From 1078be3c3065c01067fec5f12b462b5d8ae2360e Mon Sep 17 00:00:00 2001
From: RedEnchilada <redenchilada@derpymail.com>
Date: Mon, 6 Apr 2015 11:22:27 -0500
Subject: [PATCH] Insert polyobject planes into their proper spot in the draw
 list; replace related hack with other hacks

---
 src/p_polyobj.h |  2 ++
 src/r_bsp.c     |  6 ++++--
 src/r_things.c  | 17 +++++++++++++++--
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/src/p_polyobj.h b/src/p_polyobj.h
index 71cf965e3..3d6576cc6 100644
--- a/src/p_polyobj.h
+++ b/src/p_polyobj.h
@@ -100,6 +100,8 @@ typedef struct polyobj_s
 	UINT8 isBad;         // a bad polyobject: should not be rendered/manipulated
 	INT32 translucency; // index to translucency tables
 
+	struct visplane_s *visplane; // polyobject's visplane, for ease of putting into the list later
+
 	// these are saved for netgames, so do not let Lua touch these!
 	INT32 spawnflags; // Flags the polyobject originally spawned with
 } polyobj_t;
diff --git a/src/r_bsp.c b/src/r_bsp.c
index e967e28ce..fb25b8e4d 100644
--- a/src/r_bsp.c
+++ b/src/r_bsp.c
@@ -978,11 +978,12 @@ static void R_Subsector(size_t num)
 						polysec->floorpic_angle-po->angle,
 						NULL,
 						NULL);
-				ffloor[numffloors].plane->polyobj = po;
+				//ffloor[numffloors].plane->polyobj = po;
 
 				ffloor[numffloors].height = polysec->floorheight;
 				ffloor[numffloors].polyobj = po;
 //				ffloor[numffloors].ffloor = rover;
+				po->visplane = ffloor[numffloors].plane;
 				numffloors++;
 			}
 
@@ -1014,11 +1015,12 @@ static void R_Subsector(size_t num)
 				ffloor[numffloors].plane = R_FindPlane(polysec->ceilingheight, polysec->ceilingpic,
 					polysec->lightlevel, xoff, yoff, polysec->ceilingpic_angle-po->angle,
 					NULL, NULL);
-				ffloor[numffloors].plane->polyobj = po;
+				//ffloor[numffloors].plane->polyobj = po;
 
 				ffloor[numffloors].polyobj = po;
 				ffloor[numffloors].height = polysec->ceilingheight;
 //				ffloor[numffloors].ffloor = rover;
+				po->visplane = ffloor[numffloors].plane;
 				numffloors++;
 			}
 
diff --git a/src/r_things.c b/src/r_things.c
index d64b6bd13..f1b2e7199 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -1682,6 +1682,19 @@ static void R_CreateDrawNodes(void)
 		}
 		if (ds->maskedtexturecol)
 		{
+#ifdef POLYOBJECTS_PLANES
+			// Check for a polyobject plane, but only if this is a front line
+			if (ds->curline->polyseg && ds->curline->polyseg->visplane && !ds->curline->side) {
+				// Put it in!
+
+				entry = R_CreateDrawNode(&nodehead);
+				entry->plane = ds->curline->polyseg->visplane;
+				entry->seg = ds;
+				ds->curline->polyseg->visplane->polyobj = ds->curline->polyseg;
+				ds->curline->polyseg->visplane = NULL;
+			}
+#endif
+
 			entry = R_CreateDrawNode(&nodehead);
 			entry->seg = ds;
 		}
@@ -1698,7 +1711,7 @@ static void R_CreateDrawNodes(void)
 					plane = ds->ffloorplanes[p];
 					R_PlaneBounds(plane);
 
-					if (plane->low < con_clipviewtop || plane->high > vid.height || plane->high > plane->low)
+					if (plane->low < con_clipviewtop || plane->high > vid.height || plane->high > plane->low || plane->polyobj)
 					{
 						ds->ffloorplanes[p] = NULL;
 						continue;
@@ -1809,7 +1822,7 @@ static void R_CreateDrawNodes(void)
 			}
 			else if (r2->seg)
 			{
-#ifdef POLYOBJECTS_PLANES
+#if 0 //#ifdef POLYOBJECTS_PLANES
 				if (r2->seg->curline->polyseg && rover->mobj && P_MobjInsidePolyobj(r2->seg->curline->polyseg, rover->mobj)) {
 					// Determine if we need to sort in front of the polyobj, based on the planes. This fixes the issue where
 					// polyobject planes render above the object standing on them. (A bit hacky... but it works.) -Red