ObjectLabel.js and 'behind'

Unity Engine
1

Hiya

I’m using the below script from the wiki to add a label to an object in 3d space.

I’m using the ClampToScreen variable to keep the label on screen even if it’s out of sight of the player, HOWEVER: the object label returns to the center of the camera view even if the object is BEHIND the camera. I assume because it’s just seeing the thisTransform.position.z bit along the z axis line and doesn’t know if that’s in front or behind the cam…

Can anyone suggest a way to keep the label on the edge of the screen if the object is behind the camera?

var target : Transform;  // Object that this label should follow

var offset = Vector3.up;    // Units in world space to offset; 1 unit above object by default
var clampToScreen = false;  // If true, label will be visible even if object is off screen
var useMainCamera = true;   // Use the camera tagged MainCamera
var cameraToUse : Camera;   // Only use this if useMainCamera is false
private var cam : Camera;
private var thisTransform : Transform;

function Start () {
    thisTransform = transform;
    if (useMainCamera)
        cam = Camera.main;
    else
        cam = cameraToUse;
}

function Update () {
    thisTransform.position = cam.WorldToViewportPoint(target.position + offset);
    if (clampToScreen)
        thisTransform.position = Vector3(Mathf.Clamp(thisTransform.position.x, .05, .95),
                                         Mathf.Clamp(thisTransform.position.y, .05, .95),
                                         thisTransform.position.z);
}
2

That’s a good point…I updated the script so the label behaves better when the object goes behind the camera.

–Eric