C
C Program CRTRAY converting the unformatted output of program CRT into C formatted files with rays suitable for plotting. C C Version: 5.20 C Date: 1998, November 9 C C Coded by: Ludek Klimes C Department of Geophysics, Charles University Prague, C Ke Karlovu 3, 121 16 Praha 2, Czech Republic, C E-mail: klimes@seis.karlov.mff.cuni.cz C C....................................................................... C C This simple conversion program may serve as an example how to read and C process output files of the complete ray tracing program CRT. C Reading the output files is completed by a simple invocation of C subroutine AP00 of file 'ap.for', called by means of subroutine CRTOUT C of file 'crtout.for'. C C The structure of the output file with rays is an extension of the C general file form LINES C designed to store 3-D curves, e.g., for the purposes of plotting. C C....................................................................... C C C Description of data files: C C Main input data read from external interactive device (*): C The data consist of character strings and integers, read by list C directed (free format) input. The strings have thus to be C enclosed in apostrophes. The interactive * external unit may be C redirected to the file containing the data. C (1) 'REC','SRC','RAYPOINTS','INITIALPOINTS','RAYS',NQ,KALL C 'REC'...If non-blank, the name of the file with the names of the C receiver points. The names are then used within the C strings describing the two-point rays. Otherwise, the C two-point rays are denoted by the receiver index. C Description of file REC C 'SRC'...If non-blank, the name of the file with the name of the C source point. The name is then used within the strings C describing the rays. C Description of file SRC C 'RAYPOINTS'... File with the quantities stored along rays (see C C.R.T.5.5.1). C 'INITIALPOINTS'... File with the quantities at the initial points C of rays, corresponding to file 'RAYPOINTS' (see C C.R.T.6.1). C 'RAYS'..Name of the output formatted file with rays. This file is C designed, for instance, as input file for plotting rays. C Description of file RAYS C NQ... Number of reals in each output line. C If NQ exceeds parameter MQ (see the code below), it is set C to MQ. C The output reals represent: C 1. X1-coordinate. C 2. X2-coordinate. C 3. X3-coordinate. C 4. Travel time. C 5. P1 slowness-vector component. C 6. P2 slowness-vector component. C 7. P3 slowness-vector component. C 8. Real part of ray amplitude, normalized to 1 at an C initial surface or along on a unit sphere around a C point source, corresponding to P- or S1-polarization at C the initial point of the ray. C 9. Imaginary part of ray amplitude corresponding to P- or C S1-polarization at the initial point of the ray. C Printed only if greater than 0.000001 in abs value. C 10. Real part of ray amplitude corresponding to C S2-polarization at the initial point of the ray. C Printed only if greater than 0.000001 in abs value. C 11. Imaginary part of ray amplitude corresponding C S2-polarization at the initial point of the ray. C Printed only if greater than 0.000001 in abs value. C KALL... KALL.LE.0: only two-point rays are considered, C KALL.GE.1: all rays are considered. C Absolute value specifies the form of the strings C describing individual points. Here are some examples: C ABS(KALL)=0: 'rec 13' C 'recnam' C 'srcnam TO recnam' C ABS(KALL)=1: 'RAY 112' C 'RAY 112, REC 13' C 'RAY 112 TO recnam' C 'RAY 112 FROM srcnam' C 'RAY 112 FROM srcnam TO recnam' C ABS(KALL)=2: 'WAVE 1, RAY 112' C 'WAVE 1, RAY 112, REC 13' C 'WAVE 1, RAY 112 TO recnam' C 'WAVE 1, RAY 112 FROM srcnam' C 'WAVE 1, RAY 112 FROM srcnam TO recnam' C Values KALL=0 and KALL=1 specify the briefest strings. C Default: 'REC'=' ', 'SRC'=' ', 'RAYPOINTS'='r01.out', C 'INITIALPOINTS'='r01i.out', 'RAYS'='rays.out', NQ=4, KALL=0. C C Input unformatted file RAYPOINTS: C See the description within source code file 'writ.for'. C Description of file RAYPOINTS C C Input unformatted file INITIALPOINTS: C See the description within source code file 'writ.for'. C Description of file INITIALPOINTS C C C Output formatted file RAYS (format LIN): C (1) / (a slash). C (2) For each ray (2.1), (2.2), and (2.3): C (2.1) 'RAYTXT',/ C 'RAYTXT'... String in apostrophes describing the ray. See the C description of input parameter KALL. C /... An obligatory slash after the string, in place of the C coordinates of the reference point. C (2.2) For each point of the ray (2.1.1): C (2.2.1) (OUT(I),I=1,NQ),/ C (OUT(I),I=1,NQ)... Output quantities at the ray point, see the C description of input parameter NQ. C /... An obligatory slash after at the end of line, in place C where the slowness vector components could be written. C For default NQ=4: C (2.2.1) X1,X2,X3,TT,/ C X1,X2,X3... Coordinates of the point of the ray. C TT... Arrival time at the point. C (2.3) / (a slash). C (3) / (a slash). C Description of format LIN C C----------------------------------------------------------------------- C C Common block /POINTC/ to store the results of complete ray tracing: INCLUDE 'pointc.inc' C pointc.inc C None of the storage locations of the common block are altered. C C Subroutines and external functions required: EXTERNAL CRTOUT,FORM2 C CRTOUT..File 'crtout.for'. C AP00... File 'ap.for' (called by CRTOUT). C FORM2...File 'forms.for'. C FORM1...File 'forms.for' (called by FORM2). C C----------------------------------------------------------------------- C C Auxiliary storage locations: INTEGER LU1,LU2,LU3,MQ,MPTS,MOUT PARAMETER (LU1=1,LU2=2,LU3=3) PARAMETER (MQ=11,MPTS=2,MOUT=MQ*MPTS) C 1:X1, 2:X2, 3:X3, 4:TT C Optional: 5:P1, 6:P2, 7:P3, 8:AR1, 9:AI1, 10:AR2, 11:AI2 CHARACTER*80 FILE1,FILE2,FILE3,FILSRC,FILREC CHARACTER*(2+8*MQ) FORMAT CHARACTER*80 RAYTXT INTEGER NQ,KALL,NPTS,LENTXT,IQ REAL OUT(MOUT),OUTMIN(MQ),OUTMAX(MQ) C C....................................................................... C C Opening input and output files: FILREC=' ' FILSRC=' ' FILE1='r01.out' FILE2='r01i.out' FILE3='rays.out' C Number of output quantities: NQ =4 C Switch between all rays and only two-point rays: KALL=0 WRITE(*,'(2A)') * ' Enter 5 filenames (REC,SRC,R01,R01I,RAYS),', * ' and 2 integers (NQ,KALL): ' READ(*,*) FILREC,FILSRC,FILE1,FILE2,FILE3,NQ,KALL NQ=MIN0(NQ,MQ) CALL TXT1(LU3,FILSRC,FILREC) OPEN(LU1,FILE=FILE1,FORM='UNFORMATTED',STATUS='OLD') OPEN(LU2,FILE=FILE2,FORM='UNFORMATTED',STATUS='OLD') OPEN(LU3,FILE=FILE3) C C....................................................................... C C Loop for the points of rays 10 CONTINUE C Reading the results of the complete ray tracing NPTS=0 CALL CRTOUT(LU1,LU2,KALL,0,1,MQ,MPTS,NPTS,OUT,OUTMIN,OUTMAX) IF(IWAVE.LT.1)THEN C End of rays GO TO 80 END IF C Writing the results of the complete ray tracing FORMAT(1:1)='(' CALL FORM2(NQ,OUTMIN,OUTMAX,FORMAT(2:2+8*NQ)) IF(IPT.LE.1)THEN C New ray - recording the initial point CALL TXT2(KALL,0,IWAVE,IRAY,IREC,LENTXT,RAYTXT) WRITE(LU3,'(A)') '/' WRITE(LU3,'(2A)') RAYTXT(1:LENTXT),' /' WRITE(LU3,FORMAT) OUT(1),(' ',OUT(IQ),IQ=2,NQ),' /' END IF WRITE(LU3,FORMAT) OUT(1+MQ*(NPTS-1)), * (' ',OUT(IQ),IQ=2+MQ*(NPTS-1),MQ*(NPTS-1)+NQ),' /' GO TO 10 C 80 CONTINUE WRITE(LU3,'(A)') '/' WRITE(LU3,'(A)') '/' CLOSE(LU3) CLOSE(LU2) CLOSE(LU1) STOP END C C======================================================================= C INCLUDE 'error.for' C error.for INCLUDE 'sep.for' C sep.for INCLUDE 'forms.for' C forms.for INCLUDE 'length.for' C length.for INCLUDE 'ap.for' C ap.for INCLUDE 'crtout.for' C crtout.for C C======================================================================= C