2D Roguelike player only moves once

Unity Engine
1

Hi everyone! I found numerous posts about this problem but no proposed solutions seem to work for me (or for many others who posted). After much digging/debugging, I’ve narrowed it down the following:

while (sqrRemainingDistance > float.Epsilon) // Epsilon is very small number almost zero.
{
   Vector3 newPosition = Vector3.MoveTowards(rb2D.position, end, inverseMoveTime * Time.deltaTime);
   rb2D.MovePosition(newPosition);
   sqrRemainingDistance = (transform.position - end).sqrMagnitude;
   yield return null; // Which means waiting for a frame before re-evaluating condition of loop.
}

For some reason it’s getting stuck in this loop. sqrRemainingDistance converges to a really small number but never goes beyond that (e.g. 1.856268E-06 in one test run).

EDIT: 2D Roguelike is a Unity made tutorial. I’m following along the videos and compared my code very closely to source and still don’t see the problem. I even cut and pasted source into my code and it still doesn’t work. When running the source stand alone project however, everything works fine.

2

Have you printed out the value of float.Epsilon ? Are you familiar with the exponential notation used for floating point numbers to accommodate their wide dynamic value range?

3

float.Epsilon = 1.401298E-45
Yes, totally familiar with the exponential notation. Just not sure why I’m not seeing sqrRemainingDistance approach epsilon (or zero) … why does it converge to a number other than zero, albeit a small one.

Also, I realize I didn’t make my question totally clear: 2D Roguelike is a Unity made tutorial. I’m following along the videos and compared my code very closely to source and still don’t see the problem. I even cut and pasted source into my code and it still doesn’t work. When running the source stand alone project however, everything works fine.

4

Seems like an unnecessarily complicated way to move something … maybe it’d be easier to just re-write it?

1 Like
5

You’re probably right. Maybe I’m more confused than anything … why does it work in one person’s code but not mine?? Alas, moving on!

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6

Only the coding Gods know the answers

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7

There should be a few of those around here. Hopefully one of them graces us with their presence :stuck_out_tongue:

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8

Solved: under player rigidbody 2D component, I had body type as dynamic instead of kinematic. Changing that solved the problem. Sorry all … newb mistake!!

9

Don’t think it was your fault, tbh I think it was just bad code that you were given

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