#include?
#include?“ArcBall.h“

//軌跡球參數(shù):
//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(fù)制到臨時(shí)變量
????TempPt?=?*NewPt;

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

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

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

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

????????//設(shè)置z坐標(biāo)為0
????????NewVec->s.X?=?TempPt.s.X?*?norm;
????????NewVec->s.Y?=?TempPt.s.Y?*?norm;
????????NewVec->s.Z?=

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????文件???????4299??2014-03-13?11:14??guijiqiu\ArcBall.cpp

?????文件??????12735??2014-03-13?11:08??guijiqiu\ArcBall.h

?????文件????????387??2014-03-12?22:24??guijiqiu\guijiqiu.pro

?????文件??????17903??2014-03-14?10:46??guijiqiu\guijiqiu.pro.user

?????文件????????175??2014-03-12?22:22??guijiqiu\main.cpp

?????文件???????6100??2014-03-14?10:46??guijiqiu\widget.cpp

?????文件???????6062??2014-03-14?15:05??guijiqiu\widget.cpp.autosave

?????文件????????546??2014-03-13?09:49??guijiqiu\widget.h

?????目錄??????????0??2014-03-14?15:05??guijiqiu

-----------?---------??----------?-----??----

????????????????48207????????????????????9