C
C Program PTSWRL to convert points into the Virtual Reality Modeling
C Language or GOCAD representation
C
C Version: 5.50
C Date: 2001, May 11
C
C Coded by: Vaclav Bucha and Ludek Klimes
C     Department of Geophysics, Charles University Prague,
C     Ke Karlovu 3, 121 16 Praha 2, Czech Republic,
C     E-mails: bucha@seis.karlov.mff.cuni.cz
C              klimes@seis.karlov.mff.cuni.cz
C
C References:
C     
C     VRML (Virtual Reality Modeling Language) version 1.0C
C     
C     VRML97 (Virtual Reality Modeling Language ISO/IEC 14772)
C     
C     GOCAD
C
C.......................................................................
C                                                    
C Description of data files:
C
C Input data read from the standard input device (*):
C     The data are read by the list directed input (free format) and
C     consist of a single string 'SEP':
C     'SEP'...String in apostrophes containing the name of the input
C             SEP parameter or history file with the input data.
C     No default, 'SEP' must be specified and cannot be blank.
C
C                                                     
C Input data file 'SEP':
C     File 'SEP' has the form of the SEP
C     parameter file.  The parameters, which do not differ from their
C     defaults, need not be specified in file 'SEP'.
C Data specifying input files:
C     PTS='string'... Name of the file with the points.
C             Description of file PTS
C             Default: PTS='pts.out'
C     COLORS='string'... Name of the file containing the data describing
C             the colour map.
C             Description of file COLORS
C             Default: COLORS='hsv.dat'
C Input/output file:
C     WRL='string'... Name of the file to be supplemented with surfaces
C             or to be copied to the beginning of the output file.
C             If the filename is blank, output file starts from a
C             scratch (mostly not reasonable).
C             The default name of the output file is equal to WRL.
C             It is recommended to specify WRL rather than to use
C             the default name.
C             Default: WRL='out.wrl'
C     WRLOUT='string'... Name of the output file if different from WRL.
C             Default: WRLOUT=WRL
C Data specifying the form of the output file:
C     VRML='string'... Virtual reality scene description language.
C             VRML='VRML1': VRML (Virtual Reality Modeling Language)
C                           version 1.0.
C             VRML='VRML2': VRML97 according to ISO/IEC 14772 standard.
C             VRML='GOCAD': GOCAD description of points (VSet).
C             Default: VRML='VRML2' (recommended)
C     NAME='string'... String containing the GOCAD name of the set of
C             points.  Be sure to select different names for all objects
C             within the GOCAD file.
C             The same name is used for the corresponding colour scale,
C             written if KOLPTS is positive.
C             Used only if VRML='GOCAD'.  Obligatory parameter, must be
C             specified and cannot be blank if VRML='GOCAD'.
C Optional data to shift the points:
C     SHIFT1=real, SHIFT2=real, SHIFT3=real... All points will be shifted
C             by vector (SHIFT1,SHIFT2,SHIFT3).  The shift may be
C             applied to the points situated at a surface to make them
C             visible.
C             SHIFT1=0., SHIFT2=0., SHIFT3=0.
C Data specifying the values to be scaled in colours:
C     KOLPTS=integer... If zero, all points will have the same colour
C             given by parameters R, G, B.  If positive, the
C             values in KOLPTS-th column of input file PTS will be
C             colour coded at each point.
C             Default: KOLPTS=0
C     PROPERTIES='string'... String containing names of properties
C             corresponding to optional values V1,...,VN (see file
C             PTS) which may be used to control the
C             colour of the point.  The names are separated by blanks.
C             If the number of names is smaller than the number of
C             values, the leftmost values are considered.  PROPERTIES
C             must be specified if VRML='GOCAD' and KOLPTS is positive.
C             If KOLPTS is 1, 2 or 3, the last name is assumed to denote
C             the KOLPTSth coordinate rather than the quantity in the
C             corresponding column, and the value of the coordinate
C             copied into that column.
C             If PROPERTIES=' ', no values are considered and GOCAD atom
C             VRTX is used for the vertices (otherwise, GOCAD atom PVRTX
C             is used).
C             Used only if VRML='GOCAD'.
C             Default: PROPERTIES=' '
C Data specifying the colour scale:
C     VADD=real, VMUL=real, VPER=real, VREF=real, CREF=real, CREF1=real,
C     CREF2=real, CREF3=real, etc... Refer to file
C             colors.for.
C     R=real, G=real, B=real... Float numbers between 0 and 1 specifying
C             the colour of the points if KOLPTS=0.
C             Defaults: R=1, G=1, B=1 (white)
C
C                                                     
C Input file PTS with the points:
C (1) None to several strings terminated by / (a slash)
C (2) For each point data:
C (2.1) 'NAME',X1,X2,X3,V1,...,VN,/
C     'NAME'... Name of the point.  Not considered.  May be blank.
C     X1,X2,X3... Coordinates of the point
C     V1,...,VN...Optional values which may be used to control the
C             colour of the point.
C     /...    Values must be terminated by a slash.
C (3) / or end of file.
C
C=======================================================================
C
C Common block /RAMC/:
      INCLUDE 'ram.inc'
C     ram.inc
C
      INTEGER IRAM(MRAM)
      EQUIVALENCE (IRAM,RAM)
C
C.......................................................................
C
C     External functions and subroutines:
      EXTERNAL LENGTH,RSEP1,RSEP3T,RSEP3I,ERROR,FORM2,COLOR1,COLOR2
      INTEGER  LENGTH
C
C     Filenames and parameters:
      CHARACTER*80 FSEP,FPTS,FCOLS,FIN,FOUT
      INTEGER LU1,LU2,IUNDEF,MQ
      REAL UNDEF
      PARAMETER (LU1=1,LU2=2,IUNDEF=-999999,UNDEF=-999999.,MQ=30)
C
C     Other variables:
      CHARACTER*46  FORMAT
      CHARACTER*5   VRML
      CHARACTER*255 NAME,TEXT
      INTEGER KOLPTS,KQ,NQ
      INTEGER NVRTX,I0,I1,I2,I
      REAL SHIFT1,SHIFT2,SHIFT3,RED,GREEN,BLUE
      REAL OUTMIN(MQ),OUTMAX(MQ),R,G,B,AUX,AUXA(1)
C
C.......................................................................
C
C     Reading main input data:
      WRITE(*,'(A)') '+PTSWRL: Enter input filename: '
      FSEP=' '
      READ (*,*) FSEP
      IF(FSEP.EQ.' ') THEN
C       PTSWRL-01
        CALL ERROR('PTSWRL-01: No input file specified')
C       Input file in the form of the SEP (Stanford Exploration Project)
C       parameter or history file must be specified.
C       There is no default filename.
      END IF
      CALL RSEP1(LU1,FSEP)
      WRITE(*,'(A)') '+PTSWRL: Working...            '
C
C     Reading input and output filenames:
      CALL RSEP3T('PTS'   ,FPTS ,'pts.out')
      CALL RSEP3T('COLORS',FCOLS,'hsv.dat')
      CALL RSEP3T('WRL'   ,FIN  ,'out.wrl' )
      CALL RSEP3T('WRLOUT',FOUT ,FIN       )
      CALL RSEP3T('VRML'  ,VRML ,'VRML2'  )
      CALL LOWER(VRML)
C
C     Optional shift:
      CALL RSEP3R('SHIFT1',SHIFT1,0.00)
      CALL RSEP3R('SHIFT2',SHIFT2,0.00)
      CALL RSEP3R('SHIFT3',SHIFT3,0.00)
C
C     Reading the data for colours:
      CALL RSEP3I('KOLPTS',KOLPTS,0)
      CALL RSEP3R('R'     ,RED   ,1.00)
      CALL RSEP3R('G'     ,GREEN ,1.00)
      CALL RSEP3R('B'     ,BLUE  ,1.00)
C
C     Opening the output file and writing its beginning:
      CALL WRL1(LU1,LU2,FIN,FOUT,VRML,1)
C
C     Writing the prolog for the points (part 1):
      IF (VRML.EQ.'vrml1') THEN
        IF(KOLPTS.LE.0) THEN
          WRITE(LU2,'(A)')
     *     'DEF PointMaterial Material {'
          WRITE(LU2,'(A,3(1X,F4.2))')
     *     '  emissiveColor',RED,GREEN,BLUE
          WRITE(LU2,'(A)')
     *     '}'
     *    ,' '
        END IF
      ELSE IF (VRML.EQ.'vrml2') THEN
        WRITE(LU2,'(A)')
     *   'Shape {'
     *  ,'  appearance DEF PointAppearance Appearance {'
     *  ,'    material Material {'
        IF(KOLPTS.LE.0) THEN
          WRITE(LU2,'(A,3(1X,F4.2))')
     *     '      emissiveColor',RED,GREEN,BLUE
        END IF
        WRITE(LU2,'(A)')
     *   '    }'
     *  ,'  }'
     *  ,'}'
     *  ,' '
      ELSE IF (VRML.EQ.'gocad') THEN
        CALL RSEP3T('NAME',NAME,' ')
C       Subroutine WRL has already checked that NAME is not blank.
        WRITE(LU2,'(A)')
     *   'GOCAD VSet'
        WRITE(LU2,'(2A)')
     *   'HDR name:',NAME(1:LENGTH(NAME))
        WRITE(LU2,'(A)')
     *   'HDR *visible:true'
     *  ,'HDR *atoms*symbol:point'
     *  ,'HDR *atoms*size:3'
        CALL RSEP3T('PROPERTIES',TEXT,' ')
        I0=1
        KQ=3
        DO 11 I=1,LEN(TEXT)-1
          IF (TEXT(I:I).EQ.' '.AND.TEXT(I+1:I+1).NE.' ') THEN
            I0=I+1
          END IF
          IF (TEXT(I:I).NE.' '.AND.TEXT(I+1:I+1).EQ.' ') THEN
            KQ=KQ+1
            IF (KQ.EQ.KOLPTS) THEN
              I1=I0
              I2=I
            END IF
          END IF
   11   CONTINUE
        IF (KOLPTS.LE.0) THEN
          WRITE(LU2,'(3(A,F4.2))')
     *     'HDR *atoms*color: ',RED,' ',GREEN,' ',BLUE
        ELSE
          IF (KQ.LT.KOLPTS.OR.KQ.LT.4) THEN
C           PTSWRL-02
            CALL ERROR('PTSWRL-02: GOCAD property name not specified')
C           If KOLPTS is not zero, list PROPERTIES of property names
C           must contain MAX(1,KOLPTS-3) names at the least, see the
C           description of the input data.
          END IF
          WRITE(LU2,'(A)')
     *     'HDR *painted:true'
          WRITE(LU2,'(2A)')
     *     'HDR *painted*variable:',TEXT(I1:I2)
        END IF
        IF (KQ.GT.3) THEN
          WRITE(LU2,'(2A)')
     *     'PROPERTIES ',TEXT(1:LENGTH(TEXT))
        END IF
        IF (KOLPTS.NE.0) THEN
          WRITE(LU2,'(2A)')
     *     'PROPERTY_CLASSES ',TEXT(1:LENGTH(TEXT))
          WRITE(LU2,'(3A)')
     *     'PROPERTY_CLASS_HEADER ',TEXT(I1:I2),' {'
C         The output file now waits for the colour scale.
        END IF
C       KQ is the number of coordinates and properties at each point.
C     ELSE IF (VRML.EQ.'pov') THEN
C       ***
      ELSE
C       PTSWRL-03
        CALL ERROR('PTSWRL-03: No valid string in VRML')
C       Valid string specifying the form of the output file is:
C       VRML='VRML1' or 'VRML2' or 'GOCAD'.  Default and recommended
C       value is 'VRML2'.
      END IF
C
C     Determining number NQ of values stored at each point:
      IF(VRML.EQ.'gocad') THEN
        NQ=KQ
      ELSE
        KQ=MAX0(3,KOLPTS)
        IF(KOLPTS.EQ.0) THEN
          NQ=3
        ELSE
          NQ=4
        END IF
C       Values to be displayed will be shifted to the 4th column
      END IF
      IF(NQ.GT.MQ) THEN
C       PTSWRL-04
        CALL ERROR('PTSWRL-04: Too small arrays OUTMIN and OUTMAX')
      END IF
C
C     Reading points:
      OPEN(LU1,FILE=FPTS,STATUS='OLD')
      READ(LU1,*) (TEXT,I=1,20)
      NVRTX=0
   20 CONTINUE
        IF(NVRTX+KQ.GT.MRAM) THEN
C         PTSWRL-05
          CALL ERROR('PTSWRL-05: Too small array RAM')
        END IF
        TEXT='$'
        DO 21 I=NVRTX+1,NVRTX+KQ
          RAM(I)=0.
   21   CONTINUE
        READ(LU1,*,END=29) TEXT,(RAM(I),I=NVRTX+1,NVRTX+KQ)
        IF(TEXT.EQ.'$') THEN
          GO TO 29
        END IF
C       Relocating the values to be displayed
        IF(VRML.EQ.'gocad') THEN
          IF(1.LE.KOLPTS.AND.KOLPTS.LE.3) THEN
            RAM(NVRTX+KQ)=RAM(NVRTX+KOLPTS)
          END IF
        ELSE
          IF(KOLPTS.GT.0) THEN
            RAM(NVRTX+4)=RAM(NVRTX+KOLPTS)
          END IF
        END IF
C       Shifting the point
        RAM(NVRTX+1)=RAM(NVRTX+1)+SHIFT1
        RAM(NVRTX+2)=RAM(NVRTX+2)+SHIFT2
        RAM(NVRTX+3)=RAM(NVRTX+3)+SHIFT3
C       Determining the minimum and maximum values
        IF(NVRTX.EQ.0) THEN
          DO 22 I=1,NQ
            OUTMIN(I)=RAM(NVRTX+I)
            OUTMAX(I)=RAM(NVRTX+I)
   22     CONTINUE
        ELSE
          DO 23 I=1,NQ
            OUTMIN(I)=AMIN1(OUTMIN(I),RAM(NVRTX+I))
            OUTMAX(I)=AMAX1(OUTMAX(I),RAM(NVRTX+I))
   23     CONTINUE
        END IF
C       Number of storage locations in RAM used for the points
        NVRTX=NVRTX+NQ
      GO TO 20
   29 CONTINUE
      CLOSE(LU1)
C     NVRTX is the number of storage locations in RAM used for points
C
C     Determining the colour map:
      IF(KOLPTS.GT.0) THEN
        IF(VRML.EQ.'gocad') THEN
          CALL COLOR1(LU1,MRAM-NVRTX,IRAM(NVRTX+1),RAM(NVRTX+1),
     *                                  1,OUTMIN(KOLPTS),OUTMAX(KOLPTS))
          WRITE(LU2,'(2A)')
     *     ' *colormap:',NAME(1:LENGTH(NAME))
          FORMAT='(A,'
          CALL FORM2(1,OUTMIN(KOLPTS),OUTMAX(KOLPTS),FORMAT(4:11))
          FORMAT(9:11)=')  '
          IF(OUTMAX(KOLPTS).GT.OUTMIN(KOLPTS)) THEN
            WRITE(LU2,FORMAT)
     *       ' *low_clip: ',OUTMIN(KOLPTS)
     *      ,' *high_clip:',OUTMAX(KOLPTS)
          ELSE
            WRITE(LU2,FORMAT)
     *       ' *low_clip: ',OUTMIN(KOLPTS)
     *      ,' *high_clip:',OUTMIN(KOLPTS)+1.
          END IF
          WRITE(LU2,'(4A)')
     *     ' *colormap*',NAME(1:LENGTH(NAME)),'*colors: ',CHAR(92)
          AUX=(OUTMAX(KOLPTS)-OUTMIN(KOLPTS))/255.
          DO 31 I=0,255
            AUXA(1)=OUTMIN(KOLPTS)+FLOAT(I)*AUX
            CALL COLOR2(MRAM-NVRTX,IRAM(NVRTX+1),RAM(NVRTX+1),
     *                                                     1,AUXA,R,G,B)
            IF (I.LT.255) THEN
              WRITE(LU2,'(I5,3(1X,F4.2),2A)')
     *         I,R,G,B,' ',CHAR(92)
            ELSE
              WRITE(LU2,'(I5,3(1X,F4.2),2A)')
     *         I,R,G,B
            END IF
   31     CONTINUE
C       ELSE IF (VRML.EQ.'pov') THEN
C         ***
        ELSE
          CALL COLOR1(LU1,MRAM-NVRTX,IRAM(NVRTX+1),RAM(NVRTX+1),
     *                                            1,OUTMIN(4),OUTMAX(4))
        END IF
      END IF
C
C     Writing the prolog for the points (part 2):
      IF (VRML.EQ.'vrml1') THEN
        WRITE(LU2,'(A)')
     *   'Separator {'
        IF(KOLPTS.GT.0) THEN
          WRITE(LU2,'(A)')
     *     'MaterialBinding { value PER_VERTEX }'
        ELSE
          WRITE(LU2,'(A)')
     *     'MaterialBinding { value OVERALL }'
     *    ,'USE PointMaterial'
        END IF
        WRITE(LU2,'(A)')
     *   'Coordinate3 { point ['
      ELSE IF (VRML.EQ.'vrml2') THEN
        WRITE(LU2,'(A)')
     *   'Point {'
     *  ,'appearance USE PointAppearance'
     *  ,'point ['
      ELSE IF (VRML.EQ.'gocad') THEN
        WRITE(LU2,'(A)')
     *   '}'
      END IF
C
C     Writing the points:
      IF (VRML.EQ.'vrml1'.OR.VRML.EQ.'vrml2') THEN
        FORMAT='('
        CALL FORM2(3,OUTMIN(1),OUTMAX(1),FORMAT(2:25))
        DO 81 I=1,NVRTX,NQ
          WRITE(LU2,FORMAT) RAM(I),' ',RAM(I+1),' ',RAM(I+2),','
   81   CONTINUE
      ELSE IF (VRML.EQ.'gocad') THEN
        FORMAT='(A,I0,A,'
        FORMAT(5:5)=CHAR(ICHAR('1')+INT(ALOG10(FLOAT(NVRTX/NQ)+0.5)))
        CALL FORM2(NQ,OUTMIN(1),OUTMAX(1),FORMAT(9:8+8*NQ))
        IF (KOLPTS.EQ.0) THEN
          DO 82 I0=1,NVRTX,NQ
            WRITE(LU2,FORMAT) 'VRTX ',I0/NQ+1,(' ',RAM(I),I=I0,I0+NQ-1)
   82     CONTINUE
        ELSE
          DO 83 I0=1,NVRTX,NQ
            WRITE(LU2,FORMAT) 'PVRTX ',I0/NQ+1,(' ',RAM(I),I=I0,I0+NQ-1)
   83     CONTINUE
        END IF
      ELSE IF (VRML.EQ.'pov') THEN
C       Writing the vertices with values:
C       ***
      END IF
C     Writing the trailor for the point:
      IF (VRML.EQ.'vrml1') THEN
        WRITE(LU2,'(A)') '] }'
      ELSE IF (VRML.EQ.'vrml2') THEN
        WRITE(LU2,'(A)') ']'
      END IF
C
C     Writing the colours of the points:
      IF(KOLPTS.GT.0) THEN
        IF (VRML.EQ.'vrml1') THEN
          WRITE(LU2,'(A)') 'Material { emissiveColor ['
        ELSE IF (VRML.EQ.'vrml2') THEN
          WRITE(LU2,'(A)') 'color Color { color ['
        END IF
        IF (VRML.EQ.'vrml1'.OR.VRML.EQ.'vrml2') THEN
          DO 84 I=NQ,NVRTX,NQ
            CALL COLOR2(MRAM-NVRTX,IRAM(NVRTX+1),RAM(NVRTX+1),
     *                                                 1,RAM(I),R,G,B)
            WRITE(LU2,'(3(F4.2,A))') R,' ',G,' ',B,','
   84     CONTINUE
        END IF
        IF (VRML.EQ.'vrml1') THEN
          WRITE(LU2,'(A)') '] }'
        ELSE IF (VRML.EQ.'vrml2') THEN
          WRITE(LU2,'(A)') '] }'
        END IF
      END IF
C
C     Writing the trailor for the point set:
      IF (VRML.EQ.'vrml1') THEN
        WRITE(LU2,'(A)') 'PointSet { }'
        WRITE(LU2,'(A)') '}'
      ELSE IF (VRML.EQ.'vrml2') THEN
        WRITE(LU2,'(A)') '}'
      ELSE IF (VRML.EQ.'gocad') THEN
        WRITE(LU2,'(A)') 'END'
      END IF
      CLOSE(LU2)
      WRITE(*,'(A)') '+PTSWRL: Done.                 '
      STOP
      END
C
C=======================================================================
C
      INCLUDE 'error.for'
C     error.for
      INCLUDE 'sep.for'
C     sep.for
      INCLUDE 'length.for'
C     length.for
      INCLUDE 'forms.for'
C     forms.for
      INCLUDE 'colors.for'
C     colors.for
      INCLUDE 'wrl.for'
C     wrl.for
C
C=======================================================================
C