n_geom.c File Reference

#include <grass/N_pde.h>

Include dependency graph for n_geom.c:

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Functions
N_geom_data *	N_alloc_geom_data (void)
	Allocate the pde geometry data structure and return a pointer to the new allocated structure. More...
void	N_free_geom_data (N_geom_data *geom)
	Release memory of a pde geometry data structure. More...
N_geom_data *	N_init_geom_data_3d (RASTER3D_Region *region3d, N_geom_data *geodata)
	Initiate a pde geometry data structure with a 3d region. More...
N_geom_data *	N_init_geom_data_2d (struct Cell_head *region, N_geom_data *geodata)
	Initiate a pde geometry data structure with a 2d region. More...
double	N_get_geom_data_area_of_cell (N_geom_data *geom, int row)
	Get the areay size in square meter of one cell (x*y) at row. More...

Function Documentation

N_alloc_geom_data()

N_geom_data* N_alloc_geom_data

(

void

)

Allocate the pde geometry data structure and return a pointer to the new allocated structure.

Returns

N_geom_data *

Definition at line 29 of file n_geom.c.

References N_geom_data::area, N_geom_data::dim, G_calloc, NULL, and N_geom_data::planimetric.

Referenced by N_init_geom_data_3d().

N_free_geom_data()

void N_free_geom_data

(

N_geom_data *

geom

)

Release memory of a pde geometry data structure.

Parameters

geom	N_geom_data *

Returns

void

Definition at line 49 of file n_geom.c.

References N_geom_data::area, G_free(), and NULL.

N_get_geom_data_area_of_cell()

double N_get_geom_data_area_of_cell	(	N_geom_data *	geom,
		int	row
	)

Get the areay size in square meter of one cell (x*y) at row.

This function works for two and three dimensions

Parameters

geom	N_geom_data *
row	int

Returns

area double

Definition at line 196 of file n_geom.c.

References N_geom_data::area, N_geom_data::Az, G_debug(), and N_geom_data::planimetric.

N_init_geom_data_2d()

N_geom_data* N_init_geom_data_2d	(	struct Cell_head *	region,
		N_geom_data *	geodata
	)

Initiate a pde geometry data structure with a 2d region.

If the projection is not planimetric, a double array will be created based on the number of rows of the provided region storing all computed areas for each row

Parameters

region	sruct Cell_head *
geodata	N_geom_data * - if a NULL pointer is given, a new structure will be allocatet and returned

Returns

N_geom_data *

Definition at line 117 of file n_geom.c.

Referenced by N_init_geom_data_3d().

N_init_geom_data_3d()

N_geom_data* N_init_geom_data_3d	(	RASTER3D_Region *	region3d,
		N_geom_data *	geodata
	)

Initiate a pde geometry data structure with a 3d region.

If the projection is not planimetric, a double array will be created based on the number of rows of the provided region

Parameters

region3d	RASTER3D_Region *
geodata	N_geom_data * - if a NULL pointer is given, a new structure will be allocatet and returned

Returns

N_geom_data *

Definition at line 73 of file n_geom.c.

References RASTER3D_Region::depths, N_geom_data::depths, N_geom_data::dim, N_geom_data::dz, G_database_units_to_meters_factor(), G_debug(), G_get_set_window(), N_alloc_geom_data(), N_init_geom_data_2d(), NULL, Rast3d_region_to_cell_head(), and RASTER3D_Region::tb_res.