1 files changed, 111 insertions, 0 deletions
diff --git a/robot/problems/introduction/rotateback/common.py~ b/robot/problems/introduction/rotateback/common.py~
new file mode 100644
index 0000000..c7c199c
--- /dev/null
+++ b/robot/problems/introduction/rotateback/common.py~
@@ -0,0 +1,111 @@
+# coding=utf-8
+
+from python.util import has_token_sequence, string_almost_equal, \
+    string_contains_number, get_tokens, get_numbers, get_exception_desc
+from server.hints import Hint, HintSequence
+
+id = 212
+group = 'introduction'
+number = 11
+visible = True
+
+solution = '''\
+from ev3dev import *
+from mindstorms_widgets import mindstorms_widgets
+
+def sgn(x):
+    return -1 if x<0 else (1 if x>0 else 0)
+
+robot = mindstorms_widgets()
+robot.connect_motor( 'left' )
+robot.connect_motor( 'right' )
+robot.connect_sensor( 'gyro' )
+robot.connect_sensor( 'touch' )
+
+smer = hitrost = 0
+robot.reset_gyro()
+robot.gyro_set_mode( 'angle' )
+prev_smer = -1
+while 1:
+    smer = robot.gyro_sensor_measure()
+    if smer!=prev_smer:
+        print ("Kot:", smer)
+        prev_smer = smer
+    
+    if robot.touch_sensor_measure():
+        robot.reset_gyro()
+        print ( robot.gyro_sensor_measure() )
+    
+    if abs(smer) < 10:
+        hitrost = 10*sgn(smer)
+    else:
+        if abs(smer) > 100:
+            hitrost = 100*sgn(smer)
+        else:
+            hitrost = smer
+    
+    if abs(smer) > 1:
+        L, R = -hitrost, hitrost
+    else:
+        L = R = 0
+    robot.move_tank('on', lr_power=[L,R])
+'''
+
+hint_type = {
+    'mW_init': Hint('mW_init'),
+    'connectMotorLeft': Hint('connectMotorLeft'),
+    'connectMotorRight': Hint('connectMotorRight'),
+    'connectGyro': Hint('connectGyro'),
+    'connectTouch': Hint('connectTouch'),
+    'resetGyro': Hint('resetGyro'),
+    'setGyroMode': Hint('setGyroMode'),
+    'gyroMeasure': Hint('gyroMeasure'),
+    'ifTouch': Hint('ifTouch'),
+    'moveTank': Hint('moveTank'),
+    'lrPower': Hint('lrPower'),
+    'while': Hint('while')
+}
+
+def hint( code):
+    tokens = get_tokens(code)
+
+    # if code does not include mindstorms_widgets(), a student gets a hint that the robot should be somehow represented in the program
+    if not has_token_sequence(tokens, ['mindstorms_widgets', '(',')']):
+        return [{'id': 'mW_init'}]
+
+    # if code does not include connect_motor statement, a student needs to learn about how to connect the motors
+    if not has_token_sequence(tokens, ['connect_motor']) and not has_token_sequence(tokens, ['left']):
+        return [{'id': 'connectMotorLeft'}]
+
+    # if code does not include connect_motor statement, a student needs to learn about how to connect the motors
+    if not has_token_sequence(tokens, ['connect_motor']) and not has_token_sequence(tokens, ['right']):
+        return [{'id': 'connectMotorRight'}]
+
+    if not has_token_sequence(tokens, ['connect_gyro','(', 'gyro', ')']):
+        return [{'id': 'connectGyro'}]
+    
+    if not has_token_sequence(tokens, ['connect_sensor','(', 'touch', ')']):
+        return [{'id': 'connectTouch'}]
+    
+    if not has_token_sequence(tokens, ['reset_gyro()']):
+        return [{'id': 'resetGyro'}]
+
+    if not has_token_sequence(tokens, ['gyro_set_mode']):
+        return [{'id': 'setGyroMode'}]
+
+    if not has_token_sequence(tokens, ['gyro_sensor_measure()']):
+        return [{'id': 'gyroMeasure'}]
+
+    if not has_token_sequence(tokens, ['if','touch_sensor_measure','(',')']):
+        return [{'id': 'ifTouch'}]
+
+    if not has_token_sequence(tokens, ['move_tank']):
+        return [{'id': 'moveTank'}]
+    
+    if not has_token_sequence(tokens, ['lr_power']):
+        return [{'id': 'lrPower'}]
+
+    if not has_token_sequence(tokens, ['while']):
+        return [{'id': 'while'}]
+
+    return None