Forward, backward, lateral movement in Drone Programming - Mini Project: Build & Apply

Forward, backward, lateral movement

📖 Scenario: You are programming a drone to move in a simple 2D space. The drone can move forward, backward, left, and right. You will create commands to control these movements step-by-step.

🎯 Goal: Build a program that stores the drone's position and updates it based on forward, backward, and lateral movement commands.

📋 What You'll Learn

Create a variable to store the drone's starting position as coordinates

Create a variable for the movement step size

Write code to update the drone's position when moving forward, backward, left, and right

Print the final position of the drone

💡 Why This Matters

🌍 Real World

Drones use coordinate systems to navigate in space. Programming movements helps drones fly safely and reach targets.

💼 Career

Understanding basic movement commands is essential for drone programming jobs, robotics, and automation tasks.

1

Set the drone's starting position

Create a variable called position and set it to the list [0, 0] representing the drone's starting coordinates (x=0, y=0).

Drone Programming

# Create the drone's starting position as [0, 0]
# Your code here

Hint

Think of position as the drone's location on a grid, starting at the center.

2

Set the movement step size

Create a variable called step and set it to 1 to represent how far the drone moves in one command.

Drone Programming

position = [0, 0]
# Create a variable called step and set it to 1
# Your code here

Hint

The step variable controls how much the drone moves each time.

3

Move the drone forward, backward, left, and right

Update the position list to move the drone forward by increasing the y-coordinate by step, backward by decreasing y by step, left by decreasing x by step, and right by increasing x by step. Use these exact commands in order: move forward, move right, move backward, move left.

Drone Programming

position = [0, 0]
step = 1
# Move forward by increasing y
# Move right by increasing x
# Move backward by decreasing y
# Move left by decreasing x
# Your code here

Hint

Remember, position[0] is x (left-right), and position[1] is y (forward-backward).

4

Print the drone's final position

Write a print statement to display the position variable showing the drone's final coordinates.

Drone Programming

position = [0, 0]
step = 1
position[1] += step  # forward
position[0] += step  # right
position[1] -= step  # backward
position[0] -= step  # left
# Print the final position
# Your code here

Hint

The drone should end up back at the starting point [0, 0] after moving forward, right, backward, and left.

Practice

1. Which command moves the drone forward by 5 meters?

easy

A. move_right(5)

B. move_forward(5)

C. move_left(5)

D. move_backward(5)

Solution

1. Step 1: Understand the direction commands

   The command move_forward(distance) moves the drone forward by the given distance.

2. Step 2: Match the distance and direction

   Since we want to move forward by 5 meters, move_forward(5) is the correct command.

3. Final Answer:

   move_forward(5) -> Option B

4. Quick Check:

   Forward move = move_forward(5) [OK]

Hint: Forward means move_forward with distance [OK]

Common Mistakes:

• Confusing forward with backward commands
• Using lateral move commands instead of forward
• Mixing up distance units

2. Which of these is the correct syntax to move the drone 3 meters to the left?

easy

A. move_left(3)

B. moveLeft(3)

C. move_left 3

D. move_left(three)

Solution

1. Step 1: Identify correct function syntax

   The correct syntax uses the function name followed by parentheses enclosing the distance number.

2. Step 2: Check parameter type and spelling

   move_left(3) uses move_left(3) which is correct. moveLeft(3) uses camelCase which is incorrect here. move_left 3 misses parentheses. move_left(three) uses a word instead of a number.

3. Final Answer:

   move_left(3) -> Option A

4. Quick Check:

   Function call with number in parentheses [OK]

Hint: Use function_name(number) with parentheses and digits [OK]

Common Mistakes:

• Omitting parentheses in function call
• Using wrong case in function name
• Passing string instead of number

3. What is the final position of the drone after these commands starting at (0,0)?

move_forward(4)
move_right(3)
move_backward(2)
move_left(1)

medium

A. (3, 4)

B. (3, 2)

C. (2, 2)

D. (2, 3)

Solution

1. Step 1: Track vertical (forward/backward) movement

   Start at (0,0). move_forward(4) moves y from 0 to 4. move_backward(2) moves y from 4 to 2.

2. Step 2: Track horizontal (left/right) movement

   move_right(3) moves x from 0 to 3. move_left(1) moves x from 3 to 2.

3. Step 3: Calculate final coordinates

   Final position is (2, 2).

4. Final Answer:

   (2, 2) -> Option C

5. Quick Check:

   Horizontal = 3-1=2, Vertical = 4-2=2 [OK]

Hint: Add forward/backward to Y, left/right to X [OK]

Common Mistakes:

• Mixing X and Y axes
• Forgetting backward subtracts from Y
• Ignoring left movement subtracts from X

4. Identify the error in this drone movement code:

move_forward(5)
move_left(2)
move_backward()
move_right(3)

medium

A. Missing distance argument in move_backward()

B. move_left should be move_right

C. move_forward cannot be called first

D. move_right has wrong syntax

Solution

1. Step 1: Check each function call for required arguments

   All move commands require a distance number. move_backward() is missing the distance argument.

2. Step 2: Verify other commands

   move_left(2), move_forward(5), and move_right(3) all have correct syntax and arguments.

3. Final Answer:

   Missing distance argument in move_backward() -> Option A

4. Quick Check:

   Functions need distance parameter [OK]

Hint: All move commands need a number inside parentheses [OK]

Common Mistakes:

• Calling move functions without distance
• Confusing left and right commands
• Assuming order of commands matters for syntax

5. You want the drone to move in a square path of 4 meters each side starting at (0,0). Which sequence of commands achieves this?

hard

A. move_right(4)
move_forward(4)
move_left(4)
move_forward(4)

B. move_forward(4)
move_left(4)
move_backward(4)
move_left(4)

C. move_forward(4)
move_right(4)
move_right(4)
move_backward(4)

D. move_forward(4)
move_right(4)
move_backward(4)
move_left(4)

Solution

1. Step 1: Understand square path directions

   A square path means moving forward, then right, then backward, then left, each by the same distance.

2. Step 2: Check each option's sequence

   move_forward(4) move_right(4) move_backward(4) move_left(4) follows forward, right, backward, left by 4 meters each, completing a square back to start.

3. Step 3: Verify final position

   After these moves, the drone returns to (0,0), confirming a square path.

4. Final Answer:

   move_forward(4) move_right(4) move_backward(4) move_left(4) -> Option D

5. Quick Check:

   Square path = forward, right, backward, left [OK]

Hint: Square path: forward, right, backward, left same distance [OK]

Common Mistakes:

• Mixing left and right order
• Not returning to start point
• Using different distances for sides