cleanup

src/main.rs

@@ -159,15 +159,15 @@ fn three_balls_scene(aspect_ratio: f64) -> (Camera, HittableList) {
     let lookfrom = Point3::new(-2.0, 2.0, 1.0);
     let lookat = Point3::new(0.0, 0.0, -1.0);
     let vup = Vec3::new(0.0, 1.0, 0.0);
-    let dist_to_focus = 10.0; //(lookfrom - lookat).length_squared();
-    let vfov = 20.0;
+    let dist_to_focus = (lookfrom - lookat).length();
+    let focal_length_mm = 20.0;
     let defocus_angle = 0.0;
 
     let cam = Camera::new(
         lookfrom,
         lookat,
         vup,
-        vfov,
+        focal_length_mm,
         aspect_ratio,
         defocus_angle,
         dist_to_focus,
@@ -184,7 +184,6 @@ fn main() {
     let samples_per_pixel: i32 = 200;
     let max_depth: i32 = 10;
 
-    // Camera and World
     let (cam, world) = random_scene(aspect_ratio);
 
     let num_threads: usize = match available_parallelism() {
@@ -239,6 +238,3 @@ fn main() {
 
     img_buffer.save("render.png").unwrap();
 }
-
-// print!("\r{} %", progress);
-// let _ = stdout().flush();