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Question by zero3growlithe · Nov 13, 2011 at 01:22 PM · rotationobjectraycastingfollow

How to make two rays with different offset follow objects rotation?

I have an object with 2 rays with an different offset: one ahead and one on the back of this object. This object rotates on Y-axis and it needs those 2 rays follow his rotation (that is, one on back must be always be on its back and the one ahead... always ahead). How do i do that? My code:

     var offset1 = Vector3(0,0,0.5);
     var offset2 = Vector3(0,0,-0.5);
     var dir1 = Vector3(0,-1,0.5).normalized;
     var dir2 = Vector3(0,-1,-0.5).normalized;
     var RayLenght : float = 0.2;
    
  function FixedUpdate(){
     if (Physics.Raycast (transform.position + offset1, transform.forward + dir1, RayLenght)){
         transform.Rotate (Vector3 (-0.1,0,0));
     }
     if (Physics.Raycast (transform.position + offset2, transform.forward + dir2, RayLenght)){
         transform.Rotate (Vector3 (0.1,0,0));
     }
 }

Or if someone have better idea of keeping an object parallel to track whole time i would be grateful :)

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Answer by syclamoth · Nov 13, 2011 at 01:26 PM

If you want to make a direction be relative to a given transform, use

 actualDir = transfom.TransformDirection(localDir);

This will give you the correct direction at any given time. If you also need the Offset to be relative to the transform, use

 actualOffset = transform.TransformPoint(localOffset);

Both of these return Vector3 which can be used in raycasting as you need.

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avatar image zero3growlithe · Nov 13, 2011 at 02:05 PM 0
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It worked, big thanks! \^.^

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