255 == alpha) {
973 alpha -= (i - 240);
974 }
975
976 // fill entry in table, assign a alpha value
977 colorTable[i] = new Color(c.getRed(), c.getGreen(), c.getBlue(), alpha);
978 }
979
980 // transform into lookup table
981 return colorTable;
982 }
983
984 /**
985 * Creates a darker color
986 * @param in Color object
987 * @param adjust darker adjustment amount
988 * @return new Color
989 */
990 protected static Color darkerColor(Color in, float adjust) {
991
992 final float r = (float) in.getRed()/255;
993 final float g = (float) in.getGreen()/255;
994 final float b = (float) in.getBlue()/255;
995
996 return new Color(r*adjust, g*adjust, b*adjust);
997 }
998
999 /**
1000 * Creates a colormap by using a static color map with 1..n colors (RGB 0.0 ..1.0)
1001 * @param str the filename (without extension) to look for into data/gpx
1002 * @return the parsed colormap
1003 */
1004 protected static Color[] createColorFromResource(String str) {
1005
1006 // create resource string
1007 final String colorFile = "resource://data/gpx/" + str + ".txt";
1008
1009 List<Color> colorList = new ArrayList<>();
1010
1011 // try to load the file
1012 try (CachedFile cf = new CachedFile(colorFile); BufferedReader br = cf.getContentReader()) {
1013
1014 String line;
1015
1016 // process lines
1017 while ((line = br.readLine()) != null) {
1018
1019 // use comma as separator
1020 String[] column = line.split(",");
1021
1022 // empty or comment line
1023 if (column.length < 3 || column[0].startsWith("#")) {
1024 continue;
1025 }
1026
1027 // extract RGB value
1028 float r = Float.parseFloat(column[0]);
1029 float g = Float.parseFloat(column[1]);
1030 float b = Float.parseFloat(column[2]);
1031
1032 // some color tables are 0..1.0 and some 0.255
1033 float scale = (r < 1 && g < 1 && b < 1) ? 1 : 255;
1034
1035 colorList.add(new Color(r/scale, g/scale, b/scale));
1036 }
1037 } catch (IOException e) {
1038 throw new JosmRuntimeException(e);
1039 }
1040
1041 // fallback if empty or failed
1042 if (colorList.isEmpty()) {
1043 colorList.add(Color.BLACK);
1044 colorList.add(Color.WHITE);
1045 } else {
1046 // add additional darker elements to end of list
1047 final Color lastColor = colorList.get(colorList.size() - 1);
1048 colorList.add(darkerColor(lastColor, 0.975f));
1049 colorList.add(darkerColor(lastColor, 0.950f));
1050 }
1051
1052 return createColorLut(0, colorList.toArray(new Color[0]));
1053 }
1054
1055 /**
1056 * Returns the next user color map
1057 *
1058 * @param userColor - default or fallback user color
1059 * @param tableIdx - selected user color index
1060 * @return color array
1061 */
1062 protected static Color[] selectColorMap(Color userColor, int tableIdx) {
1063
1064 // generate new user color map ( dark, user color, white )
1065 Color[] userColor1 = createColorLut(0, userColor.darker(), userColor, userColor.brighter(), Color.WHITE);
1066
1067 // generate new user color map ( white -> color )
1068 Color[] userColor2 = createColorLut(0, Color.WHITE, Color.WHITE, userColor);
1069
1070 // generate new user color map
1071 Color[] colorTrafficLights = createColorLut(0, Color.WHITE, Color.GREEN.darker(), Color.YELLOW, Color.RED);
1072
1073 // decide what, keep order is sync with setting on GUI
1074 Color[][] lut = {
1075 userColor1,
1076 userColor2,
1077 colorTrafficLights,
1078 heatMapLutColorJosmInferno,
1079 heatMapLutColorJosmViridis,
1080 heatMapLutColorJosmBrown2Green,
1081 heatMapLutColorJosmRed2Blue
1082 };
1083
1084 // default case
1085 Color[] nextUserColor = userColor1;
1086
1087 // select by index
1088 if (tableIdx < lut.length) {
1089 nextUserColor = lut[ tableIdx ];
1090 }
1091
1092 // adjust color map
1093 return nextUserColor;
1094 }
1095
1096 /**
1097 * Generates a Icon
1098 *
1099 * @param userColor selected user color
1100 * @param tableIdx tabled index
1101 * @param size size of the image
1102 * @return a image icon that shows the
1103 */
1104 public static ImageIcon getColorMapImageIcon(Color userColor, int tableIdx, int size) {
1105 return new ImageIcon(createImageGradientMap(size, size, selectColorMap(userColor, tableIdx)));
1106 }
1107
1108 /**
1109 * Draw gray heat map with current Graphics2D setting
1110 * @param gB the common draw object to use
1111 * @param mv the meta data to current displayed area
1112 * @param listSegm segments visible in the current scope of mv
1113 * @param foreComp composite use to draw foreground objects
1114 * @param foreStroke stroke use to draw foreground objects
1115 * @param backComp composite use to draw background objects
1116 * @param backStroke stroke use to draw background objects
1117 */
1118 private void drawHeatGrayLineMap(Graphics2D gB, MapView mv, List<WayPoint> listSegm,
1119 Composite foreComp, Stroke foreStroke,
1120 Composite backComp, Stroke backStroke) {
1121
1122 // draw foreground
1123 boolean drawForeground = foreComp != null && foreStroke != null;
1124
1125 // set initial values
1126 gB.setStroke(backStroke); gB.setComposite(backComp);
1127
1128 // get last point in list
1129 final WayPoint lastPnt = !listSegm.isEmpty() ? listSegm.get(listSegm.size() - 1) : null;
1130
1131 // for all points, draw single lines by using optimized drawing
1132 for (WayPoint trkPnt : listSegm) {
1133
1134 // get transformed coordinates
1135 final Point paintPnt = mv.getPoint(trkPnt);
1136
1137 // end of line segment or end of list reached
1138 if (!trkPnt.drawLine || (lastPnt == trkPnt)) {
1139
1140 // convert to primitive type
1141 final int[] polyXArr = heatMapPolyX.stream().mapToInt(Integer::intValue).toArray();
1142 final int[] polyYArr = heatMapPolyY.stream().mapToInt(Integer::intValue).toArray();
1143
1144 // a.) draw background
1145 gB.drawPolyline(polyXArr, polyYArr, polyXArr.length);
1146
1147 // b.) draw extra foreground
1148 if (drawForeground && heatMapDrawExtraLine) {
1149
1150 gB.setStroke(foreStroke); gB.setComposite(foreComp);
1151 gB.drawPolyline(polyXArr, polyYArr, polyXArr.length);
1152 gB.setStroke(backStroke); gB.setComposite(backComp);
1153 }
1154
1155 // drop used points
1156 heatMapPolyX.clear(); heatMapPolyY.clear();
1157 }
1158
1159 // store only the integer part (make sense because pixel is 1:1 here)
1160 heatMapPolyX.add((int) paintPnt.getX());
1161 heatMapPolyY.add((int) paintPnt.getY());
1162 }
1163 }
1164
1165 /**
1166 * Map the gray map to heat map and draw them with current Graphics2D setting
1167 * @param g the common draw object to use
1168 * @param imgGray gray scale input image
1169 * @param sampleRaster the line with for drawing
1170 * @param outlineWidth line width for outlines
1171 */
1172 private void drawHeatMapGrayMap(Graphics2D g, BufferedImage imgGray, int sampleRaster, int outlineWidth) {
1173
1174 final int[] imgPixels = ((DataBufferInt) imgGray.getRaster().getDataBuffer()).getData();
1175
1176 // samples offset and bounds are scaled with line width derived from zoom level
1177 final int offX = Math.max(1, sampleRaster);
1178 final int offY = Math.max(1, sampleRaster);
1179
1180 final int maxPixelX = imgGray.getWidth();
1181 final int maxPixelY = imgGray.getHeight();
1182
1183 // always full or outlines at big samples rasters
1184 final boolean drawOutlines = (outlineWidth > 0) && ((0 == sampleRaster) || (sampleRaster > 10));
1185
1186 // backup stroke
1187 final Stroke oldStroke = g.getStroke();
1188
1189 // use basic stroke for outlines and default transparency
1190 g.setStroke(new BasicStroke(outlineWidth));
1191
1192 int lastPixelX = 0;
1193 int lastPixelColor = 0;
1194
1195 // resample gray scale image with line linear weight of next sample in line
1196 // process each line and draw pixels / rectangles with same color with one operations
1197 for (int y = 0; y < maxPixelY; y += offY) {
1198
1199 // the lines offsets
1200 final int lastLineOffset = maxPixelX * (y+0);
1201 final int nextLineOffset = maxPixelX * (y+1);
1202
1203 for (int x = 0; x < maxPixelX; x += offX) {
1204
1205 int thePixelColor = 0; int thePixelCount = 0;
1206
1207 // sample the image (it is gray scale)
1208 int offset = lastLineOffset + x;
1209
1210 // merge next pixels of window of line
1211 for (int k = 0; k < offX && (offset + k) < nextLineOffset; k++) {
1212 thePixelColor += imgPixels[offset+k] & 0xFF;
1213 thePixelCount++;
1214 }
1215
1216 // mean value
1217 thePixelColor = thePixelCount > 0 ? (thePixelColor / thePixelCount) : 0;
1218
1219 // restart -> use initial sample
1220 if (0 == x) {
1221 lastPixelX = 0; lastPixelColor = thePixelColor - 1;
1222 }
1223
1224 boolean bDrawIt = false;
1225
1226 // when one of segment is mapped to black
1227 bDrawIt = bDrawIt || (lastPixelColor == 0) || (thePixelColor == 0);
1228
1229 // different color
1230 bDrawIt = bDrawIt || (Math.abs(lastPixelColor-thePixelColor) > 0);
1231
1232 // when line is finished draw always
1233 bDrawIt = bDrawIt || (y >= (maxPixelY-offY));
1234
1235 if (bDrawIt) {
1236
1237 // draw only foreground pixels
1238 if (lastPixelColor > 0) {
1239
1240 // gray to RGB mapping
1241 g.setColor(heatMapLutColor[ lastPixelColor ]);
1242
1243 // box from from last Y pixel to current pixel
1244 if (drawOutlines) {
1245 g.drawRect(lastPixelX, y, offX + x - lastPixelX, offY);
1246 } else {
1247 g.fillRect(lastPixelX, y, offX + x - lastPixelX, offY);
1248 }
1249 }
1250
1251 // restart detection
1252 lastPixelX = x; lastPixelColor = thePixelColor;
1253 }
1254 }
1255 }
1256
1257 // recover
1258 g.setStroke(oldStroke);
1259 }
1260
1261 /**
1262 * Collect and draw GPS segments and displays a heat-map
1263 * @param g the common draw object to use
1264 * @param mv the meta data to current displayed area
1265 * @param visibleSegments segments visible in the current scope of mv
1266 */
1267 private void drawHeatMap(Graphics2D g, MapView mv, List<WayPoint> visibleSegments) {
1268
1269 // get bounds of screen image and projection, zoom and adjust input parameters
1270 final Rectangle screenBounds = new Rectangle(mv.getWidth(), mv.getHeight());
1271 final MapViewState mapViewState = mv.getState();
1272 final double zoomScale = mv.getDist100Pixel() / 50.0f;
1273
1274 // adjust global settings ( zero = default line width )
1275 final int globalLineWidth = (0 == lineWidth) ? 1 : Utils.clamp(lineWidth, 1, 20);
1276
1277 // 1st setup virtual paint area ----------------------------------------
1278
1279 // new image buffer needed
1280 final boolean imageSetup = null == heatMapImgGray || !heatMapCacheScreenBounds.equals(screenBounds);
1281
1282 // screen bounds changed, need new image buffer ?
1283 if (imageSetup) {
1284 // we would use a "pure" grayscale image, but there is not efficient way to map gray scale values to RGB)
1285 heatMapImgGray = new BufferedImage(screenBounds.width, screenBounds.height, BufferedImage.TYPE_INT_ARGB);
1286 heatMapGraph2d = heatMapImgGray.createGraphics();
1287 heatMapGraph2d.setBackground(new Color(0, 0, 0, 255));
1288 heatMapGraph2d.setColor(Color.WHITE);
1289
1290 // fast draw ( maybe help or not )
1291 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);
1292 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);
1293 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_SPEED);
1294 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_DITHERING, RenderingHints.VALUE_DITHER_DISABLE);
1295 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);
1296 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
1297 heatMapGraph2d.setRenderingHint(RenderingHints.KEY_COLOR_RENDERING, RenderingHints.VALUE_COLOR_RENDER_SPEED);
1298
1299 // cache it
1300 heatMapCacheScreenBounds = screenBounds;
1301 }
1302
1303 // 2nd. determine current scale factors -------------------------------
1304
1305 // the line width (foreground: draw extra small footprint line of track)
1306 int lineWidthB = (int) Math.max(1.5f * (globalLineWidth / zoomScale) + 1, 2);
1307 int lineWidthF = lineWidthB > 2 ? (globalLineWidth - 1) : 0;
1308
1309 // global alpha adjustment
1310 float lineAlpha = (float) Utils.clamp((0.40 / zoomScale) / (globalLineWidth + 1), 0.01, 0.40);
1311
1312 // adjust 0.15 .. 1.85
1313 float scaleAlpha = 1.0f + ((heatMapDrawGain/10.0f) * 0.85f);
1314
1315 // add to calculated values
1316 float lineAlphaBPoint = (float) Utils.clamp((lineAlpha * 0.65) * scaleAlpha, 0.001, 0.90);
1317 float lineAlphaBLine = (float) Utils.clamp((lineAlpha * 1.00) * scaleAlpha, 0.001, 0.90);
1318 float lineAlphaFLine = (float) Utils.clamp((lineAlpha / 1.50) * scaleAlpha, 0.001, 0.90);
1319
1320 // 3rd Calculate the heat map data by draw GPX traces with alpha value ----------
1321
1322 // recalculation of image needed
1323 final boolean imageRecalc = !mapViewState.equalsInWindow(heatMapMapViewState)
1324 || gpxLayerInvalidated
1325 || heatMapCacheLineWith != globalLineWidth;
1326
1327 // need re-generation of gray image ?
1328 if (imageSetup || imageRecalc) {
1329
1330 // clear background
1331 heatMapGraph2d.clearRect(0, 0, heatMapImgGray.getWidth(), heatMapImgGray.getHeight());
1332
1333 // point or line blending
1334 if (heatMapDrawPointMode) {
1335 heatMapGraph2d.setComposite(AlphaComposite.SrcOver.derive(lineAlphaBPoint));
1336 drawHeatGrayDotMap(heatMapGraph2d, mv, visibleSegments, lineWidthB);
1337
1338 } else {
1339 drawHeatGrayLineMap(heatMapGraph2d, mv, visibleSegments,
1340 lineWidthF > 1 ? AlphaComposite.SrcOver.derive(lineAlphaFLine) : null,
1341 new BasicStroke(lineWidthF, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND),
1342 AlphaComposite.SrcOver.derive(lineAlphaBLine),
1343 new BasicStroke(lineWidthB, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND));
1344 }
1345
1346 // remember draw parameter
1347 heatMapMapViewState = mapViewState;
1348 heatMapCacheLineWith = globalLineWidth;
1349 gpxLayerInvalidated = false;
1350 }
1351
1352 // 4th. Draw data on target layer, map data via color lookup table --------------
1353 drawHeatMapGrayMap(g, heatMapImgGray, lineWidthB > 2 ? (int) (lineWidthB*1.25f) : 1, lineWidth > 2 ? (lineWidth - 2) : 1);
1354 }
1355
1356 /**
1357 * Draw a dotted heat map
1358 *
1359 * @param gB the common draw object to use
1360 * @param mv the meta data to current displayed area
1361 * @param listSegm segments visible in the current scope of mv
1362 * @param drawSize draw size of draw element
1363 */
1364 private static void drawHeatGrayDotMap(Graphics2D gB, MapView mv, List<WayPoint> listSegm, int drawSize) {
1365
1366 // typical rendering rate -> use realtime preview instead of accurate display
1367 final double maxSegm = 25_000, nrSegms = listSegm.size();
1368
1369 // determine random drop rate
1370 final double randomDrop = Math.min(nrSegms > maxSegm ? (nrSegms - maxSegm) / nrSegms : 0, 0.70f);
1371
1372 // http://www.nstb.tc.faa.gov/reports/PAN94_0716.pdf#page=22
1373 // Global Average Position Domain Accuracy, typical -> not worst case !
1374 // < 4.218 m Vertical
1375 // < 2.168 m Horizontal
1376 final double pixelRmsX = (100 / mv.getDist100Pixel()) * 2.168;
1377 final double pixelRmsY = (100 / mv.getDist100Pixel()) * 4.218;
1378
1379 Point lastPnt = null;
1380
1381 // for all points, draw single lines
1382 for (WayPoint trkPnt : listSegm) {
1383
1384 // get transformed coordinates
1385 final Point paintPnt = mv.getPoint(trkPnt);
1386
1387 // end of line segment or end of list reached
1388 if (trkPnt.drawLine && null != lastPnt) {
1389 drawHeatSurfaceLine(gB, paintPnt, lastPnt, drawSize, pixelRmsX, pixelRmsY, randomDrop);
1390 }
1391
1392 // remember
1393 lastPnt = paintPnt;
1394 }
1395 }
1396
1397 /**
1398 * Draw a dotted surface line
1399 *
1400 * @param g the common draw object to use
1401 * @param fromPnt start point
1402 * @param toPnt end point
1403 * @param drawSize size of draw elements
1404 * @param rmsSizeX RMS size of circle for X (width)
1405 * @param rmsSizeY RMS size of circle for Y (height)
1406 * @param dropRate Pixel render drop rate
1407 */
1408 private static void drawHeatSurfaceLine(Graphics2D g,
1409 Point fromPnt, Point toPnt, int drawSize, double rmsSizeX, double rmsSizeY, double dropRate) {
1410
1411 // collect frequently used items
1412 final long fromX = (long) fromPnt.getX(); final long deltaX = (long) (toPnt.getX() - fromX);
1413 final long fromY = (long) fromPnt.getY(); final long deltaY = (long) (toPnt.getY() - fromY);
1414
1415 // use same random values for each point
1416 final Random heatMapRandom = new Random(fromX+fromY+deltaX+deltaY);
1417
1418 // cache distance between start and end point
1419 final int dist = (int) Math.abs(fromPnt.distance(toPnt));
1420
1421 // number of increment ( fill wide distance tracks )
1422 double scaleStep = Math.max(1.0f / dist, dist > 100 ? 0.10f : 0.20f);
1423
1424 // number of additional random points
1425 int rounds = Math.min(drawSize/2, 1)+1;
1426
1427 // decrease random noise at high drop rate ( more accurate draw of fewer points )
1428 rmsSizeX *= (1.0d - dropRate);
1429 rmsSizeY *= (1.0d - dropRate);
1430
1431 double scaleVal = 0;
1432
1433 // interpolate line draw ( needs separate point instead of line )
1434 while (scaleVal < (1.0d-0.0001d)) {
1435
1436 // get position
1437 final double pntX = fromX + scaleVal * deltaX;
1438 final double pntY = fromY + scaleVal * deltaY;
1439
1440 // add random distribution around sampled point
1441 for (int k = 0; k < rounds; k++) {
1442
1443 // add error distribution, first point with less error
1444 int x = (int) (pntX + heatMapRandom.nextGaussian() * (k > 0 ? rmsSizeX : rmsSizeX/4));
1445 int y = (int) (pntY + heatMapRandom.nextGaussian() * (k > 0 ? rmsSizeY : rmsSizeY/4));
1446
1447 // draw it, even drop is requested
1448 if (heatMapRandom.nextDouble() >= dropRate) {
1449 g.fillRect(x-drawSize, y-drawSize, drawSize, drawSize);
1450 }
1451 }
1452 scaleVal += scaleStep;
1453 }
1454 }
1455
1456 /**
1457 * Apply default color configuration to way segments
1458 * @param visibleSegments segments visible in the current scope of mv
1459 */
1460 private void fixColors(List<WayPoint> visibleSegments) {
1461 for (WayPoint trkPnt : visibleSegments) {
1462 if (trkPnt.customColoring == null) {
1463 trkPnt.customColoring = neutralColor;
1464 }
1465 }
1466 }
1467
1468 /**
1469 * Check cache validity set necessary flags
1470 */
1471 private void checkCache() {
1472 // CHECKSTYLE.OFF: BooleanExpressionComplexity
1473 if ((computeCacheMaxLineLengthUsed != maxLineLength)
1474 || (computeCacheColored != colored)
1475 || (computeCacheVelocityTune != velocityTune)
1476 || (computeCacheColorDynamic != colorModeDynamic)
1477 || (computeCacheHeatMapDrawColorTableIdx != heatMapDrawColorTableIdx)
1478 || !Objects.equals(neutralColor, computeCacheColorUsed)
1479 || (computeCacheHeatMapDrawPointMode != heatMapDrawPointMode)
1480 || (computeCacheHeatMapDrawGain != heatMapDrawGain)
1481 || (computeCacheHeatMapDrawLowerLimit != heatMapDrawLowerLimit)
1482 ) {
1483 // CHECKSTYLE.ON: BooleanExpressionComplexity
1484 computeCacheMaxLineLengthUsed = maxLineLength;
1485 computeCacheInSync = false;
1486 computeCacheColorUsed = neutralColor;
1487 computeCacheColored = colored;
1488 computeCacheVelocityTune = velocityTune;
1489 computeCacheColorDynamic = colorModeDynamic;
1490 computeCacheHeatMapDrawColorTableIdx = heatMapDrawColorTableIdx;
1491 computeCacheHeatMapDrawPointMode = heatMapDrawPointMode;
1492 computeCacheHeatMapDrawGain = heatMapDrawGain;
1493 computeCacheHeatMapDrawLowerLimit = heatMapDrawLowerLimit;
1494 }
1495 }
1496
1497 /**
1498 * callback when data is changed, invalidate cached configuration parameters
1499 */
1500 @Override
1501 public void gpxDataChanged(GpxDataChangeEvent e) {
1502 computeCacheInSync = false;
1503 }
1504
1505 /**
1506 * Draw all GPX arrays
1507 * @param g the common draw object to use
1508 * @param mv the meta data to current displayed area
1509 */
1510 public void drawColorBar(Graphics2D g, MapView mv) {
1511 int w = mv.getWidth();
1512
1513 // set do default
1514 g.setComposite(AlphaComposite.SrcOver.derive(1.00f));
1515
1516 if (colored == ColorMode.HDOP) {
1517 hdopScale.drawColorBar(g, w-30, 50, 20, 100, 1.0);
1518 } else if (colored == ColorMode.QUALITY) {
1519 qualityScale.drawColorBar(g, w-30, 50, 20, 100, 1.0);
1520 } else if (colored == ColorMode.VELOCITY) {
1521 SystemOfMeasurement som = SystemOfMeasurement.getSystemOfMeasurement();
1522 velocityScale.drawColorBar(g, w-30, 50, 20, 100, som.speedValue);
1523 } else if (colored == ColorMode.DIRECTION) {
1524 directionScale.drawColorBar(g, w-30, 50, 20, 100, 180.0/Math.PI);
1525 }
1526 }
1527
1528 @Override
1529 public void paintableInvalidated(PaintableInvalidationEvent event) {
1530 gpxLayerInvalidated = true;
1531 }
1532
1533 @Override
1534 public void detachFromMapView(MapViewEvent event) {
1535 SystemOfMeasurement.removeSoMChangeListener(this);
1536 layer.removeInvalidationListener(this);
1537 data.removeChangeListener(this);
1538 }
1539}
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