PositionViewer/Assets/Scripts/Controllers/CameraController.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.EventSystems;

/// <summary>
/// Отслеживание объекта
/// </summary>
public class CameraController : MonoBehaviour
{
    public enum RotationAxes { MouseXAndY, MouseX, MouseY, RelativeObject, KeyBoard }
    public RotationAxes axes = RotationAxes.MouseXAndY;
    public float sensitivityX = 2F;
    public float sensitivityY = 2F;
    public float minimumX = -360F;
    public float maximumX = 360F;
    public float minimumY = -90F;
    public float maximumY = 90F;
    float rotationY = -60F;

    // For camera movement
    //float CameraPanningSpeed = 10.0f;

    // Target Rotate
    public Transform target;
    public Vector3 offset;
    public float sensitivity = 3; // чувствительность мышки
    public float limit = 90; // ограничение вращения по Y
    public float zoom = 0.5f; // чувствительность при увеличении, колесиком мышки
    public float zoomMax = 50; // макс. увеличение
    public float zoomMin = 0.5f; // мин. увеличение
    private float X, Y;


    void Start()
    {
        limit = Mathf.Abs(limit);
        if (limit > 90) limit = 90;
        offset = new Vector3(offset.x, offset.y, offset.z/*-Mathf.Abs(zoomMax) / 2*/);
        transform.position = target.position + offset;
    }

    void Update()
    {        
        if(axes == RotationAxes.KeyBoard)KeyboardsCommands();
        else MouseInput();
    }

    void MouseInput()
    {
        if (EventSystem.current.IsPointerOverGameObject())
        {
            return;
        }

        if (Input.GetMouseButton(0))
        {
        }
        else if (Input.GetMouseButton(1))
        {
            MouseRightClick();
        }
        else if (Input.GetMouseButton(2))
        {
            MouseMiddleButtonClicked();
        }
        else if (Input.GetMouseButtonUp(1))
        {
            ShowAndUnlockCursor();
        }
        else if (Input.GetMouseButtonUp(2))
        {
            ShowAndUnlockCursor();
        }
        else
        {
            MouseWheeling();
        }
    }

    void ShowAndUnlockCursor()
    {
        Cursor.lockState = CursorLockMode.None;
        Cursor.visible = true;
    }

    void HideAndLockCursor()
    {
        Cursor.lockState = CursorLockMode.Locked;
        Cursor.visible = false;
    }

    void MouseMiddleButtonClicked()
    {
        HideAndLockCursor();
        Vector3 NewPosition = new Vector3(Input.GetAxis("Mouse X"), 0, Input.GetAxis("Mouse Y"));
        Vector3 pos = transform.position;
        if (NewPosition.x > 0.0f)
        {
            pos += transform.right;
        }
        else if (NewPosition.x < 0.0f)
        {
            pos -= transform.right;
        }
        if (NewPosition.z > 0.0f)
        {
            pos += transform.forward;
        }
        if (NewPosition.z < 0.0f)
        {
            pos -= transform.forward;
        }
        pos.y = transform.position.y;
        transform.position = pos;
    }

    void MouseRightClick()
    {
        HideAndLockCursor();
        switch (axes)
        {
            case RotationAxes.MouseXAndY:


                float rotationX = transform.localEulerAngles.y + Input.GetAxis("Mouse X") * sensitivityX;

                rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
                rotationY = Mathf.Clamp(rotationY, minimumY, maximumY);

                transform.localEulerAngles = new Vector3(-rotationY, rotationX, 0);
                break;

            case RotationAxes.MouseX:

                transform.Rotate(0, Input.GetAxis("Mouse X") * sensitivityX, 0);
                break;
            case RotationAxes.RelativeObject:

                /*if (Input.GetAxis("Mouse ScrollWheel") > 0) 
                    offset.z += zoom;
                else if (Input.GetAxis("Mouse ScrollWheel") < 0) 
                    offset.z -= zoom;*/
                //offset.z = Mathf.Clamp(offset.z, -Mathf.Abs(zoomMax), -Mathf.Abs(zoomMin));

                X = transform.localEulerAngles.y + Input.GetAxis("Mouse X") * sensitivity;
                Y += Input.GetAxis("Mouse Y") * sensitivity;
                Y = Mathf.Clamp(Y, -limit, limit);
                transform.localEulerAngles = new Vector3(-Y, X, 0);
                transform.position = transform.localRotation * offset + target.position;
                break;
                
            default:
                rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
                rotationY = Mathf.Clamp(rotationY, minimumY, maximumY);

                transform.localEulerAngles = new Vector3(-rotationY, transform.localEulerAngles.y, 0);
                break;
        }
    }

    void MouseWheeling()
    {
        /*Vector3 pos = transform.position;
        if (Input.GetAxis("Mouse ScrollWheel") < 0)
        {
            pos = pos - transform.forward;
            transform.position = pos;
        }
        if (Input.GetAxis("Mouse ScrollWheel") > 0)
        {
            pos = pos + transform.forward;
            transform.position = pos;
        }*/

        if (Input.GetAxis("Mouse ScrollWheel") > 0)
        {
            offset.z += zoom;
        }
        else if (Input.GetAxis("Mouse ScrollWheel") < 0)
            offset.z -= zoom; 
        offset.z = Mathf.Clamp(offset.z, -Mathf.Abs(zoomMax), -Mathf.Abs(zoomMin));

        transform.position = transform.localRotation * offset + target.position;
    }

    private Vector3 GetBaseInput()
    { //returns the basic values, if it's 0 than it's not active.
        Vector3 p_Velocity = new Vector3();
        if (Input.GetKey(KeyCode.W))
        {
            p_Velocity += new Vector3(0, 0, 1);
        }
        if (Input.GetKey(KeyCode.S))
        {
            p_Velocity += new Vector3(0, 0, -1);
        }
        if (Input.GetKey(KeyCode.A))
        {
            p_Velocity += new Vector3(-1, 0, 0);
        }
        if (Input.GetKey(KeyCode.D))
        {
            p_Velocity += new Vector3(1, 0, 0);
        }
        return p_Velocity;
    }

    private void KeyboardsCommands()
    {
        //Keyboard commands
        //float f = 0.0f;
        Vector3 p = GetBaseInput();
      

        p = p * Time.deltaTime;
        Vector3 newPosition = transform.position;
        if (Input.GetKey(KeyCode.Space))
        { //If player wants to move on X and Z axis only
            transform.Translate(p);
            newPosition.x = transform.position.x;
            newPosition.z = transform.position.z;
            transform.position = newPosition;
        }
        else
        {
            transform.Translate(p);
        }
    }
}