Question Why does the rotation change?

If I use this code:

Code (CSharp):

1. weaponDrawn = false;
2.  
3. private void Update()
4.     {
5.         if (!weaponDrawn)
6.         {
7.             DrawingWeapon();
8.         }
9.     }
10.  
11. private void DrawingWeapon()
12.     {
13.         if (Input.GetKeyDown("r"))
14.         {
15.             Instantiate(weapon, new Vector3(transform.position.x + 0.45f, transform.position.y + 0.12f, 0), Quaternion.Euler(0, 0, 0), rightHand.transform);
16.             weaponDrawn = true;
17.         }
18.     }

It doesn't have the wrong rotation, but if I use this code:

Code (CSharp):

1. weaponDrawn = false;
2.  
3. private void Update()
4.     {
5.         if (!weaponDrawn)
6.         {
7.             DrawingWeapon();
8.         }
9.     }
10. private void DrawingWeapon()
11.     {
12.         Instantiate(weapon, new Vector3(transform.position.x + 0.45f, transform.position.y + 0.12f, 0), Quaternion.Euler(0, 0, 0), rightHand.transform);
13.         weaponDrawn = true;
14.     }

The instantiated game object is rotated 45(ish) degrees.

Why does this happen?

 

Update:

For some reason, if I wait a little bit, the second code doesn't have any rotation.

Why does it change depending when the code is activated?

 

No human being should ever have to deal with a line of code like that.

If you have more than one or two dots (.) in a single statement, you're just being mean to yourself.

How to break down hairy lines of code:

http://plbm.com/?p=248

Break it up, practice social distancing in your code, one thing per line please.

"Programming is hard enough without making it harder for ourselves." - angrypenguin on Unity3D forums

"Combining a bunch of stuff into one line always feels satisfying, but it's always a PITA to debug." - StarManta on the Unity3D forums

As to the actual problem, all about Euler angles and rotations, by StarManta:

https://starmanta.gitbooks.io/unitytipsredux/content/second-question.html