fixed issues in shaders

[demo] / gl_shaders / morphing.f.glsl

diff --git a/gl_shaders/morphing.f.glsl b/gl_shaders/morphing.f.glsl
index 490efab..df74c90 100644 (file)
--- a/gl_shaders/morphing.f.glsl
+++ b/gl_shaders/morphing.f.glsl
@@ -6,6 +6,9 @@ uniform vec4 diffuse;
 uniform vec4 specular;
 uniform float shininess;
 
+uniform float fog_density;
+const vec3 sky_color = vec3(0.35, 0.5, 0.65);
+
 varying vec3 pos;
 varying vec3 normal;
 varying vec3 ldir;
@@ -26,6 +29,11 @@ void main()
        float cspec = pow(max(dot(r, vdir), 0.0), shininess);
 
        vec4 texel = texture2D(tex, tex_coord);
-       color.xyz = diffuse.xyz * cdiff * texel.xyz + specular.xyz * cspec;
+       vec3 object_color = diffuse.xyz * cdiff * texel.xyz + specular.xyz * cspec;
+
+       float dist = -pos.z;
+       float fog = clamp(exp(-fog_density * dist), 0.0, 1.0);
+
+       color.xyz = mix(sky_color, object_color, fog);
        color.w = 1.0;
 }