972K views · Jun 8, 2012 · 10:30 · 1 HN recommender · 3 mentions · discussed 2015–2016
A GameTrailers walkthrough from E3 2012 of an Unreal Engine 4 real-time tech demo with Epic's Alan Willard. It shows live code changes and hot reloading while the game runs.
Why Hacker News points people here: HN cites it as a favorite demo of live coding and hot reload in a game engine.
“This is my favorite Unreal 4 demo”HN comment, 2015
“This is my favorite Unreal 4 demo”
Unreal 4 demo with live code swapping while in game.
This is my favorite Unreal 4 demo - this video (sadly missing the wonderful quote "I light my level by dropping a sun in.") I'm completely in awe of the feedback loop here. It even compiles and swaps code while you're in the game!
“they hop to Visual Studio where they change gravity. After a few seconds of compilation, the game's code is updated.”
Shows changing gravity in Visual Studio with hot reload.
A few years ago (2012) I was taken aback by the Unreal Engine development process. Their IDE features a running game with all elements being selectable and interactively editable. In one video fragment [1] they hop to Visual Studio where they change gravity. After a few seconds of compilation, the game's code is updated. [1] this video
“jump to 9:40 if it doesn't load at this point automatically”
Demonstrates Unreal 4 live coding hot-reload.
I believe that on Unreal Engine 4, you use C++ and it does have a feature that mimics "live coding" where it recompiles and hot-reload your game even while playing. edit: here it is this video (jump to 9:40 if it doesn't load at this point automatically)
