vNd.h File Reference

Interface for rNd voxelization routines. More...

#include "rNd.h"

Go to the source code of this file.

Functions
void	rNd_voxelize (rNd_poly *poly, rNd_dvec ibox[2], rNd_real *dest_grid, rNd_rvec d, rNd_int polyorder)
	Voxelize a polyhedron to the destination grid. More...
void	rNd_clamp_ibox (rNd_poly *poly, rNd_dvec ibox[2], rNd_dvec clampbox[2], rNd_rvec d)
	Get the minimal box of grid indices for a polyhedron, given a grid cell spacing, also clamping it to a user-specified range while clipping the polyhedron to that range. More...
void	rNd_get_ibox (rNd_poly *poly, rNd_dvec ibox[2], rNd_rvec d)
	Get the minimal box of grid indices for a polyhedron, given a grid cell spacing. More...

Detailed Description

Interface for rNd voxelization routines.

Author

Devon Powell

Date

15 October 2015

Function Documentation

rNd_clamp_ibox()

void rNd_clamp_ibox	(	rNd_poly *	poly,
		rNd_dvec	ibox[2],
		rNd_dvec	clampbox[2],
		rNd_rvec	d
	)

Get the minimal box of grid indices for a polyhedron, given a grid cell spacing, also clamping it to a user-specified range while clipping the polyhedron to that range.

Parameters

[in]	poly	The polyhedron for which to calculate the index box and clip.
[in,out]	ibox	Minimal range of grid indices covered by the polyhedron.
[in,out]	clampbox	Range of grid indices to which to clamp and clip ibox and poly, respectively.
[in]	d	The cell spacing of the grid. The origin of the grid is assumed to lie at the origin in space.

rNd_get_ibox()

void rNd_get_ibox	(	rNd_poly *	poly,
		rNd_dvec	ibox[2],
		rNd_rvec	d
	)

Get the minimal box of grid indices for a polyhedron, given a grid cell spacing.

Parameters

[in]	poly	The polyhedron for which to calculate the index box.
[out]	ibox	Minimal range of grid indices covered by the polyhedron.
[in]	d	The cell spacing of the grid. The origin of the grid is assumed to lie at the origin in space.

rNd_voxelize()

void rNd_voxelize	(	rNd_poly *	poly,
		rNd_dvec	ibox[2],
		rNd_real *	dest_grid,
		rNd_rvec	d,
		rNd_int	polyorder
	)

Voxelize a polyhedron to the destination grid.

Parameters

[in]	poly	The polyhedron to be voxelized.
[in]	ibox	Minimum and maximum indices of the polyhedron, found with rNd_get_ibox(). These indices are from a virtual grid starting at the origin.
[in,out]	dest_grid	The voxelization buffer. This grid is a row-major grid patch starting at d*ibox[0] and ending at d*ibox[1]. Must have size of at least (ibox[1].i-ibox[0].i)*(ibox[1].j-ibox[0].j)*(ibox[1].k-ibox[0].k)*R3D_NUM_MOMENTS(polyorder)`.
[in]	d	The cell spacing of the grid.
[in]	polyorder	Order of the polynomial density field to voxelize. 0 for constant (1 moment), 1 for linear (4 moments), 2 for quadratic (10 moments), etc.