Getting mouse position in unity

Question

I'm trying to move a object to the mouse position. But it's giving me large x value like 300 but at that place the pre placed object's x position is -4.

rigidBody.velocity = new Vector3(Input.mousePosition.x, EndPointY, 0)*4;

So how can I get the current mouse position?

Thank you..

Answer 1

The conversion with ScreenToWorldPoint is straight-forward for 2D Vectors:

    Vector2 screenPosition = new Vector2(Input.mousePosition.x, Input.mousePosition.y);
    Vector2 worldPosition = Camera.main.ScreenToWorldPoint(screenPosition);

Answer 2

Vector3 MousePosInWorldSpace()
{

   return Camera.main.ScreenToWorldPoint(Input.mousePosition);

}

ScreenToWorldPoint returns a point in world space, at the provided z distance from the camera.

Since Input.mousePosition.z position is always 0, in the above example, the z value of the returned point would equal to the z position of the camera.

In the following example Camera.main.nearClipPlane distance is provided as the z distance from camera for the returned world space point. The camera cannot see geometry that is closer to this distance.

Vector3 MousePosInWorldSpace()
{

   Vector3 mousePos = Input.mousePosition;
   return Camera.main.ScreenToWorldPoint(new Vector3(mousePos.x, mousePos.y, Camera.main.nearClipPlane));

}