fft_grids.h

基于java的3d开发库。对坐java3d的朋友有很大的帮助。

/***************************************************************************
  **************************************************************************
  
                Spherical Harmonic Transform Kit 2.7
  
  
   Contact: Peter Kostelec
            [e-mail]
  
  
   Copyright 1997-2003  Sean Moore, Dennis Healy,
                        Dan Rockmore, Peter Kostelec
  
  
   Copyright 2004  Peter Kostelec, Dan Rockmore


     SpharmonicKit is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 2 of the License, or
     (at your option) any later version.
  
     SpharmonicKit 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 General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  
  
   Commercial use is absolutely prohibited.
  
   See the accompanying LICENSE file for details.
  
  ************************************************************************
  ************************************************************************/

#ifndef _FFT_GRIDS_H
#define _FFT_GRIDS_H

#ifndef FFTPACK

extern void grid_fourier( double * ,
			  double * ,
			  double * ,
			  double * ,
			  int ,
			  double * );

extern void grid_invfourier( double * ,
			     double * ,
			     double * ,
			     double * ,
			     int ,
			     double * );


#else    /* if FFTPACK *is* defined */

extern double *precomp_fft( int );

extern void grid_fourier_FFTPACK( double * ,
				  int ,
				  double * );

extern void grid_invfourier_FFTPACK( double * ,
				     int ,
				     double * );
#endif /* FFTPACK */

#endif /* _FFT_GRIDS_H */