From 9991af973bd4cde3de1982dc390641fb357d6e57 Mon Sep 17 00:00:00 2001
From: John Honniball <coredump@virginmedia.com>
Date: Sun, 20 Sep 2020 12:18:27 +0100
Subject: [PATCH] Add a few function-level comments.

---
 reuleaux.c     | 2 ++
 star_grid.c    | 2 ++
 superellipse.c | 2 ++
 ternary_arcs.c | 2 ++
 4 files changed, 8 insertions(+)

diff --git a/reuleaux.c b/reuleaux.c
index 121567a..79908f4 100644
--- a/reuleaux.c
+++ b/reuleaux.c
@@ -111,6 +111,8 @@ void plot_lr(const double x0, const double y0, const double width, const double
 }
 
 
+/* reuleaux --- draw a Reuleaux polygon centred on (xc, yc) */
+
 void reuleaux(const double xc, const double yc, const double r, const int n, const bool drawSides)
 {
    /* https://en.wikipedia.org/wiki/Reuleaux_triangle */
diff --git a/star_grid.c b/star_grid.c
index 53764eb..fadcdba 100644
--- a/star_grid.c
+++ b/star_grid.c
@@ -101,6 +101,8 @@ int main(int argc, char * const argv[])
 }
 
 
+/* draw_star --- draw a single star at (x0, y0) */
+
 void draw_star(const double x0, const double y0, const double gridsz, const double xc, const double yc, const int n)
 {
    int i;
diff --git a/superellipse.c b/superellipse.c
index e60a795..4e0f9c4 100644
--- a/superellipse.c
+++ b/superellipse.c
@@ -180,6 +180,8 @@ void plot_ur(const double xc, const double yc, const double r1, const double r2)
 }
 
 
+/* superellipse --- draw a superellipse at (x0, y0) */
+
 void superellipse(const double x0, const double y0, const double a, const double b, const double theta, const double d)
 {
    const int npts = 72;
diff --git a/ternary_arcs.c b/ternary_arcs.c
index b31a97c..c9b1270 100644
--- a/ternary_arcs.c
+++ b/ternary_arcs.c
@@ -87,6 +87,8 @@ int main(int argc, char * const argv[])
 }
 
 
+/* draw_arcs --- draw arcs or lines at (x, y) */
+
 void draw_arcs(const double x, const double y, const double r, const char str[])
 {
    moveto(x, y + r);