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Question by mnarimani · Aug 24, 2017 at 07:24 PM · c#rotationgameobjectrotation axistransform.rotation

how to point the positive Y axis of an object to a direction

Hey. I'm trying to figure it out how to point the positive side of a game object to a direction. any help would be appreciated, this is the code that I'm currently using:

 //naming the gameobject
 GameObject zPathHolder = new GameObject(z > 0 ? "+Z Path Holder" : "-Z Path Holder");
 //assigning the parent
 zPathHolder.transform.SetParent(tempGO.transform);
 //calculating the world positioni of the holder
 Vector3 holderPosition = new Vector3(x * 10, y * 10, z * 10 + z * 5f);
 //direction from center of the current block to the holder position
 Vector3 dir = holderPosition - tempGO.transform.position;
 //the rotation of the path holder
 Quaternion holderRotation = Quaternion.LookRotation(dir, zPathHolder.transform.right);
 //assigning the world position
 zPathHolder.transform.position = holderPosition;
 //assigning the rotation
 zPathHolder.transform.rotation = holderRotation;

but it doesn't work as expected, how can I fix it?

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avatar image NoseKills · Aug 24, 2017 at 08:14 PM 1
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What's going wrong with that code and which way are you trying to point the object's positive y ?

 Quaternion.LookRotation(positiveZ, positiveY);

should work as such

avatar image mnarimani NoseKills · Aug 25, 2017 at 02:57 PM 0
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This is what I'm trying to achieve: alt text

the red dots are path holders and the blue dots are blocks (their position is used in the code by "tempGO")

this is what I get when I use the code that I posted: alt text

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Answer by NoseKills · Aug 28, 2017 at 06:09 AM

And you want the positive Y to point where the positive Z is pointing there?

Just switch the parameters around in your LookRotation

 Quaternion holderRotation = Quaternion.LookRotation(zPathHolder.transform.right, dir);

The second parameter literally is where the positive Y will point as explained in the manual

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avatar image mnarimani · Aug 28, 2017 at 07:03 AM 0
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that worked, thanks!

avatar image NoseKills mnarimani · Aug 29, 2017 at 10:05 PM 0
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In that case please accept the answer so this question becomes marked solved

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