fx: json files

src/main.rs

@@ -7,7 +7,7 @@ mod raytracer;
 mod scenes;
 mod vec3;
 
-use std::fs;
+use std::{env, fs};
 use std::sync::Arc;
 
 use crate::camera::Camera;
@@ -27,8 +27,13 @@ fn main() {
     dotenv().ok();
     pretty_env_logger::init();
 
-    // TODO: use cli arg for scenefile
-    let json_file = "./scenes/scene.json";
+    // TODO: better cli parsing
+    let mut json_file = "./scenes/scene.json";
+    let args: Vec<String> = env::args().collect();
+    if args.len() > 1 {
+        json_file = &args[1];
+    }
+
     let json_str = fs::read_to_string(json_file).expect("Reading specified scene file failed!");
     let mut scene: Scene = serde_json::from_str(&json_str).unwrap();
     render(&mut scene);