Screen coordinates from World Position

This is what I get working with Orthographic view, but I would need it with Perspective one. Any idea?

string sName = oTile.GetPopCenter().GetName();
Vector2 v2 = HexCoordinates.HexToWorld(pair.Key);

Vector2 v2Screen = Camera.main.WorldToScreenPoint(v2);
Vector2 v2Viewport = Camera.main.WorldToViewportPoint(v2);
float yOffset = 0f;

GUI.Label (new Rect(v2Screen.x, (Screen.height - (Screen.height*v2Viewport.y)-yOffset),120f,30f),sName);

Hi, khash!

What I want is to, for example, attach a label (GUI TEXT) to a city model, instantiated at some 3d world position.

I think what you're looking for is to set a UI object's render mode to world space, default is screen space. This changes it's position into the 3d coordinates you are familiar with. Then either attach it to your city model's prefab or have a script that modifies it's world position. Make sure to change the layer to "Actors" too otherwise it won't be visible.

You're welcome. You probably want those UI objects to always face the camera too. If so you can add this script onto the UI object.


using UnityEngine;
using System.Collections;

public class CameraFacingBillboard : MonoBehaviour
{
private Camera m_Camera;

void Awake()
{
m_Camera = Camera.main;
}

void Update()
{
transform.LookAt(transform.position - m_Camera.transform.rotation * Vector3.back,
                m_Camera.transform.rotation * Vector3.up);
}
}