rendertime_params

[3__]

I'm wondering if there's a way to set rendertime

parameters for sops, namely subdivide divisions

(Eg: current: 1, Render: 3).

this is to avoid having to manually toggle bypass

on various sibdivides in an object before rendering.

-cpb

[TheDunadan]

You can toggle "render poly as subd" in the render tab of your object. This way it'll be always rendered perfectly smooth (and it renders pretty fast really).

Jens

[3__]

yep, but I need to override the divisions

parameter within specific subdivide sops.

breaking up sop networks into separate

objects isn't an option in this case.

-cpb

[puma.snyder]

take a look at pre-render scripts in your output driver and the opparm command. Type "help opparm" in a textport.

To get the necessary info for opparm you could do an opscript on your subdivide sop. Type "help opscript" in a textport.

Hope this gets you started

Achim

[mark]

does this post from Jason help?

I'd consider using a Houdini variable. $SUBDIV_LEVEL or something. You can easily also add aliases to increasing and decreasing this too.

In the Textport:

Director ->  alias low   set subdiv=0
Director ->  alias med   set subdiv=1
Director ->  alias high   set subdiv=2
Director ->  med
Director ->  echo $subdiv
1 
Director ->  high
Director ->  echo $subdiv
2

Hope this helps,

Jason

[deecue]

or you could just do what jason says without the alias'.. just adjust your $SUBDIV value in the variable pane (Alt-A) right before rendering.. that will adjust all params that uses teh $SUBDIV variable...

[3__]

setting a variable and opparm commands are both

working, but I want to have it apply only at render-time,

preferably without creating any file/system dependencies

that prevent moving the hipfile around.

-cpb

[edward]

Have special subdivide sops with only the render flag turned on them?

[3__]

special subdivide sops... ?

Howabout something more generic:

Script fields (not just script-file fields) for pre/post render scripts.

A render option (drop-down list?) to switch to a take at rendertime.

-cpb

[TheUsualAlex]

You can simply type the Hscript commands into the Pre/Post Script in your ROP. You don't always need the hscript files for it. If you need multiple lines, simply use semi-colon ( ; ) to separate the files.

[deecue]

yea, you don't need to make an external file to script something this easy.. just put it right there in your rop...

here, i made an example file for you.. i made a variable called SUBDIV in the alias/variable pane (Alt-A).. i set my subdiv param in my subdivide sop to $SUBDIV.. then go check out my rop and under the scripts tab..

for pre-render i have:

set -g SUBDIV = 3; varchange

for post-render i have:

set -g SUBDIV = 0; varchange

You don't need the -g unless you are dealing with variables made in the alias/variable pane. since mine was, i used the -g (meaning force global variable)...

the varchange is there to recook my sops that use variables.. from the docs:

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

When a variable value changes, the OPs which reference that variable are not automatically cooked. Running the varchange command causes all OPs which use a variable that has changed to be re-cooked.

::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::

if i didn't recook them, you would never see your subdivide update during or after render.

hth,

dave

http://studentpages.scad.edu/~dquiru20/ren...endersubdiv.hip

[edward]

What I meant was you just have a different subdivide sop for rendering. Let's say you have two levels of detail, a level 1 subd for display purposes and then a level 3 for rendering.

Then it's done trivially as:

- One subdivide that is level 1. Set the display flag on this

- Append to it, another subdivide. Set this to level 2. With the previous subdivide, the geometry is subdivided 3 levels. Set the render flag on this.

[3__]

excellent, thanks everyone.

I had tried it without varchange but now it works.

also it seems the variables have some odd case-sensitivity;

setting them can be done in lowercase via textport but they

must be in uppercase in the rop. a bug?

-cpb

[deecue]

lowercase should be fine in textport, variable pane, sop parameter, and rop.. you can even have two different case sensitive variables at the same time..

i.e. i can add 'subdiv' to my variables along with 'SUBDIV' and everything will recognize them as two seperate variables..