Bind horizontal scrollbar to camera control

Questions & Answers
1

I am trying to make it so that the user has to be moving the scrollbar right and left in order to rotate the camera. This is the script that I have:

using UnityEngine;
using System.Collections;
 
[AddComponentMenu("Camera-Control/Mouse Orbit with zoom")]
public class OrbitCamWithXOffset: MonoBehaviour
{
	public Transform target;
	public float zoomMultiplier = 1.2f;
	public float distance = 0.0f;
	public float xSpeed = 45.0f;
	public float ySpeed = 45.0f;
	public float rotLeftMax = 135f;
	public float rotRightMax = 210f;
	public float distanceMin = 1.2f;
	public float distanceMax = 2.0f;
	public Rect camSliderRect;
	
	private float hSliderValue = 10f;
	private float x = 0.0f;
	private float y = 0.0f;
	private bool camRotLeft = false;
	private bool camRotRight = false;
	
 
	// Use this for initialization.
	void Start (){
		Vector3 angles = transform.eulerAngles;
		x = angles.y;
		y = angles.x;
 
		// Make the rigid body not change rotation.
		if (rigidbody)
			rigidbody.freezeRotation = true;
	}
	
	void OnGUI(){
		camSliderRect = new Rect(10,10,200,40);
		hSliderValue = GUI.HorizontalScrollbar(camSliderRect, x, 1, rotLeftMax, rotRightMax);
	}
 
	void LateUpdate (){
		if (target && Input.GetMouseButton(0)) {
			x += Input.GetAxis ("Mouse X") * xSpeed * distance * 0.02f;
			x = ClampAngle (x, rotLeftMax, rotRightMax);
 
			Quaternion rotation = Quaternion.Euler (y, x, 0);
			distance = Mathf.Clamp (distance - Input.GetAxis ("Mouse ScrollWheel") * zoomMultiplier, distanceMin, distanceMax);
			
			Vector3 negDistance = new Vector3 (0.0f, 0.0f, -distance);
			Vector3 position = rotation * negDistance + target.position;
 
			transform.rotation = rotation;
			transform.position = position;
		}
	}
 
	// Clamp angle to 360 degrees.
	public static float ClampAngle (float angle, float min, float max){
		if (angle < -360f)
			angle += 360f;
		if (angle > 360f)
			angle -= 360f;
		return Mathf.Clamp (angle, min, max);
	}
}

This, currently, rotates the camera when you have the mouse button down. You see the scrollbar moving relative to the camera. I want it so that you have to have the mouse down on the scrollbar’s thumb in order to rotate the camera. Any help?

2

You aren’t using the scrollbar’s value:

hSliderValue = GUI.HorizontalScrollbar(camSliderRect, x, 1, rotLeftMax, rotRightMax);

Looks like you are trying to compute the value based on mouse position???

Anyway, try:

hSliderValue = GUI.HorizontalScrollbar(camSliderRect, hSliderValue, 1, rotLeftMax, rotRightMax);

and use hSliderValue as THE slider value for your rotation.