Camera gimbal control in Drone Programming - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to set the gimbal pitch angle to 30 degrees.

Drone Programming

gimbal.set_pitch([1])

Drag options to blanks, or click blank then click option'

A30

B45

C60

D90

Attempts:

3 left

💡 Hint

Common Mistakes

Using an angle value that is too large or too small.

Confusing pitch with yaw or roll.

The gimbal pitch angle is set by passing the desired angle in degrees to the set_pitch method. Here, 30 degrees is the correct value.

2fill in blank

medium

Complete the code to smoothly move the gimbal yaw to 90 degrees.

Drone Programming

gimbal.move_yaw([1], speed=10)

Drag options to blanks, or click blank then click option'

A45

B0

C180

D90

Attempts:

3 left

💡 Hint

Common Mistakes

Using pitch or roll values instead of yaw.

Setting the angle to 0 which points forward.

The move_yaw method moves the gimbal horizontally. Setting it to 90 degrees points the camera to the right side.

3fill in blank

hard

Fix the error in the code to correctly set the gimbal roll angle to 15 degrees.

Drone Programming

gimbal.set_roll([1])

Drag options to blanks, or click blank then click option'

A15

B'15'

C15.0

Droll_angle

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the angle as a string like '15'.

Using a variable name that is not defined.

The set_roll method expects a numeric value without quotes. Using 15 as an integer is correct.

4fill in blank

hard

Fill both blanks to create a dictionary of gimbal angles for pitch and yaw.

Drone Programming

angles = {'pitch': [1], 'yaw': [2]

Drag options to blanks, or click blank then click option'

A30

B45

C90

D15

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping pitch and yaw values.

Using angles outside the typical range.

The dictionary stores the pitch angle as 30 and the yaw angle as 90 degrees.

5fill in blank

hard

Fill all three blanks to set pitch, yaw, and roll angles in the gimbal control dictionary.

Drone Programming

gimbal_angles = {'pitch': [1], 'yaw': [2], 'roll': [3]

Drag options to blanks, or click blank then click option'

A15

B45

C90

D30

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up the order of angles.

Using string values instead of numbers.

The dictionary sets pitch to 30, yaw to 45, and roll to 15 degrees, which are common gimbal angles.

Practice

1. What does the pitch control in a drone's camera gimbal?

easy

A. Moves the camera up and down

B. Rotates the camera left and right

C. Tilts the camera diagonally

D. Zooms the camera in and out

Solution

1. Step 1: Understand gimbal axes

   The gimbal controls three main movements: pitch, yaw, and roll.

2. Step 2: Identify pitch movement

   Pitch moves the camera up and down, changing its vertical angle.

3. Final Answer:

   Moves the camera up and down -> Option A

4. Quick Check:

   Pitch = up/down movement [OK]

Hint: Pitch always means up/down tilt [OK]

Common Mistakes:

• Confusing pitch with yaw
• Thinking pitch controls zoom
• Mixing pitch with roll

2. Which of the following is the correct syntax to set the yaw angle to 45 degrees in a drone gimbal control API?

easy

A. gimbal.setYaw(45)

B. gimbal.yaw = 45

C. gimbal.set_yaw(45)

D. gimbal.yaw(45)

Solution

1. Step 1: Identify common method naming

   In many drone APIs, methods use snake_case like set_yaw() to set angles.

2. Step 2: Check syntax correctness

   gimbal.set_yaw(45) uses gimbal.set_yaw(45), which is a valid method call with correct syntax.

3. Final Answer:

   gimbal.set_yaw(45) -> Option C

4. Quick Check:

   Method calls use parentheses and snake_case [OK]

Hint: Look for method call with parentheses and snake_case [OK]

Common Mistakes:

• Using dot assignment instead of method call
• Missing parentheses
• Using camelCase instead of snake_case

3. What will be the output of this code snippet controlling the gimbal pitch?

gimbal.set_pitch(10)
gimbal.set_pitch(gimbal.get_pitch() + 15)
print(gimbal.get_pitch())

medium

A. 10

B. 25

C. Error

D. 15

Solution

1. Step 1: Analyze first pitch set

   The first line sets pitch to 10 degrees.

2. Step 2: Analyze second pitch set

   The second line adds 15 to current pitch (10 + 15 = 25) and sets it.

3. Step 3: Print current pitch

   Printing pitch outputs 25.

4. Final Answer:

   25 -> Option B

5. Quick Check:

   10 + 15 = 25 [OK]

Hint: Add increments to current pitch before printing [OK]

Common Mistakes:

• Ignoring addition in second set
• Assuming print shows first set value
• Syntax errors in method calls

4. Identify the error in this code snippet for resetting the gimbal:

def reset_gimbal():
    gimbal.set_pitch = 0
    gimbal.set_yaw = 0
    gimbal.set_roll = 0
reset_gimbal()

medium

A. Using assignment instead of method calls

B. Missing parentheses in function call

C. Incorrect function definition syntax

D. No error, code is correct

Solution

1. Step 1: Check how gimbal angles are set

   Angles should be set by calling methods like gimbal.set_pitch(0), not by assignment.

2. Step 2: Identify incorrect assignments

   The code uses gimbal.set_pitch = 0, which overwrites the method with an integer, causing errors.

3. Final Answer:

   Using assignment instead of method calls -> Option A

4. Quick Check:

   Methods need parentheses, not assignment [OK]

Hint: Use parentheses to call methods, not '=' assignment [OK]

Common Mistakes:

• Assigning values to methods
• Forgetting parentheses
• Assuming functions are variables

5. You want to smoothly move the camera gimbal from pitch 0 to 30 degrees in 3 steps. Which code correctly implements this using a loop?

hard

A. for angle in range(0, 30):
gimbal.set_pitch(angle * 10)

B. for angle in [10, 20, 30]:
gimbal.set_pitch(angle)

C. for angle in range(0, 30, 10):
gimbal.set_pitch(angle)

D. for angle in range(0, 31, 10):
gimbal.set_pitch(angle)

Solution

1. Step 1: Understand the target angles

   The pitch should move through 0, 10, 20, and 30 degrees in steps.

2. Step 2: Check each option's range

   for angle in range(0, 31, 10): gimbal.set_pitch(angle) produces angles 0, 10, 20, 30, which smoothly moves from 0 to 30 in 4 steps.

3. Step 3: Verify other options

   for angle in [10, 20, 30]: gimbal.set_pitch(angle) -> misses starting at 0. for angle in range(0, 30, 10): gimbal.set_pitch(angle) -> stops at 20, missing 30. for angle in range(0, 30): gimbal.set_pitch(angle * 10) -> incorrect values (0 to 290).

4. Final Answer:

   for angle in range(0, 31, 10): gimbal.set_pitch(angle) -> Option D

5. Quick Check:

   Range includes 0 to 30 in steps of 10 [OK]

Hint: Use range with correct start, stop, and step for smooth movement [OK]

Common Mistakes:

• Off-by-one in range end
• Wrong step size in range
• Incorrect multiplication inside loop