moab::Util Class Reference

Utility functions for computational geometry and mathematical calculations. More...

#include <Util.hpp>

Static Public Member Functions
template<typename T >
static bool	is_finite (T value)
static void	normal (Interface *MB, EntityHandle handle, double &x, double &y, double &z)
static void	centroid (Interface *MB, EntityHandle handle, CartVect &coord)
Private Member Functions
	Util ()

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Detailed Description

Utility functions for computational geometry and mathematical calculations.

Definition at line 42 of file Util.hpp.

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Constructor & Destructor Documentation

moab::Util::Util

(

)

[inline, private]

Definition at line 59 of file Util.hpp.

{}

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Member Function Documentation

void moab::Util::centroid	(	Interface *	MB,
		EntityHandle	handle,
		CartVect &	coord
	)		[static]

Definition at line 78 of file Util.cpp.

References ErrorCode, moab::Interface::get_connectivity(), moab::Interface::get_coords(), and MB_CHK_SET_ERR_RET.

{
    const EntityHandle* connectivity = NULL;
    int number_nodes                 = 0;
    // TODO make the return value nonvoid
    ErrorCode rval = MB->get_connectivity( handle, connectivity, number_nodes, true );MB_CHK_SET_ERR_RET( rval, "can't get_connectivity" );

    coord[0] = coord[1] = coord[2] = 0.0;

    for( int i = 0; i < number_nodes; i++ )
    {
        double node_coords[3];
        MB->get_coords( &( connectivity[i] ), 1, node_coords );

        coord[0] += node_coords[0];
        coord[1] += node_coords[1];
        coord[2] += node_coords[2];
    }

    coord[0] /= (double)number_nodes;
    coord[1] /= (double)number_nodes;
    coord[2] /= (double)number_nodes;
}

template<typename T >

template bool moab::Util::is_finite< double >

(

T

value

)

[inline, static]

Definition at line 63 of file Util.hpp.

References moab_isfinite.

Referenced by moab::ReadMCNP5::average_tally_values(), moab::Matrix3::invert(), moab::point_perp(), moab::AdaptiveKDTree::ray_intersect_triangles(), moab::ReadMCNP5::read_element_values_and_errors(), moab::GeomUtil::segment_box_intersect(), and moab::BSPTree::set_split_plane().

{
    return moab_isfinite( (double)value );
}

void moab::Util::normal	(	Interface *	MB,
		EntityHandle	handle,
		double &	x,
		double &	y,
		double &	z
	)		[static]

temporary normal function for MBEntities. This should be moved to an appropriate MB algorithms file

Definition at line 42 of file Util.cpp.

References ErrorCode, moab::Interface::get_connectivity(), moab::Interface::get_coords(), and MB_CHK_SET_ERR_RET.

Referenced by moab::Skinner::has_larger_angle().

{
    // get connectivity
    const EntityHandle* connectivity = NULL;
    int number_nodes                 = 0;
    // TODO make the return value nonvoid
    ErrorCode rval = MB->get_connectivity( handle, connectivity, number_nodes, true );MB_CHK_SET_ERR_RET( rval, "can't get_connectivity" );
    assert( number_nodes >= 3 );

    // get_coordinates
    double coords[3][3];
    MB->get_coords( &( connectivity[0] ), 1, coords[0] );
    MB->get_coords( &( connectivity[1] ), 1, coords[1] );
    MB->get_coords( &( connectivity[2] ), 1, coords[2] );

    double vecs[2][3];
    vecs[0][0] = coords[1][0] - coords[0][0];
    vecs[0][1] = coords[1][1] - coords[0][1];
    vecs[0][2] = coords[1][2] - coords[0][2];
    vecs[1][0] = coords[2][0] - coords[0][0];
    vecs[1][1] = coords[2][1] - coords[0][1];
    vecs[1][2] = coords[2][2] - coords[0][2];

    x = vecs[0][1] * vecs[1][2] - vecs[0][2] * vecs[1][1];
    y = vecs[0][2] * vecs[1][0] - vecs[0][0] * vecs[1][2];
    z = vecs[0][0] * vecs[1][1] - vecs[0][1] * vecs[1][0];

    double mag = sqrt( x * x + y * y + z * z );
    if( mag > std::numeric_limits< double >::epsilon() )
    {
        x /= mag;
        y /= mag;
        z /= mag;
    }
}

List of all members.

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The documentation for this class was generated from the following files:

• Util.hpp
• Util.cpp