Split Clear into two functions

src/swrenderer/plane/r_visibleplanelist.cpp

@@ -64,33 +64,30 @@ namespace swrenderer
 		return newplane;
 	}
 
-	void VisiblePlaneList::Clear(bool fullclear)
+	void VisiblePlaneList::Clear()
 	{
-		// Don't clear fake planes if not doing a full clear.
-		if (!fullclear)
+		for (int i = 0; i <= MAXVISPLANES; i++)
+			visplanes[i] = nullptr;
+	}
+
+	void VisiblePlaneList::ClearKeepFakePlanes()
+	{
+		for (int i = 0; i <= MAXVISPLANES - 1; i++)
 		{
-			for (int i = 0; i <= MAXVISPLANES - 1; i++)
+			for (VisiblePlane **probe = &visplanes[i]; *probe != nullptr; )
 			{
-				for (VisiblePlane **probe = &visplanes[i]; *probe != nullptr; )
-				{
-					if ((*probe)->sky < 0)
-					{ // fake: move past it
-						probe = &(*probe)->next;
-					}
-					else
-					{ // not fake: move from list
-						VisiblePlane *vis = *probe;
-						*probe = vis->next;
-						vis->next = nullptr;
-					}
+				if ((*probe)->sky < 0)
+				{ // fake: move past it
+					probe = &(*probe)->next;
+				}
+				else
+				{ // not fake: move from list
+					VisiblePlane *vis = *probe;
+					*probe = vis->next;
+					vis->next = nullptr;
 				}
 			}
 		}
-		else
-		{
-			for (int i = 0; i <= MAXVISPLANES; i++)
-				visplanes[i] = nullptr;
-		}
 	}
 
 	VisiblePlane *VisiblePlaneList::FindPlane(const secplane_t &height, FTextureID picnum, int lightlevel, double Alpha, bool additive, const FTransform &xxform, int sky, FSectorPortal *portal, FDynamicColormap *basecolormap)

src/swrenderer/plane/r_visibleplanelist.h

@@ -27,7 +27,8 @@ namespace swrenderer
 	public:
 		static VisiblePlaneList *Instance();
 
-		void Clear(bool fullclear);
+		void Clear();
+		void ClearKeepFakePlanes();
 
 		VisiblePlane *FindPlane(const secplane_t &height, FTextureID picnum, int lightlevel, double Alpha, bool additive, const FTransform &xxform, int sky, FSectorPortal *portal, FDynamicColormap *basecolormap);
 		VisiblePlane *GetRange(VisiblePlane *pl, int start, int stop);

src/swrenderer/scene/r_portal.cpp

@@ -165,7 +165,7 @@ namespace swrenderer
 			R_SetViewAngle();
 			validcount++;	// Make sure we see all sprites
 
-			planes->Clear(false);
+			planes->ClearKeepFakePlanes();
 			RenderClipSegment::Instance()->Clear(pl->left, pl->right);
 			WindowLeft = pl->left;
 			WindowRight = pl->right;
@@ -408,7 +408,7 @@ namespace swrenderer
 		PortalDrawseg* prevpds = CurrentPortal;
 		CurrentPortal = pds;
 
-		VisiblePlaneList::Instance()->Clear(false);
+		VisiblePlaneList::Instance()->ClearKeepFakePlanes();
 		RenderClipSegment::Instance()->Clear(pds->x1, pds->x2);
 
 		WindowLeft = pds->x1;

src/swrenderer/scene/r_scene.cpp

@@ -133,7 +133,7 @@ namespace swrenderer
 		// Clear buffers.
 		RenderClipSegment::Instance()->Clear(0, viewwidth);
 		R_ClearDrawSegs();
-		VisiblePlaneList::Instance()->Clear(true);
+		VisiblePlaneList::Instance()->Clear();
 		RenderTranslucentPass::Clear();
 
 		// opening / clipping determination