C ++********************************************************************
C                                                                      *
C   PRJCQ.F             SPEEDED UP  FEB 2000 ARDEAN LEITH              *
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  PRJCQ(CUBE,LTC,DM,B,N,IPCUBE,NN)                                    *                                                                   *
C                                                                      *
C  PURPOSE:  PROJECTS CUBE INTO B                                      *                                                        *
C                                                                      *
C  PARAMETERS:  CUBE    INPUT VOLUME                             SENT  *
C               B       OUTPUT PROJECTION IMAGE                  RET.  *
C               NN      CUBE DIMENSIONS                          SENT  *
C               N       IMAGE DIMENSION (SQUARE)                 SENT  *
C                                                                      *
C IMAGE_PROCESSING_ROUTINE                                             *
C                                                                      *
C        0         2         3         4         5         6         7 *
C23456789012345678901234567890123456789012345678901234567890123456789012
C***********************************************************************

        SUBROUTINE PRJCQ(CUBE,LTC,DM,B,N,IPCUBE,NN)

        DIMENSION     DM(9),CUBE(LTC),B(N,N)
        INTEGER       IPCUBE(5,NN)
        COMMON /PAR/  LDP,NM,LDPNM

        DO    I=1,NN
           XB = (IPCUBE(3,I)-LDP)*DM(1)+(IPCUBE(4,I)-LDP)*DM(2)+
     &          (IPCUBE(5,I)-LDP)*DM(3) + LDPNM
           YB = (IPCUBE(3,I)-LDP)*DM(4)+(IPCUBE(4,I)-LDP)*DM(5)+
     &          (IPCUBE(5,I)-LDP)*DM(6) + LDPNM

           DO J=IPCUBE(1,I),IPCUBE(2,I)
              IQX    = IFIX(XB)
              IQY    = IFIX(YB)

              CT     = CUBE(J)
              DIPX   = (XB - IQX)
              DIPY   = (YB - IQY)  * CT

              DIPY1M = (CT - DIPY)
              DIPX1M = (1.0 - DIPX)

              B(IQX,IQY)    = B(IQX,IQY)     + DIPX1M * DIPY1M 
              B(IQX+1,IQY)  = B(IQX+1,IQY)   + DIPX   * DIPY1M 
              B(IQX,IQY+1)  = B(IQX,IQY+1)   + DIPX1M * DIPY         
              B(IQX+1,IQY+1)= B(IQX+1,IQY+1) + DIPX   * DIPY         

              XB = XB + DM(1)
              YB = YB + DM(4)
           ENDDO
        ENDDO
        END


#ifdef NEVER
C             B(IQX,IQY)    = B(IQX,IQY)     + (1.0-DIPX)*(1.0-DIPY)*CT
C             B(IQXP1,IQY)  = B(IQXP1,IQY)   +      DIPX *(1.0-DIPY)*CT
C             B(IQX,IQYP1)  = B(IQX,IQYP1)   + (1.0-DIPX)*     DIPY *CT
C             B(IQXP1,IQYP1)= B(IQXP1,IQYP1) +      DIPX *     DIPY *CT

#endif