--- /dev/null
+% KNTUNIFORM: generate uniform open knot vectors in the reference domain.
+%
+% [csi, zeta] = kntuniform (num, degree, regularity)
+%
+% INPUT:
+%
+% num: number of breaks (in each direction)
+% degree: polynomial degree (in each direction)
+% regularity: global regularity (in each direction)
+%
+% OUTPUT:
+%
+% csi: knots
+% zeta: breaks = knots without repetitions
+%
+% Copyright (C) 2009, 2010 Carlo de Falco
+% Copyright (C) 2011 Rafael Vazquez
+%
+% This program is free software: you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation, either version 2 of the License, or
+% (at your option) any later version.
+
+% This program is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+function [csi, zeta] = kntuniform (num, degree, regularity)
+
+ if (numel(num)~=numel(degree) || numel(num)~=numel(regularity))
+ error('kntuniform: num, degree and regularity must have the same length')
+ else
+ for idim=1:numel(num)
+ zeta{idim} = linspace (0, 1, num(idim));
+ rep = degree(idim) - regularity(idim);
+ if (rep > 0)
+ csi{idim} = [zeros(1, degree(idim)+1-rep)...
+ reshape(repmat(zeta{idim}, rep, 1), 1, []) ones(1, degree(idim)+1-rep)];
+ else
+ error ('kntuniform: regularity requested is too high')
+ end
+ end
+ if (numel(num) == 1)
+ csi = csi{1};
+ zeta = zeta{1};
+ end
+ end
+end