Made silhouettes display correctly in the fog.

git-svn-id: http://svn.wildfiregames.com/public/ps/trunk@12862 3db68df2-c116-0410-a063-a993310a9797

binaries/data/mods/public/shaders/glsl/solid_player.fs

@@ -1,8 +1,26 @@
 #version 110
 
 uniform vec4 playerColor;
+uniform vec3 fogColor;
+uniform vec2 fogParams;
+
+vec3 get_fog(vec3 color)
+{
+	float density = fogParams.x;
+	float maxFog = fogParams.y;
+
+	const float LOG2 = 1.442695;
+	float z = gl_FragCoord.z / gl_FragCoord.w;
+	float fogFactor = exp2(-density * density * z * z * LOG2);
+
+	fogFactor = fogFactor * (1.0 - maxFog) + maxFog;
+
+	fogFactor = clamp(fogFactor, 0.0, 1.0);
+
+	return mix(fogColor, color, fogFactor);
+}
 
 void main()
 {
-  gl_FragColor = playerColor;
+	gl_FragColor = vec4(get_fog(playerColor.rgb),playerColor.a);
 }