Rotate Script - abnormal behavior ?

Unity Engine
1

I want to rotate by 90 degrees every two seconds.

var rotate:float;
var one=true;

function Update()
{
	Rotate1();
}

function Rotate1() 
{
	if(one==true)
	{
	one=false;
		rotate +=90;
		transform.Rotate(0,rotate,0);
		yield WaitForSeconds (2);
	one=true;
	}
}

I want: – I see in Inspector.Transform.Position.Y
90 – 90.00001
180-- 270
270-- 180
360-- 270
450-- 90.00002
540—9.659347e-06

I have a question:

  • Why turnover is 90 degrees?
  • Why the addition of 90 degrees occurs 0.00001?
  • Why two seconds breaks are preserved only freely?

Thanks for reply

2

transform.Rotate rotates the object to current rotation + rotate.

current rotation + rotate

  1. 0 + 90 = 90
  2. 90 + 180 = 270
    3 270 + 270 = 180, considering the wrap at 360° where it goes back to 0°

Your questions

  1. I dont understand
  2. That may becaused by float imprecision during the computation
  3. I dont understand
3

Thanks for reply.
I change script:

var rotate:float;
var one=true;

rotate=90;

function Update()
{
	Rotate1();
}

function Rotate1() 
{
	if(one==true)
	{
	one=false;		
		transform.Rotate(0,rotate,0);
		yield WaitForSeconds (2);
	one=true;
	}
}

now working very well.

but 0+90 is 90 I have 90.00001
what is 0.00001

4

As Arterie said, it’s

5

thanks for the explanation rotation.

I want change this red position on image.

Script:

transform.rotation.y=90;

but I have 178.7268

6

transform.rotation is a Quaternion… to get a 90 degree change you need to look at the Euler function

7

transform.rotation is a Quaternion, while in Inspector you see EulerAngles. use transform.eulerAngles in your scrip, and note that Unity modifies your rotation values sometimes to make sure it does not get Gimble-Locked (seach gimble lock on youtube for a better understanding).

8 
transform.eulerAngles.y=90;

Thanks now it work.