I followed this tutorial and basically I did everything same. However I can’t reach methods inside the testTouch class. Here is TouchInput class:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class touchInput : MonoBehaviour
{
public LayerMask touchInputMask;
private List<GameObject> touchList = new List<GameObject>();
private GameObject[] touchesOld;
private RaycastHit hit;
// Start is called before the first frame update
void Start()
{
}
// Update is called once per frame
void Update()
{
#if UNITY_EDITOR
//same things for unity editor as be shown in tutorial #endif
if (Input.touchCount > 0)
{
touchesOld = new GameObject[touchList.Count];
touchList.CopyTo(touchesOld);
touchList.Clear();
foreach (Touch touch in Input.touches)
{
Ray ray = GetComponent<Camera>().ScreenPointToRay(touch.position);
if (Physics.Raycast(ray, out hit, touchInputMask))
{
GameObject recepient = hit.transform.gameObject;
touchList.Add(recepient);
if (touch.phase == TouchPhase.Began)
{
recepient.SendMessage("OnTouchDown", hit.point, SendMessageOptions.DontRequireReceiver);
}
if (touch.phase == TouchPhase.Ended)
{
recepient.SendMessage("OnTouchUp", hit.point, SendMessageOptions.DontRequireReceiver);
}
if (touch.phase == TouchPhase.Stationary)
{
recepient.SendMessage("OnTouchStay", hit.point, SendMessageOptions.DontRequireReceiver);
}
if (touch.phase == TouchPhase.Canceled)
{
recepient.SendMessage("OnTouchExit", hit.point, SendMessageOptions.DontRequireReceiver);
}
}
}
foreach (GameObject g in touchesOld)
{
if (!touchList.Contains(g))
g.SendMessage("OnTouchExit", hit.point, SendMessageOptions.DontRequireReceiver);
}
}
}
}
and here is testTouch class:
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class testTouch : MonoBehaviour
{
public Color defaultColor; //set manually in the editor
public Color selectedColor; //set manually in the editor
public Material mat;
void Start()
{
mat = this.GetComponent<SpriteRenderer>().material;
// mat.color = selectedColor;
}
void OnTouchDown()
{
mat.color = selectedColor;
Debug.Log("hello");
}
void OnTouchUp()
{
mat.color = defaultColor;
Debug.Log("hello");
}
void OnTouchStay()
{
mat.color = selectedColor;
Debug.Log("hello");
}
void OnTouchExit()
{
mat.color = defaultColor;
Debug.Log("hello");
}
I don’t get any errors and I can’t reach those Debug.Logs as well. When I click the 2Dcircle nothing happens.
I tried on editor and on my android phone. Both of them is not working.
Answer
3D Raycasting (Physics.Raycast()) on a 2D colliders does not work.
Replace 2D circle collider with 3D circle collider.
There is no overload of the Raycast method that takes a layerMask as a third argument.
https://docs.unity3d.com/ScriptReference/Physics.Raycast.html
You are mistakenly calling another overload of the Raycast method.
public static bool Raycast(Ray ray, out RaycastHit hitInfo, float maxDistance = Mathf.Infinity, int layerMask = DefaultRaycastLayers, QueryTriggerInteraction queryTriggerInteraction = QueryTriggerInteraction.UseGlobal);