goto() command for navigation in Drone Programming - Step-by-Step Execution

Concept Flow - goto() command for navigation

Start

↓

Call goto(x, y, z)

↓

Calculate path to (x, y, z)

↓

Move drone step-by-step

↓

Check if reached (x, y, z)?

No→Continue moving

Yes↓

Stop movement

↓

End

The drone receives a goto(x, y, z) command, calculates the path, moves step-by-step, checks if it reached the target, and stops when it arrives.

Execution Sample

Drone Programming

goto(10, 5, 3)
// Drone moves from current position to (10,5,3)
// Stops when it reaches the target

This code moves the drone from its current position to coordinates (10, 5, 3) and stops when it arrives.

Execution Table

Step	Current Position (x,y,z)	Target Position (x,y,z)	Distance to Target	Action	Output
1	(0,0,0)	(10,5,3)	Calculated	Start moving towards target	Moving
2	(2,1,0.6)	(10,5,3)	8.7	Continue moving	Moving
3	(5,2.5,1.5)	(10,5,3)	5.9	Continue moving	Moving
4	(8,4,2.4)	(10,5,3)	2.4	Continue moving	Moving
5	(10,5,3)	(10,5,3)	0	Reached target, stop	Stopped
6	-	-	-	End of navigation	-

💡 Drone reached target position (10,5,3), distance is zero, navigation stops.

Variable Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	After Step 4	After Step 5	Final
current_position	(0,0,0)	(2,1,0.6)	(5,2.5,1.5)	(8,4,2.4)	(10,5,3)	(10,5,3)	(10,5,3)
distance_to_target	Calculated	8.7	5.9	2.4	0	0	0
status	Idle	Moving	Moving	Moving	Moving	Stopped	Stopped

Key Moments - 3 Insights

Why does the drone keep moving even when it is close to the target but not exactly there?

Because the distance to target is not zero yet (see execution_table steps 2-4), the drone continues moving until it exactly reaches the target.

What happens when the drone reaches the exact target coordinates?

At step 5 in the execution_table, distance becomes zero, so the drone stops moving and the navigation ends.

Does the drone jump directly to the target position?

No, the drone moves step-by-step towards the target, updating its position gradually as shown in the variable_tracker.

Visual Quiz - 3 Questions

Look at the execution_table, what is the drone's position at Step 3?

A (2,1,0.6)

B (8,4,2.4)

C (5,2.5,1.5)

D (10,5,3)

💡 Hint

Check the 'Current Position' column at Step 3 in the execution_table.

At which step does the drone stop moving?

A Step 4

B Step 5

C Step 3

D Step 2

💡 Hint

Look for the 'Action' column where it says 'Reached target, stop'.

If the drone started at (1,1,1) instead of (0,0,0), how would the distance at Step 1 change?

A It would be smaller

B It would be zero

C It would be larger

D It would be the same

💡 Hint

Distance depends on how far the drone is from the target at start, see variable_tracker for distance changes.

Concept Snapshot

goto(x, y, z) moves the drone to the target coordinates.
The drone moves step-by-step, checking distance each time.
When distance is zero, the drone stops.
Useful for precise navigation in 3D space.

Full Transcript

The goto() command tells the drone to move to a specific point in space. The drone calculates the path and moves step-by-step, updating its position and checking how far it is from the target. It keeps moving until it reaches the exact coordinates, then it stops. This process is shown step-by-step in the execution table and variable tracker, helping beginners see how the drone's position and status change over time.