csharp unity / 2d draggable gameobject

Posted 2021-05-12

public class Plane : MonoBehaviour
{

	private bool isMouseDown = false;
	private Vector3 lastMousePosition = Vector3.zero;
	// Use this for initialization
	void Start () {
		
	}
	
	// Update is called once per frame
	void Update () {
		if (Input.GetMouseButtonDown(0))
		{
			isMouseDown = true;
		}

		if (Input.GetMouseButtonUp(0))
		{
			isMouseDown = false;
			lastMousePosition = Vector3.zero;
		}

		if (isMouseDown)
		{
			if (lastMousePosition != Vector3.zero)
			{
				Vector3 offset = Camera.main.ScreenToWorldPoint(Input.mousePosition) - lastMousePosition;
				this.transform.position += offset;
			}

			lastMousePosition = Camera.main.ScreenToWorldPoint(Input.mousePosition);
		}
	}
}