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Question by demize2010 · Apr 21, 2011 at 12:44 PM · physicsmathreflection

Reflection Angle - Change objects rotation

Hi guys,

Having some problems getting an object to rotate away from a collision down the angle of reflection. We've tried vector3.reflect but it doesn't seem to be helping us too much.

Does anyone have any good ideas or reference?

Thanks!

-Jack

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Answer by Cyb3rManiak · Apr 21, 2011 at 01:13 PM

No reference I'm afraid, but the basic idea is to use Quaternion.SetFromToRotation along with Vector3.Reflect...

This is guess work on my part about what exactly you want to accomplish, but try this and tweak it to your liking (untested!!! Parts copy paste from old code, parts just made up right now.)

private var hitInfo : RaycastHit; private var fRayDistance : float = 100;

if (Physics.Raycast(v3Origin, v3Direction, hitInfo, fRayDistance, layerMask.value)) { var v3NewDirection: Vector3 = Vector3.Reflect (hitInfo.point - v3Origin.point, hitInfo.normal).normalized; var qNewRotation: Quaternion = SetFromToRotation (hitInfo.normal, v3NewDirection);

 // Do whatever Lerp/Slerp you want...

}

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avatar image demize2010 · Apr 21, 2011 at 08:23 PM 0
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Thanks man, that's quite a neat solution!

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