able to set the parent object when adding a new object into the scene

n64/engine/include/scene/scene.h

@@ -68,6 +68,7 @@ namespace P64
     fm_vec3_t pos{0,0,0};
     fm_vec3_t scale{1,1,1};
     fm_quat_t rot{0,0,0,1};
+    uint16_t groupId{0};
     uint16_t objectId{0};
   };
 
@@ -178,13 +179,15 @@ namespace P64
        * @param pos initial pos (default origin)
        * @param scale initial scale (default 1)
        * @param rot initial rotation (none)
+       * @param desiredGroupId id for the parent object
        * @return ID of the new object
        */
       uint16_t addObject(
         uint32_t prefabIdx,
         const fm_vec3_t &pos = {0,0,0},
         const fm_vec3_t &scale = {1,1,1},
-        const fm_quat_t &rot = {0,0,0,1}
+        const fm_quat_t &rot = {0,0,0,1},
+        uint16_t desiredGroupId = 0
       );
 
       void removeObject(Object &obj);

n64/engine/src/scene/scene.cpp

@@ -138,6 +138,7 @@ void P64::Scene::update(float deltaTime)
     loadObject((uint8_t*&)data.prefabData, [&](Object &obj)
     {
       obj.id = data.objectId;
+      obj.group = data.groupId;
       obj.pos = data.pos;
       obj.scale = data.scale;
       obj.rot = data.rot;
@@ -332,14 +333,16 @@ uint16_t P64::Scene::addObject(
   uint32_t prefabIdx,
   const fm_vec3_t &pos,
   const fm_vec3_t &scale,
-  const fm_quat_t &rot
+  const fm_quat_t &rot,
+  uint16_t desiredGroupId
 ) {
   auto *prefabData = AssetManager::getByIndex(prefabIdx);
   objectsToAdd.push_back({
     .prefabData = prefabData,
     .pos = pos,
     .scale = scale,
     .rot = rot,
+    .groupId = desiredGroupId,
     .objectId = ++nextId,
   });
   return nextId;