From 14ed02e08dffc05549ac5c63e65ad17cd158020f Mon Sep 17 00:00:00 2001
From: Fabian Greffrath <fabian@greffrath.com>
Date: Tue, 7 May 2024 09:54:49 +0200
Subject: [PATCH] limit max distance for vissprites to 8192 map units as before

But don't rely on an integer overflow this time.

This increases FPS from 9 to 28 in the opening scene of comatose.wad
---
 src/r_things.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/r_things.c b/src/r_things.c
index ee929684..bc363392 100644
--- a/src/r_things.c
+++ b/src/r_things.c
@@ -47,6 +47,7 @@
 #include "z_zone.h"
 
 #define MINZ        (FRACUNIT*4)
+#define MAXZ        (FRACUNIT*8192)
 #define BASEYCENTER 100
 
 typedef struct {
@@ -539,7 +540,7 @@ void R_ProjectSprite (mobj_t* thing)
   tz = gxt-gyt;
 
   // thing is behind view plane?
-  if (tz < MINZ)
+  if (tz < MINZ || tz > MAXZ)
     return;
 
   xscale = FixedDiv(projection, tz);