From bc5bf8ca7b032c571a0b7ecb548d9da71e3103ec Mon Sep 17 00:00:00 2001
From: Magnus Norddahl <dpjudas@users.noreply.github.com>
Date: Tue, 10 Dec 2024 23:10:16 +0100
Subject: [PATCH] Increase the bounding box for numerical stability

---
 src/common/rendering/hwrenderer/data/hw_collision.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/common/rendering/hwrenderer/data/hw_collision.cpp b/src/common/rendering/hwrenderer/data/hw_collision.cpp
index 9f29dbabb..4a2589fdf 100644
--- a/src/common/rendering/hwrenderer/data/hw_collision.cpp
+++ b/src/common/rendering/hwrenderer/data/hw_collision.cpp
@@ -561,6 +561,14 @@ int CPUBottomLevelAccelStruct::Subdivide(int *triangles, int num_triangles, cons
 	}
 	median /= (float)num_triangles;
 
+	// For numerical stability
+	min.X -= 0.1f;
+	min.Y -= 0.1f;
+	min.Z -= 0.1f;
+	max.X += 0.1f;
+	max.Y += 0.1f;
+	max.Z += 0.1f;
+
 	if (num_triangles == 1) // Leaf node
 	{
 		nodes.push_back(Node(min, max, triangles[0] * 3));