Check if circle player is on the ground

[AmirMahmood]

hi

How can I check if a circle is on the ground like picture below ?!

i have roof and wall in my game , so if i check ground collision for all around of circle , it can jump sevral times on walls or roof.

sorry for my bad english.

[coolraiman]

Use box collider (boxCollider2D if your game is in 2D) and give them the name “ground” and align their position and size with your ground surfaces

add a rigibody on your circle and add a script on your circle with something like this exemple

public class ExampleClass : MonoBehaviour {
    void OnTriggerEnter(Collider other) {
        if(collider.name == "ground")
        {
        //do your stuff here
        }
    }
}

[VivienS]

Hey there,

If you’re using simple colliders and

void OnCollision2D (Collision2D collision) {...}

or its 3D counterpart, check out the Collision2D.contacts. It’s an array that contains the exact positions of the collision points in world space. You can transform them easily into local space or just compare them with the world position of your collider (below => probably hit floor, same => probably hit wall, …).

If you’re using a CharacterController, you can check its CollisionFlags to see where the last hit took place.

Cheers.

[wolfenstien98]

If you are using a Character Controller you can use the built in method isGrounded.

Otherwise I would suggest using a RayCast

[Fogwalker]

I think I know you problem… using charactercontroller might not work in your situation although it might.

If you are doing this 2d… watch this video.

If you are doing this in 3d watch the video, but the code will be close to this.

using UnityEngine;
using System;

public class jump : MonoBehaviour
{
// These are the variables for detecting ground

public Transform groundCheck;
public float groundCheckRadius;
public LayerMask whatIsGround;
private bool grounded;

// This is for the jump variables
public float thrust;
public Rigidbody rb;

// Use this for initialization
void Start()
{
    rb = GetComponent<Rigidbody>();
}

// Update is called once per frame
void Update()
{
    grounded = (Physics.CheckSphere(groundCheck.position, groundCheckRadius, whatIsGround));

    if (Input.GetKeyDown("space") && grounded)
    {
        rb.AddForce(Vector3.up * thrust);
    }

}

}