Line of sight detection 3D,Line of sight detection

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I looked around, but all answers are too complex for my needs.

I have a sphere called RollerAgent, and a cube called Target. If there is no object between the straight line from the Sphere to the Cube I want the boolean to return true. I tried searching the internet, but all the answers were too complex for my needs.

I have a sphere called RollerAgent, which I can roll around, and a cube called target which I want to detect.

I simply need for when there is not an object between the sphere and the cube, a boolean to return true.

1 Answer

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using System.Linq;
using UnityEngine;

public class LineOfSightTester : MonoBehaviour
{
	[SerializeField] Collider[] _collidersToIgnore = new Collider[0];
	[SerializeField] Transform _P0, _P1;

	void Update ()
	{
		Vector3 p0 = _P0.position;
		Vector3 p1 = _P1.position;
		bool result = IsLineSegmentFreeOfColliders( p0 , p1 , _collidersToIgnore );
	}

	static bool IsLineSegmentFreeOfColliders ( Vector3 p0 , Vector3 p1 , Collider[] ignored )
	{
		var hits = Physics.RaycastAll( p0 , p1-p0 );
		foreach( RaycastHit hit in hits )
		{
			Collider hitCollider = hit.collider;
			if( !ignored.Contains(hitCollider) )
			{
				Debug.DrawLine( p0 , hit.point , Color.red );
				return false;
			}
		}
		Debug.DrawLine( p0 , p1 , Color.white );
		return true;
	}

}