Unity Script for Basic Camera Control and Behavior

This is a script you can add to a Unity Camera to give it basic controls mimicking the functions of the scene view:

using UnityEngine;
using System.Collections;

public class CameraBehavior : MonoBehaviour
{

public float Normal_Speed = 25.0f; //Normal movement speed

public float Shift_Speed = 54.0f; //multiplies movement speed by how long shift is held down.

public float Speed_Cap = 54.0f; //Max cap for speed when shift is held down

public float Camera_Sensitivity = 0.6f; //How sensitive it with mouse

private Vector3 Mouse_Location = new Vector3(255, 255, 255); //Mouse location on screen during play (Set to near the middle of the screen)

private float Total_Speed = 1.0f; //Total speed variable for shift



void Update()
{



    //Camera angles based on mouse position
    Mouse_Location = Input.mousePosition - Mouse_Location;

    Mouse_Location = new Vector3(-Mouse_Location.y * Camera_Sensitivity, Mouse_Location.x * Camera_Sensitivity, 0);

    Mouse_Location = new Vector3(transform.eulerAngles.x + Mouse_Location.x, transform.eulerAngles.y + Mouse_Location.y, 0);

    transform.eulerAngles = Mouse_Location;

    Mouse_Location = Input.mousePosition;





    //Keyboard controls

    Vector3 Cam = GetBaseInput();
    if (Input.GetKey(KeyCode.LeftShift))
    {


        Total_Speed += Time.deltaTime;

        Cam = Cam * Total_Speed * Shift_Speed;

        Cam.x = Mathf.Clamp(Cam.x, -Speed_Cap, Speed_Cap);

        Cam.y = Mathf.Clamp(Cam.y, -Speed_Cap, Speed_Cap);

        Cam.z = Mathf.Clamp(Cam.z, -Speed_Cap, Speed_Cap);



    }
    else
    {


        Total_Speed = Mathf.Clamp(Total_Speed * 0.5f, 1f, 1000f);

        Cam = Cam * Normal_Speed;


    }

    Cam = Cam * Time.deltaTime;

    Vector3 newPosition = transform.position;

    if (Input.GetKey(KeyCode.Space))
    {


        //If the player wants to move on X and Z axis only by pressing space (good for re-adjusting angle shots)
        transform.Translate(Cam);
        newPosition.x = transform.position.x;
        newPosition.z = transform.position.z;
        transform.position = newPosition;


    }
    else
    {


        transform.Translate(Cam);


    }

}

private Vector3 GetBaseInput()
{
    Vector3 Camera_Velocity = new Vector3();

    float HorizontalInput = Input.GetAxis("Horizontal"); // Input for horizontal movement
    float VerticalInput = Input.GetAxis("Vertical"); // Input for Vertical movement

    // Horizontal movement
    Camera_Velocity += new Vector3(HorizontalInput, 0, 0);
    // Forward and backward movement
    Camera_Velocity += new Vector3(0, 0, VerticalInput);

    // Downwards movement (Y-axis) when Q is pressed
    if (Input.GetKey(KeyCode.Q))
    {
        Camera_Velocity -= new Vector3(0, 1, 0);
    }

    // Upwards movement (Y-axis) when E is pressed
    if (Input.GetKey(KeyCode.E))
    {
        Camera_Velocity += new Vector3(0, 1, 0);
    }

    return Camera_Velocity;
}

}