Mantra loop rendering

[zaren 1]

Hi all!

It is possible to render in loop?

For example I wrote some post render script which start mantra again. But I got warning - Recursion in parm callback.

This is Mantra1/postrender script:

i = hou.parm("/obj/control/num").eval()
i+= 1
if i < 10: 
    hou.parm("/obj/control/num").set(i)
    hou.parm("/out/Mantra1/execute").pressButton()

/obj/control/num is for to switch geometry. I want to switch geometry and render it. In this case I have 10 : /obj/geometry0 ... /obj/geometry10

If I press button Render - Mantra1 start once.

Script executed successes but last string. It seems merely ignored.

After render first frame script is started but without continue.

Thanx,

Sergiy

Edited July 7, 2012 by zaren

[mawi 82]

Hi all!

It is possible to render in loop?

For example I wrote some post render script which start mantra again. But I got warning - Recursion in parm callback.

This is Mantra1/postrender script:

i = hou.parm("/obj/control/num").eval()
i+= 1
if i < 10: 
    hou.parm("/obj/control/num").set(i)
    hou.parm("/out/Mantra1/execute").pressButton()

/obj/control/num is for to switch geometry. I want to switch geometry and render it. In this case I have 10 : /obj/geometry0 ... /obj/geometry10

If I press button Render - Mantra1 start once.

Script executed successes but last string. It seems merely ignored.

After render first frame script is started but without continue.

Thanx,

Take a look at the wedge ROP, it renders a ROP node n-times and can update parameters for each itteration.

There is a old video about it on the sidefx.com tutorials pages.

Edited July 7, 2012 by mawi

[strages 0]

really nice to find this thing so easily, making use of this right now

[Shalinar 2]

Bump. Wedge ROP is not good enough for what I need. I'm building out a whole custom ROP loop node set, like the For Loop in SOPs. But every way I try to get a parm to re-execute a button's callback script, I get the "Recursion in parm callback" error. Which is annoying, because I know there's a recursion in the parm callback. That's exactly what I want lol. Is there any way around this?

EDIT: I suppose one way would be the Shell ROP, but I'd rather do it all through Python than having extra nodes laying around in my ROP loop.

Thanks,

 

~Chris

Edited January 13, 2017 by Shalinar