The provided code calculates the desired change in velocity for...

The provided code calculates the desired change in velocity for a rigidbody, typically used for some form of movement adjustment in a physics-based context (e.g., steering an object towards a specific aimpoint). Here's a breakdown of what it does line by line:

1. (aimpoint - rb.transform.GlobalPosition()):

   • The code calculates the vector from the rigidbody's current global position (rb.transform.GlobalPosition()) to the aimpoint. This vector represents the direction and distance the rigidbody needs to move to reach the desired aimpoint.

2. / Mathf.Max(0.001f, Time.fixedDeltaTime):

   • It divides the position difference by Time.fixedDeltaTime (the fixed time step for the physics engine, provided by Unity).
   • Mathf.Max(0.001f, Time.fixedDeltaTime) ensures that the divisor is never less than 0.001 to prevent division by zero or unrealistically high velocities due to very small time steps.
   • This division calculates the velocity required to move from the current position to the aimpoint in the next physics update.

3. - rb.velocity:

   • Subtracting the current velocity of the rigidbody (rb.velocity) gives the required "change in velocity" to achieve the desired velocity that moves the object towards the aimpoint.

Purpose of the Code

The variable desiredVelChange represents the change in velocity needed for the rigidbody to move towards the aimpoint within the current fixed physics timestep, accounting for the object's current velocity. This value could be used to apply forces or impulses (e.g., in a physics-based controller) to adjust the object's velocity toward the target aimpoint.