How to get closest point between a collider and a ray/vector that doesn't intersect?

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I'm making a big laser that use CircleCast to detect collision with objects. And I use LineRenderer to render the laser, a ParticleSystem to render the hit effect. The problem is, if I set the Line's end point at the hit.point from CircleCast, the laser snaps to a weird angle that is not parallel with the gun's direction. alt text

How do I get the desired point from this?

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Answer by Klarzahs · Oct 21, 2020 at 12:45 PM

Hi @cdr9042,

what you are looking for is called vector projection, have a look at this post at wikipedia.

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cdr9042 · Oct 22, 2020 at 09:49 AM 0

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Thank you for the direction, I've figured it out

     Vector3 toTarget = Vector3.Project((Vector3)hit.point - transform.position, ShootDirection);
     hitPos = transform.position + toTarget;

How to get closest point between a collider and a ray/vector that doesn't intersect?

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