From b8861b7f8dad659b3c6438a4dfb719754733fa2a Mon Sep 17 00:00:00 2001
From: Bill Thiede <git@xinu.tv>
Date: Sat, 8 Sep 2018 19:58:24 -0700
Subject: [PATCH] Add simple ray module.

---
 rtiow/src/lib.rs |  1 +
 rtiow/src/ray.rs | 22 ++++++++++++++++++++++
 2 files changed, 23 insertions(+)
 create mode 100644 rtiow/src/ray.rs

diff --git a/rtiow/src/lib.rs b/rtiow/src/lib.rs
index 9b789be..1d07923 100644
--- a/rtiow/src/lib.rs
+++ b/rtiow/src/lib.rs
@@ -1 +1,2 @@
+pub mod ray;
 pub mod vec3;
diff --git a/rtiow/src/ray.rs b/rtiow/src/ray.rs
new file mode 100644
index 0000000..a9a67c0
--- /dev/null
+++ b/rtiow/src/ray.rs
@@ -0,0 +1,22 @@
+use vec3::Vec3;
+
+#[derive(Default)]
+pub struct Ray {
+    a: Vec3,
+    b: Vec3,
+}
+
+impl Ray {
+    pub fn new(a: Vec3, b: Vec3) -> Ray {
+        Ray { a, b }
+    }
+    pub fn origin(self) -> Vec3 {
+        self.a
+    }
+    pub fn direction(self) -> Vec3 {
+        self.b
+    }
+    pub fn point_at_parameter(self, t: f32) -> Vec3 {
+        self.a + self.b * t
+    }
+}