volmap2mesh.m

function [node, elem, face] = volmap2mesh(img, ix, iy, iz, elemnum, maxvol, thickness, Amat, Bvec)
%
% [node,elem,face]=volmap2mesh(img,ix,iy,iz,thickness,elemnum,maxvol,A,B)
%
% convert a binary volume to tetrahedral mesh followed by an Affine transform
%
% author: Qianqian Fang (q.fang at neu.edu)
% date:   2008/01/12
%
% input:
%        img, ix,iy,iz, elemnum and  maxvol: see vol2mesh.m
%        thickness: scale z-dimension of the mesh to specified thickness,
%                   if thickness==0, scaling is bypassed
%        Amat: a 3x3 transformation matrix
%        Bvec: a 3x1 vector
%        Amat and Bvec maps the image index space to real world coordnate system by
%                   [x,y,z]_new=Amat*[x,y,z]_old+Bvec
%
% -- this function is part of iso2mesh toolbox (http://iso2mesh.sf.net)
%

[node, elem, face] = vol2mesh(img, ix, iy, iz, elemnum, maxvol);

node(:, 1:3) = (Amat * node(:, 1:3)' + repmat(Bvec(:), 1, size(node, 1)))';

if (thickness)
    zmin = min(node(:, 3));
    zmax = max(node(:, 3));
    node(:, 3) = (node(:, 3) - zmin) / (zmax - zmin) * thickness;
end