From 6734fbc49aed0fc807d53a73180f4be7587d70c7 Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Sun, 23 Feb 2020 18:44:22 -0600
Subject: [PATCH 01/13] Fix MD2 rollangle in reverse gravity

---
 src/hardware/hw_md2.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/hardware/hw_md2.c b/src/hardware/hw_md2.c
index 5c3cd40a6..c9b78bc79 100644
--- a/src/hardware/hw_md2.c
+++ b/src/hardware/hw_md2.c
@@ -1478,7 +1478,7 @@ boolean HWR_DrawModel(gr_vissprite_t *spr)
 
 			// rotation pivot
 			p.centerx = FIXED_TO_FLOAT(spr->mobj->radius/2);
-			p.centery = FIXED_TO_FLOAT(spr->mobj->height/2);
+			p.centery = FIXED_TO_FLOAT(spr->mobj->height/(flip ? -2 : 2));
 
 			// rotation axis
 			if (sprinfo->available)
@@ -1490,6 +1490,9 @@ boolean HWR_DrawModel(gr_vissprite_t *spr)
 				p.rollflip = 1;
 			else if ((sprframe->rotate & SRF_LEFT) && (ang >= ANGLE_180)) // See from left
 				p.rollflip = -1;
+
+			if (flip)
+				p.rollflip *= -1;
 		}
 
 		p.anglex = 0.0f;

From 1e656618f66ee46a2ef2f784f8f3fde7324005ea Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Mon, 24 Feb 2020 11:44:27 -0600
Subject: [PATCH 02/13] Allow using lump names in ExecCfg

---
 src/dehacked.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/src/dehacked.c b/src/dehacked.c
index dea0289b9..38330606a 100644
--- a/src/dehacked.c
+++ b/src/dehacked.c
@@ -3889,7 +3889,26 @@ static void readmaincfg(MYFILE *f)
 			value = atoi(word2); // used for numerical settings
 
 			if (fastcmp(word, "EXECCFG"))
-				COM_BufAddText(va("exec %s\n", word2));
+			{
+				if (strchr(word2, '.'))
+					COM_BufAddText(va("exec %s\n", word2));
+				else
+				{
+					lumpnum_t lumpnum;
+					char newname[9];
+
+					strncpy(newname, word2, 8);
+
+					newname[8] = '\0';
+
+					lumpnum = W_CheckNumForName(newname);
+
+					if (lumpnum == LUMPERROR || W_LumpLength(lumpnum) == 0)
+						CONS_Debug(DBG_SETUP, "SOC Error: script lump %s not found/not valid.\n", newname);
+					else
+						COM_BufInsertText(W_CacheLumpNum(lumpnum, PU_CACHE));
+				}
+			}
 
 			else if (fastcmp(word, "SPSTAGE_START"))
 			{
@@ -7477,7 +7496,7 @@ static const char *const STATE_LIST[] = { // array length left dynamic for sanit
 
 	// Got Flag Sign
 	"S_GOTFLAG",
-	
+
 	// Finish flag
 	"S_FINISHFLAG",
 

From d3218a2431a9e75ed8c6c895ceae78c6223177a3 Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Mon, 24 Feb 2020 11:44:45 -0600
Subject: [PATCH 03/13] Fix ExecCfg not working on files added via command line

---
 src/d_main.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/d_main.c b/src/d_main.c
index 904ab3bf1..1af7857ee 100644
--- a/src/d_main.c
+++ b/src/d_main.c
@@ -1152,6 +1152,12 @@ void D_SRB2Main(void)
 	if (M_CheckParm("-password") && M_IsNextParm())
 		D_SetPassword(M_GetNextParm());
 
+	CONS_Printf("Z_Init(): Init zone memory allocation daemon. \n");
+	Z_Init();
+
+	// Do this up here so that WADs loaded through the command line can use ExecCfg
+	COM_Init();
+
 	// add any files specified on the command line with -file wadfile
 	// to the wad list
 	if (!(M_CheckParm("-connect") && !M_CheckParm("-server")))
@@ -1179,9 +1185,6 @@ void D_SRB2Main(void)
 	if (M_CheckParm("-server") || dedicated)
 		netgame = server = true;
 
-	CONS_Printf("Z_Init(): Init zone memory allocation daemon. \n");
-	Z_Init();
-
 	// adapt tables to SRB2's needs, including extra slots for dehacked file support
 	P_PatchInfoTables();
 
@@ -1253,7 +1256,6 @@ void D_SRB2Main(void)
 	CONS_Printf("HU_Init(): Setting up heads up display.\n");
 	HU_Init();
 
-	COM_Init();
 	CON_Init();
 
 	D_RegisterServerCommands();

From 614bbafc1bd814394627dafb612faa3f2f033114 Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Mon, 24 Feb 2020 11:45:22 -0600
Subject: [PATCH 04/13] Increase COM_BUF_SIZE

The config file is starting to get close to the old max,
so this should be enough headroom for a while...
---
 src/command.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/command.c b/src/command.c
index d1eea6052..abe6bcedf 100644
--- a/src/command.c
+++ b/src/command.c
@@ -80,7 +80,7 @@ static boolean joyaxis2_default = false;
 static INT32 joyaxis_count = 0;
 static INT32 joyaxis2_count = 0;
 
-#define COM_BUF_SIZE 8192 // command buffer size
+#define COM_BUF_SIZE (32<<10) // command buffer size
 #define MAX_ALIAS_RECURSION 100 // max recursion allowed for aliases
 
 static INT32 com_wait; // one command per frame (for cmd sequences)

From 8219268f2e9b83ee93b4a7a055b03977381f9418 Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Sat, 21 Mar 2020 01:36:39 -0500
Subject: [PATCH 05/13] Add support for srb2:// URL handler (server links)

---
 src/d_main.c | 27 +++++++++++++++++++++++++--
 src/i_tcp.c  |  9 ++++++---
 src/m_argv.c | 18 ++++++++++++++++++
 src/m_argv.h |  3 +++
 4 files changed, 52 insertions(+), 5 deletions(-)

diff --git a/src/d_main.c b/src/d_main.c
index 3840e77a0..d954fa4d1 100644
--- a/src/d_main.c
+++ b/src/d_main.c
@@ -889,6 +889,29 @@ static void IdentifyVersion(void)
 	char *srb2wad;
 	const char *srb2waddir = NULL;
 
+	// URL handlers are opened by web browsers (at least Firefox) from the browser's working directory, not the game's stored directory,
+	// so chdir to that directory unless overridden.
+	if (M_GetUrlProtocolArg() != NULL && !M_CheckParm("-nochdir"))
+	{
+		size_t i;
+
+		CONS_Printf("srb2:// connect links load game files from the SRB2 application's stored directory. Switching to ");
+		strlcpy(srb2path, myargv[0], sizeof(srb2path));
+
+		// Get just the directory, minus the EXE name
+		for (i = strlen(srb2path)-1; i > 0; i--)
+		{
+			if (srb2path[i] == '/' || srb2path[i] == '\\')
+			{
+				srb2path[i] = '\0';
+				break;
+			}
+		}
+
+		CONS_Printf("%s\n", srb2path);
+		chdir(srb2path);
+	}
+
 #if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)
 	// change to the directory where 'srb2.pk3' is found
 	srb2waddir = I_LocateWad();
@@ -1152,7 +1175,7 @@ void D_SRB2Main(void)
 
 	// add any files specified on the command line with -file wadfile
 	// to the wad list
-	if (!(M_CheckParm("-connect") && !M_CheckParm("-server")))
+	if (!((M_GetUrlProtocolArg() || M_CheckParm("-connect")) && !M_CheckParm("-server")))
 	{
 		if (M_CheckParm("-file"))
 		{
@@ -1187,7 +1210,7 @@ void D_SRB2Main(void)
 	M_InitMenuPresTables();
 
 	// init title screen display params
-	if (M_CheckParm("-connect"))
+	if (M_GetUrlProtocolArg() || M_CheckParm("-connect"))
 		F_InitMenuPresValues();
 
 	//---------------------------------------------------- READY TIME
diff --git a/src/i_tcp.c b/src/i_tcp.c
index 34cad1765..373ea1bd0 100644
--- a/src/i_tcp.c
+++ b/src/i_tcp.c
@@ -1423,6 +1423,7 @@ static void SOCK_ClearBans(void)
 boolean I_InitTcpNetwork(void)
 {
 	char serverhostname[255];
+	const char *urlparam = NULL;
 	boolean ret = false;
 	// initilize the OS's TCP/IP stack
 	if (!I_InitTcpDriver())
@@ -1476,10 +1477,12 @@ boolean I_InitTcpNetwork(void)
 
 		ret = true;
 	}
-	else if (M_CheckParm("-connect"))
+	else if ((urlparam = M_GetUrlProtocolArg()) != NULL || M_CheckParm("-connect"))
 	{
-		if (M_IsNextParm())
-			strcpy(serverhostname, M_GetNextParm());
+		if (urlparam != NULL)
+			strlcpy(serverhostname, urlparam, sizeof(serverhostname));
+		else if (M_IsNextParm())
+			strlcpy(serverhostname, M_GetNextParm(), sizeof(serverhostname));
 		else
 			serverhostname[0] = 0; // assuming server in the LAN, use broadcast to detect it
 
diff --git a/src/m_argv.c b/src/m_argv.c
index acb74cff4..d7d1f4463 100644
--- a/src/m_argv.c
+++ b/src/m_argv.c
@@ -34,6 +34,24 @@ boolean myargmalloc = false;
 */
 static INT32 found;
 
+/**	\brief Parses a server URL (such as srb2://127.0.0.1) as may be passed to the game via a web browser, etc.
+
+	\return the contents of the URL after the protocol (a server to join), or NULL if not found
+*/
+const char *M_GetUrlProtocolArg(void)
+{
+	INT32 i;
+
+	for (i = 1; i < myargc; i++)
+	{
+		if (!strnicmp(myargv[i], "srb2://", 7))
+		{
+			return &myargv[i][7];
+		}
+	}
+
+	return NULL;
+}
 
 /**	\brief	The M_CheckParm function
 
diff --git a/src/m_argv.h b/src/m_argv.h
index ca97d9b12..92770f4e9 100644
--- a/src/m_argv.h
+++ b/src/m_argv.h
@@ -21,6 +21,9 @@ extern INT32 myargc;
 extern char **myargv;
 extern boolean myargmalloc;
 
+// Looks for an srb2:// (or similar) URL passed in as an argument and returns the IP to connect to if found.
+const char *M_GetUrlProtocolArg(void);
+
 // Returns the position of the given parameter in the arg list (0 if not found).
 INT32 M_CheckParm(const char *check);
 

From ee754b211f8072a1b5410adf8deeb0c345b2b963 Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Sat, 21 Mar 2020 07:47:29 -0500
Subject: [PATCH 06/13] Define SERVER_URL_PROTOCOL const for easy
 reconfiguration

---
 src/d_main.c  | 2 +-
 src/doomdef.h | 3 +++
 src/m_argv.c  | 5 +++--
 3 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/d_main.c b/src/d_main.c
index d954fa4d1..ec63242b8 100644
--- a/src/d_main.c
+++ b/src/d_main.c
@@ -895,7 +895,7 @@ static void IdentifyVersion(void)
 	{
 		size_t i;
 
-		CONS_Printf("srb2:// connect links load game files from the SRB2 application's stored directory. Switching to ");
+		CONS_Printf("%s connect links load game files from the SRB2 application's stored directory. Switching to ", SERVER_URL_PROTOCOL);
 		strlcpy(srb2path, myargv[0], sizeof(srb2path));
 
 		// Get just the directory, minus the EXE name
diff --git a/src/doomdef.h b/src/doomdef.h
index 71c885019..5a5c933e3 100644
--- a/src/doomdef.h
+++ b/src/doomdef.h
@@ -150,6 +150,9 @@ extern char logfilename[1024];
 // Otherwise we can't force updates!
 #endif
 
+/* A custom URL protocol for server links. */
+#define SERVER_URL_PROTOCOL "srb2://"
+
 // Does this version require an added patch file?
 // Comment or uncomment this as necessary.
 #define USE_PATCH_DTA
diff --git a/src/m_argv.c b/src/m_argv.c
index d7d1f4463..7d43d96bc 100644
--- a/src/m_argv.c
+++ b/src/m_argv.c
@@ -41,12 +41,13 @@ static INT32 found;
 const char *M_GetUrlProtocolArg(void)
 {
 	INT32 i;
+	const size_t len = strlen(SERVER_URL_PROTOCOL);
 
 	for (i = 1; i < myargc; i++)
 	{
-		if (!strnicmp(myargv[i], "srb2://", 7))
+		if (strlen(myargv[i]) > len && !strnicmp(myargv[i], SERVER_URL_PROTOCOL, len))
 		{
-			return &myargv[i][7];
+			return &myargv[i][len];
 		}
 	}
 

From 3bf609e819762374f3291a5e1144cef638eb0f13 Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Sun, 22 Mar 2020 12:13:59 -0500
Subject: [PATCH 07/13] GL horizon lines

---
 src/hardware/hw_main.c | 172 ++++++++++++++++++++++-------------------
 1 file changed, 92 insertions(+), 80 deletions(-)

diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index efed9b602..a3a1ba692 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -20,6 +20,7 @@
 
 #include "../doomstat.h"
 
+#define HWRENDER
 #ifdef HWRENDER
 #include "hw_glob.h"
 #include "hw_light.h"
@@ -469,7 +470,7 @@ static UINT8 HWR_FogBlockAlpha(INT32 light, UINT32 color) // Let's see if this c
 // -----------------+
 // HWR_RenderPlane  : Render a floor or ceiling convex polygon
 // -----------------+
-static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, boolean isceiling, fixed_t fixedheight,
+static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, boolean isceiling, fixed_t fixedheight,
                            FBITFIELD PolyFlags, INT32 lightlevel, levelflat_t *levelflat, sector_t *FOFsector, UINT8 alpha, boolean fogplane, extracolormap_t *planecolormap)
 {
 	polyvertex_t *  pv;
@@ -493,8 +494,6 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, boolean is
 	static FOutVector *planeVerts = NULL;
 	static UINT16 numAllocedPlaneVerts = 0;
 
-	(void)sector; ///@TODO remove shitty unused variable
-
 	// no convex poly were generated for this subsector
 	if (!xsub->planepoly)
 		return;
@@ -593,8 +592,6 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, boolean is
 	flatyref = (float)(((fixed_t)pv->y & (~flatflag)) / fflatheight);
 
 	// transform
-	v3d = planeVerts;
-
 	if (FOFsector != NULL)
 	{
 		if (!isceiling) // it's a floor
@@ -637,46 +634,43 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, boolean is
 		flatyref = (FIXED_TO_FLOAT(FixedMul(tempxsow, FINESINE(angle)) + FixedMul(tempytow, FINECOSINE(angle))));
 	}
 
-	for (i = 0; i < nrPlaneVerts; i++,v3d++,pv++)
-	{
-		// Hurdler: add scrolling texture on floor/ceiling
-		if (texflat)
-		{
-			v3d->sow = (float)(pv->x / fflatwidth) + scrollx;
-			v3d->tow = -(float)(pv->y / fflatheight) + scrolly;
-		}
-		else
-		{
-			v3d->sow = (float)((pv->x / fflatwidth) - flatxref + scrollx);
-			v3d->tow = (float)(flatyref - (pv->y / fflatheight) + scrolly);
-		}
+#define SETUP3DVERT(vert, vx, vy) {\
+		/* Hurdler: add scrolling texture on floor/ceiling */\
+		if (texflat)\
+		{\
+			vert->sow = (float)((vx) / fflatwidth) + scrollx;\
+			vert->tow = -(float)((vy) / fflatheight) + scrolly;\
+		}\
+		else\
+		{\
+			vert->sow = (float)(((vx) / fflatwidth) - flatxref + scrollx);\
+			vert->tow = (float)(flatyref - ((vy) / fflatheight) + scrolly);\
+		}\
+\
+		/* Need to rotate before translate */\
+		if (angle) /* Only needs to be done if there's an altered angle */\
+		{\
+			tempxsow = FLOAT_TO_FIXED(vert->sow);\
+			tempytow = FLOAT_TO_FIXED(vert->tow);\
+			if (texflat)\
+				tempytow = -tempytow;\
+			vert->sow = (FIXED_TO_FLOAT(FixedMul(tempxsow, FINECOSINE(angle)) - FixedMul(tempytow, FINESINE(angle))));\
+			vert->tow = (FIXED_TO_FLOAT(FixedMul(tempxsow, FINESINE(angle)) + FixedMul(tempytow, FINECOSINE(angle))));\
+		}\
+\
+		vert->x = (vx);\
+		vert->y = height;\
+		vert->z = (vy);\
+\
+		if (slope)\
+		{\
+			fixedheight = P_GetZAt(slope, FLOAT_TO_FIXED((vx)), FLOAT_TO_FIXED((vy)));\
+			vert->y = FIXED_TO_FLOAT(fixedheight);\
+		}\
+}
 
-		// Need to rotate before translate
-		if (angle) // Only needs to be done if there's an altered angle
-		{
-			tempxsow = FLOAT_TO_FIXED(v3d->sow);
-			tempytow = FLOAT_TO_FIXED(v3d->tow);
-			if (texflat)
-				tempytow = -tempytow;
-			v3d->sow = (FIXED_TO_FLOAT(FixedMul(tempxsow, FINECOSINE(angle)) - FixedMul(tempytow, FINESINE(angle))));
-			v3d->tow = (FIXED_TO_FLOAT(FixedMul(tempxsow, FINESINE(angle)) + FixedMul(tempytow, FINECOSINE(angle))));
-		}
-
-		//v3d->sow = (float)(v3d->sow - flatxref + scrollx);
-		//v3d->tow = (float)(flatyref - v3d->tow + scrolly);
-
-		v3d->x = pv->x;
-		v3d->y = height;
-		v3d->z = pv->y;
-
-#ifdef ESLOPE
-		if (slope)
-		{
-			fixedheight = P_GetZAt(slope, FLOAT_TO_FIXED(pv->x), FLOAT_TO_FIXED(pv->y));
-			v3d->y = FIXED_TO_FLOAT(fixedheight);
-		}
-#endif
-	}
+	for (i = 0, v3d = planeVerts; i < nrPlaneVerts; i++,v3d++,pv++)
+		SETUP3DVERT(v3d, pv->x, pv->y);
 
 	// only useful for flat coloured triangles
 	//Surf.FlatColor = 0xff804020;
@@ -687,38 +681,6 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, boolean is
 	Surf.FlatColor.s.red = Surf.FlatColor.s.green =
 	Surf.FlatColor.s.blue = LightLevelToLum(lightlevel); //  Don't take from the frontsector, or the game will crash
 
-#if 0 // no colormap test
-	// colormap test
-	if (gr_frontsector)
-	{
-		sector_t *psector = gr_frontsector;
-
-#ifdef ESLOPE
-		if (slope)
-			fixedheight = P_GetZAt(slope, psector->soundorg.x, psector->soundorg.y);
-#endif
-
-		if (psector->ffloors)
-		{
-			ffloor_t *caster = psector->lightlist[R_GetPlaneLight(psector, fixedheight, false)].caster;
-			psector = caster ? &sectors[caster->secnum] : psector;
-
-			if (caster)
-			{
-				lightlevel = psector->lightlevel;
-				Surf.FlatColor.s.red = Surf.FlatColor.s.green = Surf.FlatColor.s.blue = LightLevelToLum(lightlevel);
-			}
-		}
-		if (psector->extra_colormap)
-			Surf.FlatColor.rgba = HWR_Lighting(lightlevel,psector->extra_colormap->rgba,psector->extra_colormap->fadergba, false, true);
-		else
-			Surf.FlatColor.rgba = HWR_Lighting(lightlevel,NORMALFOG,FADEFOG, false, true);
-	}
-	else
-		Surf.FlatColor.rgba = HWR_Lighting(lightlevel,NORMALFOG,FADEFOG, false, true);
-
-#endif // NOPE
-
 	if (planecolormap)
 	{
 		if (fogplane)
@@ -744,6 +706,56 @@ static void HWR_RenderPlane(sector_t *sector, extrasubsector_t *xsub, boolean is
 
 	HWD.pfnDrawPolygon(&Surf, planeVerts, nrPlaneVerts, PolyFlags);
 
+	if (subsector)
+	{
+		// Horizon lines
+		FOutVector horizonpts[5];
+		float dist, vx, vy;
+		const float renderdist = 60000.0f; // Well past the Z cutoff plane, but needed to fill out to that point at a wider angle
+
+		seg_t *line = &segs[subsector->firstline];
+
+		for (i = 0; i < subsector->numlines; i++, line++)
+		{
+			if (!line->glseg && line->linedef->special == HORIZONSPECIAL && R_PointOnSegSide(dup_viewx, dup_viewy, line) == 0)
+			{
+				//SETUP3DVERT(horizonpts[1], FIXED_TO_FLOAT(line->v1->x), FIXED_TO_FLOAT(line->v1->y));
+				//SETUP3DVERT(horizonpts[2], FIXED_TO_FLOAT(line->v2->x), FIXED_TO_FLOAT(line->v2->y));
+
+				// Left side
+				vx = ((polyvertex_t *)line->pv1)->x;
+				vy = ((polyvertex_t *)line->pv1)->y;
+				SETUP3DVERT((&horizonpts[1]), vx, vy);
+
+				dist = sqrtf(powf(vx - gr_viewx, 2) + powf(vy - gr_viewy, 2));
+				vx = (vx - gr_viewx) * renderdist / dist + gr_viewx;
+				vy = (vy - gr_viewy) * renderdist / dist + gr_viewy;
+				SETUP3DVERT((&horizonpts[0]), vx, vy);
+
+				// Right side
+				vx = ((polyvertex_t *)line->pv2)->x;
+				vy = ((polyvertex_t *)line->pv2)->y;
+				SETUP3DVERT((&horizonpts[2]), vx, vy);
+
+				dist = sqrtf(powf(vx - gr_viewx, 2) + powf(vy - gr_viewy, 2));
+				vx = (vx - gr_viewx) * renderdist / dist + gr_viewx;
+				vy = (vy - gr_viewy) * renderdist / dist + gr_viewy;
+				SETUP3DVERT((&horizonpts[3]), vx, vy);
+
+				// Midpoint for better filling
+				vx = (horizonpts[0].x + horizonpts[3].x)/2;
+				vy = (horizonpts[0].z + horizonpts[3].z)/2;
+				dist = sqrtf(powf(vx - gr_viewx, 2) + powf(vy - gr_viewy, 2));
+				vx = (vx - gr_viewx) * renderdist / dist + gr_viewx;
+				vy = (vy - gr_viewy) * renderdist / dist + gr_viewy;
+				SETUP3DVERT((&horizonpts[4]), vx, vy);
+
+				// Draw
+				HWD.pfnDrawPolygon(&Surf, horizonpts, 5, PolyFlags);
+			}
+		}
+	}
+
 #ifdef ALAM_LIGHTING
 	// add here code for dynamic lighting on planes
 	HWR_PlaneLighting(planeVerts, nrPlaneVerts);
@@ -3561,7 +3573,7 @@ static void HWR_Subsector(size_t num)
 			if (sub->validcount != validcount)
 			{
 				HWR_GetLevelFlat(&levelflats[gr_frontsector->floorpic]);
-				HWR_RenderPlane(gr_frontsector, &extrasubsectors[num], false,
+				HWR_RenderPlane(sub, &extrasubsectors[num], false,
 					// Hack to make things continue to work around slopes.
 					locFloorHeight == cullFloorHeight ? locFloorHeight : gr_frontsector->floorheight,
 					// We now return you to your regularly scheduled rendering.
@@ -3583,7 +3595,7 @@ static void HWR_Subsector(size_t num)
 			if (sub->validcount != validcount)
 			{
 				HWR_GetLevelFlat(&levelflats[gr_frontsector->ceilingpic]);
-				HWR_RenderPlane(NULL, &extrasubsectors[num], true,
+				HWR_RenderPlane(sub, &extrasubsectors[num], true,
 					// Hack to make things continue to work around slopes.
 					locCeilingHeight == cullCeilingHeight ? locCeilingHeight : gr_frontsector->ceilingheight,
 					// We now return you to your regularly scheduled rendering.
@@ -3677,7 +3689,7 @@ static void HWR_Subsector(size_t num)
 				{
 					HWR_GetLevelFlat(&levelflats[*rover->bottompic]);
 					light = R_GetPlaneLight(gr_frontsector, centerHeight, dup_viewz < cullHeight ? true : false);
-					HWR_RenderPlane(NULL, &extrasubsectors[num], false, *rover->bottomheight, PF_Occlude, *gr_frontsector->lightlist[light].lightlevel, &levelflats[*rover->bottompic],
+					HWR_RenderPlane(sub, &extrasubsectors[num], false, *rover->bottomheight, PF_Occlude, *gr_frontsector->lightlist[light].lightlevel, &levelflats[*rover->bottompic],
 					                rover->master->frontsector, 255, false, *gr_frontsector->lightlist[light].extra_colormap);
 				}
 			}
@@ -3741,7 +3753,7 @@ static void HWR_Subsector(size_t num)
 				{
 					HWR_GetLevelFlat(&levelflats[*rover->toppic]);
 					light = R_GetPlaneLight(gr_frontsector, centerHeight, dup_viewz < cullHeight ? true : false);
-					HWR_RenderPlane(NULL, &extrasubsectors[num], true, *rover->topheight, PF_Occlude, *gr_frontsector->lightlist[light].lightlevel, &levelflats[*rover->toppic],
+					HWR_RenderPlane(sub, &extrasubsectors[num], true, *rover->topheight, PF_Occlude, *gr_frontsector->lightlist[light].lightlevel, &levelflats[*rover->toppic],
 					                  rover->master->frontsector, 255, false, *gr_frontsector->lightlist[light].extra_colormap);
 				}
 			}

From 6749cb89b52381b627c9bef946cfd99b67558719 Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Sun, 22 Mar 2020 12:20:26 -0500
Subject: [PATCH 08/13] Distort far edges to viewz for a flat horizon line

---
 src/hardware/hw_main.c | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index a3a1ba692..253deb282 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -709,9 +709,10 @@ static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, bool
 	if (subsector)
 	{
 		// Horizon lines
-		FOutVector horizonpts[5];
+		FOutVector horizonpts[6];
 		float dist, vx, vy;
-		const float renderdist = 60000.0f; // Well past the Z cutoff plane, but needed to fill out to that point at a wider angle
+		const float renderdist = 30000.0f; // How far out to properly render the plane
+		const float farrenderdist = 32768.0f; // From here, raise plane to horizon level to fill in the line with some texture distortion
 
 		seg_t *line = &segs[subsector->firstline];
 
@@ -742,16 +743,19 @@ static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, bool
 				vy = (vy - gr_viewy) * renderdist / dist + gr_viewy;
 				SETUP3DVERT((&horizonpts[3]), vx, vy);
 
-				// Midpoint for better filling
-				vx = (horizonpts[0].x + horizonpts[3].x)/2;
-				vy = (horizonpts[0].z + horizonpts[3].z)/2;
-				dist = sqrtf(powf(vx - gr_viewx, 2) + powf(vy - gr_viewy, 2));
-				vx = (vx - gr_viewx) * renderdist / dist + gr_viewx;
-				vy = (vy - gr_viewy) * renderdist / dist + gr_viewy;
+				// Horizon fills
+				vx = (horizonpts[0].x - gr_viewx) * farrenderdist / renderdist + gr_viewx;
+				vy = (horizonpts[0].z - gr_viewy) * farrenderdist / renderdist + gr_viewy;
+				SETUP3DVERT((&horizonpts[5]), vx, vy);
+				horizonpts[5].y = gr_viewz;
+
+				vx = (horizonpts[3].x - gr_viewx) * farrenderdist / renderdist + gr_viewx;
+				vy = (horizonpts[3].z - gr_viewy) * farrenderdist / renderdist + gr_viewy;
 				SETUP3DVERT((&horizonpts[4]), vx, vy);
+				horizonpts[4].y = gr_viewz;
 
 				// Draw
-				HWD.pfnDrawPolygon(&Surf, horizonpts, 5, PolyFlags);
+				HWD.pfnDrawPolygon(&Surf, horizonpts, 6, PolyFlags);
 			}
 		}
 	}

From 09c2e4fe26adacf0ea44ef757148478268dae546 Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Sun, 22 Mar 2020 12:52:17 -0500
Subject: [PATCH 09/13] Split horizon lines for minimal distortion

---
 src/hardware/hw_main.c | 78 ++++++++++++++++++++++++++----------------
 1 file changed, 48 insertions(+), 30 deletions(-)

diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index 253deb282..9a0805d57 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -20,7 +20,6 @@
 
 #include "../doomstat.h"
 
-#define HWRENDER
 #ifdef HWRENDER
 #include "hw_glob.h"
 #include "hw_light.h"
@@ -711,6 +710,10 @@ static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, bool
 		// Horizon lines
 		FOutVector horizonpts[6];
 		float dist, vx, vy;
+		float x1, y1, xd, yd;
+		UINT8 numplanes, j;
+		vertex_t v; // For determining the closest distance from the line to the camera, to split render planes for minimum distortion;
+
 		const float renderdist = 30000.0f; // How far out to properly render the plane
 		const float farrenderdist = 32768.0f; // From here, raise plane to horizon level to fill in the line with some texture distortion
 
@@ -720,42 +723,57 @@ static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, bool
 		{
 			if (!line->glseg && line->linedef->special == HORIZONSPECIAL && R_PointOnSegSide(dup_viewx, dup_viewy, line) == 0)
 			{
-				//SETUP3DVERT(horizonpts[1], FIXED_TO_FLOAT(line->v1->x), FIXED_TO_FLOAT(line->v1->y));
-				//SETUP3DVERT(horizonpts[2], FIXED_TO_FLOAT(line->v2->x), FIXED_TO_FLOAT(line->v2->y));
+				P_ClosestPointOnLine(viewx, viewy, line->linedef, &v);
+				dist = FIXED_TO_FLOAT(R_PointToDist(v.x, v.y));
 
-				// Left side
-				vx = ((polyvertex_t *)line->pv1)->x;
-				vy = ((polyvertex_t *)line->pv1)->y;
-				SETUP3DVERT((&horizonpts[1]), vx, vy);
+				x1 = ((polyvertex_t *)line->pv1)->x;
+				y1 = ((polyvertex_t *)line->pv1)->y;
+				xd = ((polyvertex_t *)line->pv2)->x - x1;
+				yd = ((polyvertex_t *)line->pv2)->y - y1;
 
-				dist = sqrtf(powf(vx - gr_viewx, 2) + powf(vy - gr_viewy, 2));
-				vx = (vx - gr_viewx) * renderdist / dist + gr_viewx;
-				vy = (vy - gr_viewy) * renderdist / dist + gr_viewy;
-				SETUP3DVERT((&horizonpts[0]), vx, vy);
+				// Based on the seg length and the distance from the line, split horizon into multiple poly sets to reduce distortion
+				dist = sqrtf((xd*xd) + (yd*yd)) / dist / 16.0f;
+				if (dist > 100.0f)
+					numplanes = 100;
+				else
+					numplanes = (UINT8)dist + 1;
 
-				// Right side
-				vx = ((polyvertex_t *)line->pv2)->x;
-				vy = ((polyvertex_t *)line->pv2)->y;
-				SETUP3DVERT((&horizonpts[2]), vx, vy);
+				for (j = 0; j < numplanes; j++)
+				{
+					// Left side
+					vx = x1 + xd * j / numplanes;
+					vy = y1 + yd * j / numplanes;
+					SETUP3DVERT((&horizonpts[1]), vx, vy);
 
-				dist = sqrtf(powf(vx - gr_viewx, 2) + powf(vy - gr_viewy, 2));
-				vx = (vx - gr_viewx) * renderdist / dist + gr_viewx;
-				vy = (vy - gr_viewy) * renderdist / dist + gr_viewy;
-				SETUP3DVERT((&horizonpts[3]), vx, vy);
+					dist = sqrtf(powf(vx - gr_viewx, 2) + powf(vy - gr_viewy, 2));
+					vx = (vx - gr_viewx) * renderdist / dist + gr_viewx;
+					vy = (vy - gr_viewy) * renderdist / dist + gr_viewy;
+					SETUP3DVERT((&horizonpts[0]), vx, vy);
 
-				// Horizon fills
-				vx = (horizonpts[0].x - gr_viewx) * farrenderdist / renderdist + gr_viewx;
-				vy = (horizonpts[0].z - gr_viewy) * farrenderdist / renderdist + gr_viewy;
-				SETUP3DVERT((&horizonpts[5]), vx, vy);
-				horizonpts[5].y = gr_viewz;
+					// Right side
+					vx = x1 + xd * (j+1) / numplanes;
+					vy = y1 + yd * (j+1) / numplanes;
+					SETUP3DVERT((&horizonpts[2]), vx, vy);
 
-				vx = (horizonpts[3].x - gr_viewx) * farrenderdist / renderdist + gr_viewx;
-				vy = (horizonpts[3].z - gr_viewy) * farrenderdist / renderdist + gr_viewy;
-				SETUP3DVERT((&horizonpts[4]), vx, vy);
-				horizonpts[4].y = gr_viewz;
+					dist = sqrtf(powf(vx - gr_viewx, 2) + powf(vy - gr_viewy, 2));
+					vx = (vx - gr_viewx) * renderdist / dist + gr_viewx;
+					vy = (vy - gr_viewy) * renderdist / dist + gr_viewy;
+					SETUP3DVERT((&horizonpts[3]), vx, vy);
 
-				// Draw
-				HWD.pfnDrawPolygon(&Surf, horizonpts, 6, PolyFlags);
+					// Horizon fills
+					vx = (horizonpts[0].x - gr_viewx) * farrenderdist / renderdist + gr_viewx;
+					vy = (horizonpts[0].z - gr_viewy) * farrenderdist / renderdist + gr_viewy;
+					SETUP3DVERT((&horizonpts[5]), vx, vy);
+					horizonpts[5].y = gr_viewz;
+
+					vx = (horizonpts[3].x - gr_viewx) * farrenderdist / renderdist + gr_viewx;
+					vy = (horizonpts[3].z - gr_viewy) * farrenderdist / renderdist + gr_viewy;
+					SETUP3DVERT((&horizonpts[4]), vx, vy);
+					horizonpts[4].y = gr_viewz;
+
+					// Draw
+					HWD.pfnDrawPolygon(&Surf, horizonpts, 6, PolyFlags);
+				}
 			}
 		}
 	}

From 61c5005972429fed781c82a6078ba6bd0018a57a Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Mon, 23 Mar 2020 08:23:36 -0500
Subject: [PATCH 10/13] Reduce near renderdist to lessen visible texture
 distortion

---
 src/hardware/hw_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/hardware/hw_main.c b/src/hardware/hw_main.c
index 9a0805d57..62464c951 100644
--- a/src/hardware/hw_main.c
+++ b/src/hardware/hw_main.c
@@ -714,7 +714,7 @@ static void HWR_RenderPlane(subsector_t *subsector, extrasubsector_t *xsub, bool
 		UINT8 numplanes, j;
 		vertex_t v; // For determining the closest distance from the line to the camera, to split render planes for minimum distortion;
 
-		const float renderdist = 30000.0f; // How far out to properly render the plane
+		const float renderdist = 27000.0f; // How far out to properly render the plane
 		const float farrenderdist = 32768.0f; // From here, raise plane to horizon level to fill in the line with some texture distortion
 
 		seg_t *line = &segs[subsector->firstline];

From 8001511b7cc3e1c8548eb3ec11430dd5831753eb Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Thu, 9 Apr 2020 20:52:23 -0500
Subject: [PATCH 11/13] Make chdir usage consistent with other source usage

---
 src/d_main.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/d_main.c b/src/d_main.c
index 8519e6281..80f075cb1 100644
--- a/src/d_main.c
+++ b/src/d_main.c
@@ -909,7 +909,13 @@ static void IdentifyVersion(void)
 		}
 
 		CONS_Printf("%s\n", srb2path);
-		chdir(srb2path);
+
+#if defined (_WIN32)
+		SetCurrentDirectoryA(srb2path);
+#else
+		if (chdir(srb2path) == -1)
+			I_OutputMsg("Couldn't change working directory\n");
+#endif
 	}
 
 #if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)

From 1844aa144503a0dd8d43b29eb7f86992cbf14fda Mon Sep 17 00:00:00 2001
From: fickleheart <fickle@tinted.red>
Date: Thu, 9 Apr 2020 20:56:27 -0500
Subject: [PATCH 12/13] Make a separate function instead of clogging up
 IdentifyVersion

---
 src/d_main.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/src/d_main.c b/src/d_main.c
index 80f075cb1..a0672bb4e 100644
--- a/src/d_main.c
+++ b/src/d_main.c
@@ -880,15 +880,10 @@ static inline void D_CleanFile(void)
 	}
 }
 
-// ==========================================================================
-// Identify the SRB2 version, and IWAD file to use.
-// ==========================================================================
-
-static void IdentifyVersion(void)
+///\brief Checks if a netgame URL is being handled, and changes working directory to the EXE's if so.
+///       Done because browsers (at least, Firefox on Windows) launch the game from the browser's directory, which causes problems.
+static void ChangeDirForUrlHandler(void)
 {
-	char *srb2wad;
-	const char *srb2waddir = NULL;
-
 	// URL handlers are opened by web browsers (at least Firefox) from the browser's working directory, not the game's stored directory,
 	// so chdir to that directory unless overridden.
 	if (M_GetUrlProtocolArg() != NULL && !M_CheckParm("-nochdir"))
@@ -917,6 +912,16 @@ static void IdentifyVersion(void)
 			I_OutputMsg("Couldn't change working directory\n");
 #endif
 	}
+}
+
+// ==========================================================================
+// Identify the SRB2 version, and IWAD file to use.
+// ==========================================================================
+
+static void IdentifyVersion(void)
+{
+	char *srb2wad;
+	const char *srb2waddir = NULL;
 
 #if (defined (__unix__) && !defined (MSDOS)) || defined (UNIXCOMMON) || defined (HAVE_SDL)
 	// change to the directory where 'srb2.pk3' is found
@@ -1097,6 +1102,9 @@ void D_SRB2Main(void)
 	// Test Dehacked lists
 	DEH_Check();
 
+	// Netgame URL special case: change working dir to EXE folder.
+	ChangeDirForUrlHandler();
+
 	// identify the main IWAD file to use
 	IdentifyVersion();
 

From 76e93476de66ccf865e3b4f7e10345f80b6f1f3d Mon Sep 17 00:00:00 2001
From: James R <justsomejames2@gmail.com>
Date: Sun, 12 Apr 2020 17:05:18 -0700
Subject: [PATCH 13/13] Make the PACKETVERSION rule easier

---
 src/d_clisrv.h | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/src/d_clisrv.h b/src/d_clisrv.h
index 10a1d714d..2ddebadba 100644
--- a/src/d_clisrv.h
+++ b/src/d_clisrv.h
@@ -20,12 +20,9 @@
 #include "d_player.h"
 
 /*
-The 'packet version' may be used with packets whose
-format is expected to change between versions.
-
-This version is independent of the mod name, and standard
-version and subversion. It should only account for the
-basic fields of the packet, and change infrequently.
+The 'packet version' is used to distinguish packet formats.
+This version is independent of VERSION and SUBVERSION. Different
+applications may follow different packet versions.
 */
 #define PACKETVERSION 2