X-Git-Url: http://git.mutantstargoat.com?p=demo;a=blobdiff_plain;f=gl_shaders%2Fdefault.f.glsl;h=17d4353eb241868cbe85464b0ca02e7e044171e5;hp=490efabef796096809fbbc85c6079aaff90cc149;hb=f1c3197c3e035f4be0e10ff6a8d0cf0339824177;hpb=978140660bed8a4bbe782dc5ca0516a80e1ba233

diff --git a/gl_shaders/default.f.glsl b/gl_shaders/default.f.glsl
index 490efab..17d4353 100644
--- a/gl_shaders/default.f.glsl
+++ b/gl_shaders/default.f.glsl
@@ -11,11 +11,14 @@ varying vec3 normal;
 varying vec3 ldir;
 varying vec2 tex_coord;
 
+const float fog_density = 0.005;
+const vec4 sky_color = vec4(0.35, 0.5, 0.65, 1.0);
+
 out vec4 color;
 
 void main()
 {
-	vec3 p = normalize(pos);
+	vec3 p = normalize(pos); // view space dir
 	vec3 n = normalize(normal);
 	vec3 l = normalize(ldir);
 
@@ -25,7 +28,14 @@ void main()
 	float cdiff = max(dot(l, n), 0.0);
 	float cspec = pow(max(dot(r, vdir), 0.0), shininess);
 
+	float dist = -pos.z;
+	float fog = clamp(exp(-fog_density * dist), 0.0, 1.0);
+
 	vec4 texel = texture2D(tex, tex_coord);
-	color.xyz = diffuse.xyz * cdiff * texel.xyz + specular.xyz * cspec;
-	color.w = 1.0;
+
+	vec4 object_color;
+	object_color.xyz = diffuse.xyz * cdiff * texel.xyz + specular.xyz * cspec;
+	object_color.w = 1.0;
+
+	color = mix(sky_color, object_color, fog);
 }