updates docs (#4)

Co-authored-by: TANG ZHIXIONG <[email protected]>
cubao · Nov 4, 2022 · 8bb8a13 · 8bb8a13
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diff --git a/README.md b/README.md
@@ -2,6 +2,8 @@
 
 A very fast 2D concave hull algorithm.
 
+![](hull.png)
+
 Credits goes to:
 
 -   https://github.com/mapbox/concaveman

diff --git a/hull.png b/hull.png
diff --git a/test.py b/test.py
@@ -21,7 +21,7 @@
 
 plt.plot(points[:, 0], points[:, 1], "o")
 for simplex in convex_hull.simplices:
-    plt.plot(points[simplex, 0], points[simplex, 1], "k-")
+    plt.plot(points[simplex, 0], points[simplex, 1], "g-", alpha=0.5)
 
 idxes = concave_hull_indexes(
     points[:, :2],
@@ -31,5 +31,5 @@
 
 for f, t in zip(idxes[:-1], idxes[1:]):
     seg = points[[f, t]]
-    plt.plot(seg[:, 0], seg[:, 1], "k-")
+    plt.plot(seg[:, 0], seg[:, 1], "r-", alpha=0.5)
 plt.show()