X-Git-Url: http://git.dolda2000.com/gitweb/?a=blobdiff_plain;f=src%2Fcommon.rs;h=0d829031db54810377dd23f1599b6212b6346753;hb=eca2559123ae3c7ef184bf42ec60680fcddb38f6;hp=01c0238ee278c39f0c44d0e80925579d279fd63d;hpb=05ba09764d251b4dbf3d6572e1fe54bcbc154dda;p=kaka%2Frust-sdl-test.git

diff --git a/src/common.rs b/src/common.rs
index 01c0238..0d82903 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -14,10 +14,26 @@ pub struct Point2D<T> {
 }
 
 impl Point2D<f64> {
-    pub fn length(self) -> f64 {
+    pub fn length(&self) -> f64 {
         ((self.x * self.x) + (self.y * self.y)).sqrt()
     }
 
+    pub fn normalize(&self) -> Self {
+	let l = self.length();
+	Self {
+	    x: self.x / l,
+	    y: self.y / l,
+	}
+    }
+
+    pub fn radians(&self) -> Radians {
+	Radians(self.y.atan2(self.x))
+    }
+
+    pub fn degrees(&self) -> Degrees {
+	self.radians().to_degrees()
+    }
+
     pub fn to_i32(self) -> Point2D<i32> {
 	Point2D {
 	    x: self.x as i32,