v_vector.h File Reference

#include "moab/verdict.h"
#include <cmath>
#include <cassert>

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Functions
double	dot_product (double vec1[], double vec2[])
void	normalize (double vec[])
double *	cross_product (double vec1[], double vec2[], double answer[])
double	length (double vec[])
double	length_squared (double vec[])
double	interior_angle (double vec1[], double vec2[])

Function Documentation

cross_product()

double* cross_product ( double  vec1[], double  vec2[], double  answer[]  )

inline

Definition at line 37 of file v_vector.h.

{
    answer[0] = vec1[1] * vec2[2] - vec1[2] * vec2[1];
    answer[1] = vec1[2] * vec2[0] - vec1[0] * vec2[2];
    answer[2] = vec1[0] * vec2[1] - vec1[1] * vec2[0];
    return answer;
}

dot_product()

double dot_product ( double  vec1[], double  vec2[]  )

inline

Definition at line 20 of file v_vector.h.

{
    double answer = vec1[0] * vec2[0] + vec1[1] * vec2[1] + vec1[2] * vec2[2];
    return answer;
}

Referenced by interior_angle(), v_quad_distortion(), and v_tri_distortion().

interior_angle()

double interior_angle ( double  vec1[], double  vec2[]  )

inline

Definition at line 58 of file v_vector.h.

{
    double cosAngle, angleRad;
    double length1 = length( vec1 );
    double length2 = length( vec2 );
    assert( ( length1 > 0.0 && length2 > 0.0 ) );
 
    cosAngle = dot_product( vec1, vec2 ) / ( length1 * length2 );
 
    if( ( cosAngle > 1.0 ) && ( cosAngle < 1.0001 ) )
    {
        cosAngle = 1.0;
    }
    else if( cosAngle < -1.0 && cosAngle > -1.0001 )
    {
        cosAngle = -1.0;
    }
    else
    {
        assert( cosAngle < 1.0001 && cosAngle > -1.0001 );
    }
 
    angleRad = acos( cosAngle );
    return ( ( angleRad * 180. ) / VERDICT_PI );
}

References dot_product(), length(), and VERDICT_PI.

Referenced by v_tri_quality().

length()

double length ( double  vec[] )

inline

Examples

LaplacianSmoother.cpp, and LloydRelaxation.cpp.

Definition at line 46 of file v_vector.h.

{
    return sqrt( vec[0] * vec[0] + vec[1] * vec[1] + vec[2] * vec[2] );
}

Referenced by moab::angle_robust(), moab::area_coordinates(), MetisPartitioner::assemble_graph(), ZoltanPartitioner::assemble_graph(), MetisPartitioner::assemble_taggedents_graph(), MetisPartitioner::assemble_taggedsets_graph(), ZoltanPartitioner::balance_mesh(), moab::Bvh_tree< _Entity_handles, _Box, _Moab, _Parametrizer >::bucket_index(), moab::BVHTree::Bucket::bucket_index(), moab::GeomQueryTool::closest_to_location(), compute_area(), moab::copy_set_contents(), moab::SysUtil::filesize(), moab::NestedRefine::find_shortest_diagonal_octahedron(), moab::Intx2MeshOnSphere::findNodes(), moab::VarLenSparseTag::get_data_ptr(), moab::SmoothFace::init_facet_control_points(), moab::WriteNCDF::initialize_exodus_file(), interior_angle(), moab::SmoothFace::is_at_vertex(), moab::ReadMCNP5::load_file(), main(), ZoltanPartitioner::mbInitializePoints(), measure(), mhdf_compact_to_ranges(), mhdf_getElemHandles(), mhdf_name_to_path(), MetisPartitioner::partition_mesh(), ZoltanPartitioner::partition_mesh_and_geometry(), ZoltanPartitioner::partition_owned_cells(), perform_laplacian_smoothing(), perform_lloyd_relaxation(), moab::LloydSmoother::perform_smooth(), moab::TreeNodePrinter::print_geometry(), moab::SmoothFace::project_to_facets(), moab::SmoothFace::project_to_patch(), moab::AffineXform::rotation(), moab::SmoothCurve::u_from_position(), v_quad_distortion(), v_quad_maximum_angle(), v_quad_minimum_angle(), v_quad_scaled_jacobian(), v_tet_aspect_beta(), v_tet_quality(), v_tet_radius_ratio(), v_tri_quality(), and v_tri_scaled_jacobian().

length_squared()

double length_squared ( double  vec[] )

inline

Definition at line 52 of file v_vector.h.

{
    return ( vec[0] * vec[0] + vec[1] * vec[1] + vec[2] * vec[2] );
}

Referenced by moab::LinearTet::evaluate_reverse(), moab::LinearTri::evaluate_reverse(), moab::SmoothFace::facet_area_coordinate(), moab::MergeMesh::find_merged_to(), moab::Intx2MeshInPlane::findNodes(), moab::IntxRllCssphere::findNodes(), moab::IntxUtils::intersect_great_circle_arc_with_clat_arc(), main(), moab::FBEngine::split_quads(), moab::SmoothCurve::u_from_position(), v_hex_quality(), v_quad_quality(), v_quad_shape(), v_tet_aspect_beta(), v_tet_quality(), v_tet_radius_ratio(), and v_tet_scaled_jacobian().

normalize()

void normalize ( double  vec[] )

inline

Definition at line 27 of file v_vector.h.

{
    double x = sqrt( vec[0] * vec[0] + vec[1] * vec[1] + vec[2] * vec[2] );
 
    vec[0] /= x;
    vec[1] /= x;
    vec[2] /= x;
}

Referenced by moab::Coupler::interpolate(), moab::DataCoupler::interpolate(), v_quad_quality(), v_quad_skew(), and v_quad_warpage().