ng_extract_face

PURPOSE ^

This function takes the wireframe model created by readmesh

SYNOPSIS ^

function[fcsrf,fci] = ng_extract_face(srf,vtx,fc,fcnmb)

DESCRIPTION ^

 This function takes the wireframe model created by readmesh
 and extracts one of the faces (fcnmb) into an indices
 matrix (fci) mapped on to indices matrix srf which, in turn,
 maps on to vtx. It also creates a matrix (fcsrf) which
 directly maps this face into vtx.

 Version 2.4
 B.D.Grieve - 23/01/2002


 srf      = The boundary surfaces
 vtx      = The vertices matrix
 fc       = The face numbers to which each surface belong
 fcnmb    = The number of the face to be extracted
 fcsrf    = The indices into the vtx matrix for this face
 fci      = The indices into the srf matrix of this face

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 function[fcsrf,fci] = ng_extract_face(srf,vtx,fc,fcnmb)
0002 
0003 % This function takes the wireframe model created by readmesh
0004 % and extracts one of the faces (fcnmb) into an indices
0005 % matrix (fci) mapped on to indices matrix srf which, in turn,
0006 % maps on to vtx. It also creates a matrix (fcsrf) which
0007 % directly maps this face into vtx.
0008 %
0009 % Version 2.4
0010 % B.D.Grieve - 23/01/2002
0011 %
0012 %
0013 % srf      = The boundary surfaces
0014 % vtx      = The vertices matrix
0015 % fc       = The face numbers to which each surface belong
0016 % fcnmb    = The number of the face to be extracted
0017 % fcsrf    = The indices into the vtx matrix for this face
0018 % fci      = The indices into the srf matrix of this face
0019 
0020  fci  = find( fc == fcnmb );
0021  fcsrf= srf(fci,:);
0022 
0023  return 
0024 % OLDER, COMPLICATED CODE
0025 fcsrf = [];
0026 fci = [];
0027 for loop1 = 1:size(fc,1)
0028     if fc(loop1)==fcnmb
0029         fcsrf = [fcsrf; srf(loop1,:)]; % Concatenate fcsrf to map directly with vtx for this face
0030         fci = [fci; loop1]; % Concatenate fci with srf indices for this face
0031     end
0032 end

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