mettools.c File Reference

Metric tools for the mmg applications. More...

#include "mmgcommon.h"

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Functions
int	MMG5_buildridmetfic (MMG5_pMesh mesh, double t[3], double n[3], double dtan, double dv, double dn, double m[6])
int	MMG5_intmetsavedir (MMG5_pMesh mesh, double *m, double *n, double *mr)
int	MMG5_buildridmet (MMG5_pMesh mesh, MMG5_pSol met, int np0, double ux, double uy, double uz, double mr[6], double r[3][3])
int	MMG5_buildridmetnor (MMG5_pMesh mesh, MMG5_pSol met, int np0, double nt[3], double mr[6], double r[3][3])
int	MMG5_intersecmet22 (MMG5_pMesh mesh, double *m, double *n, double *mr)
int	MMG5_mmgIntextmet (MMG5_pMesh mesh, MMG5_pSol met, int np, double me[6], double n[3])
int	MMG5_paratmet (double c0[3], double n0[3], double m[6], double c1[3], double n1[3], double mt[6])

Detailed Description

Metric tools for the mmg applications.

Author

Charles Dapogny (UPMC)

Cécile Dobrzynski (Bx INP/Inria/UBordeaux)

Pascal Frey (UPMC)

Algiane Froehly (Inria/UBordeaux)

Version

5

Copyright

GNU Lesser General Public License.

Function Documentation

MMG5_buildridmet()

int MMG5_buildridmet	(	MMG5_pMesh	mesh,
		MMG5_pSol	met,
		int	np0,
		double	ux,
		double	uy,
		double	uz,
		double	mr[6],
		double	r[3][3]
	)

Parameters

mesh	pointer toward the mesh structure.
met	pointer toward the sol structure.
np0	index of edge's extremity.
ux	distance along x axis.
uy	distance along y axis.
uz	distance along z axis.
mr	computed metric tensor.
r	basis in which the metric is diagona

Returns

1 if success

Build metric tensor at ridge point p0, when computations with respect to p1 are to be held. Store the basis vectors in r.

Remarks

ALGIANE: a mettre à plat : si p0-p1 est une ridge, on peut reconstruire la mauvaise métrique non? Est-ce qu'il ne vaut mieux pas passer la normale au triangle d'où l'on vient en argument pour le choix de la métrique à reconstruire si c'est possible(quand on vient de grad2metSurfreq)?

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MMG5_buildridmetfic()

int MMG5_buildridmetfic ( MMG5_pMesh  mesh, double  t[3], double  n[3], double  dtan, double  dv, double  dn, double  m[6]  )

inline

Parameters

mesh	pointer toward the mesh structure.
t	tangent at the ridge point.
n	normal at the ridge point.
dtan	metric size along the tangent direction.
dv	metric size along the direction.
dn	metric size along the normal direction.
m	computed metric at the ridge point.

Returns

1

Build metric tensor at a fictitious ridge point, whose normal and tangent are provided.

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MMG5_buildridmetnor()

int MMG5_buildridmetnor	(	MMG5_pMesh	mesh,
		MMG5_pSol	met,
		int	np0,
		double	nt[3],
		double	mr[6],
		double	r[3][3]
	)

Parameters

mesh	pointer toward the mesh structure.
met	pointer toward the sol structure.
np0	index of edge's extremity.
nt	normal direction at the ridge point.
mr	computed metric tensor.
r	basis in which the metric is diagonal

Returns

0 if fail, 1 if the metric is build with respect to n1, 2 if it is build with respect to n2.

Build metric tensor at ridge point p0, when the 'good' normal direction is given by nt and store the basis vectors in r.

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MMG5_intersecmet22()

int MMG5_intersecmet22	(	MMG5_pMesh	mesh,
		double *	m,
		double *	n,
		double *	mr
	)

Parameters

mesh	pointer toward the mesh structure.
m	pointer toward a metric.
n	pointer toward a metric.
mr	computed metric.

Returns

0 if fail, 1 otherwise.

Compute the intersected (2 x 2) metric from metrics m and n : take simultaneous reduction, and proceed to truncation in sizes.

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MMG5_intmetsavedir()

int MMG5_intmetsavedir	(	MMG5_pMesh	mesh,
		double *	m,
		double *	n,
		double *	mr
	)

Parameters

mesh	pointer toward the mesh structure.
m	pointer toward the first metric to intersect.
n	pointer toward the second metric to intersect.
mr	pointer toward the computed intersected metric.

Returns

1.

Compute the intersected (2 x 2) metric between metrics m and n, PRESERVING the directions of m. Result is stored in mr.

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MMG5_mmgIntextmet()

int MMG5_mmgIntextmet	(	MMG5_pMesh	mesh,
		MMG5_pSol	met,
		int	np,
		double	me[6],
		double	n[3]
	)

Parameters

mesh	pointer toward the mesh structure.
met	pointer toward the metric structure.
np	global index of vertex in which we intersect the metrics.
me	physical metric at point np.
n	normal or tangent at point np.

Returns

0 if fail, 1 otherwise.

Intersect the surface metric held in np (supported in tangent plane of np) with 3*3 physical metric in me. For ridge points, this function fill the and fields that contains respectively the specific sizes in the and directions.

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MMG5_paratmet()

int MMG5_paratmet	(	double	c0[3],
		double	n0[3],
		double	m[6],
		double	c1[3],
		double	n1[3],
		double	mt[6]
	)

Parameters

c0	table of the coordinates of the starting point.
n0	normal at the starting point.
m	metric to be transported.
c1	table of the coordinates of the ending point.
n1	normal at the ending point.
mt	computed metric.

Returns

0 if fail, 1 otherwise.

Parallel transport of a metric tensor field, attached to point c0, with normal n0, to point c1, with normal n1.

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