Function AttachUpdateSubObjects

Descent3/attach.cpp:585–636

Updates the position of all the subobjects off the ultimate attach parent

// Updates the position of all the subobjects off the ultimate attach parent
void AttachUpdateSubObjects(object *parent) {
  poly_model *parent_pm = &Poly_models[parent->rtype.pobj_info.model_num];
  int i;

#ifdef _DEBUG
  if (!Game_update_attach)
    return;
#endif

  if (parent->attach_children == NULL)
    return;

  for (i = 0; i < parent_pm->n_attach; i++) {
    object *child;

    if ((child = ObjGet(parent->attach_children[i])) != NULL) {
      ASSERT(child->flags & OF_ATTACHED);

      child->mtype.phys_info.velocity = parent->mtype.phys_info.velocity;
      child->mtype.phys_info.rotvel = parent->mtype.phys_info.rotvel;

      switch (child->attach_type) {
      case AT_UNALIGNED:
        AttachDoPosOrient(parent, i, child, child->attach_index, false);
        break;
      case AT_ALIGNED:
        AttachDoPosOrient(parent, i, child, child->attach_index, false);
        break;
      case AT_RAD: {
        vector attach_pos;
        vector attach_fvec;

        if (AttachPointPos(parent, i, true, &attach_pos, true, &attach_fvec)) {
          vector new_child_pos = attach_pos + attach_fvec * child->attach_dist;

          int room = parent->roomnum;
          if (ROOMNUM_OUTSIDE(room))
            room = GetTerrainRoomFromPos(&new_child_pos);

          ObjSetPos(child, &new_child_pos, room, NULL, false);
        } else {
          Int3(); // Get chris
        }
      } break;
      default:
        Int3(); // Non-supported attach type - Get Chris
      }

      AttachUpdateSubObjects(child);
    }
  }
}

// Unattaches an object from its parent
bool UnattachFromParent(object *child) {