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#ifndef __SkyClouds__ 
#define __SkyClouds__ 
 
//----------------------------------------------------------------------------- 
//  
// @doc 
// 
// @module	SkyClouds.h - Sky cloud support | 
// 
// This module contains the support for the sky cloud. 
// 
// Copyright (c) 1999 - Descartes Systems Sciences, Inc. 
// 
// @end 
// 
// $History: DcComEngGenConfigurePage.h $ 
// 
//----------------------------------------------------------------------------- 
 
//----------------------------------------------------------------------------- 
// 
// Required include files 
// 
//----------------------------------------------------------------------------- 
 
#include "../_CoreLib/Vector2.h" 
#include "../_CoreLib/Vector4.h" 
#include "../_CoreLib/DoubleLink.h" 
#include "../_CoreLib/DcString.h" 
 
//----------------------------------------------------------------------------- 
// 
// Forward definitions 
// 
//----------------------------------------------------------------------------- 
 
//----------------------------------------------------------------------------- 
// 
// @class CSkyClouds | The class provides support for the sky clouds 
// 
//----------------------------------------------------------------------------- 
 
class CSkyClouds 
{ 
// @access Types and enumerations 
public: 
	enum _Type { 
		Type_Clouds	= 0, 
		Type_Stars	= 1, 
	}; 
 
// @access Constructors and Destructors 
public: 
 
	// @cmember Constructor. 
 
	CSkyClouds (); 
 
	// @cmember Destructor 
 
	~CSkyClouds (); 
 
// @access Public Methods 
public: 
 
	// @cmember Create the SkyClouds 
 
	void Create (_Type nType, const char *pszTexture,  
	    const CVector2 &vRate, float fScale, const CVector3 &vDayColor,  
		const CVector3 &vNightColor, float fTransitionExp); 
 
	// @cmember Compute the position of the clouds 
	 
	void ComputePosition (float fTimeInDays, float fDayFactor); 
 
	// @cmember Prepare a sky dome for rendering 
 
	void Prep (); 
 
// @access Public Inline Methods 
public: 
 
	// @cmember Given a link, return the address of the sky cloub 
	 
	static CSkyClouds *FromLink (CDoubleLink *pLink) 
	{ 
		return (CSkyClouds *) ((BYTE *) pLink -  
			offsetof (CSkyClouds, m_sLink)); 
	} 
 
	// @cmember Get the type of the cloub 
	 
	_Type GetType () const 
	{ 
		return m_nType; 
	} 
 
	// @cmember Attach the cloud to the end of the given list 
 
	void InsertTail (CDoubleLink *pList) 
	{ 
		m_sLink .InsertTail (pList); 
	} 
 
	// @cmember Get the name of the texture 
 
	const char *GetTextureName () const 
	{ 
		return m_strTexture; 
	} 
 
	// @cmember Get the texture index 
 
	int GetTextureIndex () const 
	{ 
		return m_nTexture; 
	} 
 
	// @cmember Set the texture index 
 
	void SetTextureIndex (int nTextureIndex) 
	{ 
		m_nTexture = nTextureIndex; 
	} 
 
	// @cmember Get the offset 
 
	const CVector2 &GetOffset () const 
	{ 
		return m_vOffset; 
	} 
 
	// @cmember Get the current color 
 
	const CVector3 &GetCurrentColor () const 
	{ 
		return m_vCurrentColor; 
	} 
 
	// @cmember Get the scale 
 
	float GetScale () const 
	{ 
		return m_fScale; 
	} 
 
// @access Protected variables 
protected: 
 
	// @cmember Type of the body 
 
	_Type			m_nType; 
 
	// @cmember Scale of the texture 
 
	float			m_fScale; 
 
	// @cmember Texture coordinate shift rate 
 
	CVector2		m_vRate; 
 
	// @cmember Base day sky color 
 
	CVector3		m_vBaseDayColor; 
 
	// @cmember Base night sky color 
 
	CVector3		m_vBaseNightColor; 
 
	// @cmember Transition exponent 
 
	float			m_fTransitionExp; 
 
	// @cmember Current color 
	 
	CVector3		m_vCurrentColor; 
 
	// @cmember Current texture offset 
 
	CVector2		m_vOffset; 
 
	// @cmember List of all objects 
 
	CDoubleLink		m_sLink; 
 
	// @cmember Name of the body texture 
 
	CDcTString		m_strTexture; 
 
	// @cmember Index of the texture 
 
	int				m_nTexture; 
}; 
 
#endif // __SkyClouds__