Update Test_Sighting.html

Updated bearing calcs from phone experiment to get portrait/landscape correct
pdr0663 · Sep 2, 2024 · 33379aa · 33379aa
1 parent 03d327a
commit 33379aa
Showing 1 changed file with 8 additions and 5 deletions.
diff --git a/Test_Sighting.html b/Test_Sighting.html
@@ -36,20 +36,23 @@ <h1>Compass Bearing</h1>
         // Function to update the bearing
         function updateBearing(event) {
             let alpha = event.alpha;
-            /*
+
             // Adjust for different screen orientations
-            if (window.orientation === 90) {  // Landscape left
+            if (window.orientation === 0) {  // Portrait
                 alpha -= 90;
             } else if (window.orientation === -90) {  // Landscape right
-                alpha += 90;
+                alpha -= 180;
+            } else if (window.orientation === -90) {  // Landscape left
+                // alpha += 0;
             } else if (window.orientation === 180) {  // Portrait upside-down
-                alpha += 180;
+                // Chrome doesn't seem to allow this orientation
+                // alpha += 180;
             }
 
             // Invert the alpha to correct the direction
             alpha = 360 - alpha;
 
-            // Add declination for Sydney
+            // Add declination for Sydney to yield true bearing
             alpha += 13
 
             // Normalize the alpha value to be between 0 and 360