X-Git-Url: http://git.dolda2000.com/gitweb/?a=blobdiff_plain;ds=sidebyside;f=src%2Fcommon.rs;h=0d829031db54810377dd23f1599b6212b6346753;hb=6566d7e5467888e41b18dbaaa52d6a8636ce8e21;hp=d2121b0a972a11573bf7302076f1f951c1ac716a;hpb=902b2b3136a49738de32a6b2fd1df78d18cf6048;p=kaka%2Frust-sdl-test.git

diff --git a/src/common.rs b/src/common.rs
index d2121b0..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,
@@ -193,6 +209,17 @@ impl<T> From<(T, T)> for Rect<T> {
     }
 }
 
+#[macro_export]
+macro_rules! hashmap {
+    ($($k:expr => $v:expr),*) => {
+	{
+	    let mut map = std::collections::HashMap::new();
+	    $(map.insert($k, $v);)*
+	    map
+	}
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;