need explanation for this formula

[mzvast]

As in this part in ArriveBehavior.

70 :            let speed = distance / deceleration;
71 : 
72 :            // make sure the speed does not exceed the max
73 : 
74 :            speed = Math.min( speed, vehicle.maxSpeed );

here in line 70 the unit of speed is m/s, the unit of distance is m, the unit of deceleration is m/(s^2). So in the aspect of units, left part we get m/s, however, right part gives s^2, which apparently not equal.

So, am I wrong anywhere? Thanks~

[Mugen87]

The computation in line 70 is physically incorrect. It's just an aproximation. deceleration is not meter per second squared in this case but just undefined. The idea is to compute a decreased speed with a simple computation.

[mzvast]

So its meaning is similar to what the SLOW DOWN RADIUS as in this one 🤔

[Mugen87]

This computation looks similar, yes.

[Mugen87]

You can read more about Yuka's Arrive implementation in Programming Game AI by Example, Chapter 3 (Steering Behavior, Arrive).