#include?“StdAfx.h“
#include?“ArcBall.h“
#include“Matrix.h“
#include

ArcBall::ArcBall（void）
{
	m_rotation.SetIdentity（）;
}

ArcBall::~ArcBall（void）
{
}

void?ArcBall::SetBound（int?Width?int?height）
{

		m_winWidth=Width;
		m_winHeight=height;
}

Point3D?ArcBall::CoordToSphere（int?x?int?y）
{
	double?xScale?=?2.0?/?m_winWidth;
	double?yScale?=?2.0?/?m_winHeight;
	
	double?xPos?=?x?*?xScale?-?1;
	double?yPos?=?1?-?y?*?yScale;
	double?zPos?=?0.0;

	double?len?=?xPos?*?xPos?+?yPos?*?yPos;
	if?（len?	{
		zPos?=?sqrt（1.0?-?len）;
	}

	return?Point3D（xPos?yPos?zPos）;
}
void?ArcBall::click（const?CPoint?&pt）
{
	m_ptlast?=?CoordToSphere（pt.xpt.y）;
}

void?ArcBall::drag（const?CPoint?&pt）
{
	Point3D?ptCur?=??CoordToSphere（pt.xpt.y）;
	CVector3D?axis?=?m_ptlast?*?ptCur;
	m_ptlast.Normalize（）;
	ptCur.Normalize（）;

	double?c?=?m_ptlast?%?ptCur;
	double?angle?=?2*acos（c）;

	CMatrix?matrix?=?CMatrix::GetRotationMatrix（angleaxis[0]axis[1]axis[2]）;
	m_rotation?=?matrix?*?m_rotation;
	m_ptlast?=?ptCur;
}
double?*ArcBall::GetRotationData（）
{
	static?double?data[16];

	data[0]?=m_rotation[0][0];
	data[1]?=m_rotation[1][0];
	data[2]?=m_rotation[2][0];
	data[3]?=?0;

	data[4]?=?m_rotation[0][1];
	data[5]?=?m_rotation[1][1];
	data[6]?=?m_rotation[2][1];
	data[7]?=?0;

	data[8]?=m_rotation[0][2];
	data[9]?=?m_rotation[1][2];
	data[10]?=?m_rotation[2][2];
	data[11]?=?0;

	data[12]?=?0;
	data[13]?=?0;
	data[14]?=?0;
	data[15]?=?1;

	return?data;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-01-02?09:14??paint_cylinder\
?????目錄???????????0??2017-12-13?00:34??paint_cylinder\Debug\
?????文件??????252416??2017-12-13?00:34??paint_cylinder\Debug\paint_cylinder.exe
?????文件?????1897296??2017-12-13?00:34??paint_cylinder\Debug\paint_cylinder.ilk
?????文件?????5524480??2017-12-13?00:34??paint_cylinder\Debug\paint_cylinder.pdb
?????目錄???????????0??2017-12-27?08:08??paint_cylinder\ipch\
?????目錄???????????0??2018-01-02?09:14??paint_cylinder\ipch\paint_cylinder-3829da0b\
?????目錄???????????0??2018-01-02?09:12??paint_cylinder\paint_cylinder\
?????文件????????1548??2017-12-12?21:00??paint_cylinder\paint_cylinder\ArcBall.cpp
?????文件?????????384??2017-12-12?21:00??paint_cylinder\paint_cylinder\ArcBall.h
?????目錄???????????0??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\
?????文件???????16563??2017-12-12?21:08??paint_cylinder\paint_cylinder\Debug\ArcBall.obj
?????文件???????67236??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\CL.read.1.tlog
?????文件????????7588??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\CL.write.1.tlog
?????文件???????89298??2017-12-12?21:08??paint_cylinder\paint_cylinder\Debug\MainFrm.obj
?????文件???????15162??2017-12-12?21:08??paint_cylinder\paint_cylinder\Debug\Matrix.obj
?????文件????????9680??2017-12-12?21:09??paint_cylinder\paint_cylinder\Debug\Point3D.obj
?????文件????????6298??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\cl.command.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link-cvtres.read.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link-cvtres.write.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.13012-cvtres.read.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.13012-cvtres.write.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.13012.read.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.13012.write.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.1364-cvtres.read.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.1364-cvtres.write.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.1364.read.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.1364.write.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.2472-cvtres.read.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.2472-cvtres.write.1.tlog
?????文件???????????2??2017-12-13?00:34??paint_cylinder\paint_cylinder\Debug\link.2472.read.1.tlog
............此處省略71個文件信息