UnstructuredGrid.h File Reference

#include <stddef.h>
#include <stdbool.h>

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Classes
struct	UnstructuredGrid

Functions
void	destroy_grid (struct UnstructuredGrid *g)
struct UnstructuredGrid *	create_grid_empty (void)
struct UnstructuredGrid *	allocate_grid (size_t ndims, size_t ncells, size_t nfaces, size_t nfacenodes, size_t ncellfaces, size_t nnodes)
void	attach_zcorn_copy (struct UnstructuredGrid *G, const double *zcorn)
struct UnstructuredGrid *	read_grid (const char *fname)
bool	grid_equal (const struct UnstructuredGrid *grid1, const struct UnstructuredGrid *grid2)

Detailed Description

Main OPM-Core grid data structure along with helper functions for construction, destruction and reading a grid representation from disk.

Function Documentation

allocate_grid()

struct UnstructuredGrid * allocate_grid	(	size_t	ndims,
		size_t	ncells,
		size_t	nfaces,
		size_t	nfacenodes,
		size_t	ncellfaces,
		size_t	nnodes
	)

Allocate and initialise an UnstructuredGrid where pointers are set to location with correct size.

Parameters

[in]	ndims	Number of physical dimensions.
[in]	ncells	Number of cells.
[in]	nfaces	Number of faces.
[in]	nfacenodes	Size of mapping from faces to nodes.
[in]	ncellfaces	Size of mapping from cells to faces. (i.e., the number of ‘half-faces’)
[in]	nnodes	Number of Nodes.

Returns

Fully formed UnstructuredGrid with all fields except global_cell allocated, but not filled with meaningful values. NULL in case of allocation failure.

Referenced by Dune::PolyhedralGrid< dim, dimworld, coord_t >::allocateGrid().

attach_zcorn_copy()

void attach_zcorn_copy	(	struct UnstructuredGrid *	G,
		const double *	zcorn
	)

Will allocate storage internally in the grid object to hold a copy of the zcorn data supplied in the second argument.

create_grid_empty()

struct UnstructuredGrid * create_grid_empty

(

void

)

Allocate and initialise an empty UnstructuredGrid.

This is the moral equivalent of a C++ default constructor.

Returns

Fully formed UnstructuredGrid with all fields zero or NULL as appropriate. NULL in case of allocation failure.

destroy_grid()

void destroy_grid

(

struct UnstructuredGrid *

g

)

Destroy and deallocate an UnstructuredGrid and all its data.

This function assumes that all arrays of the UnstructuredGrid (if non-null) have been individually allocated by malloc(). They will be deallocated with free().

Referenced by Dune::PolyhedralGrid< dim, dimworld, coord_t >::UnstructuredGridDeleter::operator()().

grid_equal()

bool grid_equal	(	const struct UnstructuredGrid *	grid1,
		const struct UnstructuredGrid *	grid2
	)

Determine whether or not two grid structures represent the same underlying geometry and topology.

The grids are declared equal if all of the following conditions hold:

1. They have the same physical dimensions, the same number of cells, the same number of faces, and the same number of nodes.
2. All cell, face, and node topology arrays are exactly equal.
3. All node coordinate, centroid, face normal, face area and cell volume arrays differ by a relative distance of at most

   1.0e-5

   in each element.

Parameters

[in]	grid1	First grid.
[in]	grid2	Second grid.

Returns

True (integer one) if the grids are equal and false (integer zero) otherwise.

read_grid()

struct UnstructuredGrid * read_grid

(

const char *

fname

)

Import a grid from a character representation stored in file.

Parameters

[in]

fname

File name.

Returns

Fully formed UnstructuredGrid with all fields allocated and filled. Returns NULL in case of allocation failure.