points if object lands upside down

Questions & Answers
1

Hi friends, I have a simple flicking game in which I get one point if object has landed.
Can someone please advise on how I can:

  1. check if object is upside down
  2. award 5 points if upside down
    everything works as it should when upright but I would like to add extra points if object lands upside down.

thanks to all for your help and happy new year to you all!!

3

Quite simple way. Create two empty objects and put them into object you are flipping hierarchy wise.

  • One at the top of the object you are flicking
  • Second at the bottom of the object you are flicking
    FlickingObject (lets say it is 1x1x1 cube)
        Top (localPosition = (0.0, 0.5, 0.0))
        Bottom (localPosition = (0.0, -0.5, 0.0))

Than when object lands you can do simple position comparing:

if (Mathf.Abs(top.position.y - bottom.position.y) < 0.001f)
{
    Debug.Log("Landed on the side");
}
else if (top.position.y > bottom.position.y)
{
    Debug.Log("Landed with top looking up");
}
else 
{
    Debug.Log("Landed with bottom looking up");
}

P.S. Feel free to remove first checking if it is not possible for your object to land neither on top neither on bottom. Like coin landing on it’s edge.

2

Do you have a 2D game or 3D?

Well… I would say that the easiest way is to check rotation in a moment of collision. For example, if you have a 2D game. You should decide between what range the object will be considered as upside down. Then,

float angle = obj.rotation.eulerAngles.z;
if(angle > 90f && angle <  270f)
     // Upside down -> Add more points

For 3D game is mostly the same, but you should check 2 axis: x and z.

4

thanks guys, its is a 2d game, I was going along the lines of if (Vector3.Dot(transform.up, Vector3.down) > 0)
but unfortunately I am far from a coder, just trying to learn it and understand it all.

Thanks I will try your suggestions and post back