CityBuilder/Assets/Scripts/CameraController.cs

using UnityEngine;
using UnityEngine.InputSystem;

public class CameraController : MonoBehaviour
{
    public float moveSpeed;
    public float minXRot;
    public float maxXRot;
    public float minZoom;
    public float maxZoom;
    public float zoomSpeed;
    public float rotateSpeed;
    private float curXRot;
    private float curZoom;
    private Camera cam;

    public Vector3 minBounds;
    public Vector3 maxBounds;

    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        cam = Camera.main;
        curZoom = cam.transform.localPosition.y;
        curXRot = -50;
    }

    // Update is called once per frame
    void Update()
    {
        HandleZoom();
        HandleRotation();
        HandleMovement();
        HandleEdges(); // Ensure camera stays within bounds
        RotateGameObject();
    }

    public void HandleZoom()
    {
        //getting the scrool wheel value
        curZoom += Input.GetAxis("Mouse ScrollWheel") * -zoomSpeed;
        //clamping it between min and max zoom
        curZoom = Mathf.Clamp(curZoom, minZoom, maxZoom);
        //applying it to the camera
        cam.transform.localPosition = Vector3.up * curZoom;
    }

    public void HandleRotation()
    {
        //camera look
        if (Input.GetMouseButton(1))
        {
            //getting the mouse movement
            float x = Input.GetAxis("Mouse X");
            float y = Input.GetAxis("Mouse Y");
            //rotating the camera based on the mouse movement
            curXRot += -y * rotateSpeed;
            //clamping the x rotation to prevent flipping
            curXRot = Mathf.Clamp(curXRot, minXRot, maxXRot);
            //applying the rotation to the camera
            transform.eulerAngles = new Vector3(curXRot, transform.eulerAngles.y + (x * rotateSpeed), 0.0f);
        }
    }

    public void HandleMovement()
    {
        //movement of the camera forward
        Vector3 forward = cam.transform.forward;
        //prevent vertical movement
        forward.y = 0.0f;
        //normalize the forward vector to prevent faster movement when moving diagonally
        forward.Normalize();
        //movement of the camera right
        Vector3 right = cam.transform.right;
        //getting the horizontal and vertical input from keyboard
        float moveX = Input.GetAxisRaw("Horizontal");
        float moveZ = Input.GetAxisRaw("Vertical");
        //get local direction based on input
        Vector3 dir = forward * moveZ + right * moveX;
        //normalize the direction vector to prevent faster movement when moving diagonally
        dir.Normalize();
        //apply the movement speed and delta time to the direction vector
        dir *= moveSpeed * Time.deltaTime;
        //apply the movement to the camera anchor
        transform.position += dir;
    }

    public void HandleEdges()
    {
        // Clamp the camera position within the defined bounds
        Vector3 clampedPosition = transform.position;
        clampedPosition.x = Mathf.Clamp(clampedPosition.x, minBounds.x, maxBounds.x);
        clampedPosition.z = Mathf.Clamp(clampedPosition.z, minBounds.z, maxBounds.z);
        transform.position = clampedPosition;
    }

    public void RotateGameObject()
    {
        if (!BuildingPlacement.Instance.currentlyPlacing)
        {
            return; // Do nothing if not currently placing a building
        }
        // Check for input to rotate the game object
        GameObject placementObject = BuildingPlacement.Instance.placementPrefab;
        // Rotate left or right based on input
        if (placementObject != null)
        {
            //if (Input.GetButtonDown("RotateLeft"))
            if (Keyboard.current.qKey.wasPressedThisFrame)
            {
                // Rotate the game object by -90 degrees around the Y axis
                placementObject.transform.Rotate(0, -90, 0);
                BuildingPlacement.Instance.curIndicatorRotation = placementObject.transform.rotation;
            }
            //else if (Input.GetButtonDown("RotateRight"))
            else if (Keyboard.current.eKey.wasPressedThisFrame)
            {
                // Rotate the game object by 90 degrees around the Y axis
                placementObject.transform.Rotate(0, 90, 0);
                BuildingPlacement.Instance.curIndicatorRotation = placementObject.transform.rotation;

            }
        }
    }
}