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Question by JackieTilley92 · Jan 20, 2016 at 06:38 PM · 2d rotation angle rotate object quaternions

Rotating 2D sprite to match surface.

Hi, I am having a problem involving the rotation of a 2D circle sprite.

The objective is to rotate the circle so that the base of it is matches a specified point of contact with the surface that it is on*(I have this point)*. The program taking into account the circle can be at a random rotation before making this adjustment.

I am new to rotating objects in unity and have been experimenting with euler angles/quarternions but no luck. Any suggestions one what I could do to achieve this?

Thank you in advance, Jack

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hexagonius · Jan 20, 2016 at 09:53 PM 0

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can you visually demonstrate what you mean?

Al_Goyle · Jan 20, 2016 at 11:27 PM 0

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Depending on what you want to do, it could be useful to retrieve the normal of the surface point (with a raycast for example).

The normal is a direction. You can then rotate your circle towards this direction.

Some useful threads for that: http://answers.unity3d.com/questions/654222/make-sprite-look-at-vector2-in-unity-2d-1.html http://answers.unity3d.com/questions/585035/lookat-2d-equivalent-.html

I've made an assumption on what it is you want to do... if you could be more precise it would help to answer.