23.10.02

Physics.Raycast(Vector3 origin, Vector3 direction, out RaycastHit hitInfo)

using UnityEngine;

public class ExampleClass : MonoBehaviour {

    private RaycastHit hit;

    void Update () 
    {
        if (Physics.Raycast(transform.position, transform.forward, out hit))
        {
            Debug.Log("hit point : " + hit.point + ", distance : " + hit.distance + ", name : " + hit.collider.name);
            Debug.DrawRay(transform.position, transform.forward * hit.distance, Color.red);
        }
        else
        {
            Debug.DrawRay(transform.position, transform.forward * 1000f, Color.red);
        }
    }
}

Physics.Raycast(Vector3 origin, Vector3 direction, out RaycastHit hitInfo, float maxDistance)

using UnityEngine;

public class ExampleClass : MonoBehaviour
{
    // See Order of Execution for Event Functions for information on FixedUpdate() and Update() related to physics queries
    void FixedUpdate()
    {
        Vector3 fwd = transform.TransformDirection(Vector3.forward);

        if (Physics.Raycast(transform.position, fwd, 10))
            print("There is something in front of the object!");
    }
}

Physics.Raycast(Vector3 origin, Vector3 direction, out RaycastHit hitInfo, float maxDistance, int layerMask)

using UnityEngine;

public class RaycastExample : MonoBehaviour
{
    // See Order of Execution for Event Functions for information on FixedUpdate() and Update() related to physics queries
    void FixedUpdate()
    {
        RaycastHit hit;

        if (Physics.Raycast(transform.position, -Vector3.up, out hit, 100.0f))
            print("Found an object - distance: " + hit.distance);
    }
}

Physics.Raycast(Ray ray, out RaycastHit hitInfo, float maxDistance)

using UnityEngine;

public class ExampleClass : MonoBehaviour
{
    // See Order of Execution for Event Functions for information on FixedUpdate() and Update() related to physics queries
    void FixedUpdate()
    {
        Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
        RaycastHit hit;

        if (Physics.Raycast(ray, out hit, 100))
            Debug.DrawLine(ray.origin, hit.point);
    }
}