A signed-distance field sampled on a regular axis-aligned grid (negative inside solid). More...

#include <grid_sdf.hpp>

Public Member Functions
double	at (Index i, Index j, Index k) const
	Raw sample lookup at integer grid index (i,j,k); no bounds checking.

double	eval (const Vec< 3 > &p) const
	Trilinearly-interpolated signed distance at world point `p`.

Public Attributes
std::vector< float >	values
	Sample values, x-fastest: idx = i + jnx + knx*ny.

IVec< 3 >	dims {}
	Sample count per axis (nx, ny, nz).

Vec< 3 >	origin {}
	World position of sample (0,0,0).

Vec< 3 >	spacing {1, 1, 1}
	World-space distance between samples per axis.

Detailed Description

A signed-distance field sampled on a regular axis-aligned grid (negative inside solid).

Models the peclet::core::geom::Sdf concept via eval(). Storage is x-fastest, matching the suite indexing convention and the VTI fields produced by flow/dem.

Definition at line 23 of file grid_sdf.hpp.

Member Function Documentation

◆ at()

double peclet::core::geom::GridSdf::at	(	Index	i,
		Index	j,
		Index	k
	)		const

inline

Raw sample lookup at integer grid index (i,j,k); no bounds checking.

Definition at line 30 of file grid_sdf.hpp.

References dims, and values.

Referenced by eval().

◆ eval()

double peclet::core::geom::GridSdf::eval ( const Vec< 3 > & p ) const

inline

Trilinearly-interpolated signed distance at world point p.

Queries outside the sampled box clamp to the nearest in-domain sample.

Definition at line 36 of file grid_sdf.hpp.

References at(), dims, origin, and spacing.

Member Data Documentation

◆ values

std::vector<float> peclet::core::geom::GridSdf::values

Sample values, x-fastest: idx = i + j*nx + k*nx*ny.

Definition at line 24 of file grid_sdf.hpp.

Referenced by at(), peclet::core::geom::readVti(), peclet::core::geom::sample(), and peclet::core::geom::writeVti().

◆ dims

IVec<3> peclet::core::geom::GridSdf::dims {}

Sample count per axis (nx, ny, nz).

Definition at line 25 of file grid_sdf.hpp.

Referenced by at(), eval(), peclet::core::geom::readVti(), peclet::core::geom::sample(), and peclet::core::geom::writeVti().

◆ origin

Vec<3> peclet::core::geom::GridSdf::origin {}

World position of sample (0,0,0).

Definition at line 26 of file grid_sdf.hpp.

Referenced by eval(), peclet::core::geom::readVti(), peclet::core::geom::sample(), and peclet::core::geom::writeVti().

◆ spacing

Vec<3> peclet::core::geom::GridSdf::spacing {1, 1, 1}

World-space distance between samples per axis.

Definition at line 27 of file grid_sdf.hpp.