[Sidefx-houdini-list] screen space pscale?

jon parker parker.jon at gmail.com
Thu Sep 25 00:26:13 EDT 2014


I should add that it's sensitive to object scale!  So if your object has a
scale of 10, divide vm_geofilterwidth by 10 to get 1 pixel wide.

On Thu, Sep 25, 2014 at 12:24 AM, jon parker <parker.jon at gmail.com> wrote:

> If you want the point to always render within one pixel of your output
> image, then go with eetu's recommendation.
>
> I submitted a RFE for this a while back, but it hasn't been implemented.
> Although you might say that half of this idea has actually been done
> already; if you add the render property "vm_geofilterwidth" at object level
> you can specify the minimum pixel width of a point/line.  That is only a
> minimum, if you get too close it will still eventually fill the screen. As
> well, it will multiply the opacity by the pixel area size of the point, so
> the smaller it gets, the more it "fades".  Originally I think it was meant
> for fur renders.
>
> Jon
>
> On Wed, Sep 24, 2014 at 1:47 PM, Anderson, Charles X. -ND <
> Charles.X.Anderson.-ND at disney.com> wrote:
>
>> Hey All,
>>
>> I need to be able to set pscale on some points so that they are always 1
>> pixel wide regardless of distance from camera.   I've tried using a
>> distance from camera times 1/x resolution, but it's not quite what I want.
>>  Maybe something shader based using the fliterstep function.   Any ideas?
>>   Any ideas on how to treat a pixel not falling exactly on a pixel row or
>> column?   Shift it slightly perhaps?  Should be simple but I'm just
>> blanking out on this one.  Any help is greatly appreciated.
>>
>> Cheers
>>
>> Charles
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>
>



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