//========================================================
/**
*??@file??????Camera.cpp
*
*??項目描述：?構造天空和地面
*??文件描述:??攝像機類??
*??適用平臺：?Windows98/2000/NT/XP
*??
*??作者：?????WWBOSS
*??電子郵件:??wwboss123@gmail.com
*??創建日期：?2006-12-06	
*??修改日期：?2006-12-07
*
*/?????
//========================================================

#include?“stdafx.h“
#include?“Camera.h“????????????????????/**#include?“Vector.h“????????????????????/**#include?“GLframe.h“


Camera*?Camera::m_pCamera?=?NULL;

/**?構造函數?*/
Camera::Camera（）
{
	/**?初始化向量值?*/
	Vector3?zero?=?Vector3（0.0?0.0?0.0）;		
	Vector3?view?=?Vector3（0.0?1.0?0.5）;		
	Vector3?up???=?Vector3（0.0?0.0?1.0）;		
????
	/**?初始化攝像機?*/
	m_Position	=?zero;					
	m_View		=?view;				
	m_UpVector	=?up;	
	m_Speed?????=?0.1f;
	
	m_pCamera?=?this;
}


Camera::~Camera（）
{
}

/**?設置攝像機的位置朝向和向上向量?*/
void?Camera::setCamera（?float?positionX?float?positionY?float?positionZ
				??		float?viewX?????float?viewY?????float?viewZ
						float?upVectorX?float?upVectorY?float?upVectorZ）
{
	/**?構造向量?*/
	Vector3?Position	=?Vector3（positionX?positionY?positionZ）;
	Vector3?View		=?Vector3（viewX?viewY?viewZ）;
	Vector3?UpVector	=?Vector3（upVectorX?upVectorY?upVectorZ）;

	/**?設置攝像機?*/
	m_Position?=?Position;	
	m_View?????=?View;			
	m_UpVector?=?UpVector;	
}

/**??旋轉攝像機方向??*/
void?Camera::rotateView（float?angle?float?x?float?y?float?z）
{
	Vector3?newView;

	/**?計算方向向量?*/
	Vector3?view?=?m_View?-?m_Position;		

	/**?計算?sin?和cos值?*/
	float?cosTheta?=?（float）cos（angle）;
	float?sinTheta?=?（float）sin（angle）;

	/**?計算旋轉向量的x值?*/
	newView.x??=?（cosTheta?+?（1?-?cosTheta）?*?x?*?x）		*?view.x;
	newView.x?+=?（（1?-?cosTheta）?*?x?*?y?-?z?*?sinTheta）	*?view.y;
	newView.x?+=?（（1?-?cosTheta）?*?x?*?z?+?y?*?sinTheta）	*?view.z;

	/**?計算旋轉向量的y值?*/
	newView.y??=?（（1?-?cosTheta）?*?x?*?y?+?z?*?sinTheta）	*?view.x;
	newView.y?+=?（cosTheta?+?（1?-?cosTheta）?*?y?*?y）		*?view.y;
	newView.y?+=?（（1?-?cosTheta）?*?y?*?z?-?x?*?sinTheta）	*?view.z;

	/**?計算旋轉向量的z值?*/
	newView.z??=?（（1?-?cosTheta）?*?x?*?z?-?y?*?sinTheta）	*?view.x;
	newView.z?+=?（（1?-?cosTheta）?*?y?*?z?+?x?*?sinTheta）	*?view.y;
	newView.z?+=?（cosTheta?+?（1?-?cosTheta）?*?z?*?z）		*?view.z;

	/**?更新攝像機的方向?*/
	m_View?=?m_Position?+?newView;
}

/**?用鼠標旋轉攝像機?*/
void?Camera::setViewByMouse（）
{
	POINT?mousePos;									??/**	int?middleX?=?GetSystemMetrics（SM_CXSCREEN）?>>?1;?/**	int?middleY?=?GetSystemMetrics（SM_CYSCREEN）?>>?1;?/**	float?angleY?=?0.0f;							??/**	float?angleZ?=?0.0f;		??????????????????????/**	static?float?currentRotX?=?0.0f;
	
	/**?得到當前鼠標位置?*/
	GetCursorPos（&mousePos）;						
	ShowCursor（TRUE）;
	
	/**?如果鼠標沒有移動則不用更新?*/
	if（?（mousePos.x?==?middleX）?&&?（mousePos.y?==?middleY）?）
		return;

	/**?設置鼠標位置在屏幕中心?*/
	SetCursorPos（middleX?middleY）;	
	
	/**	angleY?=?（float）（?（

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-10-26?08:48??SkyAndTerrain\
?????目錄???????????0??2018-10-26?08:48??SkyAndTerrain\.vs\
?????目錄???????????0??2018-10-26?08:48??SkyAndTerrain\.vs\SkyAndTerrain\
?????目錄???????????0??2018-10-26?09:07??SkyAndTerrain\.vs\SkyAndTerrain\v15\
?????文件???????21504??2018-10-26?09:07??SkyAndTerrain\.vs\SkyAndTerrain\v15\.suo
?????文件??????327680??2018-10-26?09:07??SkyAndTerrain\.vs\SkyAndTerrain\v15\Browse.VC.db
?????目錄???????????0??2018-10-26?08:49??SkyAndTerrain\.vs\SkyAndTerrain\v15\ipch\
?????目錄???????????0??2018-10-26?08:49??SkyAndTerrain\.vs\SkyAndTerrain\v15\ipch\AutoPCH\
?????目錄???????????0??2018-10-26?08:49??SkyAndTerrain\.vs\SkyAndTerrain\v15\ipch\AutoPCH\cbad7973147ffb9b\
?????文件??????458752??2018-10-26?09:07??SkyAndTerrain\.vs\SkyAndTerrain\v15\ipch\AutoPCH\cbad7973147ffb9b\GLframe.ipch
?????目錄???????????0??2018-10-26?08:49??SkyAndTerrain\.vs\SkyAndTerrain\v15\ipch\AutoPCH\e43f215285514a34\
?????文件??????458752??2018-10-26?08:49??SkyAndTerrain\.vs\SkyAndTerrain\v15\ipch\AutoPCH\e43f215285514a34\CAMERA.ipch
?????目錄???????????0??2018-10-26?08:48??SkyAndTerrain\Backup\
?????文件?????????915??2007-11-13?11:05??SkyAndTerrain\Backup\SkyAndTerrain.sln
?????文件????????2663??2007-11-13?11:05??SkyAndTerrain\CBMPLoader.cpp
?????文件????????1058??2007-11-13?11:05??SkyAndTerrain\CBMPLoader.h
?????文件????????6372??2007-11-13?11:05??SkyAndTerrain\Camera.cpp
?????文件????????1906??2007-11-13?11:05??SkyAndTerrain\Camera.h
?????目錄???????????0??2018-10-26?09:07??SkyAndTerrain\Debug\
?????文件????????2434??2007-11-13?11:05??SkyAndTerrain\Debug\BuildLog.htm
?????文件???????13325??2007-11-13?11:05??SkyAndTerrain\Debug\CBMPLoader.obj
?????文件???????27107??2007-11-13?11:05??SkyAndTerrain\Debug\Camera.obj
?????文件???????15963??2007-11-13?11:05??SkyAndTerrain\Debug\Font.obj
?????文件???????29346??2007-11-13?11:05??SkyAndTerrain\Debug\GLframe.obj
?????文件???????23206??2007-11-13?11:05??SkyAndTerrain\Debug\GLWindow.obj
?????文件??????192512??2007-11-13?11:05??SkyAndTerrain\Debug\SkyAndTerrain.exe
?????文件??????749352??2007-11-13?11:05??SkyAndTerrain\Debug\SkyAndTerrain.ilk
?????文件?????????302??2018-10-26?09:07??SkyAndTerrain\Debug\SkyAndTerrain.log
?????文件???????34998??2007-11-13?11:05??SkyAndTerrain\Debug\SkyAndTerrain.obj
?????文件??????764928??2007-11-13?11:05??SkyAndTerrain\Debug\SkyAndTerrain.pdb
?????文件???????24767??2007-11-13?11:05??SkyAndTerrain\Debug\SkyBox.obj
............此處省略42個文件信息