scenes and pbr cleanup to handle missing texture of param

1 files changed, 39 insertions, 0 deletions

diff --git a/bindgen/rust/src/lib.rs b/bindgen/rust/src/lib.rs
index f9e77b0..f3382a2 100644
--- a/bindgen/rust/src/lib.rs
+++ b/bindgen/rust/src/lib.rs
@@ -3,4 +3,43 @@
 #![warn(missing_docs)]
 #![cfg_attr(docsrs, feature(doc_cfg))]
 
+use std::{
+    fs::{self, File},
+    io::Write,
+    path::Path,
+};
+
 pub use celeritas_sys as ffi;
+use celeritas_sys::{DirectionalLight, PointLight, Vec3};
+use serde::{Deserialize, Serialize};
+
+/// Wrapper around a string that is the path to a gltf model **relative** to the configured
+/// `ASSETS` folder
+#[derive(Debug, Serialize, Deserialize)]
+pub struct ModelPath(String);
+
+/// Scene that can be saved and loaded from disk
+#[derive(Debug, Serialize, Deserialize)]
+pub struct SerializableScene {
+    pub sun: DirectionalLight,
+    pub point_lights: [Option<PointLight>; 4],
+    pub camera_orientation: (Vec3, Vec3),
+    pub models: Vec<ModelPath>,
+}
+
+// Runtime Scene <-> Serialized Scene
+
+impl SerializableScene {
+    /// TODO: docs
+    pub fn store_to_file(&self, filepath: &Path) {
+        let mut file = File::create(filepath).expect("creation failed");
+        let json = serde_json::to_string(&self).expect("serialize failed");
+        file.write(&json.as_bytes()).expect("writing failed");
+    }
+    /// TODO: docs
+    pub fn load_from_file(filepath: &Path) -> Self {
+        let contents = fs::read_to_string(filepath).expect("Filepath should be open and read-able");
+
+        serde_json::from_str(&contents).expect("Should be deserializable")
+    }
+}