Rotating Camera Around Central Point Using Arrow Keys

Questions & Answers
1

I am trying to make a script to rotate the camera around a central point using the arrow keys. The script currently looks like this: `using UnityEngine;
using System.Collections;

public class NewCameraControl : MonoBehaviour {

protected float fDistance;
protected float fSpeed;
// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () 
{
	if (Input.GetKey(KeyCode.RightArrow))
	{
		orbitTower(false);
	}
	if (Input.GetKey(KeyCode.LeftArrow))
	{
		orbitTower(true);
	}
	if (Input.GetKey(KeyCode.UpArrow))
	{
		moveInOrOut(false);
	}
	if (Input.GetKey(KeyCode.DownArrow))
	{
		moveInOrOut(true);
	}
}

protected void orbitTower(bool bLeft)
{
	float step = fSpeed * Time.deltaTime;
	float fOrbitCircumfrance = 2F*fDistance*Mathf.PI;
	float fDistanceDegrees = (fSpeed / fOrbitCircumfrance) * 360;
	float fDistanceRadians = (fSpeed / fOrbitCircumfrance) * 2*Mathf.PI;
	if (bLeft)
	{
		transform.RotateAround(Tower.t().transform.position, Vector3.up, -fDistanceRadians);
	}
	else
	{
		transform.RotateAround(Tower.t().transform.position, Vector3.up, fDistanceRadians);
	}
}

protected void moveInOrOut(bool bOut)
{
	if (bOut)
	{
		transform.Translate(0,0,-fSpeed, Space.Self);
	}
	transform.Translate(0,0,fSpeed, Space.Self);
}

}
`

Sorry that the code is in C#, I know UnityScript is more popular. The problem is that when I press the right and left arrow keys to orbit the camera (I’m not working on the in/out functionality right now), I get weird errors that I do not understand:

10585-temp.jpg
10585-temp.jpg1200×675 201 KB

Does anyone know what’s wrong and how I can fix it? Thanks!

2

Maybe because you are multiplying with undefine float fDistance
Try to set the value first and i add “else” to your MoveInOrOut

protected float fDistance = 1;
    protected float fSpeed = 1;
    public GameObject Tower;

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKey(KeyCode.RightArrow)) OrbitTower(false);
        if (Input.GetKey(KeyCode.LeftArrow)) OrbitTower(true);
        if (Input.GetKey(KeyCode.UpArrow)) MoveInOrOut(false);
        if (Input.GetKey(KeyCode.DownArrow)) MoveInOrOut(true);
    }

    protected void OrbitTower(bool bLeft)
    {
        float step = fSpeed * Time.deltaTime;
        float fOrbitCircumfrance = 2F * fDistance * Mathf.PI;
        float fDistanceDegrees = (fSpeed / fOrbitCircumfrance) * 360;
        float fDistanceRadians = (fSpeed / fOrbitCircumfrance) * 2 * Mathf.PI;
        if (bLeft)
        {
            transform.RotateAround(Tower.transform.position, Vector3.up, -fDistanceRadians);
        }
        else
            transform.RotateAround(Tower.transform.position, Vector3.up, fDistanceRadians);
    }

    protected void MoveInOrOut(bool bOut)
    {
        if (bOut)   transform.Translate(0, 0, -fSpeed, Space.Self);
        else
            transform.Translate(0, 0, fSpeed, Space.Self);
    }