From 7e292fbfece37edc25d8898672a3cc6c09d6359d Mon Sep 17 00:00:00 2001
From: Rachael Alexanderson <eruanna@drdteam.org>
Date: Mon, 19 Jun 2017 15:01:27 -0400
Subject: [PATCH] - Partially fixed the 3d floors + fogboundary issue. There's
 still an issue when a sprite appears in front of a fog boundary, but because
 this is already a huge visual improvement I am going to go ahead and push
 this.

---
 src/swrenderer/scene/r_translucent_pass.cpp | 4 ++++
 src/swrenderer/segments/r_drawsegment.cpp   | 1 +
 src/swrenderer/segments/r_drawsegment.h     | 1 +
 3 files changed, 6 insertions(+)

diff --git a/src/swrenderer/scene/r_translucent_pass.cpp b/src/swrenderer/scene/r_translucent_pass.cpp
index 6afa2fcc9b..2e15a0a21a 100644
--- a/src/swrenderer/scene/r_translucent_pass.cpp
+++ b/src/swrenderer/scene/r_translucent_pass.cpp
@@ -163,8 +163,12 @@ namespace swrenderer
 			if (ds->fake) continue;
 			if (ds->maskedtexturecol != nullptr || ds->bFogBoundary)
 			{
+				if (renew && ds->bRenewDrawn)
+					continue;
 				RenderDrawSegment renderer(Thread);
 				renderer.Render(ds, ds->x1, ds->x2);
+				if (renew && ds->bFogBoundary)
+					ds->bRenewDrawn = true;
 			}
 		}
 	}
diff --git a/src/swrenderer/segments/r_drawsegment.cpp b/src/swrenderer/segments/r_drawsegment.cpp
index 6d8d507077..846800e035 100644
--- a/src/swrenderer/segments/r_drawsegment.cpp
+++ b/src/swrenderer/segments/r_drawsegment.cpp
@@ -85,6 +85,7 @@ namespace swrenderer
 
 	void DrawSegmentList::Push(DrawSegment *segment)
 	{
+		segment->bRenewDrawn = false;
 		Segments.Push(segment);
 	}
 
diff --git a/src/swrenderer/segments/r_drawsegment.h b/src/swrenderer/segments/r_drawsegment.h
index 5480ac4f24..26751b2e66 100644
--- a/src/swrenderer/segments/r_drawsegment.h
+++ b/src/swrenderer/segments/r_drawsegment.h
@@ -39,6 +39,7 @@ namespace swrenderer
 		uint8_t silhouette; // 0=none, 1=bottom, 2=top, 3=both
 		uint8_t bFogBoundary;
 		uint8_t bFakeBoundary; // for fake walls
+		bool bRenewDrawn;
 		int shade;
 		bool foggy;