# Programming & Scripting **URL:** https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=14 [Latest](https://forums.unrealengine.com/latest.md) · [Categories](https://forums.unrealengine.com/categories.md) · [Tags](https://forums.unrealengine.com/tags.md) **Page:** 15 --- ## [Niagara System – Make Particles Follow Mouse (Ball Pit Simulation)](https://forums.unrealengine.com/t/niagara-system-make-particles-follow-mouse-ball-pit-simulation/2422212)
**Author:** [@schlafse](https://forums.unrealengine.com/u/schlafse)\ **Replies:** 1\ **Last updated:** [October 19, 2026, 8:03am UTC](https://forums.unrealengine.com/t/niagara-system-make-particles-follow-mouse-ball-pit-simulation/2422212 "2026-10-19T08:03:25Z")
Hi, sorry for my bad English. I’m very new to UE5 and I’m making a ball pit simulation using niagara system (with PBD) and trying to make the particles follow the mouse. not click or hit anything, just follow the mouse c… --- ## [Is it possible to let Unreal read from a data table file preferably .csv or .txt file and let players edit that .csv file after the game is fully packaged](https://forums.unrealengine.com/t/is-it-possible-to-let-unreal-read-from-a-data-table-file-preferably-csv-or-txt-file-and-let-players-edit-that-csv-file-after-the-game-is-fully-packaged/723429)
**Author:** [@Juicegg](https://forums.unrealengine.com/u/Juicegg)\ **Replies:** 3\ **Last updated:** [October 19, 2026, 7:59am UTC](https://forums.unrealengine.com/t/is-it-possible-to-let-unreal-read-from-a-data-table-file-preferably-csv-or-txt-file-and-let-players-edit-that-csv-file-after-the-game-is-fully-packaged/723429 "2026-10-19T07:59:27Z")
I was inspired by Eurotruck Simulator 2 which offers an online internet radio streaming feature, which allows people to listen to their favortite stations by changing the default stations in a .txt file to their linked s… --- ## [How to Convert FString to TChar? ClipboardCopy 4.25](https://forums.unrealengine.com/t/how-to-convert-fstring-to-tchar-clipboardcopy-4-25/143274)
**Author:** [@Jacobm343hp](https://forums.unrealengine.com/u/Jacobm343hp)\ **Replies:** 1\ **Last updated:** [October 19, 2026, 7:51am UTC](https://forums.unrealengine.com/t/how-to-convert-fstring-to-tchar-clipboardcopy-4-25/143274 "2026-10-19T07:51:50Z")
Hello, I’m trying to simply expose a “copy string to Windows Clipboard function” to blueprint but I keep getting some kind of compiler error about Tchar conversion I’ve struggled for a long time with TChars and Chars v… --- ## [Niagara Damage Numbers with GAS](https://forums.unrealengine.com/t/niagara-damage-numbers-with-gas/2837135)
**Author:** [@LoganDolan](https://forums.unrealengine.com/u/LoganDolan)\ **Replies:** 3\ **Last updated:** [October 19, 2026, 7:02am UTC](https://forums.unrealengine.com/t/niagara-damage-numbers-with-gas/2837135 "2026-10-19T07:02:11Z")
I’m looking to use the Niagara system to spawn damage numbers, since its more efficient than UMG, but I’m not managing to make it work with the Gameplay Cue of the GAS. In my case, I need the particle system to spawn mu… --- ## [How can I set a UNiagaraDataInterfaceColorCurve from a color curve asset?](https://forums.unrealengine.com/t/how-can-i-set-a-uniagaradatainterfacecolorcurve-from-a-color-curve-asset/1343769)
**Author:** [@CresCoJeff](https://forums.unrealengine.com/u/CresCoJeff)\ **Replies:** 3\ **Last updated:** [October 19, 2026, 6:56am UTC](https://forums.unrealengine.com/t/how-can-i-set-a-uniagaradatainterfacecolorcurve-from-a-color-curve-asset/1343769 "2026-10-19T06:56:01Z")
I’m experimenting with Niagara, hoping to make a damage numbers particle effect that will normally use an all white color curve scaled by a user parameter to indicate the severity of the damage, and when a critical hit o… --- ## [How to synchronize playback of 5 Media Players? ](https://forums.unrealengine.com/t/how-to-synchronize-playback-of-5-media-players/2841741)
**Author:** [@karsowka](https://forums.unrealengine.com/u/karsowka)\ **Replies:** 1\ **Last updated:** [October 19, 2026, 12:37am UTC](https://forums.unrealengine.com/t/how-to-synchronize-playback-of-5-media-players/2841741 "2026-10-19T00:37:55Z")
Hi everyone, I’m having trouble synchronizing five Media Players. I have five video screens in my scene, each playing a different video. I need all five videos to start playing at the same time, because some parts of th… --- ## [please just let me make custom weapons in 1.0](https://forums.unrealengine.com/t/please-just-let-me-make-custom-weapons-in-1-0/2842253)
**Author:** [@MichaHil](https://forums.unrealengine.com/u/MichaHil)\ **Replies:** 0\ **Last updated:** [October 18, 2026, 9:47pm UTC](https://forums.unrealengine.com/t/please-just-let-me-make-custom-weapons-in-1-0/2842253 "2026-10-18T21:47:54Z")
None of the existing weapons suit my needs specifically and I don’t want to be forced to pick from them anyways. I know you can do this in UEFN but my entire workflow stems from 1.0 and I prefer how everything is visuall… --- ## [Async access to RenderTargets?](https://forums.unrealengine.com/t/async-access-to-rendertargets/358888)
**Author:** [@flipswitchingmonkey](https://forums.unrealengine.com/u/flipswitchingmonkey)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 8:37pm UTC](https://forums.unrealengine.com/t/async-access-to-rendertargets/358888 "2026-10-18T20:37:44Z")
Is there any way to get asynchronous access to RenderTargets? ReadPixels unfortunately checks whether it is being called from the GameThread and if not, fails. Is there a way to block RenderTargets so async access would … --- ## [How can i hide game window from the Windows taskbar?](https://forums.unrealengine.com/t/how-can-i-hide-game-window-from-the-windows-taskbar/90298)
**Author:** [@yimox](https://forums.unrealengine.com/u/yimox)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 8:30pm UTC](https://forums.unrealengine.com/t/how-can-i-hide-game-window-from-the-windows-taskbar/90298 "2026-10-18T20:30:45Z")
Only thing i found in the API is: SWindow::AppearsInTaskbar. This function just return bool indicating whether this window show up in the taskbar and do nothing. Is there a way to use unreal engine to hide my game wind… --- ## [Is there no way to prevent keyboard focus from being set to nothing?](https://forums.unrealengine.com/t/is-there-no-way-to-prevent-keyboard-focus-from-being-set-to-nothing/2842234)
**Author:** [@Krileon](https://forums.unrealengine.com/u/Krileon)\ **Replies:** 2\ **Last updated:** [October 18, 2026, 7:38pm UTC](https://forums.unrealengine.com/t/is-there-no-way-to-prevent-keyboard-focus-from-being-set-to-nothing/2842234 "2026-10-18T19:38:59Z")
I’m pulling my hair out on this nonsense. If you’ve a main menu and the Play button is focused then the player clicks on the background the Play button loses focus. I’ve tried all the tricks of setting the widget as Vis… --- ## [Unreal Engine Web Build Gradually Loses Performance When Loading Large Data Sets From My Website API](https://forums.unrealengine.com/t/unreal-engine-web-build-gradually-loses-performance-when-loading-large-data-sets-from-my-website-api/2840335)
**Author:** [@joerubel4](https://forums.unrealengine.com/u/joerubel4)\ **Replies:** 3\ **Last updated:** [October 18, 2026, 6:36pm UTC](https://forums.unrealengine.com/t/unreal-engine-web-build-gradually-loses-performance-when-loading-large-data-sets-from-my-website-api/2840335 "2026-10-18T18:36:34Z")
Hi All, I am working on an Unreal Engine project that connects to my website to retrieve and display dynamic information inside an interactive experience, and I am running into a performance problem that I have not been… --- ## [Is there a way to cancel the un crouch function. ](https://forums.unrealengine.com/t/is-there-a-way-to-cancel-the-un-crouch-function/2817091)
**Author:** [@3D\_guy\_the\_2nd](https://forums.unrealengine.com/u/3D_guy_the_2nd)\ **Replies:** 10\ **Last updated:** [October 18, 2026, 5:48pm UTC](https://forums.unrealengine.com/t/is-there-a-way-to-cancel-the-un-crouch-function/2817091 "2026-10-18T17:48:39Z")
I’m new to unreal engine and I’m trying to set up a crouch system using the built-in function. So, this setup works fine. until I walk under something and try to un crouch then crouch before walking out from under it. … --- ## [Choppable Tree with Chaos Destruction ](https://forums.unrealengine.com/t/choppable-tree-with-chaos-destruction/2690939)
**Author:** [@Miss\_Fatigue](https://forums.unrealengine.com/u/Miss_Fatigue)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 4:58pm UTC](https://forums.unrealengine.com/t/choppable-tree-with-chaos-destruction/2690939 "2026-10-18T16:58:10Z")
I’m wanting to recreate the system seen in this video (except have the damage done by the player instead of AI). I’ve got a tree that’s split into 3 sections, the stump, the damage section, and the tree.… --- ## [Character movement replication not working on moving and rotating platform / base ](https://forums.unrealengine.com/t/character-movement-replication-not-working-on-moving-and-rotating-platform-base/2701381)
**Author:** [@anonymous-edc](https://forums.unrealengine.com/u/anonymous-edc)\ **Replies:** 4\ **Last updated:** [October 18, 2026, 4:54pm UTC](https://forums.unrealengine.com/t/character-movement-replication-not-working-on-moving-and-rotating-platform-base/2701381 "2026-10-18T16:54:50Z")
Characters don’t replicate correctly while standing on a moving platform (= GetMovementBase()). This is especially bad when the platform also rotates, like a Viking ship theme park ride (e.g. a very big swing that the p… --- ## [Top Down Shooter - Have character move relative to current rotation](https://forums.unrealengine.com/t/top-down-shooter-have-character-move-relative-to-current-rotation/1782119)
**Author:** [@LuisA.Cascante](https://forums.unrealengine.com/u/LuisA.Cascante)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 4:51pm UTC](https://forums.unrealengine.com/t/top-down-shooter-have-character-move-relative-to-current-rotation/1782119 "2026-10-18T16:51:21Z")
I started Top Down Shooter game, but from the third person template (a recommendation from a YT tutorial). I have a function that rotates the character towards the mouse cursor, with a max rotation per tick. And then I … --- ## [Respawn dead player with on checkpoints in multiplayer](https://forums.unrealengine.com/t/respawn-dead-player-with-on-checkpoints-in-multiplayer/467485)
**Author:** [@anonymous\_user\_7eb4a778](https://forums.unrealengine.com/u/anonymous_user_7eb4a778)\ **Replies:** 2\ **Last updated:** [October 18, 2026, 4:48pm UTC](https://forums.unrealengine.com/t/respawn-dead-player-with-on-checkpoints-in-multiplayer/467485 "2026-10-18T16:48:04Z")
Hi, I created a multiplayer game following UE4 tutorial for Steam. I also created a checkpoint/respawn system which works perfect in a single player game mode but the checkpoint/respawn system does not work properly in … --- ## [Side-Scroller Shooter, how do I replicate mouse rotation?](https://forums.unrealengine.com/t/side-scroller-shooter-how-do-i-replicate-mouse-rotation/435934)
**Author:** [@anonymous\_user\_6decf5ce](https://forums.unrealengine.com/u/anonymous_user_6decf5ce)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 4:34pm UTC](https://forums.unrealengine.com/t/side-scroller-shooter-how-do-i-replicate-mouse-rotation/435934 "2026-10-18T16:34:33Z")
Hi, I am making a Side-Scroller Shooter. I was able to replicate many things to multiplayer, except for this controller scheme that works fine in singleplayer, but that I simply could not get it to work in multiplayer I… --- ## [Twin Stick controls - Seperate movement and aim firection](https://forums.unrealengine.com/t/twin-stick-controls-seperate-movement-and-aim-firection/397668)
**Author:** [@anonymous\_user\_f94dcb1b1](https://forums.unrealengine.com/u/anonymous_user_f94dcb1b1)\ **Replies:** 2\ **Last updated:** [October 18, 2026, 4:02pm UTC](https://forums.unrealengine.com/t/twin-stick-controls-seperate-movement-and-aim-firection/397668 "2026-10-18T16:02:25Z")
I’m trying to make a twin stick shooter stylish game. I can’t make the player move (with the left stick of the controller) while using the right stick to face/aim a different direction. Any ideas? --- ## [Help understanding enums and select nodes](https://forums.unrealengine.com/t/help-understanding-enums-and-select-nodes/2842138)
**Author:** [@Nortksi](https://forums.unrealengine.com/u/Nortksi)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 2:16pm UTC](https://forums.unrealengine.com/t/help-understanding-enums-and-select-nodes/2842138 "2026-10-18T14:16:39Z")
For my retro style soccer game I want to set the AIs’ tactics based on the teams’ formation. For example, if the team formation is set to 4-4-2 then I want to select the 4-4-2 tactics map from an array as the current ta… --- ## [Getting per instance HISM data](https://forums.unrealengine.com/t/getting-per-instance-hism-data/1375600)
**Author:** [@Dale\_Wastell](https://forums.unrealengine.com/u/Dale_Wastell)\ **Replies:** 3\ **Last updated:** [October 18, 2026, 1:40pm UTC](https://forums.unrealengine.com/t/getting-per-instance-hism-data/1375600 "2026-10-18T13:40:08Z")
Hello awesome comunity. How do I save additional per instance data for a hierarchical instanced static mesh? I have a game that simulates an ecosystem and am running into a problem with the hierarchical instanced stati… --- ## [Crash using Nav Link Proxy and packaged game](https://forums.unrealengine.com/t/crash-using-nav-link-proxy-and-packaged-game/2275573)
**Author:** [@fr-coder](https://forums.unrealengine.com/u/fr-coder)\ **Replies:** 16\ **Last updated:** [October 18, 2026, 11:05am UTC](https://forums.unrealengine.com/t/crash-using-nav-link-proxy-and-packaged-game/2275573 "2026-10-18T11:05:26Z")
The nav link proxy is broken when using packaged build in windows. Trying to enable it during cause game crash. Anyone know a fix for that? Here the steps to reproduce: Create any project Add a Nav Link Proxy. Enable … --- ## [Chaos Destruction replication don't work with ForceDynamicSwitch (DynamicState field)](https://forums.unrealengine.com/t/chaos-destruction-replication-dont-work-with-forcedynamicswitch-dynamicstate-field/1845191)
**Author:** [@laymard\_ME](https://forums.unrealengine.com/u/laymard_ME)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 10:57am UTC](https://forums.unrealengine.com/t/chaos-destruction-replication-dont-work-with-forcedynamicswitch-dynamicstate-field/1845191 "2026-10-18T10:57:42Z")
Hello there ! I am making GeometryCollectionActor inside AnchorField. I am spawning the blueprint FS\_MasterField provided by the engine in order to destroy the mesh. The FS\_MasterField has the property ForceDynamicFie… --- ## [Need help properly replicaiting or doing client side prediction on chaos geometry collection.](https://forums.unrealengine.com/t/need-help-properly-replicaiting-or-doing-client-side-prediction-on-chaos-geometry-collection/2579940)
**Author:** [@xsmokumsx](https://forums.unrealengine.com/u/xsmokumsx)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 10:51am UTC](https://forums.unrealengine.com/t/need-help-properly-replicaiting-or-doing-client-side-prediction-on-chaos-geometry-collection/2579940 "2026-10-18T10:51:06Z")
Does anyone here know if its possible to do client side prediction on Geometry collections? I’ve got a chaos field system running, but my only problem right now is it only seems to run on my server. I would love for my p… --- ## [Smooth Replication of Moving Platforms or Spline-Based Actors in Multiplayer (Listen Server)](https://forums.unrealengine.com/t/smooth-replication-of-moving-platforms-or-spline-based-actors-in-multiplayer-listen-server/2664245)
**Author:** [@lFearlessBanana](https://forums.unrealengine.com/u/lFearlessBanana)\ **Replies:** 2\ **Last updated:** [October 18, 2026, 10:47am UTC](https://forums.unrealengine.com/t/smooth-replication-of-moving-platforms-or-spline-based-actors-in-multiplayer-listen-server/2664245 "2026-10-18T10:47:18Z")
In Unreal Engine 5 multiplayer (listen server), how can I properly replicate a moving actor (like a moving platform or spline-based mesh) so that both client and server see the same smooth motion without stuttering? --- ## [ How to Create Parkour Mechanics Like Prince of Persia in Unreal Engine? I'm Struggling with Ledge Climb and Wall Run ](https://forums.unrealengine.com/t/how-to-create-parkour-mechanics-like-prince-of-persia-in-unreal-engine-im-struggling-with-ledge-climb-and-wall-run/2481316)
**Author:** [@annu7300](https://forums.unrealengine.com/u/annu7300)\ **Replies:** 2\ **Last updated:** [October 18, 2026, 9:59am UTC](https://forums.unrealengine.com/t/how-to-create-parkour-mechanics-like-prince-of-persia-in-unreal-engine-im-struggling-with-ledge-climb-and-wall-run/2481316 "2026-10-18T09:59:04Z")
Hi everyone, I’m currently developing a game in Unreal Engine, and my player wants the character to move like in Prince of Persia — with parkour actions such as wall running, ledge climbing, vaulting, and smooth travers… --- ## [Event driven HUD update!](https://forums.unrealengine.com/t/event-driven-hud-update/1709612)
**Author:** [@GodAnubis1994](https://forums.unrealengine.com/u/GodAnubis1994)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 9:44am UTC](https://forums.unrealengine.com/t/event-driven-hud-update/1709612 "2026-10-18T09:44:50Z")
Hey everyone, hopefully someone can help me with my problem! I am making a survivors-like game for my study project, the main point here should be the answering of trivia question. So when the player reaches level 5, 1… --- ## [Blueprint Obstacle Spawn Array variation](https://forums.unrealengine.com/t/blueprint-obstacle-spawn-array-variation/2079108)
**Author:** [@Ueber-Thymos](https://forums.unrealengine.com/u/Ueber-Thymos)\ **Replies:** 2\ **Last updated:** [October 18, 2026, 9:40am UTC](https://forums.unrealengine.com/t/blueprint-obstacle-spawn-array-variation/2079108 "2026-10-18T09:40:00Z")
Hello, noob question: I have a track section for an endless runner where obstacles spawn. However, I don’t want to spawn all of the obstacles at once; I want to vary the number of obstacles randomly. How do I wire th… --- ## [Twin Stick Shooter Template (Help with small change)](https://forums.unrealengine.com/t/twin-stick-shooter-template-help-with-small-change/414944)
**Author:** [@C.Satizabal](https://forums.unrealengine.com/u/C.Satizabal)\ **Replies:** 2\ **Last updated:** [October 18, 2026, 9:36am UTC](https://forums.unrealengine.com/t/twin-stick-shooter-template-help-with-small-change/414944 "2026-10-18T09:36:03Z")
I want the space craft to always be facing the mouse curser. And I want the front of the ship to be shooting the projectile, not arrow key controls. --- ## [How would I start to implement a simultaneous weapon firing system?](https://forums.unrealengine.com/t/how-would-i-start-to-implement-a-simultaneous-weapon-firing-system/533404)
**Author:** [@Castineiras](https://forums.unrealengine.com/u/Castineiras)\ **Replies:** 3\ **Last updated:** [October 18, 2026, 9:33am UTC](https://forums.unrealengine.com/t/how-would-i-start-to-implement-a-simultaneous-weapon-firing-system/533404 "2026-10-18T09:33:58Z")
I’m currently developing a twin stick shooter and I’m wondering how I would deal with multiple weapons? For example, by default the players weapon shoots normal bullets, however after getting an upgrade, rockets are als… --- ## [Correctly replicate platform ?](https://forums.unrealengine.com/t/correctly-replicate-platform/2513726)
**Author:** [@Pierrax](https://forums.unrealengine.com/u/Pierrax)\ **Replies:** 1\ **Last updated:** [October 18, 2026, 9:32am UTC](https://forums.unrealengine.com/t/correctly-replicate-platform/2513726 "2026-10-18T09:32:11Z")
Hi guys, i’m having a real trouble, my character client side has jittery movement on platform that are moving I’m using timelines or set actor, set scene world location, relative location, whatever, with replicated chec… [Previous page](https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=13) [Next page](https://forums.unrealengine.com/c/development-discussion/programming-scripting/148.md?page=15)