From 697fe9d03335bdb9d5c3ccbeb6a344fd45e58aba Mon Sep 17 00:00:00 2001
From: Emily Selwood <emilywselwood@gmail.com>
Date: Tue, 24 Jan 2023 08:51:14 +0000
Subject: [PATCH] prepare for publish

---
 Cargo.toml     | 3 +++
 src/polygon.rs | 5 +++++
 2 files changed, 8 insertions(+)

diff --git a/Cargo.toml b/Cargo.toml
index d6def15..9cf89a7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,5 +1,8 @@
 [package]
 name = "polygonical"
+description = "2d polygon geometry and operations"
+keywords = ["2d", "geometry", "polygon"]
+license = "MIT"
 version = "0.1.0"
 edition = "2021"
 authors = [
diff --git a/src/polygon.rs b/src/polygon.rs
index e6450ad..93d9f42 100644
--- a/src/polygon.rs
+++ b/src/polygon.rs
@@ -79,7 +79,12 @@ impl Polygon {
     }
 
     /// Return the area of this polygon
+    /// Note: This will panic if the polygon is self intersecting.
     pub fn area(&self) -> f64 {
+        if self.is_self_intersecting() {
+            panic!("Can not calculate the area of a self intersecting polygon")
+        }
+
         let mut triangle_sum = 0.0;
         let sides = self.sides();
         for s in sides.iter().take(sides.len() - 1) {