Ghost SPH Sample Finished

Finished the sampling part of ghost SPH.

The sampling process take a few steps as follows. The input is a level set field which describe the shape of the fluid.

1. Sample the surface, namely those voxels where level set change sign.

2. Relaxing surface particles. This would yield better distribution of surface particles(blue noise).

3. Sample the interior part of fluid. Using the surface particles as initial seed.

4. Apply volume relaxation. This is a extremely slow process, multiple iterations, and within each iteration, neighbor search has to be applied to each particle.

5. Sample air particles. Similar as volume sample. Using surface particles as seeds, sample air particles outside the surface within a single-smooth-kernel layer with the help of level set.

The result so far looks like this:

The green particles are ghost particles, and blue ones as fluid particles.

The next step would be transplanting all the calculation parts in my previous SPH simulator into this new one.

My understanding for the paper might not be 100 percent correct, now I still have a few confusion related to this paper. I'm contacting the author recently and hopefully they could unravel my questions.

I'll keep updated.