Add existing files

src/types.rs

@@ -0,0 +1,50 @@
+extern crate nalgebra as na;
+use na::*;
+use na::geometry::Point3;
+
+#[derive(Clone, Copy, Debug)]
+pub struct Ray {
+    pub origin: Point3<f32>,
+    pub direction: Unit<Vector3<f32>>
+}
+
+impl Ray {
+    pub fn from_parts(origin: Point3<f32>, direction: Unit<Vector3<f32>>) -> Self {
+        Ray {
+            origin: origin,
+            direction: direction
+        }
+    }
+    pub fn new(origin: Point3<f32>, direction: Vector3<f32>) -> Self { Ray::from_parts(origin, Unit::new_normalize(direction)) }
+    pub fn from_points(a: Point3<f32>, b: Point3<f32>) -> Self { Ray::new(a, b - a) }
+
+    pub fn project(&self, t: f32) -> Point3<f32> { self.origin + t * self.direction.into_inner() }
+}
+
+#[derive(Clone, Copy, Debug)]
+pub struct Color {
+    pub red: f32,
+    pub green: f32,
+    pub blue: f32,
+
+    _private: () // Private field prevents direct construction
+}
+
+impl Color {
+    pub fn new(red: f32, green: f32, blue: f32) -> Self {
+        Color {
+            red:   clamp(red,   0.0, 1.0),
+            green: clamp(green, 0.0, 1.0),
+            blue:  clamp(blue,  0.0, 1.0),
+
+            _private: ()
+        }
+    }
+
+    pub fn to_byte_array(&self) -> [u8; 3] {
+        let red   = (255.0 * self.red)   as u8;
+        let green = (255.0 * self.green) as u8;
+        let blue  = (255.0 * self.blue)  as u8;
+        [red, green, blue]
+    }
+}