fem.sdf_to_hex_mesh

fem.sdf_to_hex_mesh(sdf, grid, *, snap=True)

Extract a HEX8 volume mesh from an SDF on a regular grid.

Cells whose center lies inside (sdf < 0) are kept, sharing vertices through the lattice. With snap=True boundary vertices within one cell diagonal of the zero set are Newton-projected onto the surface along the field gradient, with total displacement clamped to half the cell diagonal; a vertex is left unsnapped if moving it would invert any incident hex (corner-tet volume check).

Parameters

Name	Type	Description	Default
sdf	Callable[[Any], Any]	Signed distance field callable on (..., 3) points.	required
grid	GridSpec	Sampling lattice.	required
snap	bool	Project boundary vertices onto the zero set.	True

Returns

Name	Type	Description
	HexMesh	The extracted :class:HexMesh.

Raises

Name	Type	Description
	ValueError	If no cell center lies inside the field.