error CS0120: An object reference is required for the non-static field, method, or property 'Camera.ScreenToWorldPoint(Vector3)'

오리키우기 디버깅 하다가 발견한 버그이다.

Camera.ScreenToWorldPoint 메서드에서 해당 에러가 났는데, 

 Camera.main.ScreenToWorldPoint 로 바꾸니깐 잘된다^___^

참고: https://answers.unity.com/questions/947643/camerascreentoworldpoint-error-cs0120.html

Camera.ScreenToWorldPoint error CS0120 - Unity Answers