[Sidefx-houdini-list] Instancing in H11

jon parker parker.jon at gmail.com
Wed Sep 22 14:20:49 EDT 2010


Back in 9.5 I remember having to make an expression to disable the
original light... something like this in the intensity parm:
if(instancepoint() ==0, 0, 1)
Jp

On Tuesday, September 21, 2010, Alex Czetwertynski
<alex at franktheplumber.com> wrote:
> Hmm, looks like I solved my own problem...For some reason I was convinced
> the normals on the dome would have to point towards the object in the center
> of it, but it looks like the opposite is the case.  Would love to understand
> why, but in the mean time, it works :)
>
> Thanks
> Alex
>
>
> On 9/21/10 6:29 PM, "Alex Czetwertynski" <alex at franktheplumber.com> wrote:
>
>> Has something changed with regards to instancing in H11?
>>
>> I'm following some very specific steps to create a light dome, and I can see
>> this working in files created in earlier versions, but it will absolutely
>> not work in H11....
>> Maybe I'm doing something wrong.
>>
>> I basically have a carved Nurbs sphere to which I added a Point SOP pointing
>> the normals inwards.
>> I then add the Instance folder to it and put my Light in the "Instance
>> Object" field.
>> I can see that the instancing works, but my original light is still clearly
>> contributing to the scene.  If I turn it off, I don't get any light at all.
>> I did turn of its display flag, but that does not seem to solve the problem
>>
>> I tried doing the same thing but using an Instance object instead, as it is
>> the approach the manual seems to recommend.  But that does not produce any
>> result...
>>
>> Here is my source file, if anybody wants to take a look.  If you turn off
>> the Instance1 and turn on the Dome you will see the two objects being used
>> for instancing.
>>
>> http://christinerenee.net/alex/LightDomeHDA_build_2c.hipnc.zip
>>
>> Thanks!
>> Alex
>>
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