Unreal Concepts - Updating Data From a Text File at Runtime ( UE4 )

[@mFurb988]

Thank you for the clear explanation Mathew. For those who are on UE version 4.27.2, the function on line 10 in the .cpp file called "FPaths::GameContentDir()" is deprecated and replaced with "FPaths::ProjectContentDir()".

[@tommasoriconda8845]

Thank you, was looking exactly at this

[@crossmr]

This is also relevant for 4.26 gamecontentdir doesn't work

[@安柠-l2y]

Thank you! and for anybody wondering, UE5.0 and 5.1 uses ProjectContentDir() as well, works with mine.

[@LoganPinney]

@@安柠-l2y THANKS!

[@Todstaa]

Hey, thank you for the update. I'm still trying to get this to work. Unfortunately my values don't show up with a change of the .txt :/ They only shortly show up when I use the event "BeginPlay" in Blueprint. Can anyone help me? THank you guys in advance :)

[@blakemccorkle18]

If you use this method (or the 3rd party plugins) you can write strings to an HTML file, and if you follow correct formatting, or append to the file correctly, it will dynamically build a web page from your data in Unreal. (Used in conjuction with the Unreal Web server, it makes a neat, handy little interface that you can control Unreal from your smart phone or anything that can access a web page) Thanks for this Mat, sure a lot of people will find this handy!

[@saish24]

Is there any video to refer to do this with widgets into browser?

[@mikeholmes3203]

tutorial would be awesome

[@GoatOfTheWoods]

Liking the UE Concepts you're doing, and welcome back!

[@getrekt8365]

Man, you have such great videos! Explaining very important things, thank you so much for all your hard work.

[@migzleon4047]

Thank you for sharing, your stuff is the truly the best...

[@michaelvollrath3192]

Thank you for your wonderful and easy to follow tutorials!

[@TheoPernel]

thank you so much your tutorials are awesome

[@frankybleep2167]

Quite a usefull thing to know! And at the apropiate time too o.o I am right now freelancing a visual novel kinda thing, so probably I can make use of this in a proper way. Thankyou very much!

[@mxmtrsv]

What is UpdateFromFile Event?

[@RodrigoEstape]

And how we can apply the FFileHelper::SaveArrayToFile in C++? To write and load binary files on disk direct from Blueprint?

[@SoyalicSinan]

Welcome back Mathew!

[@EricYi-km9dh]

Hello, I'm a student from taiwan. I have a question about how to update the cloudpoint data in UE4 at run time. There's a Lidar in my lab, and I'll import the cloud point stored as .txt file with the xyz data into my project in UE. Because when I import the txt file into UE, it will be tranfered to uasset file, If i want to update the cloud point when the txt was updated, I have to right click and reimport the uasset file. , I hope the cloudpoint in UE can update with the change of the .txt automatically when I start Lidar rescan the enviorment and change the data in the txt file. thank you for your helping.

[@sHootR450]

Just use the lidar pointcloud plugin and create a gui with a button that calls the reimport LiDAR pointcloud blueprint node

[@omegablast2002]

Yea!!! Excellent guide!

[@youssefelhefnawy7009]

Thanks man that was very helpful

[@Lusiogenic]

Awesome stuff!

[@osoiman]

Is there an equivalent image import function, for, say, profile images, decals/paint sprays?

[@CultivationPath]

Hi! i'm having some troubles with the code, it does not recognises my class as valid. I have the exact same code, only changing the name "UBPFL_FileIo" to "ReadromText" Anyone know why this may be happening?

[@theoshen60]

Amazing !Thank you for your sharing Mathew! But is there any possibility that I could use C++ to syncronize the data between an Excel table and Unreal Engine in real time? (Both input and output data from UE to Excel table)

[@richardkirkden3121]

Great tutorial, as always! Is there is a way to make this work for a UE4.23 project that has been packaged for HTML5? I could not find a place to put the text file where the packaged project could read it. Perhaps the data have to be in an HTML file instead of a text file, in which case this is the same question as the one asked by George Roboz Recursive Digital.

[@johnk6598]

So this keeps re-reading the file to detect changes? No way to make it event driven?

[@MarkOfArgyll]

Been over two decades since I last had to code anything so please forgive me if this seems a redundant question. Could this be adapted to allow a BP to get just about any type of file from a specific folder? I'm thinking along the lines of being able to have a dedicated folder for different objects/items etc that can be dynamically added without needing to specifically add each one sort of thing.

[@metamatics.]

Hey did you ever solve this?

[@emin86]

This is great, thanks. Is there a way to execute the packaged game with CMD with a parameter to specify the data.txt file?

[@angrybonobro8711]

Hello, where could i suggest a topic for a video? I would like some videos on the Blend nodes from Material editor (Blend_ColorBurn, Blend_Darken, Blend_Screen, etc)

[@burrito9025]

Do you recommend this method for a simple database handled by server in a multiplayer online game?

[@adam4designss]

how we do it now with json plugin in ue4 ,iam beginner

[@Motionz.g]

hi bro i already started unreal 2month ago i watched alot of tutorial building game but i'am missing base of concepts and i have found alots of useful playlist within your channel which playlist should i start?

[@OliverK-XY99]

Can we download this project somewhere?

[@Rafa_VFX]

Hello! can I change an image externally without having to insert it into the project? This after I made the package in Unreal. I imagine using a .txt with the folder location of this image.

[@NirajMangalvedhekar]

Hi, I'm working on a similar thing. Please update me if you find any way out. Also maybe you can look into Cloud database. I'm thinking about that now

[@MacielDario]

Didnd try yet but you could use a url in the text file. and you change the url to the new image on the web download the image from the url and apply it to something.

[@techgnosis3693]

Thank you..!!

[@tarnumthefrail]

Nice tutorial! Does this work packaging for Linux?

[@TheAxebeard]

Would it be possible to allow for the import of FBX or OBJ files to be used at run-time? I'd like to make my project as moddable as possible.

[@gentleWack]

did you manage to resolve the question?

[@TheAxebeard]

@@gentleWack Yeah, I had to use the Rama Victory plugin, but I've been able to import models and textures at runtime in a project. You basically, find the file via Blueprint, then Set Static Mesh etc.

[@tikharhelsing1125]

nice

[@juvusart]

What? Unfortunatly we are using c++? :'-( Thanks God, we are using c++! :-)

[@tadeuariasvillares784]

What's the reason behind the " Unfortunately, we're using C++."? You work with the UE4 at it's full potential when you use both BP and C++, so, UNFORTUNATELY, you made an UNFORTUNATE comment in your video.

[@chrisbenton309]

You're so right! Epic should just delete the whole Blueprint language and force every user to go through arduous c++ training before they're allowed near the tools! That'll be a secret to UE's success, no doubt. Genius!