Payload not loaded when parent prim is activated

[mgland]

Description of Issue

Hi there,
When a deactivated prim-A got a payload, whose child prim B also got one, then activating the prim-A won't load the child B's payload, despite the fact that the stage is loaded with LoadAll flag.
The payload of prim-A is loaded through.

This will cause the fact that when LayerDidChange event is emitted, the payload of child prim B is not loaded yet, thus the data will be missed during the event handling.

I saw a related issue: #156
Cheers,
Miguel Gao

Steps to Reproduce

1. Create a usda file called bootstrap.usda:

#usda 1.0
(
    defaultPrim = "shot"
)

def Xform "shot" (
)
{
    def Xform "camera" (
    )
    {
        def Xform "cache"(
            active = false
            payload = @cache_payload.usda@
        ){
            def "cam"(
                payload = @camera_cache.usda@
            ){
            }
        }
    }
}

2. Create a file called cache_payload.usda:

#usda 1.0
(
    defaultPrim = "cam_extra"
)

def "cam_extra" (
)
{
    // Some heavy data goes here...
    def "cache_payload"(){}
}

3. Create a file called camera_cache.usda:

#usda 1.0
(
    defaultPrim = "cam"
)

def Xform "cam" (
)
{
    // Some heavy data goes here...
    def "cam_payload"(){}
}

4. Put all three files within same folder, run python code to test:

from pxr import Usd
stage = Usd.Stage.Open('/path/to/bootstrap.usda', Usd.Stage.LoadAll)
stage.SetEditTarget(stage.GetSessionLayer())
cachePrim = stage.GetPrimAtPath('/shot/camera/cache')
cachePrim.SetActive(True)
cachePayloadPrim = stage.GetPrimAtPath('/shot/camera/cache/cache_payload')
print 'The payload for cache is loaded: %s' % cachePayloadPrim.IsValid()
cameraPayloadPrim = stage.GetPrimAtPath('/shot/camera/cache/cam/cam_payload')
print 'The payload for cam is loaded: %s' % cameraPayloadPrim.IsValid()  # This is the problem
cachePrim.Load()
cameraPayloadPrim = stage.GetPrimAtPath('/shot/camera/cache/cam/cam_payload')
print 'The payload for cam is loaded after manually calling Load(): %s' % cameraPayloadPrim.IsValid()

System Information (OS, Hardware)

Linux, CentOS 7

Package Versions

0.8.5

Build Flags

[spiffmon]

I can reproduce - thanks for reporting this, Miguel - we'll get on it!

…

--spiff

On Sun, Aug 26, 2018 at 1:20 AM Miguel Gao ***@***.***> wrote: Description of Issue Hi there, When a deactivated prim-A got a payload, whose child prim B also got one, then activating the prim-A won't load the child B's payload, despite the fact that the stage is loaded with LoadAll flag. The payload of prim-A is loaded through. This will cause the fact that when LayerDidChange event is emitted, the payload of child prim B is not loaded yet, thus the data will be missed during the event handling. I saw a related issue: #156 <#156> Cheers, Miguel Gao Steps to Reproduce 1. Create a usda file called bootstrap.usda: #usda 1.0 ( defaultPrim = "shot" ) def Xform "shot" ( ) { def Xform "camera" ( ) { def Xform "cache"( active = false payload = @cache_payload.usda@ ){ def "cam"( payload = @camera_cache.usda@ ){ } } } } 1. Create a file called cache_payload.usda: #usda 1.0 ( defaultPrim = "cam_extra" ) def "cam_extra" ( ) { // Some heavy data goes here... def "cache_payload"(){} } 1. Create a file called camera_cache.usda: #usda 1.0 ( defaultPrim = "cam" ) def Xform "cam" ( ) { // Some heavy data goes here... def "cam_payload"(){} } 1. Put all three files within same folder, run python code to test: from pxr import Usd stage = Usd.Stage.Open('/path/to/bootstrap.usda', Usd.Stage.LoadAll) stage.SetEditTarget(stage.GetSessionLayer()) cachePrim = stage.GetPrimAtPath('/shot/camera/cache') cachePrim.SetActive(True) cachePayloadPrim = stage.GetPrimAtPath('/shot/camera/cache/cache_payload') print 'The payload for cache is loaded: %s' % cachePayloadPrim.IsValid() cameraPayloadPrim = stage.GetPrimAtPath('/shot/camera/cache/cam/cam_payload') print 'The payload for cam is loaded: %s' % cameraPayloadPrim.IsValid() # This is the problem cachePrim.Load() cameraPayloadPrim = stage.GetPrimAtPath('/shot/camera/cache/cam/cam_payload') print 'The payload for cam is loaded after manually calling Load(): %s' % cameraPayloadPrim.IsValid() System Information (OS, Hardware) Linux, CentOS 7 Package Versions 0.8.5 Build Flags — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#604>, or mute the thread <https:/notifications/unsubscribe-auth/AF7qaG0DVNwF-IiTlZd0ZrdDfART1Uxkks5uUlpMgaJpZM4WMseE> .

[jtran56]

Filed as internal issue #USD-4712.