refactor: scene deserialization organisation

src/scenes/material_def.rs

@@ -0,0 +1,27 @@
+use std::sync::Arc;
+
+use serde::Deserialize;
+
+use crate::objects::materials::{dielectric::Dielectric, lambertian::{Lambertian, Metal}, normal::Normal, traits::Material};
+
+
+#[derive(Deserialize)]
+#[serde(tag = "type", rename_all = "lowercase")]
+pub(crate) enum MaterialDef {
+    Lambertian(Lambertian),
+    Metal(Metal),
+    Dielectric(Dielectric),
+    Normal(Normal),
+}
+
+impl MaterialDef {
+    pub(crate) fn into_arc(self) -> Arc<dyn Material> {
+        match self {
+            MaterialDef::Lambertian(l) => Arc::new(l),
+            MaterialDef::Metal(m) => Arc::new(m),
+            MaterialDef::Dielectric(d) => Arc::new(d),
+            MaterialDef::Normal(n) => Arc::new(n),
+        }
+    }
+}
+