Unity 广告牌技术

广告牌技术

简单说一下什么是广告牌技术，在游戏场景中，场景物体无论何时何地都会面向我们的视角，也就是相机。

using UnityEngine;
using System.Collections;

public class NcBillboard : NcEffectBehaviour
{
	// Attribute ------------------------------------------------------------------------
	public		bool			m_bCameraLookAt;
	public		bool			m_bFixedObjectUp;
	public		bool			m_bFixedStand;
	public		enum AXIS_TYPE	{AXIS_FORWARD, AXIS_BACK, AXIS_RIGHT, AXIS_LEFT, AXIS_UP, AXIS_DOWN};
	public		AXIS_TYPE		m_FrontAxis;
	public		enum ROTATION	{NONE, RND, ROTATE}
	public		ROTATION		m_RatationMode;
	public		enum AXIS		{X=0, Y, Z};
	public		AXIS			m_RatationAxis		= AXIS.Z;
	public		float			m_fRotationValue	= 180;

	protected	float			m_fRndValue;
	protected	float			m_fTotalRotationValue;
	protected	Quaternion		m_qOiginal;

	// Property -------------------------------------------------------------------------
#if UNITY_EDITOR
	public override string CheckProperty()
	{
		if (1 < gameObject.GetComponents(GetType()).Length)
			return "SCRIPT_WARRING_DUPLICATE";

		return "";	// no error
	}
#endif

	// Loop Function --------------------------------------------------------------------
	void Awake()
	{
	}

	void OnEnable()
	{
#if UNITY_EDITOR
		if (IsCreatingEditObject() == false)
			UpdateBillboard();
#else
 		UpdateBillboard();
#endif
	}

	public void UpdateBillboard()
	{
		m_fRndValue	= Random.Range(0,360.0f);
		if (enabled)
			Update();
	}

	void Start()
	{
		m_qOiginal	= transform.rotation;
	}

	void Update()
	{
		if (Camera.main == null)
			return;
		Vector3		vecUp;

		// 墨皋扼 诀氦磐甫 公矫窍绊 坷璃狼 诀氦磐甫 蜡瘤茄促
		if (m_bFixedObjectUp)
//  			vecUp		= m_qOiginal * Vector3.up;
			vecUp		= transform.up;
		else vecUp		= Camera.main.transform.rotation * Vector3.up;

		if (m_bCameraLookAt)
			transform.LookAt(Camera.main.transform,	vecUp);
		else transform.LookAt(transform.position + Camera.main.transform.rotation * Vector3.back, vecUp);

		switch (m_FrontAxis)
		{
			case AXIS_TYPE.AXIS_FORWARD:	break;
			case AXIS_TYPE.AXIS_BACK:		transform.Rotate(transform.up,		180, Space.World);		break;
			case AXIS_TYPE.AXIS_RIGHT:		transform.Rotate(transform.up,		270, Space.World);		break;
			case AXIS_TYPE.AXIS_LEFT:		transform.Rotate(transform.up,		 90, Space.World);		break;
			case AXIS_TYPE.AXIS_UP:			transform.Rotate(transform.right,	 90, Space.World);		break;
			case AXIS_TYPE.AXIS_DOWN:		transform.Rotate(transform.right,	270, Space.World);		break;
		}

		if (m_bFixedStand)
			transform.rotation  = Quaternion.Euler(new Vector3(0, transform.rotation.eulerAngles.y, transform.rotation.eulerAngles.z));

		if (m_RatationMode == ROTATION.RND)
			transform.localRotation	*= Quaternion.Euler((m_RatationAxis == AXIS.X ? m_fRndValue : 0), (m_RatationAxis == AXIS.Y ? m_fRndValue : 0), (m_RatationAxis == AXIS.Z ? m_fRndValue : 0));
		if (m_RatationMode == ROTATION.ROTATE)
		{
			float	fRotValue = GetEngineDeltaTime() * m_fRotationValue;
			transform.Rotate((m_RatationAxis == AXIS.X ? fRotValue : 0), (m_RatationAxis == AXIS.Y ? fRotValue : 0), (m_RatationAxis == AXIS.Z ? fRotValue : 0), Space.Self);

	}

}

using UnityEditor;
using UnityEngine;
using System.Collections.Generic;
using System.Collections;
using System.IO;

[CustomEditor(typeof(NcBillboard))]

public class NcBillboardEditor : FXMakerEditor
{
	// Attribute ------------------------------------------------------------------------
	protected	NcBillboard		m_Sel;

	// Property -------------------------------------------------------------------------
	// Event Function -------------------------------------------------------------------
    void OnEnable()
    {
 		m_Sel = target as NcBillboard;
 		m_UndoManager	= new FXMakerUndoManager(m_Sel, "NcBillboard");
   }

    void OnDisable()
    {
    }

	public override void OnInspectorGUI()
	{
		AddScriptNameField(m_Sel);
		m_UndoManager.CheckUndo();
		// --------------------------------------------------------------
		bool bClickButton = false;
		EditorGUI.BeginChangeCheck();
		{
//			DrawDefaultInspector();
			m_Sel.m_fUserTag = EditorGUILayout.FloatField(GetCommonContent("m_fUserTag"), m_Sel.m_fUserTag);

			m_Sel.m_bCameraLookAt		= EditorGUILayout.Toggle(GetHelpContent("m_bCameraLookAt")			, m_Sel.m_bCameraLookAt);
			m_Sel.m_bFixedObjectUp		= EditorGUILayout.Toggle(GetHelpContent("m_bFixedObjectUp")			, m_Sel.m_bFixedObjectUp);
			m_Sel.m_bFixedStand			= EditorGUILayout.Toggle(GetHelpContent("m_bFixedStand")			, m_Sel.m_bFixedStand);
			m_Sel.m_FrontAxis			= (NcBillboard.AXIS_TYPE)EditorGUILayout.EnumPopup(GetHelpContent("m_FrontAxis"), m_Sel.m_FrontAxis, GUILayout.MaxWidth(Screen.width));

			m_Sel.m_RatationMode		= (NcBillboard.ROTATION)EditorGUILayout.EnumPopup(GetHelpContent("m_RatationMode"), m_Sel.m_RatationMode, GUILayout.MaxWidth(Screen.width));
			if (m_Sel.m_RatationMode == NcBillboard.ROTATION.RND || m_Sel.m_RatationMode == NcBillboard.ROTATION.ROTATE)
				m_Sel.m_RatationAxis	= (NcBillboard.AXIS)EditorGUILayout.EnumPopup(GetHelpContent("m_RatationAxis"), m_Sel.m_RatationAxis, GUILayout.MaxWidth(Screen.width));
			if (m_Sel.m_RatationMode == NcBillboard.ROTATION.ROTATE)
				m_Sel.m_fRotationValue	= EditorGUILayout.FloatField(GetHelpContent("m_fRotationValue")		, m_Sel.m_fRotationValue);
		}
		m_UndoManager.CheckDirty();
		// --------------------------------------------------------------
		if ((EditorGUI.EndChangeCheck() || bClickButton) && GetFXMakerMain())
			OnEditComponent();
		// ---------------------------------------------------------------------
		if (GUI.tooltip != "")
			m_LastTooltip	= GUI.tooltip;
		HelpBox(m_LastTooltip);
	}

	// ----------------------------------------------------------------------------------
	// ----------------------------------------------------------------------------------
	protected GUIContent GetHelpContent(string tooltip)
	{
		string caption	= tooltip;
		string text		= FXMakerTooltip.GetHsEditor_NcBillboard(tooltip);
		return GetHelpContent(caption, text);
	}

	protected override void HelpBox(string caption)
	{
		string	str	= caption;
		if (caption == "" || caption == "Script")
			str = FXMakerTooltip.GetHsEditor_NcBillboard("");
		base.HelpBox(str);
	}
}

	protected static string[,]	HcFolderPopup_Common = {
								{
									 "- Display an image and a name together."
									,"- Do not divide into sub directories; show all contents in the list."
									,"- Finish operations and close the Popup window." + "\n" +
									 "- As the chosen operation is already saved, choose Undo first if you want to cancel" + "\n" +
									 "- Though the window is closed, you can use Undo function by opening the window again."
									,"- Cancel save."
									,"- Save in the chosen category."
									,"- Remove the chosen prefab."
								}
							  };