Waypoint radius and acceptance in Drone Programming - Practice Problems & Coding Challenges

Challenge - 5 Problems

❓ Predict Output

intermediate

Waypoint acceptance with radius check

What is the output of this code that checks if a drone has reached a waypoint within a given radius?

Drone Programming

def has_reached_waypoint(drone_pos, waypoint_pos, radius):
    dx = drone_pos[0] - waypoint_pos[0]
    dy = drone_pos[1] - waypoint_pos[1]
    distance_squared = dx*dx + dy*dy
    return distance_squared <= radius*radius

print(has_reached_waypoint((10, 10), (13, 14), 5))

A TypeError

B False

C SyntaxError

D True

💡 Hint

Remember to compare squared distances to avoid costly square root calculations.

The squared distance between (10,10) and (13,14) is 3^2 + 4^2 = 9 + 16 = 25. The radius squared is 5^2 = 25. Since 25 <= 25, the function returns True.

❓ Predict Output

intermediate

Effect of waypoint radius on acceptance

Given this code, what will be the output when the drone is exactly on the edge of the acceptance radius?

Drone Programming

def check_acceptance(drone_pos, waypoint_pos, radius):
    from math import sqrt
    distance = sqrt((drone_pos[0] - waypoint_pos[0])**2 + (drone_pos[1] - waypoint_pos[1])**2)
    return distance < radius

print(check_acceptance((0, 0), (3, 4), 5))

A True

B SyntaxError

C False

D TypeError

💡 Hint

Check the comparison operator used for acceptance.

The distance between (0,0) and (3,4) is 5. The function returns True only if distance < radius, so 5 < 5 is False.

🔧 Debug

advanced

Identify the error in waypoint acceptance logic

This code is supposed to return True if the drone is within the radius of the waypoint. What error will it raise or what is the output?

Drone Programming

def is_within_radius(drone, waypoint, radius):
    distance = ((drone.x - waypoint.x)**2 + (drone.y - waypoint.y)**2)**0.5
    if distance <= radius:
        return True
    else:
        return False

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

print(is_within_radius(Point(1,2), Point(4,6), 5))

A SyntaxError

B False

C True

D AttributeError

💡 Hint

Check the if-else syntax carefully.

The else statement is missing a colon, causing a SyntaxError.

❓ Predict Output

advanced

Waypoint acceptance with 3D coordinates

What is the output of this code that checks if a drone is within a 3D waypoint radius?

Drone Programming

def within_radius_3d(drone_pos, waypoint_pos, radius):
    dx = drone_pos[0] - waypoint_pos[0]
    dy = drone_pos[1] - waypoint_pos[1]
    dz = drone_pos[2] - waypoint_pos[2]
    dist_sq = dx*dx + dy*dy + dz*dz
    return dist_sq <= radius*radius

print(within_radius_3d((1,2,3), (4,6,7), 6))

A False

B True

C IndexError

D TypeError

💡 Hint

Calculate squared distance in 3D and compare with squared radius.

Distance squared is (1-4)^2+(2-6)^2+(3-7)^2 = 9+16+16=41. Radius squared is 36. 41 <= 36 is False, so output should be False.

❓ Predict Output

expert

Dynamic waypoint acceptance with variable radius

What is the output of this code that dynamically adjusts acceptance radius based on drone speed?

Drone Programming

def dynamic_acceptance(drone_pos, waypoint_pos, speed):
    base_radius = 5
    radius = base_radius + speed * 0.5
    dx = drone_pos[0] - waypoint_pos[0]
    dy = drone_pos[1] - waypoint_pos[1]
    dist_sq = dx*dx + dy*dy
    return dist_sq <= radius*radius

print(dynamic_acceptance((0,0), (6,8), 4))

A TypeError

B False

C NameError

D True

💡 Hint

Calculate radius including speed factor and compare squared distances.

Distance squared is 6^2 + 8^2 = 36 + 64 = 100. Radius is 5 + 4*0.5 = 7. Radius squared is 49. 100 <= 49 is False, so output should be False.