World/Udon Bugs & Feature Requests

There are many camera settings that would be really nice to have access to after runtime. An interface could be provided for this via some proxy in the VRCGraphics class. (and maybe one for the hand camera as well!) Ideally this proxy would contain everything the normal Camera class has that doesn't pose a security risk. Some examples of very handy use cases for this: Change farclip dynamically to minimize perf overhead from unnecessarily drawing distant avatars/objects Safe access to culling masks for user-created layers to make a lot of common visibility tricks much easier Set depth texture to be generated without needing a shadow-casting dir light Get FOV to use for unique world mechanics Access to a lot of useful camera matrices like cameraToWorldMatrix, worldToCameraMatrix, projectionMatrix, etc... Access to stereo separation for more advanced world features ...and more I'm probably not thinking of!

In addition to the inventory post that already exist, I want to be able to give players items to consume/spawn only usable in my world. For example, if I make a Minecraft-esque world every player would find a starter kit in their inventory with a shovel, axe, torch and pickaxe. When leaving the world the items would disappear. Or a flare gun players can use to find each other on super large worlds. Assuming persistence exists, a tick box would exist on the imaginary item component to either make it disappear on switching world or you keep it forever (Or until consumed?)

If I want to pass a parameter to custom event receiver, even now, I could it by using public program variable and executing SetProgramVariable before SendCustomEvent. Comparing that, for example, OnCollisionEnter event uses implicitly defined variable "onCollisionEnterOther". I think it will be useful and user friendly if parameter passing can be written directly in sender side SendCustomEvent node and receiver side CustomEvent node as a kind of syntax sugar.

Currently, when a user enters the interaction range an interactive game object in a world, VRChat displays a blue halo around it. Udon can control this highlight with InputManager.EnableObjectHighlight , though it's unreliable and undocumented. It turns the highlight on and off, but the game object loses or regains its highlight if the user enters the interaction range. Worlds can work around this by calling EnableObjectHighlight every Update. Udon should be able to control an object's highlight state to a greater extent.

When serializing in VRCJson with JsonExportType set to Minify, the output contains unnecessary whitespace. To save data size, it would be better if no whitespace was included when Minify is specified. var j = new DataDictionary(); j["e1"] = 1; j["e2"] = 2; if (VRCJson.TrySerializeToJson(j, JsonExportType.Minify, out var res)) { Debug.Log(res); } Result: {"e1": 1, "e2": 2}

This might not be possible with the way the nodes work, but a Switch node of some kind would allow easier conditional selection within complex states.

We cannot check whether a GameObject is destroyed or not. To detect an GameObject is destroyed or not, we normally may use (gameObj != null) or (gameObj != null && gameObj.name != "ToDestroy" ) or ReferenceEquals(gameObj , null) Those codes work perfectly in udonSDK3 unity editor environment. However, the same code will throw exception in-game which cause the script stop running. To investigate, we tried to enable UdonSecureHeap in editor and the editor also throw errors, so we guess that Udon's secure heap is what breaking the in-game behavior. The exception message say 'Your script should either check if it is null or you should not destroy the object.' However what I am doing is actually the null-checking!! The following is the error log. I am destroying a 'Cube' and check the cube's status using 'Tester' by showing the result on UnityEngine.UI.Text, which shows "Object is NOT null" or "Object is null" : [UdonBehaviour]An exception occurred during Udon execution, this UdonBehaviour will be halted. VRC.Udon.VM.UdonVMException: The VM encountered an error! Exception Message: An exception occurred during EXTERN to 'UnityEngineObject.__op_Equality__UnityEngineObject_UnityEngineObject__SystemBoolean'. Parameter Addresses: 0x0000000B, 0x00000004, 0x0000000A The object of type 'GameObject' has been destroyed but you are still trying to access it. Your script should either check if it is null or you should not destroy the object. ---------------------- Program Counter was at: 92 ---------------------- Stack Dump: ---------------------- Heap Dump: 0x00000000: 6459115532197657758 0x00000001: Tester 0x00000002: null 0x00000003: Text (UnityEngine.UI.Text) 0x00000004: null 0x00000005: null 0x00000006: Object is null 0x00000007: Object is NOT null [ 0x00000008: ] 0x00000009: 4294967295 0x0000000A: False 0x0000000B: null 0x0000000C: 241 0x0000000D: Cube (UnityEngine.GameObject) 0x0000000E: Object is NOT null [Cube (UnityEngine.GameObject) 0x0000000F: Object is NOT null [Cube (UnityEngine.GameObject) 0x00000010: Object is NOT null [Cube (UnityEngine.GameObject)] 0x00000011: Object is NOT null [Cube (UnityEngine.GameObject)] 0x00000012: 241 0x00000013: Object is NOT null [Cube (UnityEngine.GameObject)]241 0x00000014: 4294967295 0x00000015: UnityEngineObject.__op_Equality__UnityEngineObject_UnityEngineObject__SystemBoolean 0x00000016: UnityEngineTime.__get_frameCount__SystemInt32 0x00000017: SystemInt32.__ToString__SystemString 0x00000018: SystemString.__op_Addition__SystemString_SystemString__SystemString 0x00000019: UnityEngineUIText.__set_text__SystemString__SystemVoid 0x0000001A: UnityEngineGameObject.__ToString__SystemString ---------------------- Inner Exception: ---> VRC.Udon.VM.UdonVMException: An exception occurred during EXTERN to 'UnityEngineObject.__op_Equality__UnityEngineObject_UnityEngineObject__SystemBoolean'. Parameter Addresses: 0x0000000B, 0x00000004, 0x0000000A ---> UnityEngine.MissingReferenceException: The object of type 'GameObject' has been destroyed but you are still trying to access it. Your script should either check if it is null or you should not destroy the object. at (wrapper managed-to-native) UnityEngine.GameObject.get_transform(UnityEngine.GameObject) at VRC.Udon.Security .UnityEngineObjectSecurityBlacklist.IsBlacklisted[T] (T objectToCheck) [0x0008c] in C:\VRChatGit\VRChat-Udon\UdonVM\Udon\Security\Source\UnityEngineObjectSecurityBlacklist.cs:50 at VRC.Udon.ClientBindings.UdonClientInterface.IsBlacklisted[T] (T objectToCheck) [0x00000] in C:\VRChatGit\VRChat-Udon\UdonVM\Udon\ClientBindings\Source\UdonClientInterface.cs:83 at VRC.Udon.UdonManager.IsBlacklisted[T] (T objectToCheck) [0x00001] in E:\Unity Project 2018\Test2018World\Assets\Udon\UdonManager.cs:137 at VRC.Udon.Security .UdonSecureHeap.ScanHeapValue[T] (T& heapValue) [0x0005f] in C:\VRChatGit\VRChat-Udon\UdonVM\Udon\Security\Source\UdonSecureHeap.cs:142 at VRC.Udon.Security .UdonSecureHeap.GetHeapVariable[T] (System.UInt32 address) [0x0000d] in C:\VRChatGit\VRChat-Udon\UdonVM\Udon\Security\Source\UdonSecureHeap.cs:55 at VRC.Udon.Wrapper.Modules.ExternUnityEngineObject.__op_Equality__UnityEngineObject_UnityEngineObject__SystemBoolean (VRC.Udon.Common.Interfaces.IUdonHeap heap, System.UInt32[] parameterAddresses) [0x00000] in C:\VRChatGit\VRChat-Udon\UdonVM\Udon\Wrapper\Source\Modules\UnityEngine\ExternUnityEngineObject.cs:89 at VRC.Udon.VM.UdonVM.Interpret () [0x00272] in C:\VRChatGit\VRChat-Udon\UdonVM\Udon\VM\Source\UdonVM.cs:281 --- End of inner exception stack trace --- at VRC.Udon.VM.UdonVM.Interpret () [0x00326] in C:\VRChatGit\VRChat-Udon\UdonVM\Udon\VM\Source\UdonVM.cs:305 --- End of inner exception stack trace --- at VRC.Udon.VM.UdonVM.Interpret () [0x003f4] in C:\VRChatGit\VRChat-Udon\UdonVM\Udon\VM\Source\UdonVM.cs:346 at VRC.Udon.UdonBehaviour.RunProgram (System.UInt32 entryPoint) [0x0006a] in E:\Unity Project 2018\Test2018World\Assets\Udon\UdonBehaviour.cs:1867 UnityEngine.Debug:LogError(Object, Object) VRC.Core.Logger:LogError(String, Int32, Object) VRC.Udon.UdonBehaviour:RunProgram(UInt32) (at Assets/Udon/UdonBehaviour.cs:1877) VRC.Udon.UdonBehaviour:Update() (at Assets/Udon/UdonBehaviour.cs:762)

This community is very creative and no matter how many resources you put towards building cool tools, you will always lag behind the community's ideas. As such I think having some type of experimental area where world builders can extend the Node Graph without being blacklisted during upload seems like a great way to me to propose new features. Simple text and screenshots in the canny don't seem adequate for me here because you can't test your code, nor can you really illustrate properly what the benefits are. For example, what if you wish to build a PA / microphone system leveraging runtime modifications of the spatial audio parameters? This requires that you test with other players to get it right. And the best way to present the results would be through a demo. Now imagine someone could build a custom node for the Node Graph along the lines of: Set Audio Parameters Audio source Min range Max range ... And you're able to reference player voices as the audio source here, perhaps through a trigger of sorts.

Currently manual sync is significantly faster than object sync and RPCs. This is fine... until you are using manual sync to replicate e.g. a control for a particle effect bound to a held object. We need a way to get these back into sync. Some potential options include: If the object sync latency is fixed, provide a way to obtain this delay so we can apply it to manually synced values. Provide a way to attach synced variables that are transmitted on object synced updates, but do not prevent the object from sleeping when it's not being moved (see https://feedback.vrchat.com/udon-graph-upgrade-closed-testing/p/reliable-sync-feedback-please-add-a-way-to-sleep-a-continuously-synced-object )

In the Udon Graph and Udon Sharp there is currently no documentation. It would be convenient to have direct access to each function's documentation from Unity. Here's an example from UdonSharp, with documentation from https://docs.vrchat.com/docs/player-audio inserted: Current: public void SetVoiceDistanceNear(float near) => VRCPlayerApi._SetVoiceDistanceNear(this, near); Proposed: /// <summary> /// The near radius, in meters, where volume begins to fall off. It is strongly recommended to leave the Near value at zero for realism and effective spatialization for user voices. /// </summary> /// <param name="far">in Meters, Range 0 - 1,000,000</param> public void SetVoiceDistanceFar(float far) => VRCPlayerApi._SetVoiceDistanceFar(this, far); According to the contributors of UdonSharp they cannot add documentation to the libraries themselves (for technical reasons). For completeness sake I've attached an example of what it might look like in the Udon Graph. Though perhaps that should be a separate post.