Unreal Engine Logging - UE_LOG - How to use the powerful logging system in Unreal - UE C++ Tutorial скачать в хорошем качестве

Unreal Engine Logging - UE_LOG - How to use the powerful logging system in Unreal - UE C++ Tutorial

Here we explore how to do logging in the Unreal engine. After exploring syntax, we profile various logging scenarios to show the performance implications of logging. While performance is really fast, there is some cost that can add up. But most of this cost can me mitigated with appropriate usage of verbose flags and defaulting to a sensible value. Log categories can be removed from compile time flags in the DECLARE_LOG_CATEGORY_EXTERN macro. Default log levels can also be changed with the DECLARE_LOG_CATEGORY_EXTERN macro. We show how to change log levels with 3 methods. Changing log verbosity via the command line. Changing log verbosity via console commands Changing log verbosity via ini files. We explore some advanced logging features like UE_CLOG and UE_LOGFMT. We show that a log fatal crashes the application, and leaves some useful information in the log file around the callstack (if symbols present). We explore in real time how to create a new log category and use that to print a log line. Data Captured in UE 5.4. 0:00 Where logging is useful 0:25 UE_LOG macro explained 0:54 Making a new log category, DECLARE_LOG_CATEGORY_EXTERN and DEFINE_LOG_CATEGORY 3:03 Finish writing a new UE_LOG using our new category 4:08 Finding Log Files 4:21 Frame-number-like notation [123] is wrapped around 4:36 Looking at standard log features 5:05 UE_CLOG - for conditional logging 5:40 UE_LOG and formatting with specifiers like %f %i %s 7:23 UE_LOGFMT explained 7:58 Exploring log verbosity 9:03 Changing log levels via command line 9:43 Changing log levels via ini files 10:15 Print to screen 10:35 Log files are also updated, not just visual studio debug view 10:47 Fatal Logging Explored 11:37 Log files get renamed for editor, when rebooting 11:42 Changing log levels via cheat console 12:22 Compiled out logs via DECLARE_LOG_CATEGORY_EXTERN 13:03 LogTemp category explained 13:16 Read the official documentation 13:22 Performance - Looking into the log macros 13:58 Performance - Profiling the logging in a tick function 14:04 Performance - Disclaimers and caveats 14:42 Performance - Baseline performance - no logging, just tick 15:20 Performance - VeryVerbose disabled performance 16:17 Performance - Enabling a Verbose log, measuring impact 17:03 Performance - Adding 1 argument to the log 17:53 Performance - Thinking through the performance implications of logging 19:11 Closing summary