From 432b86fdeb710416f59be6843fac5813ba98e2bc Mon Sep 17 00:00:00 2001
From: "Boris I. Bendovsky" <bibendovsky@hotmail.com>
Date: Wed, 25 Nov 2020 20:38:21 +0200
Subject: [PATCH] Calculate EFX density as in EFX-Util

---
 neo/sound/snd_efxfile.cpp | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/neo/sound/snd_efxfile.cpp b/neo/sound/snd_efxfile.cpp
index 594afe8b..014f1013 100644
--- a/neo/sound/snd_efxfile.cpp
+++ b/neo/sound/snd_efxfile.cpp
@@ -199,8 +199,13 @@ bool idEFXFile::ReadEffect( idLexer &src, idSoundEffect *effect ) {
 			// <+KittyCat> the "environment" token should be ignored (efx has nothing equatable to it)
 			src.ParseInt();
 		} else if ( token == "environment size" ) {
+			//
+			// The formula for density according to Creative's EFX-Util.lib:
+			//    density = clamp(pow(size, 3) / 16, 0, 1)
+			//
 			float size = src.ParseFloat();
-			efxf(AL_EAXREVERB_DENSITY, (size < 2.0f) ? (size - 1.0f) : 1.0f);
+			size = idMath::ClampFloat(0.0f, 1.0f, (size * size * size) / 16.0f);
+			efxf(AL_EAXREVERB_DENSITY, size);
 		} else if ( token == "environment diffusion" ) {
 			efxf(AL_EAXREVERB_DIFFUSION, src.ParseFloat());
 		} else if ( token == "room" ) {