new option --bounciness (default changed from 100% to 50%).

[vor.git] / args.c

diff --git a/args.c b/args.c
new file mode 100644 (file)
index 0000000..5ee9c35
--- /dev/null
+++ b/args.c
@@ -0,0 +1,68 @@
+#include "args.h"
+#include "config.h"
+
+int opt_fullscreen;
+int opt_music;
+int opt_sound;
+float opt_bounciness;
+float opt_gamespeed;
+int opt_tail_engine;
+int opt_friction;
+
+error_t parse_opt(int, char*, struct argp_state *);
+
+const char *argp_program_version = "Variations on Rockdodger " VERSION;
+const char *argp_program_bug_address = "<josh@qualdan.com>";
+static char doc[] = "Dodge the rocks until you die.";
+static struct argp_option opts[] = {
+       {0, 0, 0, 0, "Gameplay Variations:"},
+       {"bounciness", 'b', "N%", 0, "keep N% of speed when hitting edges (default 50%)"},
+       {"game-speed", 'g', "N%", 0, "50-100% (default 100%)"},
+       {"bad-physics", 'p', 0, 0, "bad physics (i.e. friction)"},
+       {0, 0, 0, 0, "Look and Feel:"},
+       {"engine", 'e', 0, 0, "Display large tail plume"},
+       {"full-screen", 'f', 0, 0, ""},
+       {"music", 'm', 0, 0, "Enable music"},
+       {"silent", 's', 0, 0, "Turn off explosion sounds"},
+       {0, 0, 0, 0, "Informational:", -1},
+       {0}
+};
+
+struct argp argp = { opts, &parse_opt, 0, doc };
+
+void
+init_opts(void)
+{
+       opt_fullscreen = 0;
+       opt_sound = 1;
+       opt_music = 0;
+       opt_bounciness = 0.50; // lose 50% when you hit the screen edge.
+       opt_gamespeed = 1.00; // Run game at full speed.
+       // These switch back to the old gameplay and are off by default.
+       opt_tail_engine = 0;
+       opt_friction = 0;
+}
+
+error_t
+parse_opt(int key, char *arg, struct argp_state *state)
+{
+       int i;
+
+       switch(key) {
+               case 'f': opt_fullscreen = 1; break;
+               case 'm': opt_music = 1; break;
+               case 's': opt_sound = 0; opt_music = 0; break;
+               case 'b': i = 0; sscanf(arg, "%d%%", &i);
+                                 if(i < 50) i = 50; else if(i > 100) i = 100;
+                                 opt_bounciness = (float)i / 100;
+                                 break;
+               case 'g': i = 0; sscanf(arg, "%d%%", &i);
+                                 if(i < 0) i = 0; else if(i > 100) i = 100;
+                                 opt_gamespeed = (float)i / 100;
+                                 break;
+               case 'e': opt_tail_engine = 1; break;
+               case 'p': opt_friction = 1; break;
+               default: break;
+       }
+       return 0;
+}