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Question by Jan_Julius · Sep 10, 2014 at 01:08 PM · rotationraycastrotate

Raycast not rotating with object / always have raycast ray a certain way no matter what?

Currently this happens in Unity.

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How can I accomplish this?

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Answer by Shane8th · Sep 10, 2014 at 01:18 PM

Have you tried using -Vector3.up?

Example something like this, Physics.Raycast (objectPosition, -Vector3.up, out hit, 50.0f);

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avatar image Jan_Julius · Sep 10, 2014 at 01:25 PM 0
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I just have, this doesn't do the job, remember wherever the object is rotating the raycast has to be cast from the 0 axis of the object, or downward as long as the raycast doesnt move from where it originally was.

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Answer by Owen-Reynolds · Sep 10, 2014 at 03:34 PM

This isn't a raycast issue. It's really about local vs. world coords. Raycasts fire whichever direction you ask, so you have to know how to ask for a certain direction.

transform.forward spins with the player. So if you use it for a raycast direction, the raycast will spin with you. It's known as your "local" forward. Vector3.down, as Shane suggests, is always real world down; doesn't spin with you; so doesn't care which way you're facing.

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avatar image Jan_Julius · Sep 16, 2014 at 12:05 PM 0
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Thanks for your response, I used it but forgot to actually respond, thanks for the comment I accepted his answer however because he explained it to me but you just made it a lot more clear.

Thank you, appreciate it. :).

avatar image Chico3001 · Apr 13, 2019 at 12:55 AM 0
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You really saved me hours of debugging, thanks bro!!

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