Getting the 2d coordinates of an object

Questions & Answers
1

Hey guys,
I have a 3d cylinder object called “Tower” and I am trying to create a 2d rectangle health bar above it. I am trying to use

Vector3 screenPos = Camera.WorldToScreenPoint(target.position);

to get the 2d coordinates of my “Tower” which i will then use to draw a rectangle at that position. Can someone help me? Where I do put in the tower object? How do I get the coordinates of my tower object? Thanks,

2

You can access its position by doing this.

Vector3 towerPos = GameObject.Find("Tower").transform.position;

I guess the tower’s position doesn’t change, so you could easily do this in the Start() function, so you don’t keep calling the search function which takes a lot of useage of the device.

3

For determination of coordinates on the screen you use function WorldToScreenPoint(). But don’t forget that it gives pivot point coordinates. In your case - the cylinder center. Furtherfor the health bar display, you can use either GUITexture, or GUIElements inOnGUI(). I wrote GUITexture example below (attach this script at your tower):

 public GUITexture myhb = null; //your health bar for tower
 
 void Start() {
  setPosScr();
 }

 void Update() {
  setPosScr();
 }

 public void setPosScr() {
  Vector3 screenPos = Camera.WorldToScreenPoint(this.transform.position);
  myhb.pixelInset = new Rect(screenPos.x, Screen.height - screenPos.y, myhb.pixelInset.width, mybh.PixelInset.height);
 }

If you will use GUIElement tnen see my pregoing response