feat: additional implementation of renderer

src/app.rs

@@ -1,4 +1,9 @@
+use crate::common::camera::{Camera, CameraResources};
+use crate::common::instance::InstanceRegistry;
 use crate::common::mesh::MeshRegistry;
+use crate::common::render_batch::RenderBatch;
+use crate::common::scene::Scene;
+use crate::gpu::instance::GpuInstance;
 use crate::gpu::vertex3::Vertex3;
 use crate::triangle;
 use std::error::Error;
@@ -15,35 +20,33 @@ use vulkano::device::physical::{PhysicalDevice, PhysicalDeviceType};
 use vulkano::device::{
     Device, DeviceCreateInfo, DeviceExtensions, Queue, QueueCreateInfo, QueueFlags,
 };
+use vulkano::format::Format;
 use vulkano::image::view::ImageView;
 use vulkano::image::{Image, ImageCreateInfo, ImageType, ImageUsage};
 use vulkano::instance::{Instance, InstanceCreateFlags, InstanceCreateInfo, InstanceExtensions};
 use vulkano::memory::allocator::{AllocationCreateInfo, MemoryAllocator, StandardMemoryAllocator};
 use vulkano::pipeline::graphics::GraphicsPipelineCreateInfo;
 use vulkano::pipeline::graphics::color_blend::{ColorBlendAttachmentState, ColorBlendState};
+use vulkano::pipeline::graphics::depth_stencil::{DepthState, DepthStencilState};
 use vulkano::pipeline::graphics::input_assembly::InputAssemblyState;
 use vulkano::pipeline::graphics::multisample::MultisampleState;
 use vulkano::pipeline::graphics::rasterization::RasterizationState;
 use vulkano::pipeline::graphics::vertex_input::{Vertex, VertexDefinition};
 use vulkano::pipeline::graphics::viewport::{Viewport, ViewportState};
 use vulkano::pipeline::layout::PipelineDescriptorSetLayoutCreateInfo;
-use vulkano::pipeline::{DynamicState, GraphicsPipeline, Pipeline, PipelineBindPoint, PipelineLayout, PipelineShaderStageCreateInfo};
+use vulkano::pipeline::{
+    DynamicState, GraphicsPipeline, Pipeline, PipelineBindPoint, PipelineLayout,
+    PipelineShaderStageCreateInfo,
+};
 use vulkano::render_pass::{Framebuffer, FramebufferCreateInfo, RenderPass, Subpass};
 use vulkano::shader::ShaderModule;
 use vulkano::swapchain::{Surface, Swapchain, SwapchainCreateInfo, SwapchainPresentInfo};
 use vulkano::sync::GpuFuture;
 use vulkano::{Validated, VulkanError, VulkanLibrary, swapchain, sync};
-use vulkano::format::Format;
-use vulkano::pipeline::graphics::depth_stencil::{DepthState, DepthStencilState};
 use winit::application::ApplicationHandler;
 use winit::event::WindowEvent;
 use winit::event_loop::ActiveEventLoop;
 use winit::window::{Window, WindowAttributes, WindowId};
-use crate::common::camera::{Camera, CameraResources};
-use crate::common::instance::InstanceRegistry;
-use crate::common::render_batch::RenderBatch;
-use crate::common::scene::Scene;
-use crate::gpu::instance::GpuInstance;
 
 struct VulkanContext {
     window: Arc<Window>,
@@ -165,23 +168,14 @@ impl VulkanContext {
         let frag_shader = triangle::load_fragment(device.clone())
             .map_err(|e| format!("Failed to load fragment shader: {e}"))?;
 
-        let framebuffers = Self::create_framebuffers(
-            mem_allocator.clone(),
-            &images,
-            &render_pass
-        )?;
+        let framebuffers = Self::create_framebuffers(mem_allocator.clone(), &images, &render_pass)?;
 
         let image_extents = swapchain.image_extent();
 
         // Create the camera.
         let camera = Camera::new(image_extents);
 
-        let pipeline = Self::create_pipeline(
-            &device,
-            &vert_shader,
-            &frag_shader,
-            &render_pass,
-        )?;
+        let pipeline = Self::create_pipeline(&device, &vert_shader, &frag_shader, &render_pass)?;
 
         // Get descriptor set layout
         let pipeline_layout = pipeline.layout().clone();
@@ -191,17 +185,12 @@ impl VulkanContext {
         let camera_resources = CameraResources::new(
             mem_allocator.clone(),
             desc_allocator.clone(),
-            desc_set_layout
+            desc_set_layout,
         );
 
         let scene = Scene::from_file_json("./test_scene.scene");
-        let mesh_registry = Arc::new(MeshRegistry::from_scene(
-            &scene,
-            mem_allocator.clone()
-        ));
-        let instance_registry = Arc::new(InstanceRegistry::from_scene(
-            &scene
-        ));
+        let mesh_registry = Arc::new(MeshRegistry::from_scene(&scene, mem_allocator.clone()));
+        let instance_registry = Arc::new(InstanceRegistry::from_scene(&scene));
 
         Ok(Self {
             window,
@@ -220,7 +209,7 @@ impl VulkanContext {
             mesh_registry,
             instance_registry,
             camera,
-            camera_resources
+            camera_resources,
         })
     }
 
@@ -260,16 +249,13 @@ impl VulkanContext {
             RenderBatch::build_batches(
                 self.mem_allocator.clone(),
                 self.mesh_registry.clone(),
-                self.instance_registry.clone()
-            )
+                self.instance_registry.clone(),
+            ),
         )?;
 
         let future = sync::now(self.device.clone())
             .join(acquire_future)
-            .then_execute(
-                self.queue.clone(),
-                cmd_buffer.clone(),
-            )?
+            .then_execute(self.queue.clone(), cmd_buffer.clone())?
             .then_swapchain_present(
                 self.queue.clone(),
                 SwapchainPresentInfo::swapchain_image_index(self.swapchain.clone(), image_idx),
@@ -339,8 +325,7 @@ impl VulkanContext {
         images: &Vec<Arc<Image>>,
         render_pass: &Arc<RenderPass>,
     ) -> Result<Vec<Arc<Framebuffer>>, Box<dyn Error>> {
-        let depth_buffer = ImageView::new_default(
-            Image::new(
+        let depth_buffer = ImageView::new_default(Image::new(
             alloc.clone(),
             ImageCreateInfo {
                 image_type: ImageType::Dim2d,
@@ -349,9 +334,8 @@ impl VulkanContext {
                 usage: ImageUsage::DEPTH_STENCIL_ATTACHMENT | ImageUsage::TRANSIENT_ATTACHMENT,
                 ..Default::default()
             },
-                AllocationCreateInfo::default()
-            )?
-        )?;
+            AllocationCreateInfo::default(),
+        )?)?;
 
         let framebuffers = images
             .iter()
@@ -388,8 +372,8 @@ impl VulkanContext {
             .entry_point("main")
             .ok_or("Failed to find fragment shader entry point")?;
 
-        let vertex_input_state = [Vertex3::per_vertex(), GpuInstance::per_instance()]
-            .definition(&vs)?;
+        let vertex_input_state =
+            [Vertex3::per_vertex(), GpuInstance::per_instance()].definition(&vs)?;
 
         let stages = vec![
             PipelineShaderStageCreateInfo::new(vs),
@@ -458,10 +442,7 @@ impl VulkanContext {
         builder
             .begin_render_pass(
                 RenderPassBeginInfo {
-                    clear_values: vec![
-                        Some([0.1, 0.1, 0.1, 0.5].into()),
-                        Some(1f32.into()),
-                    ],
+                    clear_values: vec![Some([0.1, 0.1, 0.1, 0.5].into()), Some(1f32.into())],
                     ..RenderPassBeginInfo::framebuffer(framebuffer.clone())
                 },
                 SubpassBeginInfo {
@@ -469,10 +450,7 @@ impl VulkanContext {
                     ..Default::default()
                 },
             )?
-            .set_viewport(
-                0,
-                [camera.viewport()].into_iter().collect()
-            )?
+            .set_viewport(0, [camera.viewport()].into_iter().collect())?
             .bind_descriptor_sets(
                 PipelineBindPoint::Graphics,
                 pipeline.layout().clone(),
@@ -486,13 +464,20 @@ impl VulkanContext {
         unsafe {
             render_batches.iter().for_each(|batch| {
                 // Grab mesh information
-                let mesh = mesh_registry.get(&batch.mesh_id)
+                let mesh = mesh_registry
+                    .get(&batch.mesh_id)
                     .expect("Mesh does not exist in registry");
 
                 builder
                     .bind_vertex_buffers(1, batch.instance_buffer.clone())
                     .unwrap()
-                    .draw_indexed(mesh.index_count as u32, batch.instance_count, mesh.index_loc as u32, mesh.vertex_loc as i32, 0)
+                    .draw_indexed(
+                        mesh.index_count as u32,
+                        batch.instance_count,
+                        mesh.index_loc as u32,
+                        mesh.vertex_loc as i32,
+                        0,
+                    )
                     .unwrap();
             });
         }
@@ -524,11 +509,10 @@ impl VulkanContext {
         self.swapchain_images = new_images;
 
         // Recreate the framebuffers, which depend on the swapchain.
-        let new_framebuffers =
-            Self::create_framebuffers(
+        let new_framebuffers = Self::create_framebuffers(
             self.mem_allocator.clone(),
             &self.swapchain_images,
-                &self.render_pass
+            &self.render_pass,
         )?;
 
         self.framebuffers = new_framebuffers;
@@ -541,7 +525,8 @@ impl VulkanContext {
                 &self.render_pass,
             )?;
 
-            self.camera.extents([image_extents.width, image_extents.height]);
+            self.camera
+                .extents([image_extents.width, image_extents.height]);
 
             self.pipeline = new_pipeline;
         }

src/common/camera.rs

@@ -1,13 +1,13 @@
+use crate::gpu::camera::CameraUniform;
+use nalgebra::{Matrix4, Point3, Vector2, Vector3};
 use std::f32::consts::PI;
 use std::sync::Arc;
-use nalgebra::{Matrix4, Point3, Vector2, Vector3};
 use vulkano::buffer::{Buffer, BufferCreateInfo, BufferUsage, Subbuffer};
 use vulkano::descriptor_set::allocator::DescriptorSetAllocator;
-use vulkano::descriptor_set::{DescriptorSet, WriteDescriptorSet};
 use vulkano::descriptor_set::layout::DescriptorSetLayout;
+use vulkano::descriptor_set::{DescriptorSet, WriteDescriptorSet};
 use vulkano::memory::allocator::{AllocationCreateInfo, MemoryAllocator, MemoryTypeFilter};
 use vulkano::pipeline::graphics::viewport::Viewport;
-use crate::gpu::camera::CameraUniform;
 
 /// A camera set within 3D space.
 pub struct Camera {
@@ -28,9 +28,7 @@ pub struct Camera {
 impl Camera {
     /// Creates a new camera. This default camera is positioned at (1, 1, 1) and is looking at
     /// (0, 0, 0), and a default FOV of 70 degrees.
-    pub fn new(
-        extents: impl Into<Vector2<u32>>
-    ) -> Self {
+    pub fn new(extents: impl Into<Vector2<u32>>) -> Self {
         let extents = extents.into();
         let position = Vector3::new(-7.0, 7.0, -7.0);
         let target = Vector3::zeros();
@@ -84,7 +82,7 @@ impl Camera {
         Matrix4::look_at_rh(
             &Point3::from(self.position),
             &Point3::from(self.forward - self.position),
-            &self.up
+            &self.up,
         )
     }
 
@@ -92,12 +90,7 @@ impl Camera {
     pub fn get_projection(&self) -> Matrix4<f32> {
         let aspect = self.extents.x as f32 / self.extents.y as f32;
 
-        let mut proj = Matrix4::new_perspective(
-            aspect,
-            self.fov,
-            1.0,
-            10000.0
-        );
+        let mut proj = Matrix4::new_perspective(aspect, self.fov, 1.0, 10000.0);
 
         // Flip the y-axis, since Vulkan uses a different coordinate system.
         proj[(1, 1)] *= -1.0;
@@ -133,30 +126,34 @@ impl CameraResources {
         desc_layout: Arc<DescriptorSetLayout>,
     ) -> Arc<Self> {
         // Allocate the buffer
-        let buffer = Arc::new(Buffer::new_sized::<CameraUniform>(
+        let buffer = Arc::new(
+            Buffer::new_sized::<CameraUniform>(
                 alloc.clone(),
                 BufferCreateInfo {
                     usage: BufferUsage::UNIFORM_BUFFER,
                     ..Default::default()
                 },
                 AllocationCreateInfo {
-                memory_type_filter: MemoryTypeFilter::PREFER_HOST |
-                    MemoryTypeFilter::HOST_SEQUENTIAL_WRITE,
+                    memory_type_filter: MemoryTypeFilter::PREFER_HOST
+                        | MemoryTypeFilter::HOST_SEQUENTIAL_WRITE,
                     ..Default::default()
-            }
-        ).expect("Couldn't allocate the camera uniform buffer"));
+                },
+            )
+            .expect("Couldn't allocate the camera uniform buffer"),
+        );
 
         // Create the descriptor set
         let descriptor_set = DescriptorSet::new(
             desc_alloc.clone(),
             desc_layout,
             [WriteDescriptorSet::buffer(0, buffer.as_ref().clone())],
-            []
-        ).expect("Couldn't create camera descriptor set");
+            [],
+        )
+        .expect("Couldn't create camera descriptor set");
 
         Arc::new(Self {
             buffer,
-            descriptor_set
+            descriptor_set,
         })
     }
 
@@ -166,8 +163,7 @@ impl CameraResources {
         let view = camera.get_view();
         let proj = camera.get_projection();
 
-        let mut buffer_data = self.buffer.write()
-            .unwrap();
+        let mut buffer_data = self.buffer.write().unwrap();
         buffer_data.proj = proj.into();
         buffer_data.view = view.into();
     }

src/common/instance.rs

@@ -1,6 +1,6 @@
-use std::collections::HashMap;
 use crate::common::scene::{Scene, SceneInstance};
 use nalgebra::{Matrix4, Vector3, Vector4};
+use std::collections::HashMap;
 
 /// Contains all information about an instance of a mesh, specifically its translation, rotation,
 /// and scale. Note that the rotation is a [`Vector4`], and not a `Quaternion`.
@@ -44,7 +44,13 @@ impl From<SceneInstance> for MeshInstance {
 }
 
 impl From<&SceneInstance> for MeshInstance {
-    fn from(SceneInstance { translation, rotation, scale }: &SceneInstance) -> Self {
+    fn from(
+        SceneInstance {
+            translation,
+            rotation,
+            scale,
+        }: &SceneInstance,
+    ) -> Self {
         Self {
             translation: Vector3::from(*translation).to_homogeneous(),
             rotation: Vector3::from(*rotation).to_homogeneous(),
@@ -61,7 +67,10 @@ pub struct InstanceRegistry {
 impl InstanceRegistry {
     pub fn from_scene(scene: &Scene) -> Self {
         // Read information about the instances from the scene.
-        let instances: HashMap<String, Vec<MeshInstance>> = scene.instances.iter()
+        let instances: HashMap<String, Vec<MeshInstance>> =
+            scene
+                .instances
+                .iter()
                 .fold(HashMap::new(), |mut map, (mesh_id, instance)| {
                     map.entry(mesh_id.clone())
                         .and_modify(|v| v.push(instance.into()))
@@ -69,9 +78,7 @@ impl InstanceRegistry {
                     map
                 });
 
-        Self {
-            instances
-        }
+        Self { instances }
     }
 
     pub fn get_instances_for(&self, mesh_id: &String) -> Vec<MeshInstance> {

src/common/material.rs

@@ -1,13 +1,13 @@
 use std::collections::HashMap;
 
 pub struct MaterialRegistry {
-    materials: HashMap<String, Material>
+    materials: HashMap<String, Material>,
 }
 
 impl MaterialRegistry {
     pub fn new() -> Self {
         Self {
-            materials: HashMap::new()
+            materials: HashMap::new(),
         }
     }
 

src/common/mesh.rs

@@ -1,11 +1,11 @@
 use crate::common::scene::Scene;
 use crate::gpu::vertex3::Vertex3;
+use crate::loaders::mesh_loader::{MeshInfo, MeshLoader};
 use std::collections::HashMap;
 use std::sync::Arc;
 use vulkano::buffer::{Buffer, BufferCreateInfo, BufferUsage, Subbuffer};
 use vulkano::memory::allocator::{AllocationCreateInfo, MemoryAllocator, MemoryTypeFilter};
 use wavefront::Obj;
-use crate::loaders::mesh_loader::{MeshInfo, MeshLoader};
 
 /// This struct is slightly misleading - it doesn't actually contain the mesh information, but
 /// the locations of the mesh's information in the overall application's vertex buffer, index buffer,
@@ -56,7 +56,9 @@ impl MeshRegistry {
             .map(|(id, path)| {
                 (
                     id.clone(),
-                    mesh_loader.load_mesh(path).expect("Couldn't read wavefront file"),
+                    mesh_loader
+                        .load_mesh(path)
+                        .expect("Couldn't read wavefront file"),
                 )
             })
             .collect::<HashMap<String, MeshInfo>>();
@@ -71,7 +73,9 @@ impl MeshRegistry {
             let all_verts = obj.vertices;
             let all_norms = obj.normals;
             let obj_num_verts = all_verts.len();
-            all_verts.iter().zip(all_norms.iter())
+            all_verts
+                .iter()
+                .zip(all_norms.iter())
                 .zip(obj.uvs.iter())
                 .for_each(|((pos, norm), uv)| {
                     buf_verts.push(Vertex3::new(*pos, *norm, *uv));
@@ -81,7 +85,10 @@ impl MeshRegistry {
             let obj_num_idx = obj.indices.len();
             buf_indices.extend(obj.indices);
 
-            println!("Loaded mesh \"{}\" with {} vertices and {} indices", id, obj_num_verts, obj_num_idx);
+            println!(
+                "Loaded mesh \"{}\" with {} vertices and {} indices",
+                id, obj_num_verts, obj_num_idx
+            );
 
             // TODO Create bounding boxes for each mesh and associate them with the struct.
             mesh_list.insert(

src/common/mod.rs

@@ -1,6 +1,6 @@
-pub mod instance;
-pub mod mesh;
-pub mod scene;
-pub mod render_batch;
 pub mod camera;
+pub mod instance;
 mod material;
+pub mod mesh;
+pub mod render_batch;
+pub mod scene;

src/common/render_batch.rs

@@ -1,9 +1,9 @@
-use std::sync::Arc;
-use vulkano::buffer::{Buffer, BufferCreateInfo, BufferUsage, Subbuffer};
-use vulkano::memory::allocator::{AllocationCreateInfo, MemoryAllocator, MemoryTypeFilter};
 use crate::common::instance::InstanceRegistry;
 use crate::common::mesh::MeshRegistry;
 use crate::gpu::instance::GpuInstance;
+use std::sync::Arc;
+use vulkano::buffer::{Buffer, BufferCreateInfo, BufferUsage, Subbuffer};
+use vulkano::memory::allocator::{AllocationCreateInfo, MemoryAllocator, MemoryTypeFilter};
 
 #[derive(Debug, Clone)]
 pub struct RenderBatch {
@@ -18,9 +18,11 @@ impl RenderBatch {
     pub fn build_batches(
         allocator: Arc<dyn MemoryAllocator>,
         mesh_registry: Arc<MeshRegistry>,
-        instance_registry: Arc<InstanceRegistry>
+        instance_registry: Arc<InstanceRegistry>,
     ) -> Vec<Self> {
-        mesh_registry.meshes.iter()
+        mesh_registry
+            .meshes
+            .iter()
             .filter_map(|(id, mesh)| {
                 let instances = instance_registry.get_instances_for(id);
 
@@ -29,11 +31,10 @@ impl RenderBatch {
                     return None;
                 }
 
-                let gpu_instances = instances.iter()
+                let gpu_instances = instances
+                    .iter()
                     .cloned()
-                    .map(|instance| {
-                        instance.into()
-                    })
+                    .map(|instance| instance.into())
                     .collect::<Vec<GpuInstance>>();
 
                 // Build instances into a RenderBatch
@@ -44,18 +45,20 @@ impl RenderBatch {
                         ..Default::default()
                     },
                     AllocationCreateInfo {
-                        memory_type_filter: MemoryTypeFilter::PREFER_DEVICE |
-                            MemoryTypeFilter::HOST_SEQUENTIAL_WRITE,
+                        memory_type_filter: MemoryTypeFilter::PREFER_DEVICE
+                            | MemoryTypeFilter::HOST_SEQUENTIAL_WRITE,
                         ..Default::default()
                     },
-                    gpu_instances
-                ).expect("Couldn't allocate instance buffer");
+                    gpu_instances,
+                )
+                .expect("Couldn't allocate instance buffer");
 
                 Some(Self {
                     mesh_id: id.clone(),
                     instance_buffer,
                     instance_count: instances.len() as u32,
                 })
-            }).collect()
+            })
+            .collect()
     }
 }

src/common/scene.rs

@@ -89,24 +89,23 @@ pub struct SceneInstance {
 
 #[cfg(test)]
 pub mod create_files {
+    pub use super::*;
     use std::error::Error;
     use std::io::Write;
-    pub use super::*;
 
     #[test]
     pub fn create_test_scene() -> Result<(), Box<dyn Error>> {
         let scene = Scene {
             name: "Testing Scene".to_string(),
-            mesh_paths: HashMap::from([
-                ("venator".to_string(), "Venator.obj".to_string())
-            ]),
-            instances: HashMap::from([
-                ("venator".to_string(), SceneInstance {
+            mesh_paths: HashMap::from([("venator".to_string(), "Venator.obj".to_string())]),
+            instances: HashMap::from([(
+                "venator".to_string(),
+                SceneInstance {
                     translation: [0.0, 0.0, 0.0],
                     rotation: [0.0, 0.0, 0.0],
-                    scale: [1.0, 1.0, 1.0]
-                })
-            ])
+                    scale: [1.0, 1.0, 1.0],
+                },
+            )]),
         };
 
         let json = serde_json::to_string_pretty(&scene)?;

src/gpu/camera.rs

@@ -1,5 +1,5 @@
-use vulkano::buffer::BufferContents;
 use crate::common::camera::Camera;
+use vulkano::buffer::BufferContents;
 
 #[derive(BufferContents)]
 #[repr(C)]

src/gpu/mod.rs

@@ -1,3 +1,3 @@
+pub mod camera;
 pub mod instance;
 pub mod vertex3;
-pub mod camera;

src/gpu/vertex3.rs

@@ -13,15 +13,11 @@ pub struct Vertex3 {
 }
 
 impl Vertex3 {
-    pub fn new(
-        position: [f32; 3],
-        normal: [f32; 3],
-        uv: [f32; 3],
-    ) -> Self {
+    pub fn new(position: [f32; 3], normal: [f32; 3], uv: [f32; 3]) -> Self {
         Self {
             position,
             normal,
-            uv
+            uv,
         }
     }
 }

src/loaders/gltf_loader.rs

@@ -1,6 +1,6 @@
-use std::path::Path;
-use anyhow::Result;
 use crate::loaders::mesh_loader::{MeshFileLoader, MeshInfo};
+use anyhow::Result;
+use std::path::Path;
 
 pub struct GltfLoader;
 
@@ -51,7 +51,7 @@ impl MeshFileLoader for GltfLoader {
             vertices,
             indices,
             normals,
-            uvs
+            uvs,
         })
     }
 }

src/loaders/mesh_loader.rs

@@ -1,9 +1,9 @@
+use super::gltf_loader::*;
+use crate::loaders::obj_loader::ObjLoader;
+use anyhow::Result;
 use std::collections::HashMap;
 use std::path::Path;
-use anyhow::Result;
 use thiserror::Error;
-use crate::loaders::obj_loader::ObjLoader;
-use super::gltf_loader::*;
 
 pub struct MeshInfo {
     /// The mesh's vertices.
@@ -21,7 +21,7 @@ pub trait MeshFileLoader {
 }
 
 pub struct MeshLoader {
-    loaders: HashMap<String, Box<dyn MeshFileLoader>>
+    loaders: HashMap<String, Box<dyn MeshFileLoader>>,
 }
 
 #[derive(Error, Debug)]
@@ -29,29 +29,37 @@ pub enum MeshLoaderError {
     #[error("file extension is missing")]
     MissingExtension,
     #[error("extension {0} is not supported")]
-    ExtensionNotSupported(String)
+    ExtensionNotSupported(String),
 }
 
 impl MeshLoader {
     pub fn new() -> Self {
         let mut loaders = HashMap::new();
-        loaders.insert("gltf".into(), Box::new(GltfLoader) as Box<dyn MeshFileLoader>);
+        loaders.insert(
+            "gltf".into(),
+            Box::new(GltfLoader) as Box<dyn MeshFileLoader>,
+        );
+        loaders.insert(
+            "glb".into(),
+            Box::new(GltfLoader) as Box<dyn MeshFileLoader>,
+        );
         loaders.insert("obj".into(), Box::new(ObjLoader));
 
-        Self {
-            loaders
-        }
+        Self { loaders }
     }
 
     /// Loads a mesh and returns a `Result` containing the information.
     pub fn load_mesh<P: AsRef<Path>>(&self, path: &P) -> Result<MeshInfo> {
-        let ext = path.as_ref().extension()
+        let ext = path
+            .as_ref()
+            .extension()
             .and_then(|ext| ext.to_str())
             .ok_or(MeshLoaderError::MissingExtension)?;
 
         println!("Found extension {}, continuing with loading", ext);
 
-        self.loaders.get(ext)
+        self.loaders
+            .get(ext)
             .ok_or(MeshLoaderError::ExtensionNotSupported(ext.to_string()))?
             .load_mesh(path.as_ref())
     }

src/loaders/obj_loader.rs

@@ -1,14 +1,13 @@
-use std::path::Path;
-use wavefront::Obj;
 use crate::gpu::vertex3::Vertex3;
 use crate::loaders::mesh_loader::{MeshFileLoader, MeshInfo};
+use std::path::Path;
+use wavefront::Obj;
 
 pub struct ObjLoader;
 
 impl MeshFileLoader for ObjLoader {
     fn load_mesh(&self, path: &Path) -> anyhow::Result<MeshInfo> {
-        let obj_info = Obj::from_file(path)
-            .expect("Couldn't read wavefront file");
+        let obj_info = Obj::from_file(path).expect("Couldn't read wavefront file");
 
         let index_list = obj_info
             .triangles()
@@ -23,7 +22,7 @@ impl MeshFileLoader for ObjLoader {
             vertices: obj_info.positions().to_vec(),
             normals: obj_info.normals().to_vec(),
             indices: index_list,
-            uvs: obj_info.uvs().to_vec()
+            uvs: obj_info.uvs().to_vec(),
         })
     }
 }

test_scene.scene

@@ -2,10 +2,12 @@
     "name": "Testing Scene",
     "mesh_paths": {
         "gunship": "meshes/laat_gunship/scene.obj",
-    "trooper": "meshes/clone_trooper/scene.gltf"
+        "trooper": "meshes/clone_trooper/scene.gltf",
+        "destroyer": "../meshes/sw_isd.glb",
+        "interceptor": "../meshes/sw_tie_interceptor.glb"
     },
     "instances": {
-    "trooper": {
+        "interceptor": {
             "translation": [
                 0.0,
                 0.0,