From 04b4e1d93bce29dfbfb105cc5550bc03e421f71a Mon Sep 17 00:00:00 2001
From: Monster Iestyn <iestynjealous@ntlworld.com>
Date: Sat, 18 Aug 2018 23:31:20 +0100
Subject: [PATCH] Fix glitches with flats visible when looking up/down in 1st
 person

---
 src/r_main.c  | 4 +++-
 src/r_plane.c | 2 +-
 src/r_plane.h | 2 +-
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/r_main.c b/src/r_main.c
index e50e80013..5f9d0afde 100644
--- a/src/r_main.c
+++ b/src/r_main.c
@@ -621,7 +621,7 @@ void R_ExecuteSetViewSize(void)
 	if (rendermode == render_soft)
 	{
 		// this is only used for planes rendering in software mode
-		j = viewheight*4;
+		j = viewheight*8;
 		for (i = 0; i < j; i++)
 		{
 			dy = ((i - viewheight*2)<<FRACBITS) + FRACUNIT/2;
@@ -968,6 +968,7 @@ void R_SkyboxFrame(player_t *player)
 
 	// recalc necessary stuff for mouseaiming
 	// slopes are already calculated for the full possible view (which is 4*viewheight).
+	// 18/08/18: (No it's actually 8*viewheight, thanks MPC aka Jimita for finding this out)
 
 	if (rendermode == render_soft)
 	{
@@ -1093,6 +1094,7 @@ void R_SetupFrame(player_t *player, boolean skybox)
 
 	// recalc necessary stuff for mouseaiming
 	// slopes are already calculated for the full possible view (which is 4*viewheight).
+	// 18/08/18: (No it's actually 8*viewheight, thanks MPC aka Jimita for finding this out)
 
 	if (rendermode == render_soft)
 	{
diff --git a/src/r_plane.c b/src/r_plane.c
index b7b9eaff3..2d74acb4d 100644
--- a/src/r_plane.c
+++ b/src/r_plane.c
@@ -86,7 +86,7 @@ static fixed_t planeheight;
 //                (this is to calculate yslopes only when really needed)
 //                (when mouselookin', yslope is moving into yslopetab)
 //                Check R_SetupFrame, R_SetViewSize for more...
-fixed_t yslopetab[MAXVIDHEIGHT*4];
+fixed_t yslopetab[MAXVIDHEIGHT*8];
 fixed_t *yslope;
 
 fixed_t distscale[MAXVIDWIDTH];
diff --git a/src/r_plane.h b/src/r_plane.h
index 16c8c12a4..43534f43d 100644
--- a/src/r_plane.h
+++ b/src/r_plane.h
@@ -75,7 +75,7 @@ extern INT16 *lastopening, *openings;
 extern size_t maxopenings;
 
 extern INT16 floorclip[MAXVIDWIDTH], ceilingclip[MAXVIDWIDTH];
-extern fixed_t frontscale[MAXVIDWIDTH], yslopetab[MAXVIDHEIGHT*4];
+extern fixed_t frontscale[MAXVIDWIDTH], yslopetab[MAXVIDHEIGHT*8];
 extern fixed_t cachedheight[MAXVIDHEIGHT];
 extern fixed_t cacheddistance[MAXVIDHEIGHT];
 extern fixed_t cachedxstep[MAXVIDHEIGHT];