fix: generate json in non-binary glTF path

src/foundation/io_gltf.cpp

@@ -248,18 +248,27 @@ bool write_gltf(const std::string& filepath, const mesh::HalfedgeMesh& mesh,
         return true;
     } else {
         // ── glTF JSON + separate .bin ──
-        std::ofstream file(filepath);
-        if (!file) return false;
-        file << json;
-
-        // Write separate bin
+        // Determine bin filename from output path
         std::string dot = ".";
         size_t dot_pos = filepath.rfind(dot);
         std::string binpath;
-        if (dot_pos != std::string::npos)
+        std::string bin_basename;
+        if (dot_pos != std::string::npos) {
             binpath = filepath.substr(0, dot_pos) + ".bin";
-        else
+            // Extract just the filename
+            size_t slash_pos = binpath.rfind('/');
+            bin_basename = (slash_pos != std::string::npos)
+                ? binpath.substr(slash_pos + 1) : binpath;
+        } else {
             binpath = filepath + ".bin";
+            bin_basename = binpath;
+        }
+
+        std::string json = generate_json(mesh, options, layout, bin_basename);
+
+        std::ofstream file(filepath);
+        if (!file) return false;
+        file << json;
 
         std::ofstream bin(binpath, std::ios::binary);
         if (!bin) return false;

tests/foundation/test_io_gltf.cpp

@@ -3,6 +3,7 @@
 #include <cstdio>
 #include "vde/foundation/io_gltf.h"
 #include "vde/brep/modeling.h"
+#include "vde/brep/modeling.h"
 
 using namespace vde::foundation;
 using namespace vde::mesh;