Allow for scene to be selected via command line args

Author: sdfgeoff

Makefile

@@ -5,6 +5,7 @@ assets:
 	rm -r assets || true
 	blender -b test_scenes/Cube.blend --python export.py -- --output-file="assets/scenes/Cube.scn" --log-level=DEBUG
 	blender -b test_scenes/PhysicsTest.blend --python export.py -- --output-file="assets/scenes/PhysicsTest.scn" --log-level=DEBUG
+	blender -b test_scenes/Heirarchy.blend --python export.py -- --output-file="assets/scenes/Heirarchy.scn" --log-level=DEBUG
 
 run:
-	cargo run --example scenes
+	cargo run --example scenes -- scenes/PhysicsTest.scn

examples/scenes/main.rs

@@ -3,6 +3,7 @@ use bevy::prelude::*;
 use bevy_rapier3d::physics::{NoUserData, RapierPhysicsPlugin};
 use bevy_rapier3d::prelude::*;
 use blender_bevy_toolkit::BlendLoadPlugin;
+use std::env;
 
 
 fn spawn_scene(
@@ -25,7 +26,16 @@ fn spawn_scene(
         ..Default::default()
     });
 
-    let scene_handle: Handle<DynamicScene> = asset_server.load("scenes/PhysicsTest.scn");
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() != 2 {
+        println!("Please specify a scene file to load. For example:\n cargo run --example scenes -- scenes/Heirarchy.scn");
+        std::process::exit(1);
+    }
+
+    println!("Running scene: {}", args[1]);
+
+    let scene_handle: Handle<DynamicScene> = asset_server.load(args[1].as_str());
     scene_spawner.spawn_dynamic(scene_handle);
 }
 
@@ -37,8 +47,6 @@ fn setup_physics(mut physics_config: ResMut<RapierConfiguration>) {
 
 
 fn main() {
-    println!("Running example scenes");
-    
     App::new()
         .add_plugins(DefaultPlugins)
         .add_plugin(RapierPhysicsPlugin::<NoUserData>::default())