Shwartz Diamond filling surface

[maxim1000]

No description provided.

[RF47]

I just implemented your code in Orca Slicer and works great, for this infill Density Adjust = 2.1 is more precise.
static constexpr double Density Adjust = 2.1;

[maxim1000]

@RF47 , cool :)
and thanks for the tip regarding the density adjustment

[RF47]

I also changed paterntolerance to 0.1, it produces smoother curves without affecting performance too much.

[gudvinr]

You need to be more expressive about changes you're doing when you make PRs to public projects. As of now, it's just a dump of weird math.

Add some simple explanation of whatever is "Schwartz Diamond", why it's good and why you decided to add it.
Throw in some pictures, references to research papers, etc.

[jedisct1]

Some references on Schwartz D:

• https://pmc.ncbi.nlm.nih.gov/articles/PMC6384811/
• https://www.padtinc.com/2019/05/09/3d-printing-infill-styles-the-what-when-and-why-of-using-infill/

Slightly faster to print than Gyroid with similar mechanical properties, but uses more material.

[jedisct1]

FKS may be more interesting to explore.

It can be approximated as:

$\cos(2x) \cdot \sin(y) \cdot \cos(z) + \cos(2y) \cdot \sin(z) \cdot \cos(x) + \cos(2z) \cdot \sin(x) \cdot \cos(y) = 0$

See https://github.com/jedisct1/fischer-koch-s

[RF47]

FKS may be more interesting to explore.

It can be approximated as:

cos ⁡ ( 2 x ) ⋅ sin ⁡ ( y ) ⋅ cos ⁡ ( z ) + cos ⁡ ( 2 y ) ⋅ sin ⁡ ( z ) ⋅ cos ⁡ ( x ) + cos ⁡ ( 2 z ) ⋅ sin ⁡ ( x ) ⋅ cos ⁡ ( y ) = 0

See https://github.com/jedisct1/fischer-koch-s

SoftFever/OrcaSlicer#10360