From e0ae2984ae8875e761e55189861bc28789d77121 Mon Sep 17 00:00:00 2001
From: Jean-Baptiste Perrier <jeanbapt.perrier@gmail.com>
Date: Thu, 18 Mar 2021 18:59:32 +0100
Subject: [PATCH] UICanvas frustum culling.

---
 Source/Engine/UI/UICanvas.cs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Source/Engine/UI/UICanvas.cs b/Source/Engine/UI/UICanvas.cs
index 6dfe6958d..5e9d340d2 100644
--- a/Source/Engine/UI/UICanvas.cs
+++ b/Source/Engine/UI/UICanvas.cs
@@ -57,7 +57,8 @@ namespace FlaxEngine
         /// <inheritdoc />
         public override void Render(GPUContext context, ref RenderContext renderContext, GPUTexture input, GPUTexture output)
         {
-            // TODO: apply frustum culling to skip rendering if canvas is not in a viewport
+            if (renderContext.View.Frustum.Contains(Canvas.Bounds.GetBoundingBox()) == ContainmentType.Disjoint)
+                return;
 
             Profiler.BeginEventGPU("UI Canvas");