Menu

© 2025 ういやまラボ

BLOGTOOLSPRODUCTNOTES

    VRChat Technical Notes

    UdonSharp notes for VRChat world creation

    What is UdonSharp? Understanding the Core of VRChat World Creation

    Setup2025-12-19

    A scripting language for adding interactive features to VRChat worlds. An introductory guide covering the relationship with Udon VM, how it works, and what you can achieve.

    Setting Up the UdonSharp Development Environment: From VCC Setup to Creating an Interact Object

    Setup2025-12-19

    Step-by-step guide for setting up an UdonSharp project using VRChat Creator Companion (VCC). From Unity installation to creating an interactive object in a practical format.

    Complete Guide to C# Features and Limitations in UdonSharp

    Syntax2025-12-19

    A comprehensive list of C# features available in UdonSharp development and limitations imposed by the Udon VM. Covering variables, control structures, methods, and unsupported features like generics and interfaces.

    UdonSharp Lifecycle: Understanding Start, Update, and Interact

    Syntax2025-12-19

    The event system that controls script execution timing. Learn the roles and implementation patterns of major lifecycle events including Start, Update, and Interact.

    Variables and Data Types in UdonSharp: Basics of int, float, and GameObject

    Syntax2025-12-19

    The fundamentals of UdonSharp programming: variables and data types. From basic types (int, float, bool, string) to Unity types (Vector3, GameObject, Transform) explained with examples.

    Mastering User Input Detection: Utilizing Interact and Input Events

    Syntax2025-12-19

    Input detection methods for player interaction with worlds. Learn implementation patterns for Interact events, VRChat Input Events, and keyboard/VR controller input.

    Methods and Custom Events: Script Communication with SendCustomEvent

    Networking2025-12-19

    Code reuse and inter-script communication methods. Learn method definitions, SendCustomEvent, SendCustomNetworkEvent, and delayed execution (SendCustomEventDelayedSeconds).

    Leveraging Attributes: Using UdonSynced, Header, and Range

    Networking2025-12-19

    A list and usage guide for attributes available in UdonSharp. Synchronization with [UdonSynced], Inspector organization with [Header][Tooltip][Range], and improving development efficiency.

    Introduction to Network Synchronization: Understanding Ownership and UdonSynced

    Networking2025-12-19

    The fundamentals of network synchronization at the core of VRChat multiplayer. Object ownership, [UdonSynced] variables, and the mechanism of data sharing through RequestSerialization.

    Complete Guide to Player Events: Detecting Join, Leave, and Respawn

    Networking2025-12-19

    Events for detecting player state changes in worlds. Implementation methods for OnPlayerJoined/Left, OnPlayerRespawn, OnAvatarChanged, and pickup-related events.

    Creating Door Gimmicks: Synced Automatic and Manual Door Implementation

    Gimmicks2025-12-19

    Implementation methods for doors as fundamental dynamic objects. Automatic doors that open when approached, manual doors that open/close on click, animation integration and network synchronization.

    Introduction to Pickup Objects: Creating Grabbable and Usable Items

    Gimmicks2025-12-19

    Implementing items that players can pick up and manipulate. VRCPickup component, OnPickup/OnDrop/OnPickupUseDown events, and state synchronization methods.

    Implementing Stations: Chairs, Vehicles, and Sittable Objects

    Gimmicks2025-12-19

    Implementing functionality to seat players at fixed positions. VRCStation component setup, enter/exit events, and application to vehicles.

    Optimization with VRCObjectPool: Managing Bullet and Effect Creation

    Gimmicks2025-12-19

    Object pooling to prevent performance degradation from frequent object creation/destruction. How to use the VRCObjectPool component and implementation patterns.

    Creating a Mirror System: ON/OFF Toggle and Quality Settings

    Gimmicks2025-12-19

    Essential mirror control methods for VRChat worlds. VRCMirrorReflection on/off toggle, Reflect Layers, and quality preset implementation via resolution.

    Creating Teleporters: How to Instantly Move Players

    Gimmicks2025-12-19

    Implementation of teleporters and portals for comfortable world navigation. From basic teleportation using VRCPlayerApi.TeleportTo to portals with synced visuals.

    Implementing Synced Buttons: Local, Toggle, and One-Time Patterns

    Gimmicks2025-12-19

    A collection of button implementation patterns for world creation. How to create local buttons, toggle switches synced across all players, and one-time-only buttons.

    Debugging and Testing Basics: Using Debug.Log and ClientSim

    Advanced2025-12-19

    Problem-solving and quality improvement techniques in UdonSharp development. Best practices for utilizing Debug.Log, multiplayer testing with ClientSim, and creating debug UIs.

    Performance Optimization: Reducing Update Calls and Network Load

    Advanced2025-12-19

    Optimization techniques for comfortable VRChat worlds. Drawbacks of Update overuse, event-driven design, object pooling, and methods for efficient network synchronization.

    Arrays and Data Structures: Design Techniques Without List/Dictionary

    Advanced2025-12-19

    How to use arrays for efficiently managing multiple data. Alternative implementations for List and Dictionary in an environment without generics support, and considerations for [UdonSynced] arrays.