[hamradio-commits] [dump1090] 232/389: Added distance to plane from site Just for fun. Distance is only shown if SiteShow is true in config.js-file.

[Matthew Ernisse]

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mernisse-guest pushed a commit to branch master
in repository dump1090.

commit ca314fcf2c8e5ef8a245f95887bad73c66070d4b
Author: terribl <terri at rannalla.net>
Date:   Mon May 27 11:36:23 2013 +0300

    Added distance to plane from site
    Just for fun. Distance is only shown if SiteShow is true in config.js-file.
    
    	modified:   public_html/script.js
---
 public_html/script.js | 43 +++++++++++++++++++++++++++++++++++++++----
 1 file changed, 39 insertions(+), 4 deletions(-)

diff --git a/public_html/script.js b/public_html/script.js
index 48288c8..d6048ba 100644
--- a/public_html/script.js
+++ b/public_html/script.js
@@ -267,12 +267,45 @@ function refreshSelected() {
 
 	html += '<tr><td colspan="' + columns + '" align="center">Lat/Long: ';
 	if (selected && selected.vPosition) {
-	    html += selected.latitude + ', ' + selected.longitude;
+	    html += selected.latitude + ', ' + selected.longitude + '</td></tr>';
+	    
+	    // Let's show some extra data if we have site coordinates
+	    if (SiteShow) {
+            // Converts numeric degrees to radians
+            if (typeof Number.prototype.toRad == 'undefined') {
+              Number.prototype.toRad = function() {
+                return this * Math.PI / 180;
+              }
+            }
+            
+            // Converts radians to numeric (signed) degrees
+            if (typeof Number.prototype.toDeg == 'undefined') {
+              Number.prototype.toDeg = function() {
+                return this * 180 / Math.PI;
+              }
+            }
+            
+            // Calculate distance
+            var R = 6371; // km
+            var dLat = (selected.latitude-SiteLat).toRad();
+            var dLon = (selected.longitude-SiteLon).toRad(); 
+            var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
+                Math.cos(SiteLat.toRad()) * Math.cos(selected.latitude.toRad()) * 
+                Math.sin(dLon/2) * Math.sin(dLon/2); 
+            var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
+            var dist = (R * c) / 1.852;
+            dist  = (Math.round(dist*10)/10).toFixed(1);
+            
+            html += '<tr><td colspan="' + columns + '">Distance from Site: ' + dist + ' NM</td></tr>';
+        } // End of SiteShow
 	} else {
-	    html += 'n/a';
+	    if (SiteShow) {
+	        html += '<tr><td colspan="' + columns + '">Distance from Site: n/a NM</td></tr>';
+	    } else {
+    	    html += 'n/a</td></tr>';
+    	}
 	}
-	html += '</td></tr>';
-	
+
 	html += '</table>';
 	
 	document.getElementById('plane_detail').innerHTML = html;
@@ -489,4 +522,6 @@ function selectPlaneByHex(hex) {
 	} else { 
 		SelectedPlane = null;
 	}
+    refreshSelected();
+    refreshTableInfo();
 }

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