Commit 9687b1fc by Pierre Cazenave

### Add new function to find surrounding nodes for a given node. This was ported...

`Add new function to find surrounding nodes for a given node. This was ported from the Python FVCOM toolbox (PyFVCOM).`
parent ba0132f5
 function nodes = surrounders(n, triangles) % Return the IDs of the nodes surrounding node number `n'. % % INPUTS: % n % Node ID around which to find the connected nodes. % triangles % Triangulation matrix to find the connected nodes. % % OUTPUTS: % surroundingidx % Indices of the surrounding nodes. % % Author(s): % Pierre Cazenave (Plymouth Marine Laboratory) % % Revision history: % 2015-02-19 First version based on the PyFVCOM.grid_tools surrounders % function. % % Notes: % % Check it works with: % [x, y] = meshgrid(1:25, 100:125); % x = x(:) + randn(numel(x), 1) * 0.1; % y = y(:) + randn(numel(y), 1) * 0.1; % tri = delaunay([x, y]); % for n = linspace(1, length(x) - 1, 5) % aa = surrounders(n, tri) % figure % triplot(x, y, tri) % plot(x(n), y(n), 'ro') % plot(x(aa), y(aa), 'ko') % xlim(min(x(aa)) - 1, max(x(aa)) + 1) % ylim(min(y(aa)) - 1, max(y(aa)) + 1) % legend % end eidx = max((abs(triangles - n) == 0), [], 2); nodes = unique(triangles(triangles(eidx) ~= n, :));
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