From cf9bc03ee95f0390dcd28e25d5d5feb24225a369 Mon Sep 17 00:00:00 2001
From: Vladislav Belov <vladislavbelovdev@gmail.com>
Date: Thu, 9 Jan 2025 01:48:56 +0100
Subject: [PATCH] Adds a temporary hack for grass lighting.

The hack uses per-vertex lighting for translucent objects. In the
future we need to use a separate shader.
---
 .../public/art/materials/basic_trans_wind_grain_norm_spec.xml   | 2 +-
 binaries/data/mods/public/shaders/glsl/model_common.fs          | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/binaries/data/mods/public/art/materials/basic_trans_wind_grain_norm_spec.xml b/binaries/data/mods/public/art/materials/basic_trans_wind_grain_norm_spec.xml
index cd4e988718..e9bc74f840 100644
--- a/binaries/data/mods/public/art/materials/basic_trans_wind_grain_norm_spec.xml
+++ b/binaries/data/mods/public/art/materials/basic_trans_wind_grain_norm_spec.xml
@@ -11,5 +11,5 @@
 	<shader effect="model_transparent"/>
 	<uniform name="windData" value="6.0 6.0"/>
 	<!-- TODO: use a separate material for translucent models. -->
-	<uniform name="effectSettings" value="0.0 50.0 0.0075"/>
+	<uniform name="effectSettings" value="0.0 50.0 0.0075 1.0"/>
 </material>
diff --git a/binaries/data/mods/public/shaders/glsl/model_common.fs b/binaries/data/mods/public/shaders/glsl/model_common.fs
index 3157fa4834..0ade538814 100644
--- a/binaries/data/mods/public/shaders/glsl/model_common.fs
+++ b/binaries/data/mods/public/shaders/glsl/model_common.fs
@@ -84,7 +84,7 @@ void main()
 
   #if USE_INSTANCING && USE_NORMAL_MAP
     normal = calculateNormal(normal, SAMPLE_2D(GET_DRAW_TEXTURE_2D(normTex), coord).rgb, tbn, effectSettings.x);
-    vec3 sundiffuse = max(dot(-sunDir, normal), 0.0) * sunColor;
+    vec3 sundiffuse = mix(max(dot(-sunDir, normal), 0.0) * sunColor, v_lighting.rgb, effectSettings.w);
   #else
     vec3 sundiffuse = v_lighting.rgb;
   #endif