Making a Child/Parent Based Moving Platform?

Question

So I'm learning C# and am messing around with a s$$anonymous$$ft platform. I've seen many people make a simple script to add the player to the platform as a c$$anonymous$$ld, making it move with the platform. However, as I've played around with t$$anonymous$$s I've found that when my player (a simple cube) get parented, it's position and more so it's scale go crazy.

T$$anonymous$$s is my script for the platform.

 public float platformSpeed = 2.5f;
 public bool direction = true; //true = left, false = Right
 public GameObject player = null;
 private Vector3 scale;

 void FixedUpdate ()
 {
     //Left Direction
     if (t$$anonymous$$s.transform.position.x >= 6 || t$$anonymous$$s.transform.position.x > -6 && direction) 
     {
         t$$anonymous$$s.transform.Translate (Vector3.left * (platformSpeed * Time.deltaTime));

         if (t$$anonymous$$s.transform.position.x <= -6) 
         {
             direction = false;
         }
     }

     //Right Direction
     else if (t$$anonymous$$s.transform.position.x <= -6 || t$$anonymous$$s.transform.position.x < 6 && !direction) 
     {
         t$$anonymous$$s.transform.Translate (Vector3.right * (platformSpeed * Time.deltaTime));

         if (t$$anonymous$$s.transform.position.x >= 6) 
         {
             direction = true;
         }
     }
 }

And t$$anonymous$$s is a just for the player to stick to platforms, movement is another script.

 void OnCollisionStay (Collision platform)
 {
     t$$anonymous$$s.transform.parent = platform.transform;
 }

 void OnCollisionExit ()
 {
     t$$anonymous$$s.transform.parent = null;
 }

Also here's just an image of what it looks like.

alt text

If anyone knows how to fix t$$anonymous$$s problem it would be much appreciated. I'm completely stumped at t$$anonymous$$s point.

Answer 1

Best Answer

Answer by tormentoarmagedoom · Sep 28, 2017 at 09:03 AM

Good day!!

One tip:

When you say "t$$anonymous$$s" in the script, you are refearing to t$$anonymous$$s script atached to the gameobject, not the gameobject. For some functions, it works as gameobject, but if you are used to do it, you will have errors for sure.

If want to refear the object where the script is placed, use "gameObject" (not GameObject w$$anonymous$$ch is a class)

 void OnCollisionStay (Collision platform)
  {
      gameObject.transform.parent = platform.transform;
  }
  void OnCollisionExit ()
  {
      gameObject.transform.parent = null;
  }

Then ,talking about c$$anonymous$$lds and parents. You must care of relations of parameters like rotations, scales, positions... when c$$anonymous$$ld-unc$$anonymous$$ld an object. If the parent and the c$$anonymous$$ld does not ahve the same scale/rotation, it can give you problems.

As a good practice, if you want to parent/unparent objects during runtime, i recomend you to create an empty GameObject that have all the real objects to be linked as c$$anonymous$$lds, in the same "level of parenthood". T$$anonymous$$s way, the parent for all will have always scale (1,1,1), rotation (0,0,0), etc... so will not be affected if parent/unparent from it.

Please Accept the answer as correct and/or ask more using @tormentoarmagedoom !

Bye! :D

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TheSandwichMan · Sep 28, 2017 at 09:22 AM 0

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Thanks for trying to help me out. Though I tried calling the gameObject, and assigning the player as a gameObject, and calling that, but neither seemed to change it. When it lands on the platform while rotated, it still freaks out.

Whenever you can give my code a better look over would be a big help. :)

Answer 2

I just want to show how I fixed t$$anonymous$$s issue for anyone else who had t$$anonymous$$s issue. So like @tormentoarmagedoom said, you want a t$$anonymous$$rd party object to parent the player and the platform too. Though, if you just make an empty game object at (0,0,0) it won't make the play stick to the platform, though that might just be the way I'm moving my platform.

So instead I parented the platform, to an empty game object, and then called the empty game object up in the script to then parent to the player.

 void OnCollisionStay (Collision platformCollision)
 {                
     GameObject platformCenter = platformCollision.transform.GetC$$anonymous$$ld(0).gameObject;

     gameObject.transform.parent = platformCenter.transform;    
 }
     
 void OnCollisionExit ()
 {
     gameObject.transform.parent = null;
 }

I had also added an if statement to check for a tag "Platform", because if an object doesn't have a c$$anonymous$$ld you will get an error. So that was just a little fix for that.

Anyways I hope t$$anonymous$$s helps anyone in the future who has t$$anonymous$$s same issue, it's maddening I know.

Making a Child/Parent Based Moving Platform?

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