Problems with Clamping Player to Screen

Questions & Answers
1

I am currently working on a simple Space Shooter. To clamp my space ship to the screen I use this code snippet:

ScreenPosition = Camera.main.WorldToViewportPoint (this.transform.position);
    		ScreenPosition.x = Mathf.Clamp(ScreenPosition.x,0f, 1f);
    		ScreenPosition.y = Mathf.Clamp(ScreenPosition.y, 0f, 1f);
    		this.transform.position = Camera.main.ViewportToWorldPoint(ScreenPosition);

But the space ship is invisible when I start the game. It is still shooting, but the ship and its children are not visible. If I delete the last line, everything is fine, except that the ship isn’t clamped to the screen anymore. I can’t figure out how to work around this problem.

edit: I am not getting any errors in the console.

Thanks in advance…

2

I was playing around with the code and found the answer myself, so if anyone ever has a similar problem, this is how I solved it.
At first, my ScreenPosition variable was a Vector2 variable. As soon as I changed it to a Vector3 and added the transform.position.z from the Prefab as ScreenPosition.z (which was 5):

	ScreenPosition = Camera.main.WorldToViewportPoint (this.transform.position);
	ScreenPosition.x = Mathf.Clamp(ScreenPosition.x,0.07f, 0.93f);
	ScreenPosition.y = Mathf.Clamp(ScreenPosition.y, 0.07f, 0.93f);
	ScreenPosition.z = 5f;
	this.transform.position = Camera.main.ViewportToWorldPoint(ScreenPosition);

the spaceship didn’t disappear anymore. Before, the position of the spaceship was changed to 0 and probably rendered behind the camera or something like that.