Noob raycast help.

Questions & Answers
1

Hey.
Im making a terraria like game. I have never used raycasts before and went ahead and tried to write a script for when the player is hitting a block. Here it is:
using UnityEngine;
using System.Collections;

public class HitRay : MonoBehaviour {

	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () {
        if (Input.GetMouseButton(0))
        {
            Vector3 ray = Input.mousePosition;
            if (Physics.Raycast(transform.position, ray, 5))
            {
                print("Hit something");
            }
        }

    }
}

How would i get something like this to work?

2

This will start you going

void Update () {

    Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
    RaycastHit hit;
    if(Physics.Raycast(ray, out hit)) {
          Debug.Log("Mouse hits gameObject '"+hit.collider.gameObject.name+"'");
    }
}
3

I believe your direction parameter should be Input.mousePosition - transform.position. Indeed the direction parameter is relative to transform.position.

Also it would be better to add the layer mask parameter so the ray cast only try to hit specific layers.

4

FIXED.

Physics.raycast doesnt work with 2D. Use Physics2D.raycast instead :smiley: