Included purposes and non-storm hydra delegates

Community Hydra
1

Hello,

It looks like in 22.05 that changing the included purposes to have a “smaller set” doesn’t trigger Sync() anywhere. I.e. if I turn on “render”, my “render” prims get Synced(), but I can’t remove/turnoff “render” and get any way of handling that.

Storm seems to handle it in _Execute() on a pass by dealing only with DrawItems. But embree (and I think prman, but haven’t verified) don’t issue stuff through Hgi so don’t have the opportunity to not draw something.

Is there a recommended way of handling that ?

Even if there was a “please re-think the whole thing” kind of “forceReSync” might be ok.

2

Sending over to the Hydra category for visibility…

3

By managing Rprims downstream visibility (ie to your renderer), you can make DrawItems in the Rprim::Sync() and then manage to get things the same-ish way that Storm does - ie in the Pass.

But if you are keeping persistent state in your renderer instead of drawing them each time your Pass happens, you have to make sure you re-enable stuff if the purpose turns back on. So it still feels very different than the rest of hydra sync’ing.