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13 votes
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How are the Unreal Development Kit (UDK) and Unreal Engine 4 (UE4) related?

Yes. The UDK is related to UE4 - The UDK is based off of Unreal Engine 3 to which Unreal Engine 4 is the successor. To the initial end user a number of things have changed. Unreal Engine 4 replaces ...
  • 2,940
8 votes
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Unreal Engine 4 is now only free or open source as well?

From their website Full Source Code Access With C++ source code for all of Unreal Engine 4, you can customize and extend Unreal Editor tools and Unreal Engine subsystems, including physics, ...
6 votes

How can I get a reference to a object in the world in UE4?

I have managed to sort it out. Basically I have to use an Actor Iterator which iterates through every Obstacle object in the game world. Here is the code: ...
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6 votes
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How to create a looping or spherical world?

I am not familiar with the Unreal engine, so this answer will focus solely on Unity. Unity's game scenes are strictly euclidean and do not allow real portals. But what you can do is separate the ...
  • 113k
5 votes

How to determine lowest PC requirenments for my game to run

First thing: as @ZEKE has suggested in the comments to your question, you should check: How do I determine my games minimum hardware/software requirements? Also, in the end of the day, only ...
  • 4,885
5 votes

What exactly is the difference between Unreal Development Kit and Uunreal Engine 4?

According to this link WHAT IS UDK? Unreal Development Kit was the free edition of Unreal Engine 3. It remains available for teams completing projects in UE3. Get UDK (February 2015 UDK). So you ...
  • 905
5 votes

Do I have to compile Unreal 4's source myself in order to make games with it?

You don't need to build the the engine / editor yourself. There are several iterations of the engine (current is 4.4), since they released it earlier this year (4.0), are you sure that you used the ...
  • 51
5 votes

Do we really need quaternions? In UE4 I rotate without them

Rotating around euler-angles in world-space makes sense as long as you have a concept of a fixed horizon and a fixed "up" and "down" direction (like in a first person shooter). But in some other ...
  • 113k
5 votes
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Unreal Engine without Blueprints

I think I am in the same mindset as you are. Yes you can work in 100% C++. My own project is 95% C++ I only use BPs for instantiating stuff (putting actors to the level) but every single BP of mine ...
4 votes

Unpacking UE4 .pak's?

You can just use UnrealPak. Engine\Binaries\Win64\UnrealPak.exe somepak.pak -extract X:\extract\here
4 votes

What type of networking archtitecture does Unreal Engine 4 have?

I believe UE4 network architecture is roughly the same as in prior versions of Unreal Engine, perhaps with minor refinements, and goes back to the very first version of Unreal Engine. This is a ...
  • 140
4 votes
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Can I use Paragon assets store assets in other Engines besides Unreal?

I should have read the description on the assets Licensed for use only with UE4 based products. Includes the character model, animations and skins Other assets that Unreal didn't make themselves are ...
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3 votes

Importing materials from blender to UE4

If you want to create a transparent material you have to make your material "translucent". Glass also has the property that its surface is very shiny, so you also have to change the "Translucency ...
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3 votes
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How to create custom gravity in unreal engine and only affect specific actors?

I know they're planning to un-hardcode Gravity [Source: I'm a moderator on the official Unreal Engine forums, I know things ;)] but the best way is to either add force in the direction you want or set ...
  • 46
3 votes

Is it possible to use the Unreal Engine as a big C++ library, without using the editor?

Breaking down what the editor provides and how you can side-step its usage: Compiling Technically this is something that Visual Studio is providing but still important. Compiling Unreal is non-...
  • 517
3 votes

Unreal Engine Player Quality

I figured it out. Window>Toolbar if you don't already have the toolbar up. Settings>Engine Scalability Settings> Whatever scale level you like. Evidently, that dialogue set this value to Low. I ...
  • 183
3 votes
Accepted

Multiple UV coordinates in Unreal Engine Procedural Mesh Component?

The only possibilty you have is to add the vertex twice, if no collision is generated, this will have almost no performance impact, if you do want collision, subclass the UProceduralmeshComponent ...
  • 139
3 votes
Accepted

Convert global 3d coordinate system to a local one with specific direction

Construct a matrix like so, where each vector is one column of the matrix: [ House's X+ direction | House's Y+ direction | House's Z+ direction | House's position] The fourth row should be [0, 0, 0, ...
  • 117k
3 votes
Accepted

UE4 Multiplayer how to replicate Player name in lobby

The PlayerControllers for all players exist only on the server. Each client only has its own PlayerController, but none of the others. Calling GetController on a pawn will only work if you're on the ...
  • 205
3 votes
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C++ map isn't finding key even though it exists

As noted in the comments, your operator< is wrong. For std::map to function properly, the ...
  • 1,930
3 votes

How mesh transformation works under the hood

There's an additional detail I want to clarify here: As far as I understand (at least I would do this), we store the original mesh, and then for every change (shift, rotation or scaling) we turn the ...
  • 117k
3 votes
Accepted

Casting from APawn* to MyCustomCharacter* ? Is this ok?

why not use the UE's Cast function? APlayerMallet* mallet=(APlayerMallet*)gamestate->PlayerArray[i]->GetPawn(); Becomes: ...
  • 156
3 votes

What does the 'step' node do in Unreal Engine?

Here is what the Unreal documentation has to say: The Step Material Expression returns 0 or 1 for every value of X, depending on whether it is greater than or less than the reference value in Y. ...
  • 141
2 votes
Accepted

Installing Unreal Engine 4 in Ubuntu -- setting OAuth

This is actually something that's not specific to Unreal Engine 4. OAuth is an authorization token so you don't need to log in with credentials. You first need to generate this token using your ...
  • 72.8k
2 votes

Do I have to compile Unreal 4's source myself in order to make games with it?

If you use the monthly subscription option, you are given access to the private GitHub repository and must compile the editor before you can use it. The wiki has an excellent walkthrough of the ...
  • 121
2 votes

UE4: Apply texture on landscape based on angle

To apply different textures based on height the general method is to, in a pixel shader; Find the height of the geometry at the current pixel position. Perform a texture lookup on the heightmap that ...

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