From b9ea07f0f4ec5f8a4df01cea1057e290cd489bab Mon Sep 17 00:00:00 2001
From: lisyarus <lisyarus@gmail.com>
Date: Thu, 8 Jul 2021 14:24:03 +0300
Subject: [PATCH] Ray-simplex intersection bugfix

---
 libs/geom/include/psemek/geom/intersection.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libs/geom/include/psemek/geom/intersection.hpp b/libs/geom/include/psemek/geom/intersection.hpp
index 9af61ace..f332dddc 100644
--- a/libs/geom/include/psemek/geom/intersection.hpp
+++ b/libs/geom/include/psemek/geom/intersection.hpp
@@ -183,6 +183,8 @@ namespace psemek::geom
 
 		if (sum > T{1}) return std::nullopt;
 
+		if (b[0] < T{}) return std::nullopt;
+
 		return b[0];
 	}