Unity2D move transform on touch

Question

I want to move my main player as the user moves its mouse (on PC ) or finger (on mobile devices)

I made a simple illustration. If I move my finger 10 units in left, i want the player to move 10 units to the left as well. How can I achive this, for both mobile and PC ?

Answer 1

Vector3 screenPoint;
Vector3 offset;

void OnMouseDown()
{
    screenPoint = Camera.main.WorldToScreenPoint(gameObject.transform.position);
    offset = gameObject.transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z));
}

void OnMouseDrag()
{
    Vector3 curScreenPoint = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
    Vector3 curPosition = Camera.main.ScreenToWorldPoint(curScreenPoint) + offset;
    transform.position = curPosition;
}

Add this code to your player's script.

Edit: This code is so simple to convert it to "move via click from every where". The only problem was OnMouse* functions works only when you click the scripted and collidered object. Just change it with Input.GetMouseButton and its solved.

bool flag = false;

void Update()
{
    if (Input.GetMouseButton(0))
    {
        if (!flag)
        {
            flag = true;
            screenPoint = Camera.main.WorldToScreenPoint(gameObject.transform.position);
            offset = gameObject.transform.position - Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z));
        }

        Vector3 curScreenPoint = new Vector3(Input.mousePosition.x, Input.mousePosition.y, screenPoint.z);
        Vector3 curPosition = Camera.main.ScreenToWorldPoint(curScreenPoint) + offset;
        transform.position = curPosition;
    }
    else
    {
        flag = false;
    }
}