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1 classdef EmptyGrid < grid.Grid
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2 properties
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3 dim
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4 end
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5
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6 methods
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7 function obj = EmptyGrid(D)
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8 obj.dim = D;
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9 end
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10 % n returns the number of points in the grid
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11 function o = N(obj)
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12 o = 0;
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13 end
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14
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15 % d returns the spatial dimension of the grid
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16 function o = D(obj)
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17 o = obj.dim;
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18 end
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19
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20 % points returns a n x d matrix containing the coordinates for all points.
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21 function X = points(obj)
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22 X = sparse(0,obj.dim);
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23 end
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24
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25 % Restricts the grid function gf on obj to the subgrid g.
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26 function gf = restrictFunc(obj, gf, g)
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27 error('Restrict does not make sense for an empty grid')
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28 end
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29
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30 % Projects the grid function gf on obj to the grid g.
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31 function gf = projectFunc(obj, gf, g)
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32 error('Project does not make sense for an empty grid')
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33 end
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34
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35 % Return the grid.boundaryIdentifiers of all boundaries in a cell array.
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36 function bs = getBoundaryNames(obj)
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37 bs = {};
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38 end
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39
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40 % Return coordinates for the given boundary
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41 function b = getBoundary(obj, name)
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42 b = sparse(0,obj.dim-1);
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43 end
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44 end
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45 end |
