C++博客-. . . . . . . . . . . . . . Blog Garden' C plus plus (My technology Impire!)-最新评论http://www.cppblog.com/stevennash/CommentsRSS.aspx................................................................ It‘s a age of economic globalization and Infomation globalization........................................zh-cnFri, 31 Oct 2008 06:10:02 GMTFri, 31 Oct 2008 06:10:02 GMTcnblogsre: SQL Server去除冗余数据http://www.cppblog.com/stevennash/archive/2007/12/29/13264.html#39909jsnjsnSat, 29 Dec 2007 02:58:00 GMThttp://www.cppblog.com/stevennash/archive/2007/12/29/13264.html#39909如果表的记录很多 你这样不要写死的啊 ？？

jsn 2007-12-29 10:58 发表评论
]]>欢迎去中国商业智能网讨论http://www.cppblog.com/stevennash/archive/2007/08/24/13274.html#30761chinabichinabiFri, 24 Aug 2007 06:48:00 GMThttp://www.cppblog.com/stevennash/archive/2007/08/24/13274.html#30761http://www.chinabi.net

chinabi 2007-08-24 14:48 发表评论
]]>re: 核弹后的日本,值得思考的历史！[未登录]http://www.cppblog.com/stevennash/archive/2007/08/09/14118.html#29649orangeorangeThu, 09 Aug 2007 08:54:00 GMThttp://www.cppblog.com/stevennash/archive/2007/08/09/14118.html#29649

orange 2007-08-09 16:54 发表评论
]]>re: 透明屏幕！超酷苹果iMac电脑设计图赏[未登录]http://www.cppblog.com/stevennash/archive/2007/08/09/13826.html#29648orangeorangeThu, 09 Aug 2007 08:53:00 GMThttp://www.cppblog.com/stevennash/archive/2007/08/09/13826.html#29648

orange 2007-08-09 16:53 发表评论
]]>re: 英特尔四核CPU系统曝光 明年一季度上市http://www.cppblog.com/stevennash/archive/2007/06/04/13830.html#25520网友网友Mon, 04 Jun 2007 14:19:00 GMThttp://www.cppblog.com/stevennash/archive/2007/06/04/13830.html#25520http://blogs.intel.com/china

网友 2007-06-04 22:19 发表评论
]]>re: My Personal English Resumehttp://www.cppblog.com/stevennash/archive/2007/05/29/24067.html#25071supergrasssupergrassTue, 29 May 2007 07:23:00 GMThttp://www.cppblog.com/stevennash/archive/2007/05/29/24067.html#25071

supergrass 2007-05-29 15:23 发表评论
]]>re: [引] 键盘控制3D场景漫游http://www.cppblog.com/stevennash/archive/2006/12/13/13329.html#16384kellandkellandWed, 13 Dec 2006 11:24:00 GMThttp://www.cppblog.com/stevennash/archive/2006/12/13/13329.html#16384#define AFX_CAMERA_H

#include "d3dx9.h"
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
//-------------------------------------------------------------------
//摄像机类，主要用于控制，更新2D，3D视图变换矩阵，投影变换矩阵
//实现计算鼠标指针射线(从摄像机开始穿过鼠标指针的一条3D空间的射线)
//-------------------------------------------------------------------
class CCamera
{
public:
CCamera(LPDIRECT3DDEVICE9 pDevice,
LPD3DXVECTOR3 pos);
virtual ~CCamera();
void YawPitchAt(float yaw,float pitch);
void YawPitchPos(float yaw,float pitch);
void Update3DMatrix();
void Update2DMatrix();
void AimTo(D3DVECTOR *pLookAt);
//获得观察点坐标
void GetLookAt(D3DVECTOR *pLookAt)
{
pLookAt->x= m_vPos.x+m_Distance*cosf(m_Pitch)*cosf(m_Yaw);
pLookAt->y= m_vPos.y+m_Distance*sinf(m_Pitch);
pLookAt->z= m_vPos.z+m_Distance*cosf(m_Pitch)*sinf(m_Yaw);

};

//获得摄像机坐标
D3DVECTOR* GetPos()
{
return &m_vPos;
}
//获得摄像机坐标
void GetPos(D3DVECTOR *vPos)
{ vPos->x=m_vPos.x;
vPos->y=m_vPos.y;
vPos->z=m_vPos.z;
};
//获得方向向量(单位向量)
void GetDirection(D3DVECTOR *vDir)
{
vDir->x=cosf(m_Pitch)*cosf(m_Yaw);
vDir->y=sinf(m_Pitch);
vDir->z=cosf(m_Pitch)*sinf(m_Yaw);
};
//-----------------------------------------------------------------
//根据鼠标坐标，计算射线
//实现计算鼠标指针射线(从摄像机开始穿过鼠标指针的一条3D空间的射线)
//-----------------------------------------------------------------
void GetCursorRayDir(POINT ptCursor,D3DVECTOR *vPickRayDir)
{
D3DXMATRIXA16 matProj;
D3DXMatrixPerspectiveFovLH(&matProj,D3DX_PI/4,4/3.0f,1.0f,6000.0f);
//计算屏幕空间的坐标(-1,-1)～(1,1)
D3DXVECTOR3 v;
v.x = ( (-1+2* ptCursor.x /float( m_scrWidth) ) /*- 1*/ ) / matProj._11;
v.y = ( ( 1-2* ptCursor.y /float( m_scrHeight)) /*- 1*/ ) / matProj._22;
v.z = 1.0f;

//获得视图变换矩阵的逆矩阵
D3DVECTOR vLookAt;
GetLookAt(&vLookAt);
D3DXMATRIXA16 matView, m;
D3DXMatrixLookAtLH(&matView,(D3DXVECTOR3*)&m_vPos,
(D3DXVECTOR3*)&vLookAt,&D3DXVECTOR3(0,1,0));

D3DXMatrixInverse( &m, NULL, &matView );

//把上述坐标转换成世界坐标
vPickRayDir->x = v.x*m._11 + v.y*m._21 + v.z*m._31;
vPickRayDir->y = v.x*m._12 + v.y*m._22 + v.z*m._32;
vPickRayDir->z = v.x*m._13 + v.y*m._23 + v.z*m._33;
};

//移动焦点坐标(实质上是移动摄像机)
void MoveAtTo(D3DXVECTOR3 *vLookAt)
{

m_vPos.x=vLookAt->x-m_Distance*cosf(m_Pitch)*cosf(m_Yaw);
m_vPos.y=vLookAt->y-m_Distance*sinf(m_Pitch);
m_vPos.z=vLookAt->z-m_Distance*cosf(m_Pitch)*sinf(m_Yaw);


}
//移动摄像机
void MovePosTo(D3DXVECTOR3 *pV)
{
m_vPos=*pV;
}

//返回屏幕高度，宽度
long GetScreenHeight() {return m_scrHeight ;};
long GetScreenWidth() {return m_scrWidth;};

//移动摄像机，在摄像机空间,也就是沿着摄像机朝向前后移动，和侧向左右移动
void Move(float dSide,float dForward);


protected:

float m_Yaw,m_Pitch;
float m_Distance;
long m_scrWidth;
long m_scrHeight;

D3DXVECTOR3 m_vPos;
LPDIRECT3DDEVICE9 m_pDevice;
public:
D3DXMATRIX matView;
D3DXMATRIX matProjection;
D3DXMATRIX matIdentity;
D3DXMATRIX matOrtho;
//摄像机从m_vPos观察，方向为:从m_vPos水平偏角为yaw,仰角为pitch
};

#endif // !defined(AFX_CAMERA_H)

kelland 2006-12-13 19:24 发表评论
]]>re: [引] 键盘控制3D场景漫游http://www.cppblog.com/stevennash/archive/2006/12/13/13329.html#16383kellandkellandWed, 13 Dec 2006 11:20:00 GMThttp://www.cppblog.com/stevennash/archive/2006/12/13/13329.html#16383

kelland 2006-12-13 19:20 发表评论
]]>re: [引] 键盘控制3D场景漫游http://www.cppblog.com/stevennash/archive/2006/12/13/13329.html#16381kellandkellandWed, 13 Dec 2006 11:00:00 GMThttp://www.cppblog.com/stevennash/archive/2006/12/13/13329.html#16381有机会的话可以聊聊 QQ4603988

kelland 2006-12-13 19:00 发表评论
]]>re: [转] 如何走好编程入门之路http://www.cppblog.com/stevennash/archive/2006/10/04/13325.html#13348胡铸鑫胡铸鑫Wed, 04 Oct 2006 11:11:00 GMThttp://www.cppblog.com/stevennash/archive/2006/10/04/13325.html#13348

胡铸鑫 2006-10-04 19:11 发表评论
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