Чтобы преобразовать Vector3 в кватернион в Unity, вы можете использовать несколько методов. Вот несколько подходов:

Метод 1: Quaternion.LookRotation

Vector3 direction = Vector3.forward; // Replace with your Vector3
Quaternion quaternion = Quaternion.LookRotation(direction);

Метод 2: Quaternion.Euler

Vector3 eulerAngle = new Vector3(45f, 90f, 0f); // Replace with your Vector3
Quaternion quaternion = Quaternion.Euler(eulerAngle);

Метод 3: Quaternion.FromToRotation

Vector3 fromDirection = Vector3.up; // Replace with your Vector3
Vector3 toDirection = Vector3.forward; // Replace with your Vector3
Quaternion quaternion = Quaternion.FromToRotation(fromDirection, toDirection);

Метод 4: Quaternion.Slerp

Vector3 startDirection = Vector3.right; // Replace with your Vector3
Vector3 endDirection = Vector3.up; // Replace with your Vector3
float t = 0.5f; // Replace with the interpolation value between 0 and 1
Quaternion quaternion = Quaternion.Slerp(Quaternion.LookRotation(startDirection), Quaternion.LookRotation(endDirection), t);

Метод 5: Quaternion.Lerp

Vector3 startDirection = Vector3.right; // Replace with your Vector3
Vector3 endDirection = Vector3.up; // Replace with your Vector3
float t = 0.5f; // Replace with the interpolation value between 0 and 1
Quaternion quaternion = Quaternion.Lerp(Quaternion.LookRotation(startDirection), Quaternion.LookRotation(endDirection), t);