Struct VoxelSdf 

pub struct VoxelSdf {
    pub nx: usize,
    pub ny: usize,
    pub nz: usize,
    pub origin: [f64; 3],
    pub dx: f64,
    pub values: Vec<f64>,
}

Discretised signed distance field on a regular axis-aligned grid.

Fields

nx: usize

ny: usize

nz: usize

origin: [f64; 3]

dx: f64

values: Vec<f64>

Implementations

impl VoxelSdf

pub fn new(nx: usize, ny: usize, nz: usize, origin: [f64; 3], dx: f64) -> Self

Create a zeroed voxel grid.

pub fn idx(&self, ix: usize, iy: usize, iz: usize) -> usize

Flat index from 3-D grid coordinates.

pub fn world_to_grid(&self, p: [f64; 3]) -> [f64; 3]

Convert a world-space point to fractional grid coordinates.

pub fn sample_trilinear(&self, p: [f64; 3]) -> f64

Trilinear interpolation of the voxel grid at world-space point p.

pub fn from_sdf( sdf: &dyn Sdf, nx: usize, ny: usize, nz: usize, origin: [f64; 3], dx: f64, ) -> Self

Populate the grid by evaluating sdf at every cell centre.

pub fn gradient_central(&self, ix: usize, iy: usize, iz: usize) -> [f64; 3]

Central-difference gradient at grid cell (ix, iy, iz).