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*DECK DETSPL3
SUBROUTINE DETSPL3(XCNTR ,YCNTR ,ZCNTR ,
> NXMAX ,NYMAX ,NZMAX ,
> FXYZ ,FXY ,FDUMMY,
> F2X ,F2Y ,F2Z ,
> XINT ,YINT ,ZINT ,
> FP1 ,FP2 ,
> FYINT ,FZINT ,FINTRP,
> N1 ,N2 ,N3 ,ITYPE)
*
*-----------------------------------------------------------------------
*
*Purpose:
* Perform spline interpolation.
*
*Copyright:
* Copyright (C) 2010 Ecole Polytechnique de Montreal.
*
*Author(s):
* E. Varin
*
*
*Parameters:
* XCNTR
* YCNTR
* ZCNTR
* NXMAX
* NYMAX
* NZMAX
* FXYZ
* FXY
* FDUMMY
* F2X
* F2Y
* F2Z
* XINT
* YINT
* ZINT
* FP1
* FP2
* FYINT
* FZINT
* FINTRP
* N1
* N2
* N3
* ITYPE
*
*-----------------------------------------------------------------------
*
REAL*4 XCNTR(NXMAX) ,YCNTR(NYMAX) ,ZCNTR(NZMAX),
> FXYZ(N1,N2,N3),FXY(NXMAX,NYMAX) ,
> FYINT(NYMAX) ,FZINT(NZMAX) ,
> F2X(NXMAX) ,F2Y(NYMAX) ,F2Z(NZMAX),
> FDUMMY(NXMAX)
*----
* INTERPOLATE IN TWO DIMENSIONS AT XINT,YINT FOR EACH Z PLANE
*----
DO 10 K=1,NZMAX
DO 20 J=1,NXMAX
DO 30 I=1,NYMAX
IF (ITYPE.EQ.1) THEN
FXY(J,I) = FXYZ(J,I,K)
ELSE IF (ITYPE.EQ.2) THEN
FXY(J,I) = FXYZ(K,J,I)
ELSE IF (ITYPE.EQ.3) THEN
FXY(J,I) = FXYZ(I,K,J)
ELSE
CALL XABORT('DETSPL3: ERROR IN SPLIN3')
ENDIF
30 CONTINUE
20 CONTINUE
CALL DETSPL2(XCNTR,YCNTR,NXMAX ,NYMAX ,FXY,
> FP1 ,FP2 ,F2X ,F2Y ,FDUMMY,
> XINT ,YINT ,FYINT ,FXYINT)
FZINT(K) = FXYINT
10 CONTINUE
*----
* CALCULATE SECOND DERIVATIVE ALONG Z AT XINT,YINT
*----
CALL DETSPLI(ZCNTR,FZINT,NZMAX,FP1,FP2,F2Z)
*----
* INTERPOLATE ALONG Z FOR XINT,YINT
*----
CALL DETSPLI2(ZCNTR,FZINT,F2Z,NZMAX,ZINT,FINTRP)
RETURN
END
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