koobas.hobune.stream
Other
Limit player speed (2D)
Hello, I am prototyping a 2D platforming game for practice. I am working on the player movement and so far I have successfully gotten it to move based on input. However, I am unable to limit the speed. I have tried setting a max speed and changing the velocity to match the max speed if the player's current velocity exceeds the max speed, but that has not been working. Is there a smooth, clean way to limit the max speed? Can I clamp it? If so, how? I am very new to programming, especially when it comes to 2D physics. Thanks in advanced.
Here is my current script:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class PlayerMovement : MonoBehaviour {
public float speed;
public float maxSpeed;
public bool onGround;
public Rigidbody2D playerRB;
private void Start()
{
playerRB = gameObject.GetComponent<Rigidbody2D>();
}
private void FixedUpdate()
{
float x = Input.GetAxis("Horizontal");
playerRB.AddForce((Vector2.right * speed) * x);
}
}
Have a look at this answer.
http://answers.unity3d.com/questions/1035491/how-to-clamp-set-max-value-the-velocity-of-a-2d-ri.html
Welcome to 2D physics, PresidentPorpise :) I ran your code against an old one of mine (stripped down to the basics). When I tested yours, it definitely kept increasing in speed (with speed at 10 and maxSpeed at 15). Acceleration was a bit slow.
For some reason mine has sharper acceleration, and won't accelerate past the set float value. I'm also pretty new, so I'm sure there's a tutorial that could explain more.
using UnityEngine; using System.Collections;
public class MyMovement : MonoBehaviour {
public float maxSpeed = 10f;
private Rigidbody2D rigid2d;
void Start()
{
rigid2d = GetComponent<Rigidbody2D>();
}
void FixedUpdate()
{
float move = Input.GetAxis("Horizontal");
rigid2d.velocity = new Vector2(move * maxSpeed, rigid2d.velocity.y);
Vector2 movement = new Vector2(move, 0);
rigid2d.AddForce(movement * maxSpeed);
}
}
If you're interested in clamping values, use Mathf.Clamp. It's very easy to use, and efficient :) Good luck on your game
actually there is a problem with the above code ... you are setting both velocity and addforce in each fixed update, either set velocity or addforce
Your script has "sharp" acceleration because you set your velocity directly, this also keeps player speed constant.
Try this- if(playerRB.velocity.magnitude>maxSpeed){ playerRB.velocity=playerRB.velocity.normalised*maxSpeed}
