Instantiate at a position is sometimes instantiating at the wrong position

Question

Hi I've run into an issue I've never experienced before, I'm trying to instantiate a GameObject at the position of an empty child GameObject. Here is the code I'm using:

 using UnityEngine;
 using System.Collections;
 
 public class ShootTeleporter : MonoBehaviour {
 
     private bool isShot = false;
     private GameObject currentTeleporter;
 
     public GameObject teleporter;
     public float shootSpeed;
 
     // Use this for initialization
     void Start()
     {
     
     }
     
     // Update is called once per frame
     void Update()
     {
 
         if(Input.GetMouseButtonDown(0))
         {
             if(!isShot)
             {
                 FireTeleporter();
             }
             else
             {
                 TeleportToTeleporter();
             }
         }
 
     }
 
     void FireTeleporter()
     {
         Instantiate(teleporter,transform.position,Quaternion.identity);
     }
 
     void TeleportToTeleporter()
     {
 
     }
 }

This script is attached to the GameObject whose position I want to instantiate at. Most of the time however, the object's spawn point y position is way below where it should be. Every now and then though, it will spawn at the correct position. Another thing to mention, over time, the incorrect spawn position lowers even further in the y direction. I have no idea what is going on. Here is a picture.

alt text

Answer 1

Answer by Nathaniel_Alcala · Apr 05, 2020 at 04:21 PM

Hi @GregoryNeal ,

We have similar problems and here is how I fixed mine:

I noticed that when I instantiated at a point not under my player it works fine.

I tried turning off my player's gravity under its rigidbody because I thought gravity was affecting it.

Turns out it was fixed so I guess you should try turning off the rigidbody under your player.

I hope this helps. Cheers.

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Answer 2

Answer by EpicCrownKing · Jul 28, 2019 at 03:22 AM

Make sure the prefab's Y value is set to 0. Even though it sounds simple, this messes up quite a bit of code. Hope this helps.

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Alicorne · Jul 28, 2019 at 04:21 AM 0

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This y value is set to 0, it's not this. The problem comes from the child attached to my players gun (witch moves in derection of my cursor using inverse kinematics). I want to instantiate a bullet at this position everytime I click. The value of the y position of this child attached to the gun contynusly goes down but sometimes (maybe one of ten) the bullet will instantiate at the correct position. I checked the position with debug.log(gunCanon.transform.position.y) everytime I click and it give me something like this (let's say the correct position is 10): 10 - 9.85 - 9.74 - 9.62 - 9,35 - 9.1; 10 (correct position) then again it goes down : 8.85 - 8.62... I hope this is understandable, english is not my primary language. And if I look the child object in my scene it still stays at the end of the gun canon. I really don't understand why it act like this.

Instantiate at a position is sometimes instantiating at the wrong position

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