GRASS GIS 7 Programmer's Manual
7.9.dev(2021)-e5379bbd7
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#include <grass/N_pde.h>
Go to the source code of this file.
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... | |
N_geom_data* N_alloc_geom_data | ( | void | ) |
Allocate the pde geometry data structure and return a pointer to the new allocated structure.
Definition at line 30 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().
void N_free_geom_data | ( | N_geom_data * | geom | ) |
Release memory of a pde geometry data structure.
geom | N_geom_data * |
Definition at line 50 of file n_geom.c.
References N_geom_data::area, G_free(), and NULL.
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
geom | N_geom_data * |
row | int |
Definition at line 192 of file n_geom.c.
References N_geom_data::area, N_geom_data::Az, G_debug(), and N_geom_data::planimetric.
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
region | sruct Cell_head * |
geodata | N_geom_data * - if a NULL pointer is given, a new structure will be allocatet and returned |
Definition at line 114 of file n_geom.c.
Referenced by 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
region3d | RASTER3D_Region * |
geodata | N_geom_data * - if a NULL pointer is given, a new structure will be allocatet and returned |
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.