//#include?“stdafx.h“
#define?GLUT_DISABLE_ATEXIT_HACK?
#include?????????
#include?????????????????????????????????????
#include?“ArcBall.h“?????????????????????????????????

//軌跡球參數:
//直徑????????????????????2.0f
//半徑????????????????????1.0f
//半徑平方????????????????1.0f


void?ArcBall_t::_mapToSphere（const?Point2fT*?NewPt?Vector3fT*?NewVec）?const
{
	Point2fT?TempPt;
	GLfloat?length;

	//復制到臨時變量
	TempPt?=?*NewPt;

	//把長寬調整到[-1?...?1]區間
	TempPt.s.X?=?（TempPt.s.X?*?this->AdjustWidth）?-?1.0f;
	TempPt.s.Y?=?1.0f?-?（TempPt.s.Y?*?this->AdjustHeight）;

	//計算長度的平方
	length?=?（TempPt.s.X?*?TempPt.s.X）?+?（TempPt.s.Y?*?TempPt.s.Y）;

	//如果點映射到球的外面
	if?（length?>?1.0f）
	{
		GLfloat?norm;

		//縮放到球上
		norm?=?1.0f?/?FuncSqrt（length）;

		//設置z坐標為0
		NewVec->s.X?=?TempPt.s.X?*?norm;
		NewVec->s.Y?=?TempPt.s.Y?*?norm;
		NewVec->s.Z?=?0.0f;
	}
	//如果在球內
	else
	{
		//利用半徑的平方為1求出z坐標
		NewVec->s.X?=?TempPt.s.X;
		NewVec->s.Y?=?TempPt.s.Y;
		NewVec->s.Z?=?FuncSqrt（1.0f?-?length）;
	}
}

ArcBall_t::ArcBall_t（GLfloat?NewWidth?GLfloat?NewHeight）
{
	this->StVec.s.X?=?0.0f;
	this->StVec.s.Y?=?0.0f;
	this->StVec.s.Z?=?0.0f;

	this->EnVec.s.X?=?0.0f;
	this->EnVec.s.Y?=?0.0f;
	this->EnVec.s.Z?=?0.0f;


	Matrix4fSetIdentity（&Transform）;
	Matrix3fSetIdentity（&LastRot）;
	Matrix3fSetIdentity（&ThisRot）;

	this->isDragging?=?false;
	this->isClicked?=?false;
	this->isRClicked?=?false;
	this->isZooming?=?false;
	this->zoomRate?=?1;
	this->setBounds（NewWidth?NewHeight）;
}

void?ArcBall_t::upstate（）
{
	if?（!this->isZooming?&&?this->isRClicked）?{????????????????????//?開始拖動
		this->isZooming?=?true;????????????????????????????????????????//?設置拖動為變量為true????????
		this->LastPt?=?this->MousePt;
		this->lastZoomRate?=?this->zoomRate;
	}
	else?if?（this->isZooming）?{//正在拖動
		if?（this->isRClicked）?{????????????????//拖動????????
			Point2fSub（&this->MousePt?&this->LastPt）;
			this->zoomRate?=?this->lastZoomRate?+?this->MousePt.s.X?*?this->AdjustWidth?*?2;
		}
		else?{????????????????????????????????????????????//停止拖動
			this->isZooming?=?false;
		}
	}
	else?if?（!this->isDragging?&&?this->isClicked）?{???????????????????????????????????????????????//?如果沒有拖動
		this->isDragging?=?true;????????????????????????????????????????//?設置拖動為變量為true
		this->LastRot?=?this->ThisRot;
		this->click（&this->MousePt）;
	}
	else?if?（this->isDragging）?{
		if?（this->isClicked）?{????????????????????????????????????????????//如果按住拖動
			Quat4fT?????ThisQuat;

			this->drag（&this->MousePt?&ThisQuat）;????????????????????????//?更新軌跡球的變量
			Matrix3fSetRotationFromQuat4f（&this->ThisRot?&ThisQuat）;???????//?計算旋轉量
			Matrix3fMulMatrix3f（&this->ThisRot?&this->LastRot）;
			Matrix4fSetRotationFromMatrix3f（&this->Transform?&this->ThisRot）;
		}
		else????????????????????????????????????????????????????????//?如果放開鼠標，設置拖動為false
			this->isDragging?=?false;
	}
}

//按下鼠標記錄當前對應的軌跡球的位置
void????ArcBall_t::click（co

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

????..A..H.?????27648??2018-03-29?14:12??MyArcball\.vs\MyArcball\v14\.suo

?????文件?????230912??2018-03-29?14:11??MyArcball\Debug\MyArcball.exe

?????文件?????943380??2018-03-29?14:11??MyArcball\Debug\MyArcball.ilk

?????文件????1560576??2018-03-29?14:11??MyArcball\Debug\MyArcball.pdb

?????文件???????3901??2018-03-28?23:25??MyArcball\MyArcball\Arcball.cpp

?????文件??????11211??2018-03-28?15:41??MyArcball\MyArcball\ArcBall.h

?????文件??????34441??2018-03-29?14:07??MyArcball\MyArcball\Debug\Arcball.obj

?????文件?????823261??2018-03-29?14:07??MyArcball\MyArcball\Debug\loadmodel.obj

?????文件???????1011??2018-03-29?14:12??MyArcball\MyArcball\Debug\MyArcball.log

?????文件?????249722??2018-03-29?14:12??MyArcball\MyArcball\Debug\MyArcball.obj

?????文件???????2070??2018-03-29?14:12??MyArcball\MyArcball\Debug\MyArcball.tlog\CL.command.1.tlog

?????文件??????55458??2018-03-29?14:12??MyArcball\MyArcball\Debug\MyArcball.tlog\CL.read.1.tlog

?????文件???????1596??2018-03-29?14:12??MyArcball\MyArcball\Debug\MyArcball.tlog\CL.write.1.tlog

?????文件???????1920??2018-03-29?14:11??MyArcball\MyArcball\Debug\MyArcball.tlog\link.command.1.tlog

?????文件???????4572??2018-03-29?14:11??MyArcball\MyArcball\Debug\MyArcball.tlog\link.read.1.tlog

?????文件????????776??2018-03-29?14:11??MyArcball\MyArcball\Debug\MyArcball.tlog\link.write.1.tlog

?????文件????????205??2018-03-29?14:11??MyArcball\MyArcball\Debug\MyArcball.tlog\MyArcball.lastbuildstate

?????文件?????863232??2018-03-29?14:12??MyArcball\MyArcball\Debug\vc140.idb

?????文件?????577536??2018-03-29?14:12??MyArcball\MyArcball\Debug\vc140.pdb

?????文件??????10611??2018-03-29?14:05??MyArcball\MyArcball\loadmodel.cpp

?????文件???????1107??2018-03-29?14:05??MyArcball\MyArcball\loadmodel.h

?????文件???????6293??2018-03-29?14:12??MyArcball\MyArcball\MyArcball.cpp

?????文件???????7846??2018-03-29?14:09??MyArcball\MyArcball\MyArcball.vcxproj

?????文件???????1345??2018-03-29?14:09??MyArcball\MyArcball\MyArcball.vcxproj.filters

?????文件??????66707??2017-04-18?19:10??MyArcball\MyArcball\obj\bird.obj

?????文件????6656387??2018-03-27?23:19??MyArcball\MyArcball\obj\color-tomota.obj

?????文件??????65024??2018-03-28?23:55??MyArcball\MyArcball\obj\rock.obj

?????文件?????394444??2017-04-18?19:10??MyArcball\MyArcball\obj\rubby.obj

?????文件??????17844??2017-04-18?19:10??MyArcball\MyArcball\obj\torus.obj

?????文件????6659036??2018-03-27?22:26??MyArcball\MyArcball\obj\tri-tomato.obj

............此處省略15個文件信息