Multi line expressions in python/hscript

[siddd]

Hey all,

I was wondering if anyone might be able to give me a quick pointer on how to write expressions that have multiple lines of code in them inside Houdini. I basically just want to do the following (simplified version)

dist = distance(0,0,0, $TX, $TY, $TZ)
div = dist / 5

/obj/meshing/attribcreate1/value1 = div

And that's it! Does anyone know the correct python and hscript syntax for this?

Cheers,

Sid

(Total n00b)

[symek]

{
float dist = distance(0,0,0, $TX, $TY, $TZ);
float div = dist / 5;
return div;
}

in AttributeCreate/value1 parm. In case of Python expression, open expr. editor (Alt+E) and put the code as it be a body of a function.

Edited August 5, 2010 by SYmek

[hopbin9]

Thanks, that was a cool tip that I didn't know.

[katisss]

How can i do this with python?

Easy by using the expresion editor but my

pre render script has some lines i want to set there from my farm rop module...

Ah by the way is pre render script expected to run before idf file generation?

Edited March 8, 2011 by katisss

[hopbin9]

That I do is use the expression editor in the "edit / Aliases and Variables" to create a function, and then call that function.

If your expression is more then one line this is a lot easier to manage, and you can re-use it elsewhere.

[katisss]

Expression editor is probably not an option, no way of putting multiline python?

Another person sets the rops and the farm rop is only managing the renders...

That I do is use the expression editor in the "edit / Aliases and Variables" to create a function, and then call that function.

If your expression is more then one line this is a lot easier to manage, and you can re-use it elsewhere.

Edited March 8, 2011 by katisss

[hopbin9]

I'm still using hscript so I haven't tried python in the editor, but maybe if you switch the default language to python it will work.

Also, the manual says you can enter multiline python expressions using the editor (alt+e).

http://www.sidefx.com/docs/houdini11.0/hom/expressions

[katisss]

hi,

the python editor works great it puts a tab sign in the result (like mircosoft word )...

I just need to do it from python.