unreal-engine4

问题 Earlier in the day i figured out why my game doesn't work on multiplayer. The reason is that I use the "get player controller" which gives me the index 0 so i can't work. But i use this to get location where my player has to look at (for the get hit result under cursor) and I also use that for make spawn the projectile that my player launch. Do you have an idea of what i could use to make my game work on multiplayer. Here are 2 screen. Let me know if you need some other informations. event to

问题 Earlier in the day i figured out why my game doesn't work on multiplayer. The reason is that I use the "get player controller" which gives me the index 0 so i can't work. But i use this to get location where my player has to look at (for the get hit result under cursor) and I also use that for make spawn the projectile that my player launch. Do you have an idea of what i could use to make my game work on multiplayer. Here are 2 screen. Let me know if you need some other informations. event to

问题 I Have a variable that updates every time i move my cube in the level blueprint , now i want to access this variable from multiple class blueprints , what do I do , I tried casting to gamestate but didn't succeed , I am really new to ue4 if you could explain in details please edit: sorry for not adding details , The var I want to access is an integer named cube_side that tells me what side the cube is on every time I move , all of this happens in the level bp , I want to access this variable

问题 In Unreal, I want to rotate an actor where the forward vector points at target's current position, to ensure that the up vector of my actor is the same at the up vector of my target In Unity3D, it's super simple. It's a single line of code (source): transform.LookAt(target, Vector3.up); In blueprint, there's a Node called "Find Look at Rotation". The problem is that there's no Up vector parameter, so when you are close to the target, you can have a unwanted roll rotation. So, how can I create

问题 I'm new to UE4 development and I've followed Udemy's Unreal Engine Development course. I have created a new Component on an Actor, named PositionReporter with header PositionReporter.h #pragma once #include "CoreMinimal.h" #include "Components/ActorComponent.h" #include "PositionReporter.generated.h" UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) ) class BUILDINGESCAPE_API UPositionReporter : public UActorComponent { GENERATED_BODY() public: // Sets default values for this

问题 I'm new to UE4 development and I've followed Udemy's Unreal Engine Development course. I have created a new Component on an Actor, named PositionReporter with header PositionReporter.h #pragma once #include "CoreMinimal.h" #include "Components/ActorComponent.h" #include "PositionReporter.generated.h" UCLASS( ClassGroup=(Custom), meta=(BlueprintSpawnableComponent) ) class BUILDINGESCAPE_API UPositionReporter : public UActorComponent { GENERATED_BODY() public: // Sets default values for this

问题 I have a JSON object that I am getting from my server that looks something like this: { "state":"1", "player1": { "alias":"Player Name", "ready":"0" } } I am able to get the JSON, parse it into a FJsonObject, and retrieve any number or string in the first level of the JSON object using this code to serialize: TSharedPtr<FJsonObject> JsonParsed; TSharedRef<TJsonReader<TCHAR>> JsonReader = TJsonReaderFactory<TCHAR>::Create(json); if (FJsonSerializer::Deserialize(JsonReader, JsonParsed)) //Use

问题 I have this Jenkins server running on my Windows machine. What the jobs do is it runs some python code that is also on the same machine, to package .ipa file (for iOS) using UE4 engine and ships it. Everything works just fine if I run python code locally. But when I run it through Jenkins, it will fail at some point where UE4 is trying to sign the package. This is partial error message I'm getting. Using remote server 'XXX.YYY.ZZZ.56' on port 22 (user '***********') [Remote] Using private key

问题 I got an error while or after iterating over a mongocxx::cursor after finding some documents in my database. I am using Windows 10, Unreal Engine 4.16.1 and mongodb cxx 3.1.1. The database connection is set up correctly, the find function finds my documents and returns a valid cursor. It ends up in this Exception: Exception thrown at 0x00007FFDED56B698 (UE4Editor-Core.dll) in UE4Editor.exe: 0xC0000005: Access violation writing location 0x0000000000000010. with this output: 2598:0a50 @

问题 I got an error while or after iterating over a mongocxx::cursor after finding some documents in my database. I am using Windows 10, Unreal Engine 4.16.1 and mongodb cxx 3.1.1. The database connection is set up correctly, the find function finds my documents and returns a valid cursor. It ends up in this Exception: Exception thrown at 0x00007FFDED56B698 (UE4Editor-Core.dll) in UE4Editor.exe: 0xC0000005: Access violation writing location 0x0000000000000010. with this output: 2598:0a50 @