koobas.hobune.stream
how can I add a 2D label to a 3D GameObject?
Hello, I have a number of GameObjects in an array, in varying number, and I want to add a UI label at some position over them. I want to do this by script, because my objects may change. I have tried the following, with a Canvas and attaching the script to the main camera, and I see the sphere, but no label is shown. Am I missing something obvious?
Thanks.
using UnityEngine;
using UnityEngine.UI;
public class Bug : MonoBehaviour
{
Canvas canv;
GameObject[] obj=new GameObject[100];
Text objlabel;
void Start()
{
canv = GameObject.Find("Canvas").GetComponent<Canvas>();
Camera.main.transform.position = new Vector3(5, 5, -10);
obj[0] = GameObject.CreatePrimitive(PrimitiveType.Sphere);
obj[0].transform.position = new Vector3(-7.5f,6.0f,1.4f);
obj[0].SetActive(false); // hide the sphere
GameObject golab=new GameObject("Lab1");
objlabel=golab.AddComponent<Text>();
objlabel.text="XXXXX";
objlabel.transform.SetParent(canv.transform);
Vector3 namePos=Camera.main.WorldToScreenPoint(obj[0].transform.position);
objlabel.transform.position=namePos;
}
void Update()
{}
}
An auxiliary question is how I can set the canvas to adjust to the main camera view?
Here's some code that I use for that.
// Add namePlate here after instaniation.
namePlate = new GameObject("NamePlate");
namePlate.AddComponent<TextMesh>(); // To display name.
// Adjust position and settings.
TextMesh textMesh = namePlate.GetComponent<TextMesh>();
if (textMesh != null)
{
Debug.Log("Adding Nameplate");
textMesh.transform.position = player.transform.position + new Vector3(0, 1.3f, 0); // elevate y
textMesh.transform.rotation = player.transform.rotation * new Quaternion(0, 180.0f, 0, 0); // turn it around
textMesh.characterSize = 0.2f;
textMesh.fontSize = 10;
textMesh.alignment = TextAlignment.Center;
textMesh.anchor = TextAnchor.MiddleCenter;
textMesh.color = Color.white;
textMesh.text = id; // Set the name text to the network id string.
}
// Now set the new Player object as its parent.
namePlate.transform.parent = player.transform;
Thanks. This works, but the problem is that the size of the text depends on the distance of the GameObject. I really would like to add some text in 2D at a constant distance in front of the camera and at some position corresponding to a 3D object. This is why I had initially used Camera.main.WorldToScreenPoint and a Canvas.
Thanks, here is my improved version, without a Canvas:
public class Bug2 : MonoBehaviour
{
GameObject[] obj=new GameObject[100];
TextMesh objlabel;
void Start()
{
Camera.main.transform.position = new Vector3(5, 5, -10);
obj[0] = GameObject.CreatePrimitive(PrimitiveType.Sphere);
obj[0].transform.position = new Vector3(-7.5f,6.0f,1.4f);
obj[0].SetActive(true); // if false, hide the sphere (and the label)
GameObject golab=new GameObject("Lab1");
objlabel=golab.AddComponent<TextMesh>();
objlabel.text="Sphere";
objlabel.alignment = TextAlignment.Center;
objlabel.anchor = TextAnchor.MiddleCenter;
objlabel.color = Color.red;
objlabel.transform.parent=obj[0].transform;
objlabel.transform.position=obj[0].transform.position+new Vector3(0,2,0);
}
void Update()
{}
}
