koobas.hobune.stream
Problem with lifebar guiTexture duplicated
Hi to all. I'm working on a life bar for the enemies. Each enemy is correctly instantiate with his own lifebar. In the scene I have a first person controller.
Now, the problem is that if I turn 180 degrees and look behind, the life bars are duplicated almost like in a mirror. It's not an editor issue, persists in the build too. It's a camera problem I guess but I don't know how to fix it.
You can see here what happen.
The object myHealthBar is a guiTexture. The code is:
#pragma strict
// Health bar variables
var hp : float = 100;
var maxHp : float = 100;
var healthBarWidth : int;
var healthBarHeight : int;
var healthBarStretch : int;
var myHealthBar : GameObject;
var myHb : GameObject;
// Colors
var colorStart : Color;
var colorEnd : Color;
function Start ()
{
myHb = Instantiate (myHealthBar, transform.position, transform.rotation);
}
function Update ()
{
// Health bar
myHb.transform.position = camera.main.WorldToViewportPoint(transform.position);
myHb.transform.localScale = Vector3.zero;
var healthPercent : float = hp / maxHp;
if (healthPercent < 0){healthPercent = 0;}
if (healthPercent > 100){healthPercent = 100;}
healthBarStretch = healthPercent * healthBarWidth;
myHb.guiTexture.color = Color.Lerp (colorEnd, colorStart, healthPercent);
myHb.guiTexture.pixelInset = Rect(-healthBarWidth/2, 20, healthBarStretch, healthBarHeight);
damage();
}
function damage ()
{
hp = hp - .1;
if (hp < 0){hp = 0;}
}
Excuse me for my bad english, I'm italian. Thanks in advance.
Your problem is that WorldToViewportPoint will map the world point onto the viewport even if it is behind you (this is by design and is occasionally very useful = but often causes this problem). Don't draw your health bar when the enemy is behind you.
By the way you can test whether it is behind you by doing this:
if(Vector3.Dot(transform.forward, target.position - transform.position)>=0) {
//It's in front of you
}
Thanks for the hints. I solved the problem adding these lines.
if (inSight)
{
myHb.guiTexture.pixelInset = Rect(-healthBarWidth/2, 20, healthBarStretch, healthBarHeight);
}
else
{
myHb.guiTexture.pixelInset = Rect(0, 0, 0, 0);
}
}
function OnBecameVisible()
{
inSight = true;
}
function OnBecameInvisible()
{
inSight = false;
}
I think that this is the simplest way.
