- m_gamedef(gamedef),
- m_modified(MOD_STATE_WRITE_NEEDED),
- m_modified_reason(MOD_REASON_INITIAL),
- is_underground(false),
- m_lighting_expired(true),
- m_day_night_differs(false),
- m_day_night_differs_expired(true),
- m_generated(false),
- m_timestamp(BLOCK_TIMESTAMP_UNDEFINED),
- m_disk_timestamp(BLOCK_TIMESTAMP_UNDEFINED),
- m_usage_timer(0),
- m_refcount(0)