1 files changed, 38 insertions, 0 deletions
diff --git a/src/geometry.rs b/src/geometry.rs
index e9d534a..be903d7 100644
--- a/src/geometry.rs
+++ b/src/geometry.rs
@@ -1,3 +1,5 @@
+use std::ops::*;
+
 #[derive(Debug, Clone, Copy, PartialEq)]
 pub struct Vec2d {
     pub x: f64,
@@ -8,4 +10,40 @@ impl Vec2d {
     pub fn distance(&self, other: Vec2d) -> f64 {
         ((other.x-self.x).powi(2) + (other.y-self.y).powi(2)).sqrt()
     }
+    pub fn angle(&self) -> f64 {
+        self.y.atan2(self.x)
+    }
+}
+
+impl Add for Vec2d {
+    type Output = Vec2d;
+
+    fn add(self, other: Self) -> Self {
+        Vec2d {
+            x: self.x + other.x,
+            y: self.y + other.y
+        }
+    }
+}
+
+impl Sub for Vec2d {
+    type Output = Vec2d;
+
+    fn sub(self, other: Self) -> Self {
+        Vec2d {
+            x: self.x - other.x,
+            y: self.y - other.y
+        }
+    }
+}
+
+impl Neg for Vec2d {
+    type Output = Vec2d;
+
+    fn neg(self) -> Self {
+        Vec2d {
+            x: -self.x,
+            y: -self.y
+        }
+    }
 }