Changeset 587 in josm for trunk/src/org/openstreetmap/josm/data/coor/LatLon.java

Timestamp:

2008-03-21T01:24:05+01:00 (16 years ago)

Author:

framm

Message:

• new boolean config option draw.rawgps.direction enables arrowheads on lines between GPS points (only if lines are drawn). can currently only be set manually or through expert mode. Fixes #650.
• new integer config option draw.rawgps.max-line-length can be set to suppress line drawing between GPS points further apart than the configured value (in metres). Beware: Using this option will SLOW THINGS DOWN because distance computation is expensive. can currently only be set manually or through expert mode. Fixes #494.

File:

• trunk/src/org/openstreetmap/josm/data/coor/LatLon.java (modified) (2 diffs)

trunk/src/org/openstreetmap/josm/data/coor/LatLon.java

@@ -2 +2 @@
 package org.openstreetmap.josm.data.coor;
 
+import org.openstreetmap.josm.Main;
 import org.openstreetmap.josm.data.Bounds;
 import org.openstreetmap.josm.data.projection.Projection;
@@ -51 +52 @@
                 return lat() >= b.min.lat() && lat() <= b.max.lat() && lon() > b.min.lon() && lon() < b.max.lon();
         }
+        
+        /**
+         * Computes the distance between this lat/lon and another point on the earth.
+         * Uses spherical law of cosines formula, not Haversine.
+         * @param other the other point.
+         * @return distance in metres.
+         */
+        public int distance(LatLon other) {
+                return (int) (Math.acos(
+                        Math.sin(Math.toRadians(lat())) * Math.sin(Math.toRadians(other.lat())) + 
+                    Math.cos(Math.toRadians(lat()))*Math.cos(Math.toRadians(other.lat())) *
+                                  Math.cos(Math.toRadians(other.lon()-lon()))) * 6378135);
+        }
 
         /**