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Xuesong (Steve)
2018-08-28 00:43:47 -04:00
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C $Id: FLINT.f,v 1.1 2009/06/09 21:51:54 daven Exp $
REAL*8 FUNCTION FLINT (TINT,T1,T2,T3,F1,F2,F3)
C-----------------------------------------------------------------------
c Three-point linear interpolation function
C-----------------------------------------------------------------------
real*8 TINT,T1,T2,T3,F1,F2,F3
IF (TINT .LE. T2) THEN
IF (TINT .LE. T1) THEN
FLINT = F1
ELSE
FLINT = F1 + (F2 - F1)*(TINT -T1)/(T2 -T1)
ENDIF
ELSE
IF (TINT .GE. T3) THEN
FLINT = F3
ELSE
FLINT = F2 + (F3 - F2)*(TINT -T2)/(T3 -T2)
ENDIF
ENDIF
return
end