added minimum turn option, to discretize turns in VR

[laserbrain_demo] / src / opt.cc

diff --git a/src/opt.cc b/src/opt.cc
index 7f3d4bb..15c61cc 100644 (file)
--- a/src/opt.cc
+++ b/src/opt.cc
@@ -13,7 +13,8 @@ Options def_opt = {
        0,              // scene file
        true,   // music
        true,   // reflections
-       0               // data url
+       0,              // data url
+       0.0f    // minimum turn angle
 };
 
 enum {
@@ -25,6 +26,7 @@ enum {
        OPT_MUSIC,
        OPT_REFLECT,
        OPT_DATAURL,
+       OPT_MIN_TURN,
        OPT_HELP
 };
 
@@ -38,6 +40,7 @@ static optcfg_option options[] = {
        {'m', "music", OPT_MUSIC, "play background audio"},
        {'r', "reflect", OPT_REFLECT, "render reflections"},
        {0, "url", OPT_DATAURL, "data URL"},
+       {0, "minturn", OPT_MIN_TURN, "minimum turn angle"},
        {'h', "help", OPT_HELP, "print usage and exit"},
        OPTCFG_OPTIONS_END
 };
@@ -116,6 +119,19 @@ static int opt_handler(optcfg *oc, int optid, void *cls)
                opt.data_url = strdup(optcfg_next_value(oc));
                break;
 
+       case OPT_MIN_TURN:
+               {
+                       int deg;
+                       char *valstr = optcfg_next_value(oc);
+
+                       if(!valstr || sscanf(valstr, "%d", &deg) != 1) {
+                               fprintf(stderr, "minimum turn must be a number >= 0 in degrees\n");
+                               return -1;
+                       }
+                       opt.min_turn = deg;
+               }
+               break;
+
        case OPT_HELP:
                printf("Usage: demo [options]\nOptions:\n");
                optcfg_print_options(oc);