small cleanup of sample files

Further documentation
simplyfy lines by separately storing the value of findControl

samples/gamepad/gamepad.py

@@ -56,16 +56,19 @@ class App(ShowBase):
         # movements by ourself
         self.disableMouse()
 
+        # list of connected gamepad devices
+        gamepads = base.devices.getDevices(InputDevice.DC_gamepad)
+
         # set the center position of the control sticks
         # NOTE: here we assume, that the wheel is centered when the application get started.
         #       In real world applications, you should notice the user and give him enough time
         #       to center the wheel until you store the center position of the controler!
-        gamepads = base.devices.getDevices(InputDevice.DC_gamepad)
         self.lxcenter = gamepads[0].findControl(InputDevice.C_left_x).state
         self.lycenter = gamepads[0].findControl(InputDevice.C_left_y).state
         self.rxcenter = gamepads[0].findControl(InputDevice.C_right_x).state
         self.rycenter = gamepads[0].findControl(InputDevice.C_right_y).state
 
+
         self.taskMgr.add(self.moveTask, "movement update task")
 
     def connect(self, device):
@@ -106,13 +109,17 @@ class App(ShowBase):
 
         # we will use the first found gamepad
         # Move the camera left/right
-        movementVec.setX(gamepads[0].findControl(InputDevice.C_left_x).state - self.lxcenter)
+        left_x = gamepads[0].findControl(InputDevice.C_left_x)
+        movementVec.setX(left_x.state - self.lxcenter)
         # Move the camera forward/backward
-        movementVec.setY(gamepads[0].findControl(InputDevice.C_left_y).state - self.lycenter)
+        left_y = gamepads[0].findControl(InputDevice.C_left_y)
+        movementVec.setY(left_y.state - self.lycenter)
         # Control the cameras heading
-        base.camera.setH(base.camera, 100 * dt * (gamepads[0].findControl(InputDevice.C_right_x).state - self.rxcenter))
+        right_x = gamepads[0].findControl(InputDevice.C_right_x)
+        base.camera.setH(base.camera, 100 * dt * (right_x.state - self.rxcenter))
         # Control the cameras pitch
-        base.camera.setP(base.camera, 100 * dt * (gamepads[0].findControl(InputDevice.C_right_y).state - self.rycenter))
+        right_y = gamepads[0].findControl(InputDevice.C_right_y)
+        base.camera.setP(base.camera, 100 * dt * (right_y.state - self.rycenter))
 
         # calculate movement
         base.camera.setX(base.camera, 100 * dt * movementVec.getX())

samples/gamepad/steeringWheel.py

@@ -114,13 +114,15 @@ class App(ShowBase):
 
         # we will use the first found wheel
         # Acclerate
-        accleration = wheels[0].findControl(InputDevice.C_accelerator).state * self.maxAccleration
-        if self.currentMoveSpeed > wheels[0].findControl(InputDevice.C_accelerator).state * self.maxSpeed:
+        acclearatorPedal = wheels[0].findControl(InputDevice.C_accelerator).state
+        accleration = accleratorPedal * self.maxAccleration
+        if self.currentMoveSpeed > accleratorPedal * self.maxSpeed:
             self.currentMoveSpeed -= dt * self.deaccleration
         self.currentMoveSpeed += dt * accleration
 
         # Break
-        deacleration = wheels[0].findControl(InputDevice.C_brake).state * self.deaclerationBreak
+        breakPedal = wheels[0].findControl(InputDevice.C_brake).state
+        deacleration = breakPedal * self.deaclerationBreak
         self.currentMoveSpeed -= dt * deacleration
         if self.currentMoveSpeed < 0:
             self.currentMoveSpeed = 0