Advanced Locomotion System V4 on C++

Performance optimized & replicated C++ port of Advanced Locomotion System V4 for Unreal Engine 4.25 with additional bug fixes.

Features

• Converted into plugin structure (by AHGS-Jens). You can immediately start using it in your project without doing any serious change in your project configuration.
• Source code is highly optimized while being ported from blueprints. For 100 characters in a scene, CPU time is decreased from ~17ms to ~10ms.
• Currently, only Windows & Linux are supported, and tested.
• Network performance optimized, and comes with full replication support (Big kudos to senfkorn92 for his work). ALSV4_CPP currently beats ALS V3 and other BP based V4 replication implementations on network performance:

Advanced Locomotion System V3 (BP):
Total outgoing bandwidth is 686KB over 60 seconds (30 seconds playing server, 30 on client).
Character Actor Data sent over network - 43KB
'ReplicatedMovement' Data sent over network - 19KB
Highest RPC Data sent over network - 90KB
Overall Property Size - 46KB
Overall RPC Size - 201KB

Advanced Locomotion System V4 (BP):
Total outgoing bandwidth is  2.7MB over 60 seconds (30 seconds playing server, 30 on client).
Character Actor Data sent over network - 116KB
'ReplicatedMovement' Data sent over network - 45KB
Highest RPC Data sent over network - 536KB
Overall Property Size - 209KB
Overall RPC Size - 1.7MB

Advanced Locomotion System V4 (C++):
Total outgoing bandwidth is 618KB over 60 seconds (30 seconds playing server, 30 on client).
Character Actor Data sent over network - 38KB
'ReplicatedMovement' Data sent over network - 14KB
Highest RPC Data sent over network - 48KB
Overall Property Size - 41.1KB
Overall RPC Size - 91.1KB

Netprofiler benchmark by @Scragnog

Setting Up The Plugin

• Clone the repository inside your project's Plugins folder, or download the source code zip file for latest release and extract it into your project's Plugins folder.
• Put Config/DefaultInput.ini from the plugin folder inside your project's config folder. If your project already have this .ini file, merge it into yours.
• Add the lines below into your DefaultEngine.ini, below [/Script/Engine.CollisionProfile] tag (Create the tag if it doesn't exist):

+Profiles=(Name="ALS_Character",CollisionEnabled=QueryAndPhysics,bCanModify=True,ObjectTypeName="Pawn",CustomResponses=((Channel="Visibility",Response=ECR_Ignore),(Channel="Camera",Response=ECR_Ignore),(Channel="Climbable",Response=ECR_Ignore)),HelpMessage="Custom collision settings for the capsule in the ALS_BaseCharacter.")
+DefaultChannelResponses=(Channel=ECC_GameTraceChannel2,DefaultResponse=ECR_Block,bTraceType=True,bStaticObject=False,Name="Climbable")

• Generate Visual Studio Project files, and compile your project. (Unreal Engine 4.25.2 & 4.25.3 update broke compiling distribution binaries for plugins, so you need to compile them yourself)
• Launch the project, and enable plugin content viewer as seen below. This will show contents of the ALS in your content browser:
• If you're getting problems with the plugin binaries, try compiling them yourself from the source.

License & Contribution

Source code of the plugin is licensed under MIT license, and other developers are encouraged to fork the repository, open issues & pull requests to help the development.