Use a default white texture, srgb clear color

src/model/mod.rs

@@ -91,7 +91,7 @@ pub struct Model {
     pub materials: HashMap<String, Material>,
 
     /// Map associating the name of a texture and the real texture.
-    pub textures: HashMap<String, Option<SrgbTexture2d>>,
+    pub textures: HashMap<String, SrgbTexture2d>,
 
     /// The list of parts of the model.
     pub parts: Vec<Part>,
@@ -157,6 +157,7 @@ impl Model {
                 if let Some(id) = face.id {
                     face.id = Some(id + face_offset);
                 }
+                face.material_name = new_part.material_name.clone();
                 new_part.faces.push(face.clone());
                 self.faces.push(face.clone());
             }
@@ -167,6 +168,7 @@ impl Model {
         for (name, material) in other.materials {
             let entry = self.materials.entry(name);
             if let Entry::Occupied(_) = entry {
+                eprintln!("Warning: materials merged but sharing the same name");
                 // Return error
             } else {
                 entry.or_insert(material);
@@ -177,6 +179,7 @@ impl Model {
         for (name, texture) in other.textures {
             let entry = self.textures.entry(name);
             if let Entry::Occupied(_) = entry {
+                eprintln!("Warning: textures merged but sharing the same name");
                 // return Error;
             } else {
                 entry.or_insert(texture);
@@ -435,17 +438,17 @@ impl Model {
         if let Some(path) = material.textures.get("map_Kd") {
             let texture = renderer.make_texture(path);
             // Don't need to insert multiple times the same texture
-            self.textures.entry(path.to_owned()).or_insert(Some(texture));
+            self.textures.entry(path.to_owned()).or_insert(texture);
         };
     }
 
     /// Returns the rendering texture.
     pub fn get_texture_by_name(&self, name: &str) -> Option<&SrgbTexture2d> {
-        self.textures[name].as_ref()
+        self.textures.get(name)
     }
 
     /// Returns a ref mut to the table of textures.
-    pub fn textures_mut(&mut self) -> &mut HashMap<String, Option<SrgbTexture2d>> {
+    pub fn textures_mut(&mut self) -> &mut HashMap<String, SrgbTexture2d> {
         &mut self.textures
     }
 }