One stencil cell's PLIC polygon in the PV fit: the parameters of pvFitTerm and pvFitAdd. More...

#include <curvature.hpp>

Public Attributes
double	w

double	B

double	s [6]

bool	ok

Detailed Description

One stencil cell's PLIC polygon in the PV fit: the parameters of pvFitTerm and pvFitAdd.

Parameters

mx,my,mz,alpha	the cell's PLIC plane in ITS OWN unit-cell coordinates (`plic.hpp`).
off	the cell's integer index offset from the target cell.
org	the fit's origin (the target cell's PLIC centroid) in target-centred cell units.
t1,t2,nn	the orthonormal frame; `nn` is the target's unit PLIC normal.
dW	Wendland support width in cell units.
cosMin	reject a polygon whose own normal makes an angle with `nn` whose cosine is below this. The projection onto the (x',y') plane degenerates as that cosine goes to zero (the plane's ‘z’ = b0 + b1 x' + b2 y'`form blows up while its projected area vanishes), and a back-facing polygon would be integrated with the wrong sign of`z'`. Jibben's area projection` A (n.n_p)` decays to zero over the same range; this is the explicit version of the same guard.

pvFitAdd is the composition of pvFitTerm (the per-polygon map) and pvFitAccum (the += into the normal equations), bitwise (tests/test_vof_pvfit.cpp). The split lets a device fallback evaluate the stencil's terms in parallel and still accumulate them in the canonical order (flow doc/vof_step_performance_design.md §4.7, §5.11).

Definition at line 752 of file curvature.hpp.