ft: deserialization

scenes/failsMatBounds.json

@@ -0,0 +1,22 @@
+{
+  "camera": { 
+    "image_width": 1920,
+    "image_height": 1080,
+    "anti_alias_rate": 1,
+    "max_depth": 10,
+    "fov": 90.0,
+    "look_from": { "x": -10, "y": 5, "z": 10 },
+    "look_at": { "x": 0.0, "y": 0.0, "z": -1.0 }, 
+    "vup": { "x": 0.0, "y": 1.0, "z": 0.0 }
+  },
+  "materials": [
+    { "type": "metal", "albedo": { "x": 0.2, "y": 0.4, "z": 0.8 }, "prob": 1.0, "fuzz": 0.1 }
+
+  ],
+  "objects": [
+    { "type": "sphere", "center": { "x": 0, "y": 0.7, "z": -0.4 }, "radius": 0.2, "material": 1}
+  ]
+}
+
+
+

scenes/scene.json

@@ -2,10 +2,10 @@
   "camera": { 
     "image_width": 1920,
     "image_height": 1080,
-    "anti_alias_rate": 3,
-    "max_depth": 50,
-    "fov": 90.0,
-    "look_from": { "x": 0, "y": 0, "z": 0 },
+    "anti_alias_rate": 23,
+    "max_depth": 100,
+    "fov": 40.0,
+    "look_from": { "x": -10, "y": 5, "z": 10 },
     "look_at": { "x": 0.0, "y": 0.0, "z": -1.0 }, 
     "vup": { "x": 0.0, "y": 1.0, "z": 0.0 }
   },
@@ -25,7 +25,8 @@
     { "type": "sphere", "center": { "x": 0.0, "y": -100.5, "z": -1.0 }, "radius": 100.0, "material": 2},
     { "type": "sphere", "center": { "x": 0.0, "y": 0.0, "z": -1.2 }, "radius": 0.5, "material": 3},
     { "type": "sphere", "center": { "x": -1, "y": 0, "z": -1 }, "radius": 0.4, "material": 5},
-    { "type": "sphere", "center": { "x": 1, "y": 0, "z": -1 }, "radius": 0.5, "material": 6}
+    { "type": "sphere", "center": { "x": 1, "y": 0, "z": -1 }, "radius": 0.5, "material": 6},
+    { "type": "sphere", "center": { "x": 20, "y": 7, "z": -15 }, "radius": 10.5, "material": 0}
   ]
 }
 

src/main.rs

@@ -72,14 +72,15 @@ fn random_sphere_on_floor<T: Hittable>(
     sphere
 }
 
-// FIXME: bunch of unwraps/expects in deserialization code
 // TODO: implement scene serialization
 fn main() {
     dotenv().ok();
     pretty_env_logger::init();
 
     // TODO: use cli arg for scenefile
-    let json_str = fs::read_to_string("./scenes/scene.json").expect("waddehell!");
+    let json_file = "./scenes/scenes.json";
+    // let json_file = "./scenes/failsMatBounds.json";
+    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();
     scene.render();
 

src/scenes/raw_camera.rs

@@ -41,11 +41,9 @@ impl Default for RawCamera {
     }
 }
 
-impl TryFrom<RawCamera> for Camera {
-    type Error = String;
-
-    fn try_from(raw: RawCamera) -> Result<Self, Self::Error> {
-        let c = Camera::new_full(
+impl From<RawCamera> for Camera {
+    fn from(raw: RawCamera) -> Self {
+        Camera::new_full(
             raw.image_width,
             raw.image_height,
             raw.anti_alias_rate,
@@ -54,8 +52,6 @@ impl TryFrom<RawCamera> for Camera {
             raw.look_from,
             raw.look_at,
             raw.vup,
-        );
-
-        Ok(c)
+        )
     }
 }

src/scenes/scene.rs

@@ -1,8 +1,6 @@
-use std::{
-    fmt::{self, Debug},
-    sync::Arc,
-};
+use std::sync::Arc;
 
+use log::warn;
 use serde::Deserialize;
 
 use crate::{
@@ -53,10 +51,10 @@ impl<'de> Deserialize<'de> for Scene {
         let objs: Vec<Arc<dyn Hittable>> = conc
             .objects
             .into_iter()
-            .map(|h| h.into_arc(&mats))
+            .filter_map(|h| h.into_arc(&mats))
             .collect();
         Ok(Self {
-            camera: Camera::try_from(conc.camera).unwrap(),
+            camera: Camera::from(conc.camera),
             materials: mats,
             objects: objs,
         })
@@ -77,13 +75,23 @@ enum HittableDef {
 }
 
 impl HittableDef {
-    fn into_arc(self, materials: &Vec<Arc<dyn Material>>) -> Arc<dyn Hittable> {
+    fn into_arc(self, materials: &Vec<Arc<dyn Material>>) -> Option<Arc<dyn Hittable>> {
+        // THOUGHT: i think this can be done better; in the map/filter call up there?
         match self {
-            HittableDef::Sphere(s) => Arc::new(Sphere::new(
+            HittableDef::Sphere(s) => {
+                if s.material as usize >= materials.len() {
+                    warn!(
+                        "Sphere specified nonexistent material {}; skipping...",
+                        s.material
+                    );
+                    return None;
+                }
+                Some(Arc::new(Sphere::new(
                     s.center,
                     s.radius,
                     materials.get(s.material as usize).unwrap().clone(),
-            )),
+                )))
+            }
         }
     }
 }