replace compass sprite

flockompass.kv

@@ -62,11 +62,9 @@
         FloatLayout:
             canvas:
                 Color:
-                    rgb: .08, .08, .08
+                    rgb: .9, .9, .9
                 Rectangle:
                     size: self.size
-            Image:
-                source: 'rose.png'
             Image:
                 source: 'needle.png'
                 canvas.before:

main.py

@@ -79,7 +79,7 @@ class FlockompassApp(App):
             self.fbearing = atan2(sin(lon2 - lon1) * cos(lat2),
                                   cos(lat1) * sin(lat2)
                                   - sin(lat1) * cos(lat2) * cos(lon2-lon1))
-            self.fbearing = self.needle_angle - degrees(self.fbearing)
+            self.fbearing = self.needle_angle - degrees(self.fbearing) + 90
             self.fbearing = (self.fbearing + 360) % 360
 
     def center_map_on_gps(self):
@@ -100,7 +100,7 @@ class FlockompassApp(App):
             angle = atan2(y, x)
             self.last_angle = smoothingFactor * self.last_angle  + (1 - smoothingFactor) * angle
 
-            needle_angle = degrees(self.last_angle)
+            needle_angle = degrees(self.last_angle) - 90
         
         # fix animation transition around the unit circle
         if (self.needle_angle % 360) - needle_angle > 180:
@@ -114,13 +114,13 @@ class FlockompassApp(App):
         if self.cs._anim:
             self.cs._anim.stop(self)
         self.cs._anim = Animation(needle_angle=needle_angle,
-                                  d=0.1,
+                                  d=0.2,
                                   t='out_quad')
         self.cs._anim.start(self)
 
     def compass_enable(self):
         self.cs.facade.enable()
-        Clock.schedule_interval(self.get_field, 1 / 10.0)
+        Clock.schedule_interval(self.get_field, 1 / 33.3)
 
     def compass_disable(self):
         self.cs.facade.disable()