#34 Made landed habitat rotate with the surface of the Earth

The habitat maintains its heading away from the surface of the Earth
without having to reset its heading.

Also, fixed a bug where small engine values while landed could cause the
habitat to fall into the Earth.

orbitx/PhysicEntity.py

@@ -7,27 +7,21 @@ class PhysicsEntity(object):
     habitat_hull_strength=50
     spacestation_hull_strength=100
     cannot_land=0 #reserved for small astroid, to be changed
+
     def __init__(self, entity):
         assert isinstance(entity, protos.Entity)
         self.name = entity.name
         self.pos = np.asarray([entity.x, entity.y])
-        self.R = entity.r
+        self.r = entity.r
         self.v = np.asarray([entity.vx, entity.vy])
         self.m = entity.mass
         self.spin = entity.spin
         self.heading = entity.heading
         self.fuel = entity.fuel
         self.throttle = entity.throttle
-        self.attached_to =""
-        if hasattr(entity,"attached_to"):
-            self.attached_to = entity.attached_to
-        self.broken=False
-        if hasattr(entity,"broken"):
-            self.broken = entity.broken
-        self.artificial=False
-        if hasattr(entity,"artificial"):
-            self.artificial = entity.artificial
-
+        self.attached_to = entity.attached_to
+        self.broken = entity.broken
+        self.artificial = entity.artificial
 
     def as_proto(self):
         return protos.Entity(
@@ -36,7 +30,7 @@ def as_proto(self):
             y=self.pos[1],
             vx=self.v[0],
             vy=self.v[1],
-            r=self.R,
+            r=self.r,
             mass=self.m,
             spin=self.spin,
             heading=self.heading,
@@ -107,7 +101,7 @@ def spin_change(self, *, requested_spin_change=None):
 
 class Habitat():
     """Static class implementing hab engine and reaction wheel constraints."""
-    engine = Engine(max_fuel_cons=1, max_acc=100)
+    engine = Engine(max_fuel_cons=1, max_acc=12)
     rw = ReactionWheel(max_spin_change=1)
 
     @classmethod

orbitx/common.py

@@ -16,16 +16,16 @@
 
 DEFAULT_TIME_ACC = 1
 
-CHEAT_FUEL = 0
+MIN_THROTTLE = -1
+MAX_THROTTLE = 1
 
-MIN_THROTTLE = -0.2
-MAX_THROTTLE = 1.2
+LAUNCH_SEPARATION = 0.5
 
 DEBUG_LOGFILE = 'debug.log'
 PERF_FILE = 'flamegraph-data.log'
 
 # Set up a logger.
-# Log DEBUG and higher to stderr,
+# Log DEBUG and higher to the logfile,
 # Log WARNING and higher to stdout.
 logging.getLogger().setLevel(logging.DEBUG)
 logging.captureWarnings(True)
@@ -58,7 +58,7 @@
 
 
 def enable_verbose_logging():
-    """Enables logging of all messages, from DEBUG upwards"""
+    """Enables logging of all messages to stdout, from DEBUG upwards"""
     print_handler.setLevel(logging.DEBUG)