48 lines
1.3 KiB
C++
48 lines
1.3 KiB
C++
/*
|
|
* The 3D Studio File Format Library
|
|
* Copyright (C) 1996-2001 by J.E. Hoffmann <je-h@gmx.net>
|
|
* All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation; either version 2.1 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
|
|
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
|
|
* License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with this program; if not, write to the Free Software Foundation,
|
|
* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* $Id$
|
|
*/
|
|
#define LIB3DS_EXPORT
|
|
#include <lib3ds_float.h>
|
|
|
|
|
|
/*!
|
|
* \defgroup float Floating Point Mathematics
|
|
*
|
|
* \author J.E. Hoffmann <je-h@gmx.net>
|
|
*/
|
|
|
|
|
|
/*!
|
|
* \ingroup float
|
|
*/
|
|
Lib3dsFloat
|
|
lib3ds_float_cubic(Lib3dsFloat a, Lib3dsFloat p, Lib3dsFloat q, Lib3dsFloat b, Lib3dsFloat t)
|
|
{
|
|
Lib3dsDouble x,y,z,w;
|
|
|
|
x=2*t*t*t - 3*t*t + 1;
|
|
y=-2*t*t*t + 3*t*t;
|
|
z=t*t*t - 2*t*t + t;
|
|
w=t*t*t - t*t;
|
|
return((Lib3dsFloat)(x*a + y*b + z*p + w*q));
|
|
}
|
|
|