cs_mesh_intersect.c File Reference

#include "cs_defs.h"
#include <assert.h>
#include <math.h>
#include <string.h>
#include "bft_mem.h"
#include "cs_base.h"
#include "cs_geom.h"
#include "fvm_nodal.h"
#include "fvm_point_location.h"
#include "cs_math.h"
#include "cs_mesh.h"
#include "cs_mesh_connect.h"
#include "cs_mesh_quantities.h"
#include "cs_mesh_intersect.h"

Include dependency graph for cs_mesh_intersect.c:

Functions
void	cs_mesh_intersect_segment_cell_select (void *input, cs_lnum_t *n_cells, cs_lnum_t **cell_ids)
	Select cells cut by a given segment. More...
void	cs_mesh_intersect_polyline_cell_select (void *input, cs_lnum_t n_points, cs_lnum_t *n_cells, cs_lnum_t **cell_ids, cs_real_t **seg_c_len)
	Select cells cut by a line composed of segments. More...
void	cs_mesh_intersect_polyline_map (cs_lnum_t n_points, const cs_real_t point_coords[], cs_real_t min_fraction, cs_lnum_t **seg_cell_idx, cs_lnum_t **seg_cell, cs_real_t **seg_cell_fraction)
	Map a polyline of segments to the local mesh. More...

Function Documentation

cs_mesh_intersect_polyline_cell_select()

void cs_mesh_intersect_polyline_cell_select	(	void *	input,
		cs_lnum_t	n_points,
		cs_lnum_t *	n_cells,
		cs_lnum_t **	cell_ids,
		cs_real_t **	seg_c_len
	)

Select cells cut by a line composed of segments.

This selection function may be used as an elements selection function for postprocessing.

In this case, the input points to a real array containing the segment's start and end coordinates.

Note: the input pointer must point to valid data when this selection function is called, so either:

• that value or structure should not be temporary (i.e. local);
• post-processing output must be ensured using cs_post_write_meshes() with a fixed-mesh writer before the data pointed to goes out of scope;

The caller is responsible for freeing the returned cell_ids array. When passed to postprocessing mesh or probe set definition functions, this is handled automatically.

Parameters

[in]	input	pointer to segments starts and ends: [x0, y0, z0, x1, y1, z1]
[in]	n_points	number of vertices in the polyline
[out]	n_cells	number of selected cells
[out]	cell_ids	array of selected cell ids (0 to n-1 numbering)
[out]	seg_c_len	array of length of the segment in the selected cells

cs_mesh_intersect_polyline_map()

void cs_mesh_intersect_polyline_map	(	cs_lnum_t	n_points,
		const cs_real_t	point_coords[],
		cs_real_t	min_fraction,
		cs_lnum_t **	seg_cell_idx,
		cs_lnum_t **	seg_cell,
		cs_real_t **	seg_cell_fraction
	)

Map a polyline of segments to the local mesh.

The caller is responsible for freeing the returned seg_cell* arrays.

Parameters

[in]	n_points	number of vertices in the polyline
[in]	point_coords	pointer to segments starts and ends: [x0, y0, z0, x1, y1, z1, ...]
[in]	min_fraction	minimum fraction of each edge under which fraction is ignored
[out]	seg_cell_idx	index of start an end cell ids per segment (size: n_points == n_segments-1)
[out]	seg_cell	cells intersected by each segment i are given by seg_cell[], with seg_cell_idx[i] <= j < with seg_cell_idx[i+1]
[out]	seg_cell_fraction	fraction of each segment in intersected cells (same index as seg_cell)

cs_mesh_intersect_segment_cell_select()

void cs_mesh_intersect_segment_cell_select	(	void *	input,
		cs_lnum_t *	n_cells,
		cs_lnum_t **	cell_ids
	)

Select cells cut by a given segment.

This selection function may be used as an elements selection function for postprocessing.

In this case, the input points to a real array containing the segment's start and end coordinates.

Note: the input pointer must point to valid data when this selection function is called, so either:

• that value or structure should not be temporary (i.e. local);
• post-processing output must be ensured using cs_post_write_meshes() with a fixed-mesh writer before the data pointed to goes out of scope;

The caller is responsible for freeing the returned cell_ids array. When passed to postprocessing mesh or probe set definition functions, this is handled automatically.

Parameters

[in]	input	pointer to segment start and end: [x0, y0, z0, x1, y1, z1]
[out]	n_cells	number of selected cells
[out]	cell_ids	array of selected cell ids (0 to n-1 numbering)