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sidefx-houdini-list June 2012

sidefx-houdini-list@sidefx.com

53 participants
31 discussions

Vancouver VHUG files available 6 years, 4 months

Peter Bowmar

hi, Thanks to Marc at Odforce, now a (proud?) VHUG member/attendee, some of the demo files from the VHUG meetings are available here: http://odforce.net/vhug/ I will keep updating this as time allows. For previous presenters: if you are able to send me files from past VHUG (even 1-2 years ago) please do! -- Cheers, Peter B --No, I am not on Facebook.

no category

1 participants
0 comments

converting tetrahedra 6 years, 4 months

David Kirchner

Hi, I've got a problem converting tetrahedra. I am using the isooffset sop to create a tetrahedra mesh (output type: tetra mesh, tetra type: tetra solid). After that I am trying to convert the tetrahedra to polygons with the convert sop. My problem is that I can't get the polygons connected based on the single tetrahedra. I am getting one big connected mesh with shared faces. Instead I want a mesh with several connected polygons (same number as tetrahedra and multiple faces when the tetrahedra are aligned). Thanks for any ideas to solve the problem. :) David -- Empfehlen Sie GMX DSL Ihren Freunden und Bekannten und wir belohnen Sie mit bis zu 50,- Euro! https://freundschaftswerbung.gmx.de

no category

3 participants
7 comments

Get Camera name from Python 6 years, 4 months

Nikita Musatov

Hi! I find command to get current Viewport, but cann`t find active camera (toolutils.sceneViewer().curViewport()). How get active camera in viewport with Python?

no category

3 participants
3 comments

sdf for thin glass sheet in bullet dyn fracture 6 years, 4 months

Zoran Arizanovic

hi i am fracturing some glass sheet which is just a plain thin cube if i go bellow to thickness which resembles ratio that is closer to glass sheet and not wall thicknes i have problems getting collision to work so i can break it with my flying spheres on point rbd is there any guidance rule? for bullet and fracturing in dops which collison sampling works best? thanks -- Zoran Arizanovic vfx reel : http://vimeo.com/28605448 http://www.imdb.com/name/nm2902303/

no category

3 participants
4 comments

Reflection angle noise 6 years, 4 months

Pablo Giménez

Hello all. I am doing some Mantra rendering testing, and I have found very hard to get blurry reflections/refractions working. As soon as I increased Specular/Reflection/Refraction angle it blurs reflactions/refractions but it also creates a lot of noise as expected. I haven't found any good way to remove this noise. Increasing the sampling quality of the lights that contributes to specualr didn't help, neither increasing the sampling quality for object reflection or refraction. I have also tried increasing the Min/Max Ray Samples and reduce the Noise Level. Nothing seams to really helps, except I haveto increase the values to crazy numbers, which obviously makes the render not practical. So I have to put a very subtle blurry, like 0.2 to make the nosie less noticiable. Any tips aboyt how to get clean reflections/refractions? For the specular light I am not using a comvoluted environment map, will it helps? I am using H11, has Mantra for H12 improved on this side? Thanks -- Un saludo Best Regards Pablo Gim?nez

no category

9 participants
18 comments

generated rib file has both "facevarying normal N" and "varying normal N" 6 years, 4 months

Skeel

Hey everyone, I have generated a subdivision mesh from a RenderMan Archive ROP, thanks to Alvaro. Another problem that I have now: I used a Vertex SOP to get a per-vertex normal, which translates to "facevarying normal N" in the rib file and that is what I am looking for. However, there's an extra bit in the same rib file that says "varying normal N". This extra part is causing some problems in my prman renders. There is no N attribute in any point on the mesh. Looks like this N attribute is automatically generated when creating the rib file. Is there any way to make Houdini not write it out? Cheers! p/s: how do I reply to a thread in the houdini mailing list??

no category

3 participants
3 comments

problem writing .exr files 6 years, 4 months

jed schwartz

Apologies for the off topic question, I'm having trouble writing .exr files to the network server. All other file formats write without any problem. Permissions, users, groups etc. appear to be set correctly- Running linux - ubuntu 8.04- .exr writes to the local drive without any problem, just wont save over the network-? Must be something simple--- any thoughts? Thanks! Jed- Jed Schwartz Creative Director Jed Schwartz Productions 603-495-3125 jed at jedschwartz.com http://www.jedschwartz.com This e-mail (including any attachments) is confidential and may be legally privileged. If you are not an intended recipient or an authorized representative of an intended recipient, you are prohibited from using, copying or distributing the information in this e-mail or its attachments. If you have received this e-mail in error, please notify the sender immediately by return e-mail and delete all copies of this message and any attachments.

no category

1 participants
0 comments

Subdiv in Renderman Archive ROP 6 years, 4 months

Skeel

Hey everyone, I'm trying to create a prman16.0 rib archive using the RenderMan Archive ROP. The rib file produces a 'PointsGeneralPolygons' geometry but I need a 'SubdivisionMesh "catmull-clark"' instead. Are there any options to turn on the subdiv mode when writing rib archives? I've tried turning on "Polygons as Subdivision" in the geometry node but that didn't help. Thanks in advance!

no category

2 participants
1 comments

OT:How do 3D booleans work? 6 years, 4 months

JUSTIN REEVES

I know this is the place to ask, even if the software is different. I used to be a Houdinizen, but with the lack of work in Utah for such i have directed those skills to Solidworks and engineering/machining. The question: I know your not supposed to use 3D booleans because there expensive, and we run into the geometry being flawed at a much higher percentage if we use them, but I would like to know how they work, and also in comparison to cutting the objects up yourself and knitting them together, which I know is far less expensive and has less flawed geo. Justin Reeves

no category

2 participants
1 comments

rbd impacts analysis 6 years, 4 months

Zoran Arizanovic

hi is there a way to see in spreadsheet , details view all the impacts values for every piece of fractured geo side by side to get average impact value and be able to decide which impact and from what object actually breaks object and which not thanks -- Zoran Arizanovic vfx reel : http://vimeo.com/28605448 http://www.imdb.com/name/nm2902303/

no category

1 participants
0 comments

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sidefx-houdini-list June 2012