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 *
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C***********************************************************************

        SUBROUTINE MRCALERR(XYPTS,RFPTS,ERTOT,ERVW,ERPT)

C       CALCULATE ALL POSSIBLE ERRORS

        PARAMETER (LV=300)
        PARAMETER (LS=256)
        LOGICAL*1   PTACTIVE(LS,LV),PARAMQ(4)
        COMMON /GENERAL/PTACTIVE,NUMPTS(LV),NTVW,NTPT,CIR(2),PARAMQ
        DIMENSION         XYPTS(2,LS,LV),RFPTS(2,LS,LV)
        DIMENSION         ERVW(LV),ERPT(LS),NERPT(LS)
	DOUBLE PRECISION  ERTVR,ERTOT

       ERTOT=0.0D0
C      ERTVR=0.0D0

      NTE=0
      DO  IPT=1,NTPT
         ERPT(IPT)  = 0.0
         NERPT(IPT) = 0
      ENDDO

      DO  IVIEW=1,NTVW
        ERVW(IVIEW)=0.0
          DO IPT=1,NTPT
            IF(PTACTIVE(IPT,IVIEW)) THEN
              ERNOW= (XYPTS(1,IPT,IVIEW)-RFPTS(1,IPT,IVIEW))**2 +
     &               (XYPTS(2,IPT,IVIEW)-RFPTS(2,IPT,IVIEW))**2
              ERVW(IVIEW)=ERVW(IVIEW)+ERNOW
              ERPT(IPT)=ERPT(IPT)+ERNOW
              NERPT(IPT)=NERPT(IPT)+1
              ERTOT=ERTOT+ERNOW
C             ERTVR=ERTVR+ERNOW*ERNOW
              NTE=NTE+1
            ENDIF
      ENDDO
      ERVW(IVIEW)=SQRT(ERVW(IVIEW)/NUMPTS(IVIEW))
      ENDDO

      DO  IPT=1,NTPT
         ERPT(IPT)=SQRT(ERPT(IPT)/NERPT(IPT))
      ENDDO

      ERTOT=SQRT(ERTOT/NTE)

C     ERTVR=DSQRT((ertvr-ertot*ertot*nte)/(nte-1))
c     print *,'  Average and sigma of error per point ',ertot,ertvr

cc    detect points with error over 3*sigma

c      DO 700 IVIEW=1,NTVW
c          DO 700 IPT=1,NTPT
c            IF(PTACTIVE(IPT,IVIEW)) THEN
c              ERNOW= SQRT(
c     &               (XYPTS(1,IPT,IVIEW)-RFPTS(1,IPT,IVIEW))**2 +
c     &               (XYPTS(2,IPT,IVIEW)-RFPTS(2,IPT,IVIEW))**2    )
c		if(ernow.gt.3*ertvr)  then
c		print *,' point #',ipt,' view #',iview,' error=',ernow
c		endif
c	    endif
c700	continue

      END