tInclude factor for linear exposure scaling - filmtools - various tools for photographic film development and darkroom printing
 (HTM) git clone git://src.adamsgaard.dk/filmtools
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       ---
 (DIR) commit 08c5774bdd4f60189f2f49e63b713e68758cef53
 (DIR) parent fdf4f540757312f4e76e5eddbd95f5c2cb9e2691
 (HTM) Author: Anders Damsgaard <anders@adamsgaard.dk>
       Date:   Thu, 16 Jul 2020 22:38:29 +0200
       
       Include factor for linear exposure scaling
       
       Diffstat:
         M reciprocity.c                       |       5 +++--
       
       1 file changed, 3 insertions(+), 2 deletions(-)
       ---
 (DIR) diff --git a/reciprocity.c b/reciprocity.c
       t@@ -46,7 +46,7 @@ usage()
        int
        main(int argc, char **argv)
        {
       -        double exponent;
       +        double factor, exponent;
                int i, hour, min, sec, sec_equiv;
        
                argv0 = *argv;
       t@@ -65,6 +65,7 @@ main(int argc, char **argv)
                        if (i == LENGTH(films))
                                errx(3, "unknown film type");
                        if (strncasecmp(argv[1], films[i].name, 10) == 0) {
       +                        factor = films[i].factor;
                                exponent = films[i].exponent;
                                break;
                        }
       t@@ -73,7 +74,7 @@ main(int argc, char **argv)
                if (sscanf(argv[2], "%d:%d", &min, &sec) != 2)
                        errx(2, "could not parse time in MM:SS format");
        
       -        sec_equiv = pow(min * 60 + sec, exponent);
       +        sec_equiv = factor * pow(min * 60 + sec, exponent);
            sec = (int)(sec_equiv) % 60;
                if ((min = (int)(sec_equiv / 60.0)) >= 60) {
                        hour = (int)(min/60.0);