From e93eee4bb96bd2d81e422dc9d453da6138fd6ba2 Mon Sep 17 00:00:00 2001
From: Martin Lehoux <martin@lehoux.net>
Date: Sun, 5 Apr 2020 22:46:01 -0700
Subject: misc - Doc

---
 ray.go | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'ray.go')

diff --git a/ray.go b/ray.go
index c874e31..a3f78f8 100644
--- a/ray.go
+++ b/ray.go
@@ -1,9 +1,11 @@
 package main
 
+// Ray contains a ray data
 type Ray struct {
 	origin, direction Vec3D
 }
 
+// PointAt computes ray position at a time
 func (ray Ray) PointAt(time float64) Vec3D {
 	return AddVec3D(ray.origin, ScalarProduct(time, ray.direction))
 }
-- 
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