grid_cell.c File Reference

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "grid_cell.h"
#include "utils_core.h"
#include "ensure_array_size.h"
#include "geometry.h"

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Functions
void	yac_init_grid_cell (struct yac_grid_cell *cell)
static void	ensure_grid_cell_size (struct yac_grid_cell *cell, size_t num_corners)
void	yac_copy_grid_cell (struct yac_grid_cell in_cell, struct yac_grid_cell *out_cell)
void	yac_free_grid_cell (struct yac_grid_cell *cell)
static void	set_triangle (struct yac_grid_cell cell, struct yac_grid_cell *triangle, size_t idx[3])
void	yac_triangulate_cell (struct yac_grid_cell cell, size_t start_corner, struct yac_grid_cell *triangles)
void	yac_triangulate_cell_indices (size_t const *corner_indices, size_t num_corners, size_t start_corner, size_t(*triangle_indices)[3])

Function Documentation

ensure_grid_cell_size()

static void ensure_grid_cell_size ( struct yac_grid_cell *  cell, size_t  num_corners  )

static

Definition at line 22 of file grid_cell.c.

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set_triangle()

static void set_triangle ( struct yac_grid_cell  cell, struct yac_grid_cell *  triangle, size_t  idx[3]  )

static

Definition at line 52 of file grid_cell.c.

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yac_copy_grid_cell()

void yac_copy_grid_cell	(	struct yac_grid_cell	in_cell,
		struct yac_grid_cell *	out_cell
	)

copies a given grid cell

Parameters

[in]	in_cell	cell to be copied
[out]	out_cell	copied cell

Remarks

out_cell needs to be a cell that has previously been initialised or a cell that already contains valid data

Definition at line 34 of file grid_cell.c.

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yac_free_grid_cell()

void yac_free_grid_cell

(

struct yac_grid_cell *

cell

)

frees all memory associated with a grid_cell object and reinitialised the cell

Parameters

[in,out]

cell

Examples

test_area.c, test_basic_grid_data.c, test_cell_bnd_circle.c, test_clipping.c, test_compute_overlap_area.c, test_grid2vtk.c, test_interp_grid_parallel.c, test_lat_clipping.c, test_partial_areas.c, and test_point_in_cell.c.

Definition at line 44 of file grid_cell.c.

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yac_init_grid_cell()

void yac_init_grid_cell

(

struct yac_grid_cell *

cell

)

initiates a grid_cell object before the first being used a grid_cell object has to be initialised

Parameters

[in]

cell

object to be initialised

See also

free_grid_cell

get_grid_cell

Examples

test_area.c, test_basic_grid_data.c, test_clipping.c, test_interp_grid_parallel.c, and test_lat_clipping.c.

Definition at line 14 of file grid_cell.c.

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yac_triangulate_cell()

void yac_triangulate_cell	(	struct yac_grid_cell	cell,
		size_t	start_corner,
		struct yac_grid_cell *	triangles
	)

splits given cell into triangles

Parameters

[in]	cell	cell to be triangulated
[in]	start_corner	start algorithm at corner with this index (0 <= start_corner < n; with n being number of cell corners)
[out]	triangles	triangles that are the result of the triangulation

Remarks

the user needs to provide (n-2) initialised grid_cells for the argument triangles (n being the number of cell corners of the cell)

this routine currently only works for convex grid cells

the algorithm ignores that actual edge types for cells with more than 3 corners and assumes them to be great circle edges

Definition at line 66 of file grid_cell.c.

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yac_triangulate_cell_indices()

void yac_triangulate_cell_indices	(	size_t const *	corner_indices,
		size_t	num_corners,
		size_t	start_corner,
		size_t(*)	triangle_indices[3]
	)

splits given indices of a cell into triangles

Parameters

[in]	corner_indices	cell corner indices to be triangulated
[in]	num_corners	number of corners of the cell
[in]	start_corner	start algorithm at corner with this index (0 <= start_corner < n; with n being number of cell corners)
[out]	triangle_indices	triangle indices that are the result of the triangulation

Remarks

the user needs to provide provide an array of size 3*(num_corners-2) for the argument triangle_indices

Definition at line 144 of file grid_cell.c.

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