Changeset 646 in josm

Timestamp:

2008-06-09T20:06:32+02:00 (16 years ago)

Author:

framm

Message:

• patch by Henry Loenwind (ticket #720) to speed up gps rendering

Location:

trunk/src/org/openstreetmap/josm

Files:

• data/gpx/WayPoint.java (modified) (2 diffs)
• gui/layer/GpxLayer.java (modified) (5 diffs)

trunk/src/org/openstreetmap/josm/data/gpx/WayPoint.java

@@ -7 +7 @@
 import java.text.SimpleDateFormat;
 import java.util.Date;
+import java.awt.Color;
 
 import org.openstreetmap.josm.Main;
@@ -17 +18 @@
         public final EastNorth eastNorth;
         public double time;
+        public Color speedLineColor;
+        public boolean drawLine;
+        public int dir;
 
         public WayPoint(LatLon ll) {

trunk/src/org/openstreetmap/josm/gui/layer/GpxLayer.java

@@ -73 +73 @@
         private final GpxLayer me;
         protected static final double PHI = Math.toRadians(15);
+        private boolean computeCacheInSync;
+        private int computeCacheMaxLineLingthUsed;
         
         public GpxLayer(GpxData d) {
@@ -78 +80 @@
                 data = d;
                 me = this;
+                computeCacheInSync = false;
         }
 
@@ -285 +288 @@
         @Override public void mergeFrom(Layer from) {
                 data.mergeFrom(((GpxLayer)from).data);
+                computeCacheInSync = false;
         }
 
@@ -294 +298 @@
         }
 
+        // lookup array to draw arrows without doing any math
+        private static int ll0 = 9;
+        private static int sl4 = 5;
+        private static int sl9 = 3;
+        private static int[][] dir = {
+                {+sl4,+ll0,+ll0,+sl4},
+                {-sl9,+ll0,+sl9,+ll0},
+                {-ll0,+sl4,-sl4,+ll0},
+                {-ll0,-sl9,-ll0,+sl9},
+                {-sl4,-ll0,-ll0,-sl4},
+                {+sl9,-ll0,-sl9,-ll0},
+                {+ll0,-sl4,+sl4,-ll0},
+                {+ll0,+sl9,+ll0,-sl9},
+                {+sl4,+ll0,+ll0,+sl4},
+                {-sl9,+ll0,+sl9,+ll0},
+                {-ll0,+sl4,-sl4,+ll0},
+                {-ll0,-sl9,-ll0,+sl9}
+        };
+
         @Override public void paint(Graphics g, MapView mv) {
                 String gpsCol = Main.pref.get("color.gps point");
                 String gpsColSpecial = Main.pref.get("color.layer "+name);
+                Color neutralColor;
                 if (!gpsColSpecial.equals("")) {
-                        g.setColor(ColorHelper.html2color(gpsColSpecial));
+                        neutralColor = ColorHelper.html2color(gpsColSpecial);
                 } else if (!gpsCol.equals("")) {
-                        g.setColor(ColorHelper.html2color(gpsCol));
+                        neutralColor = ColorHelper.html2color(gpsCol);
                 } else{
-                        g.setColor(Color.GRAY);
-                }
+                        neutralColor = Color.GRAY;
+                }
+                g.setColor(neutralColor);
                 
-                boolean forceLines = Main.pref.getBoolean("draw.rawgps.lines.force");
-                boolean direction = Main.pref.getBoolean("draw.rawgps.direction");
-                int maxLineLength = Integer.parseInt(Main.pref.get("draw.rawgps.max-line-length", "-1"));
-                boolean lines = Main.pref.getBoolean("draw.rawgps.lines");
+                boolean forceLines = Main.pref.getBoolean("draw.rawgps.lines.force");                     // also draw lines between points belonging to different segments
+                boolean direction = Main.pref.getBoolean("draw.rawgps.direction");                        // draw direction arrows on the lines
+                int maxLineLength = Integer.parseInt(Main.pref.get("draw.rawgps.max-line-length", "-1")); // don't draw lines if longer than x meters
+                boolean lines = Main.pref.getBoolean("draw.rawgps.lines");                                // draw line between points, global setting
                 String linesKey = "draw.rawgps.lines.layer "+name;
                 if (Main.pref.hasKey(linesKey))
-                        lines = Main.pref.getBoolean(linesKey);
-                boolean large = Main.pref.getBoolean("draw.rawgps.large");
-                boolean colored = Main.pref.getBoolean("draw.rawgps.colors");
-
-                Point old = null;
+                        lines = Main.pref.getBoolean(linesKey);                                                 // draw lines, per-layer setting
+                boolean large = Main.pref.getBoolean("draw.rawgps.large");                                // paint large dots for points
+                boolean colored = Main.pref.getBoolean("draw.rawgps.colors");                             // color the lines
+                boolean alternatedirection = Main.pref.getBoolean("draw.rawgps.alternatedirection");      // paint direction arrow with alternate math. may be faster
+                boolean trianglelines = Main.pref.getBoolean("draw.rawgps.trianglelines");                // paint lines as 2 lines
+
+                if (computeCacheInSync && computeCacheMaxLineLingthUsed != maxLineLength) {
+                        computeCacheInSync = false;
+                }
+
+                if (!computeCacheInSync && lines) { // don't compute if the cache is good or if there are no lines to draw at all
+                        //System.out.println("(re-)computing gpx line styles, reason: CCIS=" + computeCacheInSync + " L=" + lines);
                 WayPoint oldWp = null;
                 for (GpxTrack trk : data.tracks) {
-                        if (!forceLines) {
-                                old = null;
-                        }
+                                if (!forceLines) { // don't draw lines between segments, unless forced to
+                                        oldWp = null;
+                        }
+                        for (Collection<WayPoint> segment : trk.trackSegs) {
+                                for (WayPoint trkPnt : segment) {
+                                                if (Double.isNaN(trkPnt.latlon.lat()) || Double.isNaN(trkPnt.latlon.lon())) {
+                                                continue;
+                                                }
+                                                if (oldWp != null) {
+                                                double dist = trkPnt.latlon.greatCircleDistance(oldWp.latlon);
+                                                double dtime = trkPnt.time - oldWp.time;
+                                                double vel = dist/dtime;
+
+                                                        if (dtime <= 0 || vel < 0 || vel > 36) { // attn: bad case first
+                                                                trkPnt.speedLineColor = colors[255];
+                                                        } else {
+                                                                trkPnt.speedLineColor = colors[(int) (7*vel)];
+                                                        }
+                                                        if (maxLineLength == -1 || dist <= maxLineLength) {
+                                                                trkPnt.drawLine = true;
+                                                                trkPnt.dir = (int)(Math.atan2(-trkPnt.eastNorth.north()+oldWp.eastNorth.north(), trkPnt.eastNorth.east()-oldWp.eastNorth.east()) / Math.PI * 4 + 3.5); // crude but works
+                                                        } else {
+                                                                trkPnt.drawLine = false;
+                                                }
+                                                } else { // make sure we reset outdated data
+                                                        trkPnt.speedLineColor = colors[255];
+                                                        trkPnt.drawLine = false;
+                                                }
+                                                oldWp = trkPnt;
+                                        }
+                                }
+                        }
+                        computeCacheInSync = true;
+                        computeCacheMaxLineLingthUsed = maxLineLength;
+                }
+                                                
+                Point old = null;
+                for (GpxTrack trk : data.tracks) {
                         for (Collection<WayPoint> segment : trk.trackSegs) {
                                 for (WayPoint trkPnt : segment) {
@@ -326 +393 @@
                                                 continue;
                                         Point screen = mv.getPoint(trkPnt.eastNorth);
-                                        if (lines && old != null) {
-                                                double dist = trkPnt.latlon.greatCircleDistance(oldWp.latlon);
-                                                double dtime = trkPnt.time - oldWp.time;
-                                                double vel = dist/dtime;
-
-                                                if (colored && dtime > 0) {
-                                                        // scale linearly until 130km/h = 36.1m/s
-                                                        if (vel < 0 || vel > 36) {
-                                                                g.setColor(colors[255]);
-                                                        } else {
-                                                                g.setColor(colors[(int) (7*vel)]);
+                                        if (lines && trkPnt.drawLine) {
+                                                if ((old.x != screen.x) || (old.y != screen.y)) { // skip points that are on the same screenposition
+                                                        if (colored) {
+                                                                g.setColor(trkPnt.speedLineColor);
                                                         }
-                                                }
-                                                
-                                            // draw line, if no maxLineLength is set or the line is shorter.
-                                            if (maxLineLength == -1 || dist <= maxLineLength){
+                                                        if (trianglelines) { // fast
+                                                                g.drawLine(screen.x, screen.y, old.x + dir[trkPnt.dir][0], old.y + dir[trkPnt.dir][1]);
+                                                                g.drawLine(screen.x, screen.y, old.x + dir[trkPnt.dir][2], old.y + dir[trkPnt.dir][3]);
+                                                        } else { // slow
                                                 g.drawLine(old.x, old.y, screen.x, screen.y);
-
+                                                        }
                                                 if (direction) {
+                                                                if (alternatedirection) { // a little bit faster
+                                                                        g.drawLine(screen.x, screen.y, screen.x + dir[trkPnt.dir][0], screen.y + dir[trkPnt.dir][1]);
+                                                                        g.drawLine(screen.x, screen.y, screen.x + dir[trkPnt.dir][2], screen.y + dir[trkPnt.dir][3]);
+                                                                } else { // a tiny bit slower, may not make a difference at all
                                                     double t = Math.atan2(screen.y-old.y, screen.x-old.x) + Math.PI;
                                                     g.drawLine(screen.x,screen.y, (int)(screen.x + 10*Math.cos(t-PHI)), (int)(screen.y + 10*Math.sin(t-PHI)));
                                                     g.drawLine(screen.x,screen.y, (int)(screen.x + 10*Math.cos(t+PHI)), (int)(screen.y + 10*Math.sin(t+PHI)));
                                                 }
+                                                        }
+                                                }
                                             }else{
-                                                g.drawRect(screen.x, screen.y, 0, 0);
+                                                if (colored) { // reset color for non-line drawing if lines are variable colored
+                                                        g.setColor(neutralColor);
                                             }
-                                                
-                                        } else if (!large) {
+                                                if (large) {
+                                                        g.fillRect(screen.x-1, screen.y-1, 3, 3);
+                                                } else {
                                                 g.drawRect(screen.x, screen.y, 0, 0);
                                         }
-                                        if (large)
-                                                g.fillRect(screen.x-1, screen.y-1, 3, 3);
+                                        }
                                         old = screen;
-                                        oldWp = trkPnt;
                                 }
                         }