Import glTF 2.0 files (.glb, .gltf) as mesh bodies (#1512)

glTF files open, insert and drop like 3MF/STL/OBJ: a component named after the file, the node tree as nested rigid components, repeated meshes as occurrences, metres to mm, Y up turned to Z up by default (up: z keeps axes), materials as PBR appearances. Bounded, hostile-input tested reader; no new persisted data. Closes #1505.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

apps/solidcraft-web/src/files.rs

@@ -458,7 +458,7 @@ fn input_picker(files: &Rc<Files>, intent: Intent) {
     let Some(doc) = web_sys::window().and_then(|w| w.document()) else { return };
     let Ok(input) = doc.create_element("input").map(|e| e.unchecked_into::<web_sys::HtmlInputElement>()) else { return };
     input.set_type("file");
-    input.set_accept(".solidcraft,.solvecraft,.json,.step,.stp,.3mf,.stl");
+    input.set_accept(".solidcraft,.solvecraft,.json,.step,.stp,.3mf,.stl,.obj,.glb,.gltf");
     // Attached (hidden) while it is open: some browsers ignore a click on a detached input.
     let _ = input.set_attribute("style", "display:none");
     if let Some(body) = doc.body() {

apps/solidcraft-web/src/main.rs

@@ -85,7 +85,16 @@ mod web {
             for (text, error) in self.files.messages.borrow_mut().drain(..) {
                 self.app.set_status(text, error);
             }
-            let incoming: Vec<_> = self.files.incoming.borrow_mut().drain(..).collect();
+            let mut incoming: Vec<_> = self.files.incoming.borrow_mut().drain(..).collect();
+            // A glTF file's buffers picked with it are kept next to it, not opened.
+            incoming.retain_mut(|(name, bytes, _)| {
+                let companion =
+                    std::path::Path::new(name.as_str()).extension().and_then(|e| e.to_str()).is_some_and(|e| e.eq_ignore_ascii_case("bin"));
+                if companion {
+                    vfs::insert(&format!("{}{name}", files::UPLOAD), std::mem::take(bytes));
+                }
+                !companion
+            });
             for (name, bytes, intent) in incoming {
                 let design = solidcraft_engine::io::is_design_path(&name);
                 let path = if design && intent == Intent::Open {