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fmx 2017 // Houdini od-lunch // Wed May 3 1 year, 12 months

Oliver Markowski

Hello fellow Houdniks, FMX is around the corner again and of course there will be another user-meeting this year. od-lunch will be on Wednesday May 3 during the official FMX lunch break from 1PM-2PM. I made a reservation for 20 people at the restaurant ?Logo? directly inside ?Haus der Wirtschaft? (the FMX venue). No registration this year - first come first served! There will be one more reminder email one day before but you better save the date already! Looking forward to seeing you again! Cheers Oliver Markowski

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1 participants
1 comments

vop addprim 1 year, 12 months

Olivier Jeannel

Hi guys, Does someone has an example of how addprim VOP should be connected ? Let's say I have 10 points and want to add on big open polygon (line) to them. The internet is empty... (and oddforce is closed) Thank you !

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5 participants
13 comments

how do you add cvex magic alongside a volume procedural whilst instancing using the "instancefile" attr? 2 years

tom bolt

Hi Guys If anyone has done this and has a solution or any advice that would be great and hugely appreciated. It is fairly easy to do all of this if your volumes to instance are within your hip scene. However once you are only referencing them from disk I am struggling to run the cvex over each instanced volume (of which I am using 20 different variations hence using the "instancefile" attr.) I am also trying to volume sample each instance to pull in surface, rest etc primitives into the cvex context to drive my displacement noise. many thanks tom -- *Tom Bolt3d ArtistTel +44(0)78 01991149*

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1 participants
0 comments

Python? 2 years

Floyd Gillis

What is "./hfs16.0.559/houdini/python2.7libs/bookish/static/editor/codemirror/mode/brainfuck" used for?

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3 participants
2 comments

Performance gain in sim with different scene scale 2 years

François Duchesneau

Hi guys, Somebody at work said he tries to avoid smaller div size simulation because he heard somewhere smaller scale sims tend to be slower. I don't see why it would make a difference to sim a box 1x1x1 at a div size of 0.01 than one at 10x10x10 at 0.1. Does anyone agree with this and can somebody explain why the second case would be faster? Thanks Francois

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4 participants
6 comments

OpenCL? 2 years

craig hoffman

Do I need to do anything special beyond just "Use OpenCL" in the Pyro Solver Advanced tab to take advantage of my NVidia GPU for Fluid Sims? I just upgraded from a 660Ti to a 1070 and honestly don't see much of a speedup, so I am wondering if perhaps it is using the integrated GPU on my Core i7 and not the actual graphics card - if that is possible. I am just playing around with small sims (fire/explosions) and was expecting to get a much bigger boost. Also, I know there are some things that kill GPU efficiency for sims and force the CPU to be used - so is there any documentation about how to keep a Fluid sim on the GPU as much as possible? Thanks, -Craig

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1 participants
0 comments

point cloud in shader to live operator 2 years

Tom Nixon

Hey everyone, I am unsure as to whether I'm having a false memory here. I have at least one confirmation in-house of Houdini once supporting op syntax in the file path for a pointcloud on a shader, but others are telling me it never did. I recall being about to put op:/obj/path/to/node and getting the desired result. I'm finding now that I have to cache that out to disk to get it working. Am I totally off, and it was never supported, or is this a bug? Thanks, Tom

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3 participants
4 comments

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HDK: Few questions 2 years

Pradeep Barua

-How does GA_Offset work? How to remove holes from offset? The defragmentation should be done manually or it happens dynamically(I mean automatically by Houdini)? -Drag header files? I noticed that even without including some of the headers, I'm able to use their members. Are those headers dragged by compiler? If so, is it good practice? And in what order(and how) headers are dragged? -Is the following right way to inherit attribs? I've two points(source and target), and have a polyline(GU_PrimPoly) from those then created few more points(sort of resample) by adding more in-between points to GU_PrimPoly::build(). I want to inherit point attribs from source point to newly created points. ////////////////////////////////////////////////////////////////////////////////////// //**** calculated some where else ****/////// //std::vector<const GA_Attribute*> attribToInheritVector; // source point attribs to inherit //std::vector<GA_Offset*> pts; // points in the GU_PrimPoly line ////////////////////////////////////////////////////////////////////////////////////// for (int i = 0; i < attribToInheritVector.size(); i++) { const GA_Attribute *attribToInherit = attribToInheritVector[i]; int attribSize = attribToInherit->getTupleSize(); int attribTypeId = attribToInherit->getType().getTypeId(); // id 2: numeric(float, int, std::vector), id 3: string if (attribTypeId == 2) { // read values const GA_AIFTuple *tuple = attribToInherit->getAIFTuple(); float attribValue[4]; tuple->get(attribToInherit, n, attribValue, attribSize); // write values for (int j = 0; j < pts.size(); j++) // or for (auto j : pts) { for (int k = 0; k < attribSize; k++) { // attribToInherit->getName() is current attrib name GA_Attribute *attrib = gdp->findAttribute(GA_ATTRIB_POINT, attribToInherit->getName()); tuple->set(attrib, *pts[j], attribValue[k], k); } } } } Thank you! -Pradeep Barua

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2 participants
1 comments

noob permission error 2 years

Gary Jaeger

I have no idea what this means. After launching H16, doing the simplest thing (i.e. trying to create a box, or circle, etc) I get the error below. I know I didn't explicitly change any permissions. The only thing I can think of is that I was doing the H16 Master Class on rigging, and saving the files I would get some message about Saving Definitions to Hip File, but I didn't understand that message quite either :) Anyway, what have I done? thanks! It's all a bit opaque to me. --- Failed to modify node or parameter because of a permission error. Possible causes include locked assets, takes, production permissions or user-specified permissions Traceback (most recent call last): File "sop_box", line 4, in <module> File "/Applications/Houdini/Houdini16.0.563/Frameworks/Houdini.framework/Versions/16.0.563/Resources/houdini/python2.7libs/toolutils.py", line 1251, in new_func return function(*args, **kwargs) File "/Applications/Houdini/Houdini16.0.563/Frameworks/Houdini.framework/Versions/16.0.563/Resources/houdini/python2.7libs/soptoolutils.py", line 740, in genericTool event_context = event_context) File "/Applications/Houdini/Houdini16.0.563/Frameworks/Houdini.framework/Versions/16.0.563/Resources/houdini/python2.7libs/toolutils.py", line 1254, in new_func "Failed to modify node or parameter because of a permission " Error: Failed to modify node or parameter because of a permission error. Possible causes include locked assets, takes, product permissions or user-specified permissions. -- Gary Jaeger // Core Studio 249 Princeton Avenue Half Moon Bay, CA 94019 650.728.7957 (direct) ? 650.728.7060 (main) http://corestudio.com

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2 participants
3 comments

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sidefx-houdini-list April 2017