From 1bb9c33699ff6d929348a18ab116b8b582513f9e Mon Sep 17 00:00:00 2001
From: Georg Hagen <git.georg.hagen@madvoxel.com>
Date: Wed, 17 Jul 2024 16:15:42 +0200
Subject: [PATCH] Fix crash when using ArBackgroundDrawable without setting an
 ar session

---
 openVulkanoCpp/Scene/Prefabs/ArBackgroundDrawable.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/openVulkanoCpp/Scene/Prefabs/ArBackgroundDrawable.cpp b/openVulkanoCpp/Scene/Prefabs/ArBackgroundDrawable.cpp
index 6268abc..7772469 100644
--- a/openVulkanoCpp/Scene/Prefabs/ArBackgroundDrawable.cpp
+++ b/openVulkanoCpp/Scene/Prefabs/ArBackgroundDrawable.cpp
@@ -46,7 +46,8 @@ namespace OpenVulkano::Scene
 
 	void ArBackgroundDrawable::Close()
 	{
-		m_arSession->OnNewFrame -= EventHandler(this, &ArBackgroundDrawable::OnNewArFrame);
+		if (m_arSession) m_arSession->OnNewFrame -= EventHandler(this, &ArBackgroundDrawable::OnNewArFrame);
+		m_arSession = nullptr;
 		m_nextFrame = nullptr;
 		Drawable::Close();
 	}
@@ -70,4 +71,4 @@ namespace OpenVulkano::Scene
 		}
 		if (!m_texture) m_texture = &Texture::PLACEHOLDER;
 	}
-}
\ No newline at end of file
+}