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Questions tagged [houdini]

Houdini is an advanced procedural modeling, animation, effects, simulation, rendering, and compositing package.

Houdini is a procedural modeling, animation, effects, simulation, rendering, and compositing package.

Houdini is based on procedural workflows. Working in Houdini involves creating networks of nodes connected together that describe the steps to accomplish a task. For example, a node that creates a box might be wired into a node that extrudes sides of the box, then a node that subdivides the polygons, then a node that edits the point positions.

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To what extent is Houdini capable of procedural animation?

I've recently been getting into character animation, but since I come from a programming background I like to approach everything procedurally. I got started with rigging and animation using Blender and Cascadeur, but that approach seems very…
Nikola Bozhkov
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Houdini command line render undefined variable

I'm trying to render a Houdini scene (I downloaded the free "Bar scene" from sideFX website) on linux via command line using the following line of code: /opt/hfs18.0.499/bin/hrender -d mantra1…
user12014800
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Houdini custom LiDAR importer in Python using Laspy Module

I am trying to build a custom LiDAR importer for Houdini with Python. The Laspy Module (https://pypi.org/project/laspy) does so far a good and quick job by reading and writing *.*las files inside Houdini and also filtering the classifications. But I…
Santos
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Hosting Houdini sample on Codepen

I would like to host Houdini API sample (with Paint Worklet) on Codepen. But it doesn't work. It works on my website with HTTPS. https://github.com/benoitdelorme/houdini-sample/tree/master/paint-worklet.
Ben
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Houdini, Python: range, randomize and timeshift keyframes

I have a simple model object_A that has 10 keyframes. Frames 1-5 have rotation only on X, frames 6-10 have rotation only on Y. Per copy to point (Houdini) I copy object_A as an instance on every point on a grid. Now I would like to range, randomize…
Santos
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How do I export Whitewater as VDB from Houdini to use in another program?

I've had great success exporting fire and smoke as VDB to then open in another 3D program, but I keep failing at exporting whitewater as VDB which can successfully be opened in the next program. It imports with the right attributes and dimensions,…
blendering
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C++ cannot open source file "hboost/predef/os/cygwin.h

I'm working with Houdini HDK (API), when I include #include or some other preprocessor i get the error message the visual studio gives me this error, C++ cannot open source file "hboost/predef/os/cygwin.h the full error…
Amin Khormaei
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Can I export Particle Fluid as VDB from Houdini?

I've created a scene in which water pours from a park fountain and I'd like to export the fluid simulation as VDB to import into Blender. Is this possible? I've found the VDB From Particles and VDB from Particle Fluid nodes, but I'm not having luck…
blendering
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Attribute Paint node is missing from Houdini, how can I access it?

I'm using Houdini Apprentice, and though there are certain limitations with that there doesn't seem to be any mention of losing access to that particular node with this version. Other attributes are available: blur, composite, noise, promote, etc.…
blendering
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How to resolve Pymongo Runtime Error R6034 in Houdini

I'm working at a visual effects studio in which we use MongoDB/pymongo for our asset management. Our studio is using the SideFX software Houdini. So far MongoDB has been a pleasure to work with in terms of programming, however whenever we connect to…
Manuel
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How to change value in a drop down list in Houdini with Python?

I have 2 problems: 1. I don´t know hot to add 2 points in fuse node. I tried to write this: union1.parm('querygroup').set (2) union1.parm('querygroup').set (3) union1.parm('tol3d').set(1.25) and don't work then I tried to write…
user11683776
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Rotate to face vector in Houdini with python

I am trying to make a geometry in Houdini face the same direction as a normal on a line. I am getting the normal as a vector with magnitude 1 and then using the formula angle = arccos((x dot y)/(magnitude x * magnitude y). to get the angle to rotate…
PaulB
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gaps in QTreeWidget AlternatingRowColors

I'm trying to add a QTreeWidget with alternating row colours to a python panel in Houdini but getting these strange gaps in the dark alternations. Has anyone seen this problem before and know how to fix it? Thanks, Mark
Mark
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How to execute Maya python scripts in PyCharm

I'm writing some simple pipeline scripts for my company. I did lots of houdini work in pycham and it works as expected: When you work in houdini python interpreter it is like working in houdini without UI. BUT, with Maya I cant get anything working…
Tom Vujnovic
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SideFX Houdini per pixel surface position and normals through whole scene

how can I get per pixel all surface positions and normals of the whole scene. I don't want to stop at the first hitten surface. I need to get information about all object. For example a cube is in front of the sphere. The camera position just shows…
TheT
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