moab::Util Class Reference

Utility functions for normal and centroid for entities. More...

#include <Util.hpp>

List of all members.

Static Public Member Functions
static void	normal (Interface *MB, EntityHandle handle, double &x, double &y, double &z)
static void	centroid (Interface *MB, EntityHandle handle, Coord &coord)
Private Member Functions
	Util ()

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Detailed Description

Utility functions for normal and centroid for entities.

Definition at line 37 of file Util.hpp.

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Constructor & Destructor Documentation

moab::Util::Util

(

)

[inline, private]

Definition at line 51 of file Util.hpp.

{}

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Member Function Documentation

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

Definition at line 80 of file Util.cpp.

{
   const EntityHandle *connectivity;
   int number_nodes = 0;
   MB->get_connectivity(handle, connectivity, number_nodes,true);
   
   coord.x=0.0;
   coord.y=0.0;
   coord.z=0.0;

   for(int i = 0; i< number_nodes; i++)
   {
      double node_coords[3];
      MB->get_coords(&(connectivity[i]), 1, node_coords);
     
      coord.x+=node_coords[0];
      coord.y+=node_coords[1];
      coord.z+=node_coords[2];
   }
   
   coord.x/=(double)number_nodes;
   coord.y/=(double)number_nodes;
   coord.z/=(double)number_nodes;
}

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 45 of file Util.cpp.

{
   // get connectivity
   const EntityHandle *connectivity;
   int number_nodes = 0;
   MB->get_connectivity(handle, connectivity, number_nodes, true);
   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;
   }
}

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

• Util.hpp
• Util.cpp