From e8fa4a58670e74aa0744e289490562b47a7589a8 Mon Sep 17 00:00:00 2001
From: LafuenteAstronomy <56778509+LafuenteAstronomy@users.noreply.github.com>
Date: Thu, 9 Apr 2020 06:33:49 +0800
Subject: [PATCH] Update shadermanager.cpp

One of the new Celestia updates that I will add to Gurren's Cel+ project to make it as updated in the development sector as possible
---
 src/celengine/shadermanager.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/celengine/shadermanager.cpp b/src/celengine/shadermanager.cpp
index 75fa64004b..61c44f2945 100644
--- a/src/celengine/shadermanager.cpp
+++ b/src/celengine/shadermanager.cpp
@@ -254,6 +254,11 @@ ShaderProperties::usesTangentSpaceLighting() const
 
 bool operator<(const ShaderProperties& p0, const ShaderProperties& p1)
 {
+    if (p0.simpleProps < p1.simpleProps)
+        return true;
+    if (p1.simpleProps < p0.simpleProps)
+        return false;
+  
     if (p0.texUsage < p1.texUsage)
         return true;
     if (p1.texUsage < p0.texUsage)