Add fog

2 files changed, 10 insertions, 3 deletions

diff --git a/assets/shaders/fragment.glsl b/assets/shaders/fragment.glsl
index eca50d9..71435ef 100644
--- a/assets/shaders/fragment.glsl
+++ b/assets/shaders/fragment.glsl
@@ -2,9 +2,11 @@
 
 uniform sampler2D tex;
 uniform vec3 sun_direction;
+uniform vec3 sky_color;
 
 in vec3 surface_normal;
 in vec2 frag_tex_coord;
+in float depth;
 
 out vec4 color;
 
@@ -13,5 +15,5 @@ void main() {
     vec3 diffuse = vec3(max(brightness, 0.3));
 
     color = vec4(diffuse, 1.0) * texture(tex, frag_tex_coord);
-    // color = texture(tex, frag_tex_coord);
+    color = mix(vec4(sky_color, 1.0), color, 1 - depth);
 }
\ No newline at end of file
diff --git a/assets/shaders/vertex.glsl b/assets/shaders/vertex.glsl
index c59d6cd..3ca1055 100644
--- a/assets/shaders/vertex.glsl
+++ b/assets/shaders/vertex.glsl
@@ -10,10 +10,15 @@ layout (location = 2) in vec2 tex_coord;
 
 out vec2 frag_tex_coord;
 out vec3 surface_normal;
+out float depth;
 
 void main() {
-    gl_Position = projection_matrix * view_matrix * model_matrix * vec4(position, 1.0);
-    frag_tex_coord = tex_coord;
+    vec4 world_position = model_matrix * vec4(position, 1.0);
+    vec4 view_position = view_matrix * world_position;
+    vec4 clip_position = projection_matrix * view_position;
 
+    gl_Position = clip_position;
+    frag_tex_coord = tex_coord;
     surface_normal = (model_matrix * vec4(normal, 0.0)).xyz;
+    depth = clamp((length(view_position) - 75) / 125, 0.0, 1.0);
 }
\ No newline at end of file