X-Git-Url: http://git.mutantstargoat.com?p=demo;a=blobdiff_plain;f=gl_shaders%2Fdefault.f.glsl;h=88f0d69fe4029be18689f2235a736b2a4da35cdc;hp=98cf032592d0457f40b977eebe4bfead9e4b0fda;hb=c99060df01719b24ebd793b149d3c2dc5748cad5;hpb=243eb502c5dc70e586a9e81815234069bf623480

diff --git a/gl_shaders/default.f.glsl b/gl_shaders/default.f.glsl
index 98cf032..88f0d69 100644
--- a/gl_shaders/default.f.glsl
+++ b/gl_shaders/default.f.glsl
@@ -11,11 +11,15 @@ varying vec3 normal;
 varying vec3 ldir;
 varying vec2 tex_coord;
 
+// const float fog_density = 0.005;
+uniform float fog_density;
+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);
 
@@ -25,8 +29,14 @@ 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.xyz = diffuse.xyz * cdiff + 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);
 }