C ++********************************************************************
C                                                                      *
C                                                                      *
C                                                                      *
C **********************************************************************
C=* FROM: SPIDER - MODULAR IMAGE PROCESSING SYSTEM.   AUTHOR: J.FRANK  *
C=* Copyright (C) 1985-2005  Health Research Inc.                      *
C=*                                                                    *
C=* HEALTH RESEARCH INCORPORATED (HRI),                                *   
C=* ONE UNIVERSITY PLACE, RENSSELAER, NY 12144-3455.                   *
C=*                                                                    *
C=* Email:  spider@wadsworth.org                                       *
C=*                                                                    *
C=* This program is free software; you can redistribute it and/or      *
C=* modify it under the terms of the GNU General Public License as     *
C=* published by the Free Software Foundation; either version 2 of the *
C=* License, or (at your option) any later version.                    *
C=*                                                                    *
C=* This program is distributed in the hope that it will be useful,    *
C=* but WITHOUT ANY WARRANTY; without even the implied warranty of     *
C=* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU  *
C=* General Public License for more details.                           *
C=*                                                                    *
C=* You should have received a copy of the GNU General Public License  *
C=* along with this program; if not, write to the                      *
C=* Free Software Foundation, Inc.,                                    *
C=* 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.      *
C=*                                                                    *
C **********************************************************************
C                                                                      *
C                                                                      *
C                                                                      *
C  PURPOSE:                                                            *
C                                                                      *
C  PARAMETERS:                                                         *
C                                                                      *
C        0         2         3         4         5         6         7 *
C23456789012345678901234567890123456789012345678901234567890123456789012
C***********************************************************************

	SUBROUTINE  PRJC0(CUBE,LTC,DM,B,NSAM,IPCUBE,NN)

        DIMENSION  DM(9)
	DIMENSION  CUBE(LTC),B(nsam)
	INTEGER  IPCUBE(5,NN)
	COMMON /PAR/  LDPX,LDPY,LDPZ,LDPNMX,LDPNMY

	DO    I=1,NN
	XB=(IPCUBE(3,I)-LDPX)*DM(1)+(IPCUBE(5,I)-LDPZ)*DM(3)
	DO    J=IPCUBE(1,I),IPCUBE(2,I)
	IQX=IFIX(XB+FLOAT(LDPNMX))
	DIPX=XB+LDPNMX-IQX
	CT=CUBE(J)
	B(IQX)  =B(IQX)    +(1.0-DIPX)*CT
	B(IQX+1)=B(IQX+1)  +     DIPX *CT
	XB=XB+DM(1)
	ENDDO
	ENDDO
	END