diff options
Diffstat (limited to 'robot/problems/introduction/countlines/en.py')
| -rw-r--r-- | robot/problems/introduction/countlines/en.py | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/robot/problems/introduction/countlines/en.py b/robot/problems/introduction/countlines/en.py index 8b3b275..009a752 100644 --- a/robot/problems/introduction/countlines/en.py +++ b/robot/problems/introduction/countlines/en.py @@ -7,8 +7,31 @@ name = 'Count lines' slug = 'Count lines' description = '''\ + Write a program to count the color lines on white background using the robot with a color sensor. The robot should drive forward, crossing the lines and count them. ''' hint = { - + 'mW_init':mod.hint['init'], + 'connectMotorLeft':mod.hint['connectMotorLeft'], + 'connectMotorRight':mod.hint['connectMotorRight'], + 'moveSteeringOn':mod.hint['moveSteering']+['''<p>Use move_steering method with 'on' as the first parameter <code>robot.move_steering( 'on',... )</code>.</p>'''], + 'moveSteeringOff':mod.hint['moveSteeringOff'], + 'connectColorSensor':mod.hint['connectColorSensor'], + 'colorSensorMeasure':mod.hint['colorSensorMeasure'], + 'while':['''<p>Use the while loop: inside, the robot should read the current color and increase the counter when the color changes.</p>''', + '''<p>Interrupt the loop after a certain amount of time; determine the time the robot needs to drive over all the colors experimentally; use <code>time.time()</code>.</p>''', + '''<p><code>while time.time()-start < 1.5:</code>.</p>'''], } + +plan = ['''\ +<p>The program should:</p> +<ol> + <li>create a mindstorms_widgets() object, which represents the robot in your code.</li> + <li>connect the driving motors.</li> + <li>connect the color sensor.</li> + <li>synchronize the motors and run them so that the robot would move forward.</li> + <li>inside the loop, let the robot recognize colors and increase the counter.</li> + <li>interrupt the loop after a certain amount of time.</li> + <li>stop the motors.</li> +</ol>''' +] |