koobas.hobune.stream
How to change the color of a UI cross hair using Raycasts
Hello, I need help with a certain problem I am having with Unity 5. I have created a raycasting script in C# that simply allows me to destroy a certain object under the tag, "Objects".
I have also imported a custom UI cursor that I want the color changing of, through bool animations, when a certain object is being hovered over.
using UnityEngine;
using System.Collections;
public class CursorChange : MonoBehaviour {
public float distanceToSee;
RaycastHit hit;
Animator anim;
// Use this for initialization
void Start () {
anim = GetComponent<Animator> ();
Cursor.visible = (false);
anim.SetBool ("hasHit", false);
}
// Update is called once per frame
void Update ()
{
if(Physics.Raycast(this.transform.position, this.transform.forward, out hit, distanceToSee))
{
if(hit.collider.tag == "Objects")
{
anim.SetBool ("hasHit", true);
}
}
}
}
There are no compiler errors from this script yet the desired results are still not showing. Can anybody help?
Where's this script attached?
Even if you have this on your camera, there's not really a 1-1 relation between directly forward from your camera and where the screen is.
To find out what you're looking at, use Camera.ScreenPointToRay - it creates a ray from the camera to the screen coordinates you input.
So, if you're using a free mouse, you want something like:
Ray ray = Camera.ScreenPointToRay(Input.MousePosition);
if(Physics.Raycast(ray, out hit, ...)
If you're using mouse look, you'll want to use the center of the screen instead:
Ray ray = Camera.ScreenPointToRay(new Vector3(Screen.width / 2, Screen.height / 2, 0));
if(Physics.Raycast(ray, out hit, ...)
Good luck!
