From 1829061e1f9fbfbdd0cf7ff954545a2ae8c9443f Mon Sep 17 00:00:00 2001
From: Simon Stucki <simon_stucki@hotmail.com>
Date: Fri, 16 Aug 2024 14:54:00 +0200
Subject: [PATCH] Add bvh split axis heuristic measurements

---
 report/parts/results.tex | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/report/parts/results.tex b/report/parts/results.tex
index 5100897..21ea922 100644
--- a/report/parts/results.tex
+++ b/report/parts/results.tex
@@ -234,6 +234,25 @@ \subsection*{Russian Roulette}
     \label{tab:russian-roulette-measurements}
 \end{table}
 
+\subsection*{BVH Split Axis Heuristic}
+
+For the intersection tests using the \gls{BVH}, the split axis is used as a heuristic for node traversal as described in \autoref{sec:bvh-implementation}. In order to assess the effectiveness of the heuristic, the benchmark results for the path tracing routine are shown in \autoref{tab:bvh-split-axis-measurements}.
+
+\begin{table}[H]
+    \centering
+    \ra{1.3}
+    \begin{tabular}{@{}lll@{}}
+    \toprule
+    & With split axis heuristic & Without split axis heuristic \\
+    High & 3,244.30 ms $\pm$ 45.71 ms & 4,039.87 ms $\pm$ 33.51 ms \\
+    Mid & 2,663.14 ms $\pm$ 35.57 ms & 3,181.89 ms $\pm$ 24.92 ms \\
+    Low & 2,698.65 ms $\pm$ 27.60 ms & 3,124.27 ms $\pm$ 36.02 ms \\
+    \bottomrule
+    \end{tabular}
+    \caption{Benchmark results for BVH split axis heuristic.}
+    \label{tab:bvh-split-axis-measurements}
+\end{table}
+
 \subsection*{Overall Performance}
 
 The results for \gls{CPU} performance were recorded using the Performance API and are presented in Table~\ref{tab:cpuPerformance}. The results for \gls{GPU} performance were recorded using \gls{WebGPU} timestamp queries and are presented in Table~\ref{tab:gpuPerformance}.