1 files changed, 13 insertions, 0 deletions
diff --git a/src/rtw/ray.zig b/src/rtw/ray.zig
new file mode 100644
index 0000000..e46198f
--- /dev/null
+++ b/src/rtw/ray.zig
@@ -0,0 +1,13 @@
+const vec = @import("vec.zig");
+const Vec3 = vec.Vec3;
+const Point3 = vec.Point3;
+
+pub const Ray = struct {
+    origin: Vec3,
+    dir: Vec3,
+    time: f64,
+
+    pub fn at(r: Ray, t: f64) Point3 {
+        return r.origin.add(r.dir.mul(t));
+    }
+};