Coding Examples

1. Armature & Rigging Example (Blender to Unity)

Blender Armature Setup (Basic Workflow)

Open Blender and create or import your model.
Press Shift + A → Add Armature (Single Bone).
Select your model → Go to Modifiers → Add Armature Modifier.
Select the armature and go to Pose Mode.
Use Weight Paint Mode to assign bone influences to the mesh.
Export as .FBX (Check “Apply Transform” and “Include Armature”).

Unity Setup for VRChat

Import your .FBX file into Unity.
Select the model and set Rig → Humanoid (for avatars) or Generic (for props).
Check bone assignments using Unity's Avatar Configuration.
Your armature is now ready for animations!

2. Animation Example (Basic Idle Animation in Unity)

Step 1: Create an Animation in Unity

Open Unity, select your avatar/prop, and open the Animation window.
Click Create New Animation → Save as “Idle_Animation”.
Add keyframes to create movement (Example: Slight head bobbing for an idle effect).

Step 2: Control Animation with Animator Controller

Go to Window → Animator and create a new Animator Controller.
Assign the Idle_Animation to a State inside the Animator.
Set it as the Default State (So the avatar/prop plays it automatically).

Step 3: Adding Animation to VRChat

For avatars, assign the Animator Controller inside the VRC Avatar Descriptor.
For worlds or props, use VRC Animator Locomotion Control and Triggers.

3. Example: Toggle a Prop Using VRChat Animation Parameters

Scenario: Add a Toggleable Hat to Your Avatar

In Unity, create a Hat object under your avatar's Hierarchy.
Set the Hat’s default state to "Disabled" (Uncheck Active in the Inspector).
Open VRChat SDK → Expressions Menu and create a New Parameter:
- Name: HatToggle
- Type: Bool (True = Visible, False = Hidden)
Inside the Animator, add two states:
- Hat_On (Hat Active)
- Hat_Off (Hat Hidden)
Add a Boolean Condition in the Animator:
- If HatToggle = True → Switch to Hat_On
- If HatToggle = False → Switch to Hat_Off
Now, in VRChat, when you toggle HatToggle, the hat will appear/disappear!

4. Udon Example (Interactive Button in a VRChat World)

Scenario: A Button That Opens a Door

Step 1: Create the Button & Door in Unity

Create a Cube (this will be the button).
Create a Door object (another Cube).
Attach a Collider to the button and set it as Trigger.

Step 2: Add Udon Script (Using UdonSharp for C# Users)

Arcane_Fairy, Unity Toggle Code, 2025

Step 3: Attach Script to Button in Unity

Add an Udon Behavior Component to the Button.
Attach the DoorToggle UdonSharp Script.
Assign the Door object inside the Inspector.

Step 4: Upload to VRChat & Test!

Now, when you press the button in VRChat, the door will open and close! 🚪🎉

OVERALL

✅ Armatures → Give movement to avatars & props using bones.

✅ Animations → Control movement, expressions, toggles using Unity Animator.

✅ Props → Use colliders, rigidbodies, and VRC Pickup scripts to make them interactive.

✅ Coding (Udon/UdonSharp) → Enables interactivity like buttons, doors, games, and custom interactions.

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