www.pudn.com > tomohide_fur.03.13.02.zip > trackball.h

//----------------------------------------------------------------------------- 
// File: trackball.h 
// 
// Copyright (C) 2001-2002 Tomohide Kano. All rights reserved. 
//----------------------------------------------------------------------------- 
 
extern void trackball(D3DXQUATERNION *q, const D3DXVECTOR2 *p1, const D3DXVECTOR2 *p2);