From 2947bcefdfc971f9729003a51cfe4d65f33b19db Mon Sep 17 00:00:00 2001
From: Paul Duncan <pabs@pablotron.org>
Date: Tue, 5 Feb 2019 01:26:15 -0500
Subject: add comments, remove cruft

---
 src/main.c | 33 +++++++++++----------------------
 1 file changed, 11 insertions(+), 22 deletions(-)

diff --git a/src/main.c b/src/main.c
index 20ce9af..8bae71c 100644
--- a/src/main.c
+++ b/src/main.c
@@ -12,14 +12,21 @@
 #include "util.h"
 #include "km.h"
 
+// maximum number of clusters to test
 #define MAX_CLUSTERS 10
+
+// number of tests to run on each cluster size
 #define NUM_TESTS 100
 #define MAX_BEST 10
 
+// output image size
 #define IM_WIDTH 128
 #define IM_HEIGHT 128
 #define IM_STRIDE (3 * IM_WIDTH)
 
+// static output image data buffer
+static uint8_t im_data[3 * IM_WIDTH * IM_HEIGHT];
+
 typedef struct {
   float score;
   km_set_t set;
@@ -75,22 +82,6 @@ ctx_best_sort(
   );
 }
 
-/*
- * static void
- * ctx_best_walk(
- *   const ctx_t * const ctx,
- *   void (*on_best)(const km_set_t * const, const size_t, const float, void *),
- *   void * const cb_data
- * ) {
- *   if (on_best) {
- *     // walk best sets and emit each one
- *     for (size_t i = 0; i < ctx_get_max_best(ctx); i++) {
- *       on_best(&(ctx->best[i].set), i, ctx->best[i].score, cb_data);
- *     }
- *   }
- * }
- */
-
 static bool
 load_on_shape(
   const km_shape_t * const shape,
@@ -222,9 +213,6 @@ FIND_CBS = {
   .on_best      = find_on_best,
 };
 
-// static image data buffer
-static uint8_t im_data[3 * IM_WIDTH * IM_HEIGHT];
-
 static void
 ctx_save_png(
   const ctx_t * const ctx,
@@ -266,7 +254,7 @@ static const char USAGE_FORMAT[] =
   "Arguments:\n"
   "* init:      Cluster init method (one of \"rand\" or \"set\").\n"
   "* data_path: Path to input data file.\n"
-  "* png_path:  Path to output file (optional).\n"
+  "* png_path:  Path to output PNG (optional).\n"
   "";
 
 int main(int argc, char *argv[]) {
@@ -281,8 +269,9 @@ int main(int argc, char *argv[]) {
   const char * const data_path = argv[2];
   const char * const png_path = (argc > 3) ? argv[3] : NULL;
 
-  // init random seed
+  // init rng
   srand(getpid());
+  const int rand_seed = rand();
 
   // init context
   ctx_t ctx;
@@ -290,7 +279,7 @@ int main(int argc, char *argv[]) {
   ctx.init_type = km_init_get_type(init_type_name);
 
   // init ctx rng
-  km_rand_init_erand48(&(ctx.rs), rand());
+  km_rand_init_erand48(&(ctx.rs), rand_seed);
 
   // init data set
   km_set_t set;
-- 
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