[Sidefx-houdini-list] Offset channel expression

Sean Lewkiw seanl at rainmaker.com
Wed Jan 23 13:39:11 EST 2008


chf("/obj/null1/xform1/tx", $F + 4)


Larry Giunta wrote:
> Hey Peter,
>
> I'm trying to offset a bunch of referenced channels
>
> So, for example, in the TX of a translate sop named "xform2", I'd put
> ch("/obj/null1/xform1/tx")
>
> So I'd like to append something to that reference to offset it by x  
> number of frames.
>
> Similar to if I wanted to shift the whole curve up in value by 4, I  
> could
> ch("/obj/null1/xform1/tx") + 4
>
> But I want to shift the curve in time here.
>
> I hope that makes sense. But it probably is something very simple I'm  
> missing.
>
> Thanks
>
>
>
>
> On Jan 23, 2008, at 12:56 PM, Peter Robbinson wrote:
>
>   
>> Hi,
>>
>> Don't you just add or subtract your offset from $F?
>>
>> $F+n
>>
>> PeterR
>>
>> Larry Giunta wrote:
>>     
>>> Is there a way I can shift or offset ( by  x number of frames ) a
>>> referenced channel in SOPs with some type of expression.
>>>
>>> I know I can do this with Chops. ( fetch, shift, export )
>>>
>>> However, I'm looking for a quicker way so I can simply copy and paste
>>> an expression
>>> to various SOP and then retype one offset/shift value.
>>>
>>> Chops would be perfect, but due to the complexity of the SOP
>>> network ....... and for
>>> better speed while still experimenting ( adding and deleting SOPs
>>> often ),
>>> I'm hoping to avoid the step of importing and exporting channels to
>>> Chops if possible.
>>>
>>> Thanks is advance for any help.
>>>
>>> Larry
>>>
>>>       
>> -- 
>> "gravity is not a force, it is a boundary layer"
>> "everything is coincident"
>> "Love: the state of suspended anticipation"
>> "To get any appreciable distance from the Earth in
>> a sensible amount of time, you must lie."
>> "Easy, is not how you make a living."
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>
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