From cc52f893728b0b4eedacda7cf6ef26cc3618c3bc Mon Sep 17 00:00:00 2001
From: Christoph Oelckers <coelckers@users.noreply.github.com>
Date: Sun, 16 Dec 2018 12:05:28 +0100
Subject: [PATCH] - fixed: For non-persistent buffers, sprite vertices need to
 be recalculated in the splitter code of the translucent sorter.

---
 src/hwrenderer/scene/hw_drawlist.cpp | 14 ++++++++++++--
 src/hwrenderer/scene/hw_drawlist.h   |  2 +-
 src/hwrenderer/scene/hw_sprites.cpp  |  1 +
 3 files changed, 14 insertions(+), 3 deletions(-)

diff --git a/src/hwrenderer/scene/hw_drawlist.cpp b/src/hwrenderer/scene/hw_drawlist.cpp
index 067c5dee5f..0cf6a8010f 100644
--- a/src/hwrenderer/scene/hw_drawlist.cpp
+++ b/src/hwrenderer/scene/hw_drawlist.cpp
@@ -483,7 +483,7 @@ inline double CalcIntersectionVertex(GLSprite *s, GLWall * w2)
 	return ((ay - cy)*(dx - cx) - (ax - cx)*(dy - cy)) / ((bx - ax)*(dy - cy) - (by - ay)*(dx - cx));
 }
 
-void HWDrawList::SortSpriteIntoWall(SortNode * head,SortNode * sort)
+void HWDrawList::SortSpriteIntoWall(HWDrawInfo *di, SortNode * head,SortNode * sort)
 {
 	GLWall *wh= walls[drawitems[head->itemindex].index];
 	GLSprite * ss= sprites[drawitems[sort->itemindex].index];
@@ -560,6 +560,16 @@ void HWDrawList::SortSpriteIntoWall(SortNode * head,SortNode * sort)
 			head->AddToLeft(sort);
 			head->AddToRight(sort2);
 		}
+		if (screen->BuffersArePersistent())
+		{
+			s->vertexindex = ss->vertexindex = -1;
+		}
+		else
+		{
+			s->CreateVertices(di);
+			ss->CreateVertices(di);
+		}
+
 	}
 }
 
@@ -667,7 +677,7 @@ SortNode * HWDrawList::DoSort(HWDrawInfo *di, SortNode * head)
 					break;
 
 				case GLDIT_SPRITE:
-					SortSpriteIntoWall(head,node);
+					SortSpriteIntoWall(di, head, node);
 					break;
 
 				case GLDIT_FLAT: break;
diff --git a/src/hwrenderer/scene/hw_drawlist.h b/src/hwrenderer/scene/hw_drawlist.h
index 303da06fb9..66ae468ed0 100644
--- a/src/hwrenderer/scene/hw_drawlist.h
+++ b/src/hwrenderer/scene/hw_drawlist.h
@@ -101,7 +101,7 @@ public:
 	void SortWallIntoPlane(SortNode * head,SortNode * sort);
 	void SortSpriteIntoPlane(SortNode * head,SortNode * sort);
 	void SortWallIntoWall(HWDrawInfo *di, SortNode * head,SortNode * sort);
-	void SortSpriteIntoWall(SortNode * head,SortNode * sort);
+	void SortSpriteIntoWall(HWDrawInfo *di, SortNode * head,SortNode * sort);
 	int CompareSprites(SortNode * a,SortNode * b);
 	SortNode * SortSpriteList(SortNode * head);
 	SortNode * DoSort(HWDrawInfo *di, SortNode * head);
diff --git a/src/hwrenderer/scene/hw_sprites.cpp b/src/hwrenderer/scene/hw_sprites.cpp
index c3911b4601..f8c716686a 100644
--- a/src/hwrenderer/scene/hw_sprites.cpp
+++ b/src/hwrenderer/scene/hw_sprites.cpp
@@ -244,6 +244,7 @@ void GLSprite::DrawSprite(HWDrawInfo *di, FRenderState &state, bool translucent)
 		{
 			state.SetNormal(0, 0, 0);
 
+
 			if (screen->BuffersArePersistent())
 			{
 				CreateVertices(di);