koobas.hobune.stream
Weird velocities (bug?) when moving character in unity 2D,
So i'm trying to make simple platformer in unity 2020.2.2f1. I made a character controller but it doesn't work properly. Even though player jumps and moves in every direction there is something weird going on. It all started when i tried implementing jumping. I use addforce for jumping and when player is falling he sometimes falls through ground for a second, creating bouncy effect. it's really weird. I tried changing collsion mode to continous and basically everything i could find but nothing works. What i found out is velocities of player are acting really weird. Their value sometimes is equal to billions below zero. I forgot to mention that i'm using simplified version of Brackeys movement script ( without crouching etc).For all this weird behaviors i blame Vector3.SmoothDamp but i don't have much experience. Here is the code :
.
using System.Collections; using System.Collections.Generic; using UnityEngine;
public class Movement : MonoBehaviour {
public float speed = 0.01f;
public float JumpForce = 2f;
private Vector3 velocity = Vector3.zero;
void Start()
{
}
void FixedUpdate()
{
Rigidbody2D rb = GetComponent<Rigidbody2D>();
if (Input.GetKeyDown(KeyCode.Space))
{
rb.AddForce(Vector2.up * JumpForce, ForceMode2D.Impulse);
}
float horizontal = Input.GetAxisRaw("Horizontal");
Vector3 targetVelocity = new Vector2(speed * horizontal, rb.velocity.y);
rb.velocity = Vector3.SmoothDamp(rb.velocity, targetVelocity, ref velocity, 0.3f);
}
private void Update()
{
Rigidbody2D rb = GetComponent<Rigidbody2D>();
if (Input.GetKeyDown(KeyCode.Space))
{
rb.AddForce(Vector2.up * JumpForce, ForceMode2D.Impulse);
}
}
} ,
Hi. I'm not sure if this helps you, but I have a suggestion: create a physics material 2d and change the bounciness to 0. Then assign that physics material 2d to your rigidbody2d. Also, you should use FixedUpdate only for physics(raycasts...), not for movement. You should implement the movement in Update. A tip for optimization: use Rigidbody2D rb = GetComponent(); in Start because you're assigning that rigidbody2d every frame. Also, you are jumping in both FixedUpdate and Update and that may cause the issue too. Jump only in Update.
@GDGames0302 I did what you said and nothing changed, i even tried removing smoothdamp part but it's still same. Everything is acting really weird, not really sure why. Just found out that angular velocity is broken too. it's changing to few billions below zero just like other velocities. When player is standing, there is this weird wave effect of pixels moving upwards and everything else is as werid as it was.
