Add obj mesh support to viewer

crates/re_renderer/src/importer/obj.rs

@@ -15,7 +15,7 @@ use crate::{
 pub fn load_obj_from_buffer(
     buffer: &[u8],
     lifetime: ResourceLifeTime,
-    ctx: &mut RenderContext,
+    ctx: &RenderContext,
 ) -> anyhow::Result<Vec<MeshInstance>> {
     re_tracing::profile_function!();
 

crates/re_space_view_spatial/Cargo.toml

@@ -24,7 +24,7 @@ re_format.workspace = true
 re_log_types.workspace = true
 re_log.workspace = true
 re_query.workspace = true
-re_renderer = { workspace = true, features = ["import-gltf"] }
+re_renderer = { workspace = true, features = ["import-gltf", "import-obj"] }
 re_types = { workspace = true, features = ["ecolor", "glam", "image"] }
 re_tracing.workspace = true
 re_ui.workspace = true

crates/re_space_view_spatial/src/mesh_loader.rs

@@ -38,17 +38,20 @@ impl LoadedMesh {
     ) -> anyhow::Result<Self> {
         re_tracing::profile_function!();
 
-        let mesh_instances = if media_type == &MediaType::gltf() || media_type == &MediaType::glb()
-        {
-            re_renderer::importer::gltf::load_gltf_from_buffer(
+        let mesh_instances = match media_type.as_str() {
+            MediaType::GLTF | MediaType::GLB => re_renderer::importer::gltf::load_gltf_from_buffer(
                 &name,
                 bytes,
                 ResourceLifeTime::LongLived,
                 render_ctx,
-            )
-        } else {
-            anyhow::bail!("{media_type} files are not supported")
-        }?;
+            )?,
+            MediaType::OBJ => re_renderer::importer::obj::load_obj_from_buffer(
+                bytes,
+                ResourceLifeTime::LongLived,
+                render_ctx,
+            )?,
+            _ => anyhow::bail!("{media_type} files are not supported"),
+        };
 
         let bbox = re_renderer::importer::calculate_bounding_box(&mesh_instances);
 

crates/re_types/definitions/rerun/archetypes/asset3d.fbs

@@ -26,9 +26,9 @@ table Asset3D (
 
   /// The Media Type of the asset.
   ///
-  /// For instance:
+  /// Supported values:
   /// * `model/gltf-binary`
-  /// * `model/obj`
+  /// * `model/obj` (.mtl material files are not supported yet, references are silently ignored)
   ///
   /// If omitted, the viewer will try to guess from the data blob.
   /// If it cannot guess, it won't be able to render the asset.