Various tools for the mmg libraries. More...

#include "mmgcommon_private.h"

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Functions
void	MMG5_nsort (int8_t n, double val, int8_t perm)

void	MMG5_nperm (int8_t n, int8_t shift, int8_t stride, double val, double oldval, int8_t *perm)

int	MMG5_devangle (double n1, double n2, double crit)

int	MMG5_nonUnitNorPts (MMG5_pMesh mesh, MMG5_int ip1, MMG5_int ip2, MMG5_int ip3, double *n)

double	MMG5_nonorsurf (MMG5_pMesh mesh, MMG5_pTria pt)

int	MMG5_norpts (MMG5_pMesh mesh, MMG5_int ip1, MMG5_int ip2, MMG5_int ip3, double *n)

int	MMG5_nortri (MMG5_pMesh mesh, MMG5_pTria pt, double *n)

void	MMG5_transpose3d (double m[3][3])

int	MMG5_test_transpose3d ()

void	MMG5_dotprod (int8_t dim, double a, double b, double *result)

int	MMG5_test_dotprod ()

void	MMG5_crossprod3d (double a, double b, double *result)

int	MMG5_test_crossprod3d ()

void	MMG5_mn (double m[6], double n[6], double mn[9])

int	MMG5_test_mn ()

int	MMG5_rmtr (double r[3][3], double m[6], double mr[6])

int	MMG5_test_rmtr ()

int	MMG5_rotmatrix (double n[3], double r[3][3])

int	MMG5_test_rotmatrix ()

int	MMG5_invmat (double m, double mi)

int	MMG5_invmatg (double m[9], double mi[9])

int	MMG5_invmat33 (double m[3][3], double mi[3][3])

int	MMG5_invmat22 (double m[2][2], double mi[2][2])

int	MMG5_sys33sym (double a[6], double b[3], double r[3])

void	MMG5_printTria (MMG5_pMesh mesh, char *fileName)

size_t	MMG5_memSize (void)

void	MMG5_memOption_memSet (MMG5_pMesh mesh)

double	MMG5_det3pt1vec (double c0[3], double c1[3], double c2[3], double v[3])

double	MMG5_det4pt (double c0[3], double c1[3], double c2[3], double c3[3])

double	MMG5_orvol (MMG5_pPoint point, MMG5_int *v)

double	MMG2D_quickarea (double a[2], double b[2], double c[2])

void	MMG5_mark_verticesAsUnused (MMG5_pMesh mesh)

void	MMG5_mark_usedVertices (MMG5_pMesh mesh, void(*delPt)(MMG5_pMesh, MMG5_int))

void	MMG5_keep_subdomainElts (MMG5_pMesh mesh, int nsd, int(*delElt)(MMG5_pMesh, MMG5_int))

double	MMG5_test_mat_error (int8_t nelem, double m1[], double m2[])

int	MMG5_test_invmat22 ()

int	MMG5_test_invmat33 ()

Detailed Description

Various tools for the mmg libraries.

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.

Todo: doxygen documentation.

Definition in file tools.c.

Function Documentation

◆ MMG2D_quickarea()

double MMG2D_quickarea	(	double	a[2],
		double	b[2],
		double	c[2] )

Parameters

a	point coordinates
b	point coor
c	point coor

Compute tria area.

Definition at line 971 of file tools.c.

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◆ MMG5_crossprod3d()

void MMG5_crossprod3d	(	double *	a,
		double *	b,
		double *	result )

Parameters

a	first array
b	second array
result	cross product of the two arrays

Compute cross product of two double precision arrays in 3D.

Definition at line 300 of file tools.c.

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◆ MMG5_det3pt1vec()

double MMG5_det3pt1vec	(	double	c0[3],
		double	c1[3],
		double	c2[3],
		double	v[3] )

inline

Compute 3 * 3 determinant : det(c1-c0,c2-c0,v)

Definition at line 920 of file tools.c.

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◆ MMG5_det4pt()

double MMG5_det4pt	(	double	c0[3],
		double	c1[3],
		double	c2[3],
		double	c3[3] )

inline

Compute 3 * 3 determinant : det(c1-c0,c2-c0,c3-c0)

Definition at line 932 of file tools.c.

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◆ MMG5_devangle()

int MMG5_devangle	(	double *	n1,
		double *	n2,
		double	crit )

Parameters

n1	first normal
n2	second normal
crit	ridge threshold

Returns: 1 if success, 0 if fail

Check if the angle between n1 and n2 is larger than the ridge criterion. If yes, return 1, 0 otherwise (ridge creation).

Definition at line 103 of file tools.c.

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◆ MMG5_dotprod()

void MMG5_dotprod	(	int8_t	dim,
		double *	a,
		double *	b,
		double *	result )

Parameters

dim	size of the array
a	first array
b	second array
result	scalar product of the two arrays

Compute scalar product of two double precision arrays.

Definition at line 265 of file tools.c.

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◆ MMG5_invmat()

int MMG5_invmat	(	double *	m,
		double *	mi )

Parameters

m	pointer toward a 3x3 symetric matrix
mi	pointer toward the computed 3x3 matrix.

Invert m (3x3 symetric matrix) and store the result on mi

Definition at line 562 of file tools.c.

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◆ MMG5_invmat22()

int MMG5_invmat22	(	double	m[2][2],
		double	mi[2][2] )

Parameters

m	initial matrix.
mi	inverted matrix.

Invert 2x2 non-symmetric matrix stored in 2 dimensions

Definition at line 745 of file tools.c.

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◆ MMG5_invmat33()

int MMG5_invmat33	(	double	m[3][3],
		double	mi[3][3] )

Parameters

m	initial matrix.
mi	inverted matrix.

Invert 3x3 non-symmetric matrix stored in 2 dimensions

Definition at line 653 of file tools.c.

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◆ MMG5_invmatg()

int MMG5_invmatg	(	double	m[9],
		double	mi[9] )

Parameters

m	initial matrix.
mi	inverted matrix.

Invert 3x3 non-symmetric matrix.

Definition at line 613 of file tools.c.

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◆ MMG5_keep_subdomainElts()

void MMG5_keep_subdomainElts	(	MMG5_pMesh	mesh,
		int	nsd,
		int(*	delElt )(MMG5_pMesh, MMG5_int) )

Parameters

mesh	pointer toward the mesh structure.
nsd	subdomain index.
delElt	function to call to delete elt.

Remove triangles that do not belong to subdomain of index nsd

Definition at line 1072 of file tools.c.

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◆ MMG5_mark_usedVertices()

void MMG5_mark_usedVertices	(	MMG5_pMesh	mesh,
		void(*	delPt )(MMG5_pMesh, MMG5_int) )

Parameters

mesh	pointer toward the mesh structure.
delPt	function to call to delete point.

Mark the mesh vertices that belong to triangles or quadrangles as used (for Mmgs or Mmg2d).

Definition at line 1018 of file tools.c.

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◆ MMG5_mark_verticesAsUnused()

void MMG5_mark_verticesAsUnused ( MMG5_pMesh mesh )

Parameters

mesh	pointer toward the mesh structure.

Mark all mesh vertices as unused.

Definition at line 994 of file tools.c.

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◆ MMG5_memOption_memSet()

void MMG5_memOption_memSet ( MMG5_pMesh mesh )

Parameters

mesh	pointer toward the mesh structure

Set the memMax value to its "true" value if memory asked by user. Here the MMG5_MEMPERCENT coef is already applied on memMax.

Definition at line 891 of file tools.c.

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◆ MMG5_memSize()

size_t MMG5_memSize ( void )

Returns: the available memory size of the computer.

Compute the available memory size of the computer.

Definition at line 852 of file tools.c.

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◆ MMG5_mn()

void MMG5_mn	(	double	m[6],
		double	n[6],
		double	mn[9] )

Parameters

m	symmetric matrix
n	symmetric matrix
mn	result

Compute product m*n (mn stored by rows for consistency with MMG5_eigenv3d).

Definition at line 337 of file tools.c.

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◆ MMG5_nonorsurf()

double MMG5_nonorsurf	(	MMG5_pMesh	mesh,
		MMG5_pTria	pt )

inline

Parameters

mesh	pointer toward the mesh stucture.
pt	triangle for which we compute the surface.

Returns: the computed surface

Compute non-oriented surface area of a triangle.

Definition at line 160 of file tools.c.

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◆ MMG5_nonUnitNorPts()

int MMG5_nonUnitNorPts	(	MMG5_pMesh	mesh,
		MMG5_int	ip1,
		MMG5_int	ip2,
		MMG5_int	ip3,
		double *	n )

inline

Parameters

mesh	pointer toward the mesh stucture.
ip1	first point of face.
ip2	second point of face.
ip3	third point of face.
n	pointer to store the computed normal.

Returns: 1

Compute non-normalized face normal given three points on the surface.

Definition at line 127 of file tools.c.

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◆ MMG5_norpts()

int MMG5_norpts	(	MMG5_pMesh	mesh,
		MMG5_int	ip1,
		MMG5_int	ip2,
		MMG5_int	ip3,
		double *	n )

inline

Parameters

mesh	pointer toward the mesh stucture.
ip1	first point of face.
ip2	second point of face.
ip3	third point of face.
n	pointer to store the computed normal.

Returns: 1 if success, 0 otherwise.

Compute normalized face normal given three points on the surface.

Definition at line 183 of file tools.c.

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◆ MMG5_nortri()

int MMG5_nortri	(	MMG5_pMesh	mesh,
		MMG5_pTria	pt,
		double *	n )

inline

Parameters

mesh	pointer toward the mesh stucture.
pt	pointer toward the triangle structure.
n	pointer to store the computed normal.

Returns: 1

Compute triangle normal.

Definition at line 209 of file tools.c.

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◆ MMG5_nperm()

void MMG5_nperm	(	int8_t	n,
		int8_t	shift,
		int8_t	stride,
		double *	val,
		double *	oldval,
		int8_t *	perm )

inline

Parameters

n	array size
shift	shift to apply when taking array value
stride	stride to apply when taking array value
val	array of double precision floating points
oldval	array to store input values
perm	permutation array

Naively permute a small array. Use shift and stride to eventually permute matrix columns.

Remarks: to use only on very small arrays such as metric tensors (size lower than int8_max).

Definition at line 80 of file tools.c.

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◆ MMG5_nsort()

void MMG5_nsort	(	int8_t	n,
		double *	val,
		int8_t *	perm )

inline

Parameters

n	array size
val	array of double precision floating points
perm	permutation array

naive (increasing) sorting algorithm, for very small tabs ; permutation is stored in perm

Remarks: to use only on very small arrays such as metric tensors (size lower than int8_max).

Definition at line 49 of file tools.c.

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◆ MMG5_orvol()

double MMG5_orvol	(	MMG5_pPoint	point,
		MMG5_int *	v )

inline

Parameters

point	Pointer toward the points array
v	pointer toward the point indices

Returns: the oriented volume of tetra

Compute oriented volume of a tetrahedron (x6)

Definition at line 951 of file tools.c.

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◆ MMG5_printTria()

void MMG5_printTria	(	MMG5_pMesh	mesh,
		char *	fileName )

Parameters

mesh	pointer toward the mesh structure.
fileName	pointer toward the file name.

Debug function (not use in clean code): write mesh->tria structure in file.

Definition at line 825 of file tools.c.

◆ MMG5_rmtr()

int MMG5_rmtr	(	double	r[3][3],
		double	m[6],
		double	mr[6] )

inline

Parameters

r	3x3 matrix
m	symetric matrix
mr	result

Returns: 1

Compute product R*M*tR when M is symmetric

Definition at line 405 of file tools.c.

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◆ MMG5_rotmatrix()

int MMG5_rotmatrix	(	double	n[3],
		double	r[3][3] )

inline

Parameters

n	pointer toward the vector that we want to send on the third vector of canonical basis.
r	computed rotation matrix.

Compute rotation matrix that sends vector n to the third vector of canonical basis.

Definition at line 467 of file tools.c.

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◆ MMG5_sys33sym()

int MMG5_sys33sym	(	double	a[6],
		double	b[3],
		double	r[3] )

inline

Parameters

a	matrix to invert.
b	last member.
r	vector of unknowns.

Returns: 0 if fail, 1 otherwise.

Solve $3\times 3$ symmetric system $ A . r = b $ .

Definition at line 769 of file tools.c.

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◆ MMG5_test_crossprod3d()

int MMG5_test_crossprod3d ( )

Returns: 1 if success, 0 if fail.

Test vector cross product.

Definition at line 311 of file tools.c.

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◆ MMG5_test_dotprod()

int MMG5_test_dotprod ( )

Returns: 1 if success, 0 if fail.

Test vector scalar product.

Definition at line 276 of file tools.c.

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◆ MMG5_test_invmat22()

int MMG5_test_invmat22 ( )

Test inversion of 2x2 non-symmetric matrix stored in 2 dimensions.

Definition at line 1140 of file tools.c.

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◆ MMG5_test_invmat33()

int MMG5_test_invmat33 ( )

Test inversion of 3x3 non-symmetric matrix stored in 2 dimensions.

Definition at line 1165 of file tools.c.

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◆ MMG5_test_mat_error()

double MMG5_test_mat_error	(	int8_t	nelem,
		double	m1[],
		double	m2[] )

inline

Parameters

nelem	number of matrix elements.
m1	first matrix (single array).
m2	second matrix (single array).

Compute maximum error between two matrices.

Definition at line 1123 of file tools.c.

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◆ MMG5_test_mn()

int MMG5_test_mn ( )

Test product of 3x3 symmetric matrices.

Compute product m*n

Compute product n*m

Definition at line 357 of file tools.c.

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◆ MMG5_test_rmtr()

int MMG5_test_rmtr ( )

inline

Test computation of product R*M*tR when M is symmetric

Compute transformation

Definition at line 435 of file tools.c.

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◆ MMG5_test_rotmatrix()

int MMG5_test_rotmatrix ( )

Test computation of the rotation matrix that sends vector n to the third vector of canonical basis.

Rodrigues' rotation formula (transposed to give a map from n to [0,0,1]). Input vector must be a unit vector.

Approximate z-unit vector

Check orthonormality

Definition at line 512 of file tools.c.

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◆ MMG5_test_transpose3d()

int MMG5_test_transpose3d ( )

Returns: 1 if success, 0 if fail.

Test the transposition of a 3x3 matrix.

Definition at line 236 of file tools.c.

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◆ MMG5_transpose3d()

void MMG5_transpose3d ( double m[3][3] )

Parameters

m	matrix (stored as double array)

Transpose a square matrix in 3D, stored as double array.

Definition at line 220 of file tools.c.

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Functions

Detailed Description

Function Documentation

◆ MMG2D_quickarea()

◆ MMG5_crossprod3d()

◆ MMG5_det3pt1vec()

◆ MMG5_det4pt()

◆ MMG5_devangle()

◆ MMG5_dotprod()

◆ MMG5_invmat()

◆ MMG5_invmat22()

◆ MMG5_invmat33()

◆ MMG5_invmatg()

◆ MMG5_keep_subdomainElts()

◆ MMG5_mark_usedVertices()

◆ MMG5_mark_verticesAsUnused()

◆ MMG5_memOption_memSet()

◆ MMG5_memSize()

◆ MMG5_mn()

◆ MMG5_nonorsurf()

◆ MMG5_nonUnitNorPts()

◆ MMG5_norpts()

◆ MMG5_nortri()

◆ MMG5_nperm()

◆ MMG5_nsort()

◆ MMG5_orvol()

◆ MMG5_printTria()

◆ MMG5_rmtr()

◆ MMG5_rotmatrix()

◆ MMG5_sys33sym()

◆ MMG5_test_crossprod3d()

◆ MMG5_test_dotprod()

◆ MMG5_test_invmat22()

◆ MMG5_test_invmat33()

◆ MMG5_test_mat_error()

◆ MMG5_test_mn()

◆ MMG5_test_rmtr()

◆ MMG5_test_rotmatrix()

◆ MMG5_test_transpose3d()

◆ MMG5_transpose3d()