Raycast hits everything even when pointed at the sky

No matter what I point at the raycast always comes back a "hit". Anyone know why?

Code (CSharp):

1. using Oculus.Platform.Models;
2. using Oculus.Platform.Samples.VrHoops;
3. using Pixyz.Utils;
4. using System.Collections;
5. using System.Collections.Generic;
6. using System.Linq;
7. using UnityEngine;
8.  
9. public class Measure : MonoBehaviour
10. {
11.     //set up rays to represent hand to measurement point and point to point
12.     public LineRenderer lrMeasure2;  //Ray from hand to point of measurement
13.     //public LineRenderer Ray;    //Line showing point 1 to point 2
14.  
15.     //troubleshooting objects to determine if button pressed while in game
16.     public GameObject[] objects;
17.     private bool blActive;
18.  
19.     // Set up x,y,z to report on screen
20.     private float flX;
21.     private float flY;
22.     private float flZ;
23.  
24.     //turn line on/off
25.     private bool blLineActive =false;
26.  
27.     //get right hand position
28.     public Transform trfmRightHand;
29.  
30.     // store input from right hand trigger
31.     private bool blHandRight;//= OVRInput.Get(OVRInput.Axis1D.SecondaryIndexTrigger);
32.  
33.     // Start is called before the first frame update
34.     void Start()
35.     {
36.         //Set up line render
37.         Vector3[] v3StartLinePosition = new Vector3[2] { Vector3.zero, new Vector3(0,0,100)};
38.         //v3StartLinePosition[1].Scale(Vector3.forward, new Vector3(0,0,100));
39.         lrMeasure2.SetPositions(v3StartLinePosition);
40.         lrMeasure2.enabled = false;
41.     }
42.  
43.     // Update is called once per frame
44.     void Update()
45.     {
46.         //string strTemp;
47.  
48.         //Run routine if right trigger button is pressed
49.         blHandRight = OVRInput.GetDown(OVRInput.Button.SecondaryIndexTrigger);
50.  
51.         if (blHandRight)
52.         {
53.             blLineActive = true;
54.             lrMeasure2.enabled = true;
55.             Debug.Log("Right Trigger Pressed");
56.         } else
57.         {
58.             lrMeasure2.enabled = false;
59.             blLineActive = false;          
60.         }
61.  
62.         if (blLineActive)
63.         {
64.             //get point data
65.             RaycastMeasure();
66.  
67.             for (int i = 0; i < objects.Length; i++)
68.             {
69.  
70.                 blActive = !objects[i].activeSelf;
71.                 objects[i].SetActive(blActive);
72.  
73.             }
74.         }
75.     }
76.  
77.     private void RaycastMeasure()
78.     {
79.         RaycastHit rchHit;
80.  
81.         //get position of hit on the mesh
82.         if (Physics.Raycast(trfmRightHand.position, trfmRightHand.forward, out rchHit))
83.         {
84.                 flX = rchHit.point.x;
85.                 flY = rchHit.point.y;
86.                 flZ = rchHit.point.z;
87.  
88.                 Debug.Log(flX.ToString()+ ", "+flY.ToString()+", "+flX.ToString());
89.  
90.         }
91.     }
92. }

 

Print out the name of what it's hitting.

 

Add a range to the raycast arguments

 

Thanks. Turns out I'm hitting the object it's attached to. Any ideas how to fix that?

 

A couple main ways:

1. Make sure the ray starts outside of any colliders of the source object
2. Use a layermask which exclude the source object's layer.

 

Debug.Log() wins again!

As Praetor above noted, two good reasons. Let me add this:

3. Disable the collider on the thing you're casting from, then flip it back on afterwards.

 

Got the layermask method working. Thanks!