Rotation of child objects

I'm doing this game in which two players controls two pirates, and they have to survive from objects falling from the sky while stading on the top of a plank, that works just like a seesaw.



I'm having problems with the rotation of the pirates, they are parented with the plank (seesaw), when the plank rotates they also rotate, however their sprite become stretched as you can see below



If you have some spare time and can help me out, I would be very greatful

 

Hello again, we talked a few days ago. Are you scaling any of those components?? I think what you want to do is have each object on a "clean" part of the hierarchy, NOT scaled. Maybe like so:

Code (csharp):

1. TheBoat (scale (1,1,1))
2. --- TheBoatGraphic (scaled as needed)
3. --- TheSailGraphic (scaled as needed)
4. --- TheSeeSawAttachPoint (scale (1,1,1))
5. ------ TheSeeSawPivotPoint (scale (1,1,1))
6. ---------- The SeeSawGraphic (scaled as needed)
7. ---------- Pirate1 (scaled as needed)
8. ---------- Pirate2 (scaled as needed)

The slewing you see happens when you interleave scaling and rotation and then more scaling going down a hierarchy.

(I snuck in here for some Ninja edits...)

 

Currently your Hierarchy is this:
(A) Plank (SpriteRenderer) <some local scale>
- (B) Pirate (SpriteRenderer)
- (C) Pirate (SpriteRenderer)

And A probably has a local scale set to get the right shape for your plank, right?

Try a hierarchy like this:
(A) Plank (empty) <local scale = (1, 1, 1)
- (B) Pirate (SpriteRenderer) <some local scale>
- (C) Pirate (SpriteRenderer) <some local scale>
- (D) Plank sprite (SpriteRenderer) < some local scale>

 

Hello again, glad you're back

So I'm not sure if I follow you, how can I scale the pivot point and the attach point?

 

I tried to attach all of them to an empty object, but the pirates just stop rotating

 

What's the thing that you are rotating now? The plank, or the empty GameObject? You should rotate the empty object that is now the parent of the plank and the pirates.

 

The issue is that the plank moves because of the hinge joint component, the movement is not scripted, its just phisics. So i tried to put a hinge joint in the empty object, however the pirates and the plank dont rotate along with it, i'm confused with which components from the plank should go to the empty gameobject and which should stay.

The plank has a rigidbody 2d, a hinge joint 2d, a box collider and the sprite renderer

 

Make a fresh scene and do some pivot testing first... you might find that the pirates need a SlidingHinge2D to connect them to the plank, otherwise they'll likely fall through it, or their weight will be unevenly applied to the plank.

Computer physics simulations do not do well with multiple items in close contact and interacting, like sliding along each other, because the solvers try to counter it all and can get jittery, so it is often necessary to help the physics with extra hinges, which might need to be broken when you jump (if you jump), etc.

You can look up tutorials for jumping on moving platforms because that's basically exactly what you're doing here, except you also want the pirate's weight to affect the physics, so it's even more tricky.