unity raycast2d code example

Example 1: raycasthit2d unity

RaycastHit2D hit = Physics2D.Raycast(transform.position, -Vector2.up);

Example 2: raycast unity

RaycastHit hit;
        // Does the ray intersect any objects excluding the player layer
        if (Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), out hit, Mathf.Infinity, layerMask))
        {
            Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * hit.distance, Color.yellow);
            Debug.Log("Hit");
        }
        else
        {
            Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * 1000, Color.white);
            Debug.Log("No Hit");
        }

Example 3: unity raycast 2d

using UnityEngine;public class Example : MonoBehaviour
{
    // Float a rigidbody object a set distance above a surface.    public float floatHeight;     // Desired floating height.
    public float liftForce;       // Force to apply when lifting the rigidbody.
    public float damping;         // Force reduction proportional to speed (reduces bouncing).    Rigidbody2D rb2D;
    void Start()
    {
        rb2D = GetComponent<Rigidbody2D>();
    }    void FixedUpdate()
    {
        // Cast a ray straight down.
        RaycastHit2D hit = Physics2D.Raycast(transform.position, -Vector2.up);        // If it hits something...
        if (hit.collider != null)
        {
            // Calculate the distance from the surface and the "error" relative
            // to the floating height.
            float distance = Mathf.Abs(hit.point.y - transform.position.y);
            float heightError = floatHeight - distance;            // The force is proportional to the height error, but we remove a part of it
            // according to the object's speed.
            float force = liftForce * heightError - rb2D.velocity.y * damping;            // Apply the force to the rigidbody.
            rb2D.AddForce(Vector3.up * force);
        }
    }
}

Example 4: raycast2d

RaycastHit2D hit = Physics2D.Raycast(origin, direction, distance, layerMask, minDepth, maxDepth);

Example 5: unity3d raycast

using UnityEngine;

// C# example.

public class ExampleClass : MonoBehaviour
{
    void Update()
    {
        // Bit shift the index of the layer (8) to get a bit mask
        int layerMask = 1 << 8;

        // This would cast rays only against colliders in layer 8.
        // But instead we want to collide against everything except layer 8. The ~ operator does this, it inverts a bitmask.
        layerMask = ~layerMask;

        RaycastHit hit;
        // Does the ray intersect any objects excluding the player layer
        if (Physics.Raycast(transform.position, transform.TransformDirection(Vector3.forward), out hit, Mathf.Infinity, layerMask))
        {
            Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * hit.distance, Color.yellow);
            Debug.Log("Did Hit");
        }
        else
        {
            Debug.DrawRay(transform.position, transform.TransformDirection(Vector3.forward) * 1000, Color.white);
            Debug.Log("Did not Hit");
        }
    }
}