Custom Object Sync

Sync objects across the network with custom range, precision, and parameter usage.

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📦 Add to VRChat Creator Companion

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How it works

• Contacts and Physbones read the location and rotation of your object(s).
• Parameter Drivers convert this location and rotation into boolean values.
• Those boolean values are synced over the network in multiple steps. Choosing more steps means we can use fewer parameters.
• Once the values arrive at the remote side, they get converted back into floats.
• These floats get used to set the object back in its place on the remote side.
• This can be useful when:
  • You want to late sync a world drop.
  • You want to fly an object around and have it sync reliably.
  • You have an object that moves based on some local-only/fps dependent mechanism.

Install guide

2024-05-02.20-44-41-1.mp4

• Click VRLabs -> Custom Object Sync at the top of the screen.
• Drag the object you want to sync into the Objects to Sync field.
• Adjust the values until you're happy with them:
  • Add Local Debug View: Adds a toggle to view the object's remote position and rotation.
  • Quick Sync:
    • Position Precision: The position precision to be synced. Since this sync mode syncs floats, Position Precision also affects Range, and Rotation Precision is locked at 1 float per axis.
  • Non Quick Sync:
    • Position Precision: Precision of the synced object's Position.
    • Rotation Precision: Precision of the synced object's Rotation.
    • Radius: Radius of the sync. For more information, see Sync Type
    • Bits per Sync: Amount of bits per sync step. Lower bits means longer before the full object is synced, but also less parameter usage.
  • Enable Rotation Sync: Whether or not rotation should be Synced.
  • Sync Type: Whether or not the sync should be based on avatar root or on world origin.
    • Avatar Centered: The sync is based off of a point which is dropped when-ever you start the sync. This means you can use way lower range, but also it won't late sync.
      • This is forced for quick sync.
    • World Centered: The sync is based off of world origin. This means you'll need a big range to support big worlds, but it will late sync.
  • Add Damping Constraint to Object: Whether or not the remote object should be damped. This means the object moves to its new position smoothly whenever it receives a new position.
    • Damping value: How the damping behaves: 0 = don't move at all. 1 = move to the new position very fast.
• Press Generate Custom Sync

Note

When building for Quest, you will have to remove unsupported components and shaders

How to use

• Enable the CustomObjectSync/Enabled bool to start the sync.
• Now the location of the Target objects will be synced over the network.

Performance stats

Rotation Sync:

Constraints:            11-13 + 3 per object 
Contact Receivers:      6
Contact Senders:        3
FX Animator Layers:     2 + 2 per object
Phys Bones:             6
Phys Bone Colliders:    3
Rigidbodies:            1
Joints:                 1
Expression Parameters:  1-256

No Rotation Sync:

Constraints:            11-13 + 3 per object 
Contact Receivers:      6
Contact Senders:        3
FX Animator Layers:     2 + 1 per object
Rigidbodies:            1
Joints:                 1
Expression Parameters:  1-256

Hierarchy layout

Rotation Sync:

Custom Object Sync
|-Target
|-Measure
|  |-Position
|  |  |-SenderX
|  |  |-SenderY
|  |  |-SenderZ
|  |  |-Receiver X+
|  |  |-Receiver X-
|  |  |-Receiver Y+
|  |  |-Receiver Y-
|  |  |-Receiver Z+
|  |  |-Receiver Z-
|  |-Rotation
|  |  |-Measure Bones
|  |  |  |-Measure X Magnitude
|  |  |  |-Measure X Sign
|  |  |  |-Measure Y Magnitude
|  |  |  |-Measure Y Sign
|  |  |  |-Measure Z Magnitude
|  |  |  |-Measure Z Sign
|  |  |-Measure Planes
|  |  |  |-X Angle Plane
|  |  |  |-Y Angle Plane
|  |  |  |-Z Angle Plane
|-Set
|  |-Result

No Rotation Sync:

Custom Object Sync
|-Target
|-Measure
|  |-Position
|  |  |-SenderX
|  |  |-SenderY
|  |  |-SenderZ
|  |  |-Receiver X+
|  |  |-Receiver X-
|  |  |-Receiver Y+
|  |  |-Receiver Y-
|  |  |-Receiver Z+
|  |  |-Receiver Z-
|-Set
|  |-Result

Contributors

• jellejurre

License

Custom Object Sync is available as-is under MIT. For more information see LICENSE.

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