UE4

What is WindowCapture2D? This is a Window Capture plugin usable in Unreal Engine. It allows you to treat the display of other application windows on Windows as textures within your own UE4 project. Therefore, you can do things like attach it to a mesh and place it in 3D space, or attach it to an Image in UMG. Since it scans in real-time and updates the texture content, if the display of the source window updates, the texture display will also update. ...

UE4 World Size Problem I’ll jot down a problem I encountered in content I was recently creating. In that content, I was driving a car using WheeledVehicle, and recently I significantly expanded the driving area. When I tested if it worked properly, the car disappeared around the 10km mark…. I was worried that the processing might become heavy due to the area being too large, but I didn’t imagine the car would suddenly disappear. ...

ObjectDeliverer Version 1.2.1 Released This time, I fixed the following bug pointed out by a user. Editor crashes if a port already in use is specified for UDPReceiver InnerSocket = FUdpSocketBuilder(TEXT("ObjectDeliverer UdpSocket")) .WithReceiveBufferSize(1024 * 1024) .BoundToPort(BoundPort) .Build(); Receiver = new FUdpSocketReceiver(InnerSocket, FTimespan::FromMilliseconds(10), TEXT("UProtocolUdpSocketReceiver")); Receiver->OnDataReceived().BindUObject(this, &UProtocolUdpSocketReceiver::UdpReceivedCallback); Receiver->Start(); if (InnerSocket) { DispatchConnected(this); } The above is the source code before the fix. If a port number already in use was specified for BoundPort, InnerSocket would contain nullptr, causing a crash when FUdpSocketReceiver was subsequently generated. ...

UMG Support I have implemented UMG support for the WindowCapture2D plugin for UE4, which I recently released on GitHub. WindowCaptureのUMG対応ができました。 Capture機能をObjectに移譲することでActorとWidget両方で使用できるようにしました。#UE4 pic.twitter.com/P3ME2eWzBN — ayuma (@ayuma_x) June 20, 2019 This allows pasting the captured image not only in 3D space but also at a fixed position within a window. How to Use Place “WindowCaptureUMG” in the UserWidget. That’s it. The properties to set for WindowCaptureUMG are the same as those for the Actor version, WindowCapturePlane, so it can be used with the same settings method whether it’s an Actor or a Widget. ...

WindowCapture2D This time, I released a window capture plugin usable in Unreal Engine on GitHub. Currently, it’s only available on GitHub, but I plan to release it on the Marketplace once the features are a bit more consolidated. Thoughts on WindowCapture At one point, I wanted to display a Windows application within a VR space in UE4 for VR content and researched various methods, but couldn’t find a feature that directly matched. ...

EasyJsonParser I have released EasyJsonParser as my third self-made UE4 plugin. EasyJsonParser: ayumax: Code Plugins - UE4 Marketplace This shares the same concept as the second plugin, EasyXMLParser, allowing you to retrieve values within Json using a simple access method from Blueprints. I have also uploaded a sample project to GitHub, so please refer to it if you are interested. How to Use After loading a Json string or Json file, retrieve values by specifying an access string. ...

ObjectDeliverer V1.2.0 has been released. The changes are the following two points: Fixed a bug where using PacketRuleNodivision for UDP reception caused an infinite loop. Added an option for TCP/IP clients to automatically attempt connection when the server disconnects. Fixed bug causing infinite loop when receiving UDP using PacketRuleNodivision As shown above, using the UDP reception feature with PacketRuleNodivision caused a bug where it entered an infinite loop upon receiving data once. This has been fixed. ...

EasyXMLParser Today, I submitted a plugin named EasyXMLParser to the Unreal Engine Marketplace. This is my second work, following the previously released ObjectDeliverer. Last time I listed it for free, but this time I have set a price. I focused on ease of use when creating it, so please consider it if you like. A sample using this plugin is available on GitHub. Feature Introduction Introducing the features of EasyXMLParser. ...

Shared Memory Sample I had previously prepared ObjectDeliverer samples on GitHub, but for shared memory, only the reading side was implemented, and the process wasn’t complete. So, I newly implemented the writing side as well. Here, I will briefly introduce the contents of the sample. Overview In this sample, an image captured by SceneCapture2D is extracted from a TextureRenderTarget, and then displayed on another material via shared memory. First, please open the SharedMemory level. All implementation is within the Box Actor blueprint. Reading Side Implementation Prepare a texture and material to hold the pixel buffer read from shared memory. Generate an instance of ObjectDeliverer for reading shared memory and start the process. The shared memory buffer size is set to the image buffer size (800x450x4 bytes). ...

Editor Utility Widget This time, I tried out the Editor Utility Widget feature, which became available from UE4.22. Using Editor Utility Widget, you can easily create editor extensions with UMG and Blueprints. For a basic explanation of Editor Utility Widget, I referred to Okazu-san’s article. [UE4] About Editor Utility Widget, which allows easy creation of tools and editor extensions that run in the editor using UMG - Qiita What I Made I created a feature where you draw a single continuous line by dragging the mouse on the Editor Utility Widget, and then generate a spline mesh along the drawn line. ...