ClothTOP

This project demonstrates how to use NVIDIA FleX solver for GPU cloth simulation in a TouchDesigner Custom Operator. It also shows how to render dynamic meshes from the texture data using custom vertex/geometry shaders and TouchDesigner's PBR lighting functions.

Features:

Cloth/inflatable simulation with controllable anchor points.
Triangle mesh collision.
Spheres, boxes and planes collisions.
Radial forcefields.
Many controlable parameters like wind, gravity, adherence, stiffness, etc.

Samples

ClothTOP_dali.toe: complex triangle mesh collision with multiple cloth bodies.
ClothTOP_inflatable.toe: inflatable body with dynamic pressure.
ClothTOP_cloak.toe: cloth body with animated anchor points.

Install NVIDIA FleX

Download FleX 1.2 (get access here).
Create a new environment variable called NvFlexDir that holds the path to /flex (folder you've unpacked).

Compilation

Install the CUDA SDK you want to use.
Generate the Visual Studio project using CMake.
Building will automatically copy the .dll to the Plugins folder. If iusing a release dll, manually place it here.
Open a demo with TouchDesigner 2020.28110+ supported (tested on Windows 10).

Assets

Dali 3D model (download and place the .fbx next to ClothTOP_dali.toe)
Cloak 3D model (already in ClothTOP_cloak.toe)

References

The FlexCHOP by Vincent Houzé provided a starting point for this project.

Known Issues

Moving anchors too fast can cause crashes with the solver not converging for extreme position deltas.
Lack of robust error checking for input meshes.