update game controllers and keyboard interfaces + example with quadcopter and wheeled robot

examples/interfaces/mouse_keyboard.py

@@ -12,6 +12,8 @@ from pyrobolearn.tools.interfaces.mouse_keyboard import MouseKeyboardInterface
 sim = prl.simulators.Bullet()
 
 # create mouse keyboard interface
+# Note that to give the simulator `sim` to the interface can be optional especially if there is only one simulator.
+# The interface will look in the memory to check the instantiated simulators and take the first one if it exists.
 interface = MouseKeyboardInterface(sim)
 
 # run interface
@@ -20,8 +22,10 @@ for _ in count():
     interface.step()
 
     # print pressed keys
+    if len(interface.key_pressed) > 0:
+        print("Keys that are pressed: {}".format(interface.key_pressed))
     if len(interface.key_down) > 0:
-        print("Keys that are pressed: {}".format(interface.key_down))
+        print("Keys that are down: {}".format(interface.key_down))
 
     # perform a step with the simulator
     sim.step(sleep_time=sim.dt)

examples/interfaces/playstation.py

@@ -1,23 +1,33 @@
 #!/usr/bin/env python
 """Load the Playstation game controller interface
+
+How to run:
+```
+$ python playstation.py --help                   # for help
+$ python playstation.py --controller ps          # to use any PS game controller (by default)
+$ python playstation.py --controller ps3         # to use PS3 game controller
+$ python playstation.py --controller ps4         # to use PS4 game controller
+```
 """
 
 import time
 from itertools import count
 import argparse
 
-from pyrobolearn.tools.interfaces.controllers.playstation import PS3ControllerInterface, PS4ControllerInterface
+from pyrobolearn.tools.interfaces.controllers.playstation import *
 
 # create parser to select the game controller
 parser = argparse.ArgumentParser()
-parser.add_argument('-c', '--controller', help='The Playstation game controller to use (ps3 or ps4)', type=str,
-                    choices=['ps3', 'ps4'], default='ps4')
+parser.add_argument('-c', '--controller', help='The Playstation game controller to use (ps, ps3, or ps4)', type=str,
+                    choices=['ps', 'ps3', 'ps4'], default='ps')
 args = parser.parse_args()
 
 
 # load corresponding Playstation controller interface
+if args.controller == 'ps':
+    controller = PSControllerInterface(verbose=False)
 if args.controller == 'ps3':
-    controller = PS3ControllerInterface(verbose=True)
+    controller = PS3ControllerInterface(verbose=False)
 elif args.controller == 'ps4':
     controller = PS4ControllerInterface(verbose=False)
 else: