From b2b03fa42a4326d45c84955e0c3a9e45b887c942 Mon Sep 17 00:00:00 2001
From: Sanjay Salem <38601117+sanjaysalem17@users.noreply.github.com>
Date: Sat, 30 Oct 2021 17:00:05 -0500
Subject: [PATCH] update camera rays.md

---
 docs/pathtracer/camera_rays.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/docs/pathtracer/camera_rays.md b/docs/pathtracer/camera_rays.md
index 08a3c41..c170f07 100644
--- a/docs/pathtracer/camera_rays.md
+++ b/docs/pathtracer/camera_rays.md
@@ -26,7 +26,7 @@ Implement `Camera::generate_ray`. This function should return a ray **in world s
 
 <center><img src="images/camera_coordinate_system.png" ></center>
 
-Note that the camera maintains camera-space-to-world space transform matrix `iview` that you will need to use in order to get the new ray back into **world space**.
+Note that the camera maintains camera-space-to-world space transform matrix `iview` that you will need to use in order to get the new ray back into **world space**. Note that since `iview` is a transform matrix, it contains translation, rotation, and scale factors. Be careful in how you use it on specific objects, and take a look at `lib/mat4.h` to see what functions are available for the `Mat4` object.
 
 Once you have implemented `Pathtracer::trace_pixel`, `Rect::sample` and `Camera::generate_ray`ou should now have a camera that can shoot rays into the scene! See the
 **Raytracing Visualization** below to confirm this.
-- 
GitLab