Merge pull request #585 from alexeystn/osd_3d_speed_indicator

Add 3D speed OSD indicator

_locales/en/messages.json

@@ -2497,6 +2497,12 @@
     "osdElement_GPS_SPEED_HELP": {
         "message": "Shows GPS ground speed."
     },
+    "osdElement_3D_SPEED": {
+        "message": "3D Speed"
+    },   
+    "osdElement_3D_SPEED_HELP": {
+        "message": "Shows 3D speed considering both horizontal and vertical speed."
+    },
     "osdElement_GPS_SATS": {
         "message": "GPS Satellites"
     },

tabs/osd.js

@@ -755,6 +755,18 @@ OSD.constants = {
                         return FONT.embed_dot(' 40') + FONT.symbol(SYM.KMH);
                     }
                 },
+                {
+                    name: '3D_SPEED',
+                    id: 85,
+                    preview: function(osd_data) {
+                        // 3 chars
+                        if (OSD.data.preferences.units === 0 || OSD.data.preferences.units === 2) {
+                            // Imperial
+                            return FONT.embed_dot(' 30') + FONT.symbol(SYM.MPH);
+                        }
+                        return FONT.embed_dot(' 48') + FONT.symbol(SYM.KMH);
+                    }
+                },
                 {
                     name: 'GPS_SATS',
                     id: 14,