From e796bd0e697c7b9567a3264a4d743666f5df52a8 Mon Sep 17 00:00:00 2001
From: MihailRis <mexaruc@gmail.com>
Date: Fri, 17 Sep 2021 19:16:57 +0300
Subject: [PATCH] Improved fog quality

---
 res/main.glslf |  5 ++++-
 res/main.glslv | 10 ++++++----
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/res/main.glslf b/res/main.glslf
index 42e5d7ae..7528e68a 100644
--- a/res/main.glslf
+++ b/res/main.glslf
@@ -2,13 +2,16 @@
 
 in vec4 a_color;
 in vec2 a_texCoord;
+in float a_distance;
 out vec4 f_color;
 
 uniform sampler2D u_texture0;
+uniform vec3 u_fogColor;
 
 void main(){
 	vec4 tex_color = texture(u_texture0, a_texCoord);
 	if (tex_color.a < 0.5)
 		discard;
-	f_color = a_color * tex_color;
+	float depth = (a_distance/256.0)*(a_distance/256.0)*256.0;
+	f_color = mix(a_color * tex_color, vec4(u_fogColor,1.0), min(1.0, depth/256.0));
 }
diff --git a/res/main.glslv b/res/main.glslv
index 1e1cb98a..a0513030 100644
--- a/res/main.glslv
+++ b/res/main.glslv
@@ -6,17 +6,19 @@ layout (location = 2) in vec4 v_light;
 
 out vec4 a_color;
 out vec2 a_texCoord;
+out float a_distance;
 
 uniform mat4 u_model;
-uniform mat4 u_projview;
+uniform mat4 u_proj;
+uniform mat4 u_view;
 uniform vec3 u_skyLightColor;
 uniform float u_gamma;
 
 void main(){
-	vec4 position = u_projview * u_model * vec4(v_position, 1.0);
+	vec4 viewmodelpos = u_view * u_model * vec4(v_position, 1.0);
 	a_color = vec4(pow(v_light.rgb, vec3(u_gamma)),1.0f);
 	a_texCoord = v_texCoord;
 	a_color.rgb += u_skyLightColor * v_light.a*0.5;
-	a_color.rgb *= 1.0-position.z*0.0025;
-	gl_Position = position;
+	a_distance = length(viewmodelpos);
+	gl_Position = u_proj * viewmodelpos;
 }