Limit local rotation

Question

Hi,

i have an issue i am not able to resolve myself. I have looked around topics here, but i couldnt find exactly what i am looking for.

I have an object, which is rotating around its axis, i.e. its orbiting on place. But i need to limit the rotation when it stops. So it means the object can have local y rotation anything between 0 and 360. Lets say its current y rotation is 100. I need to limit in +/- 40 interval. I.e. 60 - 140. Thats not problem, i am clamping it using eulerAngle.y. But when the current rotation is for example 20, then the issue comes up as it the interval is -20 to 60. Which causes issues as the rotation is only 0 - 360. So when the current rotation gets to this break point, whole limit code brakes and it does some funky stuff. Is there anyway how to prevent it from going in 0-360 interval and have negative values for rotation ? Or any other solution ?

Thanks a lot for any reply.

Luke

Answer 1

its a little late, but here my approach:

   m_startRotation = transform.rotation.eulerAngles.y;
   m_minRot = m_startRotation - 90.0f;
   m_maxRot = m_startRotation + 90.0f;
   m_isTranslationNessecary = false;
 
   // check if rotation happens between 0/360
   if(m_minRot <= 0.0f)
    m_minRot += 360.0f;
 
   if(m_maxRot >= 360.0f)
    m_maxRot -= 360.0f;
 
   if(m_minRot > m_maxRot)
    m_isTranslationNessecary = true;

and this function checks if the obj can be rotated:

     private float ClampAngle(float angle, float min, float max, bool isTranslationNecessary)
     {
         if(!isTranslationNecessary)
         {
             if(angle < min )
                 return min;
 
             if(angle > max)
                 return max;
         }
         else
         {
             if(angle > max && angle < min)
             {
                 if(min - angle > angle - max)
                     return max;
                 else
                     return min;
             }
         }
 
         return angle;
     }

Limit local rotation

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