using UnityEngine;
using UnityEngine.UI;

[RequireComponent(typeof(RawImage))]
public class ImageScroller : MonoBehaviour {

    [SerializeField]
    private float speedX = default;
    [SerializeField]
    private float speedY = default;
    [SerializeField]
    private bool isStretchWidth = false;

    private RawImage rawImage;
    private Rect rect;

    void Awake(){
        rawImage = GetComponent<RawImage>();
        rect = rawImage.uvRect;

        if(isStretchWidth){
            rect.width = rect.width * ((float)Screen.width / (float)Screen.height) / (9.0f / 16.0f);
        }
    }

    void LateUpdate(){
        rect.x += speedX * Time.deltaTime;
        rect.y += speedY * Time.deltaTime;
        rawImage.uvRect = rect;
    }
}