XiJianYCYL/Assets/3D/Scripts/EditorLabel.cs

#if UNITY_EDITOR
	using UnityEngine;
	using UnityEditor;
	using System.Collections;

	public class EditorLabel : MonoBehaviour {



		public string text;

		private static GUIStyle style;
		private static GUIStyle Style{
			get{
				if(style == null){
					style = new GUIStyle( EditorStyles.largeLabel );
					style.alignment = TextAnchor.MiddleCenter;
					style.normal.textColor = new Color(0.9f,0.9f,0.9f);
					style.fontSize = 32;
				}
				return style;
			}

		}


		void OnDrawGizmos(){


			RaycastHit hit;
			Ray r = new Ray(transform.position + Camera.current.transform.up * 8f, -Camera.current.transform.up );
			if( GetComponent<Collider>().Raycast( r, out hit, Mathf.Infinity) ){

				float dist = (Camera.current.transform.position - hit.point).magnitude;

				float fontSize = Mathf.Lerp(64, 12, dist/10f);
				
				Style.fontSize = (int)fontSize;

				Vector3 wPos = hit.point + Camera.current.transform.up*dist*0.07f;



				Vector3 scPos = Camera.current.WorldToScreenPoint(wPos);
				if(scPos.z <= 0){
					return;
				}

			

				float alpha = Mathf.Clamp(-Camera.current.transform.forward.y, 0f, 1f);
				alpha = 1f-((1f-alpha)*(1f-alpha));

				alpha = Mathf.Lerp(-0.2f,1f,alpha);

				Handles.BeginGUI();


				scPos.y = Screen.height - scPos.y; // Flip Y


				Vector2 strSize = Style.CalcSize(new GUIContent(text));

				Rect rect = new Rect(0f, 0f, strSize.x + 6,strSize.y + 4);
				rect.center = scPos - Vector3.up*rect.height*0.5f;
				GUI.color = new Color(0f,0f,0f,0.8f * alpha);
				GUI.DrawTexture(rect, EditorGUIUtility.whiteTexture);
				GUI.color = Color.white;
				GUI.color = new Color(GUI.color.r, GUI.color.g, GUI.color.b, alpha);
				GUI.Label(rect, text, Style);
				GUI.color = Color.white;

				Handles.EndGUI();
			}




		}
	}
#endif