ClothTOP

This project demonstrates how to use NVIDIA FleX for GPU cloth simulation in a TouchDesigner Custom Operator. It also shows how to render dynamic meshes from the texture data using custom PBR GLSL material shaders inside TouchDesigner.

Features:

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

Demo Previews

Demos:

• ClothTOP_dali.toe shows complex triangle mesh collision with multiple cloth bodies.
• ClothTOP_inflatable.toe shows an inflatable body with dynamic pressure.
• ClothTOP_cloak.toe shows a 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 the /flex folder you 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 instead you are using the release, just create the Plugins folder yourself and place the .dll there.
  
• TouchDesigner 2020.28110+ supported (tested on Windows 10).

3D Models

• Dali 3D model (download and place the .fbx next to ClothTOP_dali.toe)
  
• Inflatable 3D model (already in ClothTOP_inflatable.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 deltas.
• The UV output mode can easily crash for certain meshes. Recommended use of Linear mode.