Function sdf_curvature 

pub fn sdf_curvature(
    tfs: &[f64],
    mask: &[f64],
    vasc_only: &[f64],
    grid: &Grid,
    params: &SdfParams,
) -> Vec<f64>

SDF with curvature-based weighting (full QSMART pipeline)

This is the main entry point matching QSMART’s sdf_curvature function.