V_EdgeMetric.cpp

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    1 /*=========================================================================
    2  
    3   Module:    $RCSfile: V_EdgeMetric.cpp,v $
    4  
    5   Copyright (c) 2006 Sandia Corporation.
    6   All rights reserved.
    7   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
    8  
    9      This software is distributed WITHOUT ANY WARRANTY; without even
   10      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
   11      PURPOSE.  See the above copyright notice for more information.
   12  
   13 =========================================================================*/
   14  
   15 /*
   16  *
   17  * V_EdgeMetric.cpp contains quality calcultions for edges
   18  *
   19  * This file is part of VERDICT
   20  *
   21  */
   22  
   23 #define VERDICT_EXPORTS
   24  
   25 #include "moab/verdict.h"
   26 #include <cmath>
   27  
   28 /*!
   29   length of and edge
   30   length is calculated by taking the distance between the end nodes
   31  */
   32 C_FUNC_DEF double v_edge_length( int /*num_nodes*/, double coordinates[][3] )
   33 {
   34  
   35     double x = coordinates[1][0] - coordinates[0][0];
   36     double y = coordinates[1][1] - coordinates[0][1];
   37     double z = coordinates[1][2] - coordinates[0][2];
   38     return (double)( sqrt( x * x + y * y + z * z ) );
   39 }
   40  
   41 /*!
   42  
   43   higher order function for calculating multiple metrics at once.
   44  
   45   for an edge, there is only one metric, edge length.
   46 */
   47  
   48 C_FUNC_DEF void edge_quality( int num_nodes,
   49                               double coordinates[][3],
   50                               unsigned int metrics_request_flag,
   51                               struct EdgeMetricVals* metric_vals )
   52 {
   53     if( metrics_request_flag & V_EDGE_LENGTH ) metric_vals->length = v_edge_length( num_nodes, coordinates );
   54 }