defined camera in abstract sense

Pioneers.cabal

@@ -46,5 +46,6 @@ executable Pioneers
                    time >=1.4.0,
                    GLUtil >= 0.7,
                    attoparsec >= 0.11.2
+  other-modules:   Render.Types
   Default-Language: Haskell2010
 

shaders/map/fragment.shader

@@ -97,7 +97,7 @@ float snoise(vec3 v)
 float fog(float dist) {
     dist = max(0,dist - 50);
     dist = dist * 0.05;
-    dist = dist;
+//    dist = dist*dist;
     return 1-exp(-dist);
 }