Support facets with > 255 vertices. (tinyobjloader#375)

jdumas · web-flow · commit cc327eecf7f8 · 2023-12-23T02:01:19.000+09:00
diff --git a/tiny_obj_loader.h b/tiny_obj_loader.h
@@ -352,10 +352,9 @@ struct index_t {
 
 struct mesh_t {
   std::vector<index_t> indices;
-  std::vector<unsigned char>
+  std::vector<unsigned int>
       num_face_vertices;          // The number of vertices per
-                                  // face. 3 = triangle, 4 = quad,
-                                  // ... Up to 255 vertices per face.
+                                  // face. 3 = triangle, 4 = quad, ...
   std::vector<int> material_ids;  // per-face material ID
   std::vector<unsigned int> smoothing_group_ids;  // per-face smoothing group
                                                   // ID(0 = off. positive value
@@ -1946,7 +1945,7 @@ static bool exportGroupsToShape(shape_t *shape, const PrimGroup &prim_group,
         }
 
         shape->mesh.num_face_vertices.push_back(
-            static_cast<unsigned char>(npolys));
+            static_cast<unsigned int>(npolys));
         shape->mesh.material_ids.push_back(material_id);  // per face
         shape->mesh.smoothing_group_ids.push_back(
             face.smoothing_group_id);  // per face
