From eef29c2b2f7739434433eece6a04c8f5ee0cb7ae Mon Sep 17 00:00:00 2001
From: Nathan Vegdahl <cessen@cessen.com>
Date: Sun, 23 Jun 2019 19:26:30 +0900
Subject: [PATCH] Type alias for the ray index type.

Makes things easier to play with.
---
 src/accel/bvh4.rs | 2 +-
 src/ray.rs        | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/accel/bvh4.rs b/src/accel/bvh4.rs
index c739d38..86b2389 100644
--- a/src/accel/bvh4.rs
+++ b/src/accel/bvh4.rs
@@ -206,7 +206,7 @@ impl<'a> BVH4<'a> {
                             ([0, 1, 2, 3, 4, 5, 6, 7], 0)
                         }
                     });
-                    
+
                     trav_time += timer.tick() as f64;
 
                     if hit_count > 0 {
diff --git a/src/ray.rs b/src/ray.rs
index 1881dba..585b0cc 100644
--- a/src/ray.rs
+++ b/src/ray.rs
@@ -4,6 +4,7 @@ use float4::Float4;
 
 use crate::math::{Matrix4x4, Point, Vector};
 
+type RayIndexType = u16;
 type FlagType = u8;
 const OCCLUSION_FLAG: FlagType = 1;
 const DONE_FLAG: FlagType = 1 << 1;
@@ -229,7 +230,7 @@ impl RayStack {
     /// Pushes the given ray index onto the end of the specified lane.
     pub fn push_ray_index(&mut self, ray_idx: usize, lane: usize) {
         assert!(self.lanes.len() > lane);
-        self.lanes[lane].idxs.push(ray_idx as u16);
+        self.lanes[lane].idxs.push(ray_idx as RayIndexType);
     }
 
     /// Takes the given list of lane indices, and pushes any excess indices on
@@ -282,7 +283,7 @@ impl RayStack {
 /// A lane within a RayStack.
 #[derive(Debug)]
 struct Lane {
-    idxs: Vec<u16>,
+    idxs: Vec<RayIndexType>,
     end_len: usize,
 }