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function [lines quality] = AutoSmoothMeshLines( lines, max_res, ratio, varargin)
% function [lines quality] = AutoSmoothMeshLines( lines, max_res, ratio, varargin)
%
% Generate smooth mesh lines by choosing an appropriate algorithm.
%
% Currently supported algorithm:
% SmoothMeshLines, SmoothMeshLines2 and RecursiveSmoothMesh
%
% arguments:
% lines: given fixed lines to create a smooth mesh in between
% max_res: desired max. resolution
% ratio: grading ratio: desired neighboring line-delta ratio
% - default is 1.5
% - see also 'allowed_max_ratio' argument
%
% variable arguments ('keyword',value):
% algorithm: define subset of tried algorihm, e.g. [1 3]
% symmetric: 0/1 force symmetric mesh (default is input symmetry)
% homogeneous: 0/1 force homogeneous mesh
% allowed_min_res: allow a given min resolution only
% allowed_max_ratio: allow only a given max. grading ratio
% (default --> ratio*1.25)
% debug: 0/1 off/on
%
% example:
% lines = AutoSmoothMeshLines([-100 -10 10 100], 20, 1.5, 'algorihm', ...
% 1:3);
%
% See also InitCSX, DefineRectGrid
%
% CSXCAD matlab interface
% -----------------------
% author: Thorsten Liebig (C) 2012
if (nargin<2)
error('CSXCAD:AutoSmoothMeshLines','lines and max_res are a required parameter');
end
if (nargin<3)
ratio = 1.5;
end
lines = sort(unique(lines));
range = lines(end)-lines(1);
if (~isempty(find(diff(lines)<range*1e-6)))
warning('CSXCAD:AutoSmoothMeshLines','some lines found with very small distance which may cause smoothing failure!');
end
methods = {};
methods{end+1} = @SmoothMeshLines;
methods{end+1} = @SmoothMeshLines2;
methods{end+1} = @RecursiveSmoothMesh;
requires_homogen = 0;
requires_symmetric = CheckSymmtricLines(lines);
allowed_min_res = 0;
debug = 0;
max_ratio = ratio*1.25;
algorithm = 1:numel(methods);
for vn=1:2:numel(varargin)
if (strcmpi(varargin{vn},'algorithm'))
algorithm = intersect(varargin{vn+1},algorithm);
end
if (strcmpi(varargin{vn},'symmetric'))
requires_symmetric = varargin{vn+1};
end
if (strcmpi(varargin{vn},'homogeneous'))
requires_homogen = varargin{vn+1};
end
if (strcmpi(varargin{vn},'force_min_res'))
requires_homogen = varargin{vn+1};
end
if (strcmpi(varargin{vn},'allowed_min_res'))
allowed_min_res = varargin{vn+1};
end
if (strcmpi(varargin{vn},'allowed_max_ratio'))
max_ratio = varargin{vn+1};
end
if (strcmpi(varargin{vn},'debug'))
debug = varargin{vn+1};
end
end
for m=algorithm
if (debug>0)
disp(['AutoSmoothMeshLines: trying method: ' func2str(methods{m})]);
tic
end
out_lines{m} = methods{m}(lines, max_res, ratio, 'CheckMesh', false);
if (debug>0)
toc
end
quality(m) = eval_mesh(out_lines{m}, max_res, max_ratio, requires_homogen, requires_symmetric, allowed_min_res, 1);
if (quality(m)==100) % uncomment to release!
lines = out_lines{m};
if (debug>0)
disp(['AutoSmoothMeshLines: The winner with 100% is ' func2str(methods{m})]); % remove to release
end
return
end
end
winner = find(quality==max(quality),1);
lines = out_lines{winner};
if (debug>0)
disp(['New_SmoothMeshLines: The winner with ' num2str(quality(winner)) '% is ' func2str(methods{winner})]); % remove to release
end
% show mesh problems
eval_mesh(lines, max_res, ratio, requires_homogen, requires_symmetric, allowed_min_res, 0);
return
error('CSXCAD:AutoSmoothMeshLines',['unknown algorithm requested: ' algorithm ]);
end
function quality = eval_mesh(lines, max_res, ratio, requires_homogen, requires_symmetric, allowed_min_res, silent)
quality = 100;
results = AnalyseMesh(lines);
if ((requires_homogen==1) && (results.homogeneous~=1))
if (silent==0)
warning('CSXCAD:AutoSmoothMeshLines','method failed to create homogenous mesh');
end
quality = -1;
return
end
if ((requires_symmetric==1) && (results.symmetric~=1))
if (silent==0)
warning('CSXCAD:AutoSmoothMeshLines','method failed to create symmetric mesh');
end
quality = -1;
return
end
if ((allowed_min_res>0) && (results.min_res<allowed_min_res))
if (silent==0)
warning('CSXCAD:AutoSmoothMeshLines','method failed to obey allowed min res!');
end
quality = -1;
return
end
if (results.max_res>max_res*1.01)
if (silent==0)
warning('CSXCAD:AutoSmoothMeshLines',['method failed to fulfill max. res: ' num2str(results.max_res) ' > ' num2str(max_res)]);
end
quality = quality*(max_res/results.max_res);
end
if (results.max_ratio>ratio*1.01)
if (silent==0)
warning('CSXCAD:AutoSmoothMeshLines',['method failed to fulfill the max. ratio: ' num2str(results.max_ratio) ' > ' num2str(ratio)]');
end
quality = quality*(ratio/results.max_ratio);
end
end
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