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Question by conguerror · Jan 27, 2021 at 04:12 PM · collisionraycastraycastingraycasthitray

Raycast goes through

I don't know where is the problem, ray just goes through the wall. Layermask is checked correctly and origin is behind the wall. But it still goes through the cube. I want enemy AI not to shoot if there is a wall. Code:

   public virtual bool SeeingAlligned()
         {
             if (seeingOrigin != null)
             {
                 Ray ray = new Ray(seeingOrigin.position, seeingOrigin.forward*attackDistance);
                 Debug.DrawRay(seeingOrigin.position, seeingOrigin.forward*attackDistance, Color.blue, 2f);
                 return Physics.Raycast(ray, out hit, attackDistance, playerLayermask);
             }
             else
             {
                 Debug.Log("No ray origin for line of sight check");
                 return false;
             }
         }


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avatar image conguerror · Jan 27, 2021 at 04:14 PM 0
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alt text

What is it that I am supposed to do?

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avatar image conguerror · Jan 27, 2021 at 04:16 PM 0
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And yeah it returns true all the time(the code)

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Answer by NPnpNPnpNP · Jan 27, 2021 at 04:46 PM

The problem is in this line :

Physics.Raycast(ray, out hit, attackDistance, playerLayermask);.

In the second screenshot, we can see that you selected the "Default" layer for the wall.

You may want to change playerLayerMask to Physics.AllLayers or if you want to ignore the playerLayerMask, change it to ~playerLayerMask.

Check this link for more details.

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avatar image conguerror · Jan 27, 2021 at 04:59 PM 0
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Now I will check it out

avatar image conguerror · Jan 27, 2021 at 05:06 PM 0
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Yup it worked. But 1 question though. Why should I change that thing? Shouldn't the ray detect only the specific encoded layer?

avatar image NPnpNPnpNP conguerror · Jan 27, 2021 at 05:16 PM 0
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Yes, but if you select the "Player" layer, it will only detect objects of this layer, even if there is a wall in front of it.

Basically, it ignore all objects that are not in the specified layer.

In this example, the ray is going through the wall as if it dont exists, so it will detect the player even if there is a wall between the enemy and the player.

avatar image conguerror NPnpNPnpNP · Jan 27, 2021 at 05:20 PM 0
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Okay,got it, thank you very much

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