tweaked Scene::calculateLightContribution() and scenes/cyls.fart slightly

git-svn-id: svn://anubis/fart/trunk@189 7f9b0f55-74a9-4bce-be96-3c2cd072584d

scenes/cyls.fart

@@ -10,14 +10,14 @@ scene
 
     camera
     {
-        position <1.5, -1.0, 1.2>
+        position <1.0, -2, 1.2>
         look_at <0, 0, 0.4>
         up <0, 0, 1>
     }
 
     light
     {
-        position <3, -8, 5>
+        position <10, 0, 10>
     }
 
     define material cyan
@@ -66,7 +66,7 @@ scene
             size <0.2, 0, 0.3>
             rotate 180, <1, 0, 0>
             translate <0, 0, 0.3>
-            material cyan 
+            material cyan
         }
         cyl {
             size <0.2, 0, 0.3>