An HDA to make thread geometry in Houdini.

This HDA is part of the Threadify pipeline to help with fabric and thread shots.

This is for Houdini INDIE licenses. Here's a link to get the version for Houdini FX (only available in beta):
https://orbolt.com/asset/bola::bola_tf_Threadify::1.0

Simply connect the node to any set of curves or lines, and it will generate a thread geometry for each primitive using your available attributes.

BENEFITS

1. Easily generate fiber geometry for ultimate thread and cloth realism

   

2. Realistic bend and curl of the fibers at the tips

   

3. Layer Threadify nodes to get more details in fast

   

4. Easy fiber count and thread fill options with automatic fiber thickness calculations

   

5. Facilitates thread animation and simulations

   

   In some cases, like in this shot, simulation is not even necessary. Animation made with the help of Threadify Trace HDA.

6. Easy to add variations
7. Export useful attributes for curve rendering and simulation

NEW FEATURES OF THE STABLE RELEASE!!

1. Support Discontinuous Threads.

Now you can blast or cull the guide curves before applying Threadify. As long as you have the right attributes, Threadify will keep the shape.

• Useful to save calculation time and geometry
• Now you can delete geometry not visible by the camera before using Threadify

2. Advanced Curl Math Toggl.

By default, Threadify will not curl the tips realistically as in the previous version.

I implemented this option to avoid crashes due to heavy meshes and speed up calculations.

You’ll probably want to enable this option for the first layers of threads and leave it disabled in the fine-detail layers to speed up the calculations.

This feature affects your previous setups. You have to enable the checkbox “Advanced Curl Math” to use the previous advanced calculations instead of the new ones. And adjust Tip Openess to match your desired look.

3. More New Features:

• Faster method to orient the curves.
• The second output has UVs.
• Exports @width attribute for easier strand rendering.
• Exports a fiber id attribute that repeats every thread (@cs_fiber_id).
• Surface Noise doesn’t change fiber count inside
• More reliable, Tested in more projects
• Free upgrade for beta owners

Trace Curves (bundled with Threadify or standalone)

An HDA to make curves and objects follow a path in Houdini.

Threadify Detangle

Prevent threads from intersecting using Threadify Detangle. It is faster and easier than using the Detangle SOP by yourself.