From 726f435d29d9c341fad8dc9fdcda3ffdfbb320e8 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Thu, 9 Jan 2025 20:19:43 +0100
Subject: proper attenuation calculation

---
 world/src/mesh.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'world/src/mesh.rs')

diff --git a/world/src/mesh.rs b/world/src/mesh.rs
index 7352583..a38980e 100644
--- a/world/src/mesh.rs
+++ b/world/src/mesh.rs
@@ -282,7 +282,8 @@ pub fn import_mesh(
         let g_attenuation = p.material().volume().map(|v| {
             let ref_dist = v.attenuation_distance();
             Vec3A::from_array(v.attenuation_color().map(
-                |factor| factor * ref_dist, // TODO figure out how that is converted
+                // manually derived from attenuation coefficient formula. i hope this is correct.
+                |factor| -(factor.powf(1. / ref_dist)).ln(),
             ))
         });
         let g_refractive_index = p.material().ior();
-- 
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