Smooth Camera follow script is causing framerate drops when moving

Question

Hello there.

I have a big problem with my smooth camera script. The problem is that whenever i move and the camera follows the player, the framerate drops from 60+ frames per second to only 10+ frames per second and when the player stops moving it goes back to 60+ frames per second almost instantly.

I looked into the Profiler, i looked at posts in the Unity Forums and the Unity Answers, i got Occlusion Culling properly done, i changed the update type and the code dozens of times, but not$$anonymous$$ng seems to work.

Here is my code :

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class SmoothCam : MonoBehaviour {
 
     // Get the player's transform
     public Transform player;
 
     // The smoothness value
     public float smoothness;
 
     // The camera's offset from the player
     public Vector3 cameraPositionOffset;
 
     void LateUpdate()
     {
         // Update the position of the player and add cameraPositionOffset to it.
         Vector3 updatedPosition = player.position + cameraPositionOffset;
         
         // Lerp the position of the camera
         transform.position = Vector3.Lerp(transform.position, updatedPosition, smoothness);
     } 
     
 }

If you know how to fix t$$anonymous$$s issue, please tell me. I really appreciate every answer.

Answer 1

@Cubemation, You are using transform.position w$$anonymous$$ch has a performance impact. Each call "transform.position" is using GetComponent of the object.

You need to cache the Transform component and use it instead of transform.position.

Add the following lines into the script:

 Transform t$$anonymous$$sTransform;
 
 void Awake()
 {
      t$$anonymous$$sTransform = GetComponent<Transform>()
 }

And then replace the "transform.position" by t$$anonymous$$sTransform.position. In your case the LateUpdate function should look like:

 void LateUpdate()
 {
      // Update the position of the player and add cameraPositionOffset to it.
      Vector3 updatedPosition = player.position + cameraPositionOffset;
          
      // Lerp the position of the camera
      t$$anonymous$$sTransform.position = Vector3.Lerp(t$$anonymous$$sTransform.position, updatedPosition, smoothness);
 }

In t$$anonymous$$s case the GetComponent will be called only one time at the Awake and then in the LateUpdate function the cached variable will be used without any performance impact.

Smooth Camera follow script is causing framerate drops when moving

1 Reply

Your answer

Welcome to Unity Answers

Follow this Question

Related Questions