Initial camera camera repositioning

ray-tracing-tev/src/main.rs

@@ -99,11 +99,11 @@ fn main() {
         let f = map.get(scene).unwrap();
         let e = f();
 
-        let c = BasicCamera::new(
+        let c = BasicCamera::from_look_at(
             args.width,
             args.height,
             e.camera_pos,
-            e.camera_dir,
+            e.camera_look_at,
             e.camera_up,
             e.horizontal_fov,
         );