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Question by
italoha · Nov 06, 2019 at 05:07 PM ·
raycastingfaces
Rotate transform to any touched surface
Can I achieve something like this only with raycasts?
I need to place a quad parallel to a touched face by the user.
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Best Answer
Answer by BastianUrbach · Nov 06, 2019 at 09:56 PM
Physics.Raycast can output a RaycastHit, which has a normal field that contains the direction of the surface that was hit (as a vector perpendicular to it). You can then use Quaternion.LookRotation to determine the rotation of the quad.
Kinda like this:
RaycastHit hit; if (Physics.Raycast(ray, out hit)) { quad.position = hit.point; quad.rotation = Quaternion.LookRotation(hit.normal, Vector3.up); }
Depending on which way your quad is facing, you might need to flip the normal vector.