Source code from the SIGGRAPH 2020 technical paper Constraint Bubbles and Affine Regions: Reduced Fluid Models for Efficient Immersed Bubbles and Flexible Spatial Coarsening

To build this project in Houdini (Linux):

1. Install Eigen

2. Make a folder called External the top level of the repository.

3. Clone the Geometric Multigrd Pressure Solver into the External folder

4. Install Houdini 18.0 or higher.

5. Go to install folder (/opt/hfs.xx).

6. Type "source houdini_setup" to get the necessary environment variables.

7. Make a build folder the top level of the repository.

8. Run cmake .. in the build folder

9. Run make in the build folder.

10. Verify that it was added to Houdini by:

• Launch Houdini.
• Press "tab" in the Network Editor and select a "DOP Network" and place it in the editor.
• Jump into the DOP Network, press "tab" again and verify that "HDK Affine Bubble Pressure Solver" is searchable.

To build this project in another OS, please refer to the Houdini HDK.