goto() command for navigation in Drone Programming - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the goto() command do in drone programming?

The goto() command tells the drone to fly to a specific location or set of coordinates.

beginner

How do you specify the destination in the goto() command?

You specify the destination by giving coordinates like latitude, longitude, and sometimes altitude.

intermediate

Why is it important to check the drone's current position before using goto()?

Because the drone needs to know where it is to plan the best path to the destination safely.

intermediate

Can the goto() command be used to navigate to moving targets?

Usually, goto() is for fixed points. For moving targets, more advanced tracking commands are needed.

advanced

What happens if the drone encounters an obstacle while executing goto()?

The drone may stop, avoid the obstacle if programmed, or return to a safe point depending on its obstacle avoidance system.

What parameters are typically needed for the goto() command?

A Drone model and color

B Speed and battery level

C Latitude, longitude, altitude

D Camera angle and zoom

The goto() command requires coordinates like latitude, longitude, and altitude to navigate.

If a drone is at position A and you use goto() to position B, what does the drone do?

A Lands immediately

B Returns to the starting point

C Turns off

D Flies directly to position B

The drone flies from its current position to the specified destination using goto().

Which of these is NOT a typical use of goto() in drone programming?

A Track a moving object

B Navigate to a waypoint

C Fly to a home location

D Move to a specific altitude

goto() is for fixed points, not for tracking moving objects.

What should you do before using goto() to ensure safe navigation?

A Check current position and battery

B Turn off the drone

C Remove the propellers

D Change the drone's color

Checking position and battery helps ensure the drone can safely reach the destination.

If the drone encounters an obstacle during goto(), what is a possible behavior?

A Speed up

B Avoid the obstacle or stop

C Ignore and crash

D Change color

Drones with obstacle avoidance will try to avoid or stop to prevent crashes.

Explain how the goto() command works for drone navigation.

Think about how you tell a friend to go somewhere using an address.

Describe safety checks you should do before using goto() in a drone program.

Like checking your car's fuel and route before a trip.

Practice

1. What does the goto(x, y, z, speed) command do in drone programming?

easy

A. Moves the drone to the specified coordinates at the given speed.

B. Starts the drone's camera recording.

C. Lands the drone immediately.

D. Turns the drone around 360 degrees.

Solution

1. Step 1: Understand the purpose of goto()

   The goto() command is designed to move the drone to a specific location using coordinates.

2. Step 2: Analyze the parameters

   The parameters x, y, z represent the position in space, and speed controls how fast the drone moves there.

3. Final Answer:

   Moves the drone to the specified coordinates at the given speed. -> Option A

4. Quick Check:

   goto() moves drone = A [OK]

Hint: Remember: goto() moves drone to coordinates fast or slow [OK]

Common Mistakes:

• Confusing goto() with camera or landing commands
• Ignoring the speed parameter
• Thinking goto() rotates the drone

2. Which of the following is the correct syntax to move a drone to position (10, 20, 5) at speed 3 using goto()?

easy

A. goto(10, 20, 3, 5)

B. goto(10, 20, 5, 3)

C. goto(3, 10, 20, 5)

D. goto(5, 3, 10, 20)

Solution

1. Step 1: Identify parameter order

   The goto() command takes parameters in order: x, y, z, speed.

2. Step 2: Match values to parameters

   Given position (10, 20, 5) and speed 3, the correct call is goto(10, 20, 5, 3).

3. Final Answer:

   goto(10, 20, 5, 3) -> Option B

4. Quick Check:

   Order is x,y,z,speed = C [OK]

Hint: Remember parameter order: x, y, z, then speed [OK]

Common Mistakes:

• Mixing up speed with coordinate values
• Changing parameter order
• Using wrong numbers for coordinates

3. What will be the drone's final position after running this code?

goto(5, 5, 10, 2)
goto(10, 10, 5, 4)

medium

A. (0, 0, 0)

B. (5, 5, 10)

C. (15, 15, 15)

D. (10, 10, 5)

Solution

1. Step 1: Execute first goto()

   The drone moves to coordinates (5, 5, 10) at speed 2.

2. Step 2: Execute second goto()

   The drone then moves to (10, 10, 5) at speed 4, which is the final position.

3. Final Answer:

   (10, 10, 5) -> Option D

4. Quick Check:

   Last goto() position = A [OK]

Hint: Last goto() sets final position, earlier ones are overwritten [OK]

Common Mistakes:

• Adding coordinates instead of replacing
• Ignoring the second goto()
• Confusing speed with position

4. Identify the error in this code snippet:

goto(10, 20, speed=5, 3)

medium

A. Speed parameter is given before z coordinate.

B. No error; code is correct.

C. Using named argument for speed but position parameters are positional.

D. Missing one coordinate parameter.

Solution

1. Step 1: Check parameter usage

   The code mixes positional and named arguments incorrectly by placing speed=5 before the last positional argument.

2. Step 2: Understand Python argument rules

   Positional arguments must come before named arguments; here, 3 is positional after a named argument, causing a syntax error.

3. Final Answer:

   Using named argument for speed but position parameters are positional. -> Option C

4. Quick Check:

   Named args after positional = D [OK]

Hint: Named arguments must come after all positional ones [OK]

Common Mistakes:

• Placing named arguments before positional
• Assuming order doesn't matter
• Missing commas between parameters

5. You want the drone to inspect three points in order: (0,0,5), (10,0,5), and (10,10,5), each at speed 2. Which code correctly uses goto() to do this?

hard

A. goto(0, 0, 5, 2)
goto(10, 0, 5, 2)
goto(10, 10, 5, 2)

B. goto([0,0,5], 2)
goto([10,0,5], 2)
goto([10,10,5], 2)

C. goto(0, 0, 5)
goto(10, 0, 5)
goto(10, 10, 5)

D. goto(0, 0, 5, 2, 3)
goto(10, 0, 5, 2, 3)
goto(10, 10, 5, 2, 3)

Solution

1. Step 1: Check parameter correctness

   Each goto() call must have four parameters: x, y, z, and speed.

2. Step 2: Validate each option

   goto(0, 0, 5, 2) goto(10, 0, 5, 2) goto(10, 10, 5, 2) correctly uses four parameters per call. goto([0,0,5], 2) goto([10,0,5], 2) goto([10,10,5], 2) uses lists instead of separate coordinates. goto(0, 0, 5) goto(10, 0, 5) goto(10, 10, 5) misses speed. goto(0, 0, 5, 2, 3) goto(10, 0, 5, 2, 3) goto(10, 10, 5, 2, 3) has an extra parameter.

3. Final Answer:

   goto(0, 0, 5, 2) goto(10, 0, 5, 2) goto(10, 10, 5, 2) -> Option A

4. Quick Check:

   Correct parameters and order = B [OK]

Hint: Use four parameters: x, y, z, speed for each goto() [OK]

Common Mistakes:

• Passing coordinates as a list instead of separate values
• Omitting speed parameter
• Adding extra parameters