World/Udon Bugs & Feature Requests

Components sometimes "break" in Unity 2022. They are collapsed, and expanding them reveals nothing. It affects different types of components, i.e. UdonBehaviours or MeshRenderers. It can be fixed by selecting a different game GameObject. In my world projects, it's caused by the following error: ArgumentNullException: Value cannot be null. Parameter name: unityObject VRC.Udon.Serialization.OdinSerializer.UnitySerializationUtility.SerializeUnityObject (UnityEngine.Object unityObject, VRC.Udon.Serialization.OdinSerializer.SerializationData& data, System.Boolean serializeUnityFields, VRC.Udon.Serialization.OdinSerializer.SerializationContext context) (at ./Packages/com.vrchat.worlds/Runtime/Udon/Serialization/OdinSerializer/Unity Integration/UnitySerializationUtility.cs:1031) UdonSharp.UdonSharpBehaviour.UnityEngine.ISerializationCallbackReceiver.OnBeforeSerialize () (at ./Packages/com.vrchat.worlds/Integrations/UdonSharp/Runtime/UdonSharpBehaviour.cs:272) UnityEditor.EditorApplication:Internal_CallGlobalEventHandler()

I have encountered a problem related to Unity's DSP chain and Udon. I am planning to create an audio focused world, where I need to implement a custom DSP algorithm on audio that can respond to player behavior/controls in real-time. In the native Unity Mono framework, I can insert custom effects into the audio DSP chain by implementing the OnAudioFilterRead method in MonoBehaviour (see https://docs.unity3d.com/ScriptReference/MonoBehaviour.OnAudioFilterRead.html ). In the UdonSharp documentation, I found that there is a method stub for OnAudioFilterRead in Unity events (see https://udonsharp.docs.vrchat.com/events/ ), so I should be able to implement it. However, it does not work in my Unity setup. I also saw a post on Canny mentioning that a component called OnAudioFilterReadProxy should be automatically added to the object if OnAudioFilterRead is implemented (See: https://vrchat.canny.io/udon/p/order-of-onaudiofilterreadproxy ), but this is not happening on my end. Any idea what could be going wrong with my script or configuration? Or it is a bug? My test code is like the following: using UdonSharp; using UnityEngine; using VRC.SDKBase; using VRC.Udon; public class SimpleSineGenerator : UdonSharpBehaviour { [SerializeField, Range(0, 1)] private float amplitude = 0.5f; [SerializeField] private float frequency = 261.62f; private double phase = 0; private double sampleRate = 48000; public void Update() { // verify that the script is running transform.Rotate(Vector3.up, 90f * Time.deltaTime); } public void OnAudioFilterRead(float[] data, int channels) { // DSP code double phaseIncrement = 2 * Mathf.PI * frequency / sampleRate; for (int i = 0; i < data.Length; i += channels) { phase += phaseIncrement; if (phase > 2 * Mathf.PI) { phase -= 2 * Mathf.PI; } float value = amplitude * Mathf.Sin((float)phase); for (int j = 0; j < channels; j++) { data[i + j] = value; } } } }

If you use VRCPlayerApi.SetVoiceDistanceFar() or VRCPlayerApi.SetVoiceDistanceNear() The the value seems to get clamped to a maximum of 10000. I would like the maximum range to be as high as possible for stuff like aircraft radios.

Calling GetComponent on a GameObject that has a child with a VRCStation component attached throws the following error: [UdonSharp] Packages/com.vrchat.worlds/Integrations/UdonSharp/Runtime/Libraries/CompilerInternal/GetComponentShim.cs(25,30): Udon runtime exception detected! An exception occurred during EXTERN to 'VRCUdonCommonInterfacesIUdonEventReceiver.__GetProgramVariableType__SystemString__SystemType'. Object reference not set to an instance of an object

On Later-Joiner's client, OnVariableChanged can be fired without OnDeserialization() before OnEnable() and Start() . It will be happened especially if the object owner uses RequestSerialization() frequently (such as per second interval synchronization). It can be critical problem because it makes OnEnable() and Start() are not guaranteed before synced variable changes: firing OnVariableChanged before Start() can breaks Udons that implementing initialization at Start() . This bug seems the reoccurrence of following this Canny: https://feedback.vrchat.com/udon/p/1259-synced-variables-can-be-changed-from-owners-requestserialization-before-lat Build: 1539 ---- I've made the new testing world to check event orders: https://vrchat.com/home/world/wrld_c357c8f1-1d22-4e91-bfdc-e72c04097fe1/info . (Sample screenshot is attached below) Reproduction steps: Make the instance of the world (Player A), join the instance then enable interval sync from "Toggle Sync Interval" buton. (It starts 0.25s interval of synced int increment using manual sync) Join another player to its instance (Player B). See the console UI in the world at Player B. Expected Results: At Player B console UI, "SyncInt change" console message should only be occured before "OnEnable". Actual Results: At Player B console UI, there is small chance to occur "SyncInt change" console message before "OnEnable". - It may sometimes not be occurred, so try re-joining several times.

Test world here: wrld_9e27c160-fd8d-41f4-a614-0baed9daa821 Enter with 2 clients, and have one of them hold a torch inside the white cube. Look at the debug console, you should see that the client holding the torch sees OnTriggerEnter when the torch is first put in, and OnTriggerExit when the torch is moved out. The other client will see OnTriggerEnter and OnTriggerExit spamming up their console.

Issue: Using Udon Sharp's VRCStringDownloader.LoadUrl() to attempt to download a text file larger than String Loading 's maximum file size restriction of 100 MB triggers OnStringLoadError() with the HTTP error code 200 OK and the message Unable to write data. . Suggestion: I think it should be changed to the HTTP error code 413 Content Too Large and the message Text file is too large. to make it clearer, since 200 OK is meant to be used for successful responses.

The Scale method on Vector classes is intended to scale each component of a vector by the respective component of another vector, and apply the result to the vector whose method was called. This method does not seem to be functioning in Udon. This issue affects all Vector types. Below is a code snippet demonstrating the issue, along with the expected and actual log outputs. Version info: Unity 2022.3.22f1 VRChat SDK - Base 3.10.3 VRChat SDK - Worlds 3.10.3 Vector3Scale.cs: void Start() { var v2ScaleTest = new Vector2(1, 2); v2ScaleTest.Scale(new Vector2(10, 20)); Debug.Log($"Vector2(1, 2, 3).Scale(10, 20, 30) = {v2ScaleTest}"); var v2IntScaleTest = new Vector2Int(1, 2); v2IntScaleTest.Scale(new Vector2Int(10, 20)); Debug.Log($"Vector2Int(1, 2, 3).Scale(10, 20, 30) = {v2IntScaleTest}"); var v3ScaleTest = new Vector3(1, 2, 3); v3ScaleTest.Scale(new Vector3(10, 20, 30)); Debug.Log($"Vector3(1, 2, 3).Scale(10, 20, 30) = {v3ScaleTest}"); var v3IntScaleTest = new Vector3Int(1, 2, 3); v3IntScaleTest.Scale(new Vector3Int(10, 20, 30)); Debug.Log($"Vector3Int(1, 2, 3).Scale(10, 20, 30) = {v3IntScaleTest}"); var v4ScaleTest = new Vector4(1, 2, 3, 4); v4ScaleTest.Scale(new Vector4(10, 20, 30, 40)); Debug.Log($"Vector4(1, 2, 3, 4).Scale(10, 20, 30, 40) = {v4ScaleTest}"); } Output when executed as C#: Vector2(1, 2, 3).Scale(10, 20, 30) = (10.00, 40.00) Vector2Int(1, 2, 3).Scale(10, 20, 30) = (10, 40) Vector3(1, 2, 3).Scale(10, 20, 30) = (10.00, 40.00, 90.00) Vector3Int(1, 2, 3).Scale(10, 20, 30) = (10, 40, 90) Vector4(1, 2, 3, 4).Scale(10, 20, 30, 40) = (10.00, 40.00, 90.00, 160.00) Output when executed as U#: Vector2(1, 2, 3).Scale(10, 20, 30) = (1.00, 2.00) Vector2Int(1, 2, 3).Scale(10, 20, 30) = (1, 2) Vector3(1, 2, 3).Scale(10, 20, 30) = (1.00, 2.00, 3.00) Vector3Int(1, 2, 3).Scale(10, 20, 30) = (1, 2, 3) Vector3Int(1, 2, 3).Scale(10, 20, 30) = (1, 2, 3) Vector4(1, 2, 3, 4).Scale(10, 20, 30, 40) = (1.00, 2.00, 3.00, 4.00)

When calling PlayHapticEventInHand, there is no way to provide the frequency to play the haptics at, it's always the same frequency. While it makes sense for general purpose use to not expose this, for specialised use cases not exposing the frequency prevents building some fun toys and scripts. Some way to explicitly set frequency, perhaps with a different call or an optional parameter or something, would be extremely useful here. There's also the fact that as the frequency is ignored in PlayHapticEventInHand, it's a little misleading and confusing to use, but I can understand the backwards compatibility issue. Some better way to reconcile this though would be useful.

% operator (Remainder operator) is not exposed to Udon. This makes some operations impossible! I can't believe that this has been neglected since 2020. (I know https://feedback.vrchat.com/udon/p/long-remainder but it has been neglected since 2020 so I created new issue.)