--- /dev/null
+## Copyright (C) 2007-2012 David Bateman
+##
+## This file is part of Octave.
+##
+## Octave 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 3 of the License, or (at
+## your option) any later version.
+##
+## Octave 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 Octave; see the file COPYING. If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {[@var{c}, @var{hg}] =} __contour__ (@dots{})
+## Undocumented internal function.
+## @end deftypefn
+
+function [c, hg] = __contour__ (varargin)
+ ax = varargin{1};
+ zlevel = varargin{2};
+ filled = "off";
+
+ linespec.linestyle = "-";
+ linespec.color = "auto";
+ edgecolor = "flat";
+ for i = 3 : nargin
+ arg = varargin {i};
+ if ((ischar (arg) || iscell (arg)))
+ [linespec, valid] = __pltopt__ ("__contour__", arg, false);
+ if (isempty (linespec.color))
+ linespec.color = "auto";
+ endif
+ if (isempty (linespec.linestyle))
+ linespec.linestyle = "-";
+ endif
+ if (valid)
+ have_line_spec = true;
+ varargin(i) = [];
+ break;
+ endif
+ endif
+ endfor
+
+ opts = {};
+ i = 3;
+ while (i < length (varargin))
+ if (ischar (varargin {i}))
+ if (strcmpi (varargin{i}, "fill"))
+ filled = varargin {i + 1};
+ varargin(i:i+1) = [];
+ elseif (strcmpi (varargin{i}, "linecolor"))
+ linespec.color = varargin {i + 1};
+ edgecolor = linespec.color;
+ if (ischar (edgecolor) && strcmpi (edgecolor, "auto"))
+ edgecolor = "flat";
+ endif
+ varargin(i:i+1) = [];
+ elseif (strcmpi (varargin{i}, "edgecolor"))
+ linespec.color = varargin {i + 1};
+ edgecolor = linespec.color;
+ if (ischar (edgecolor) && strcmpi (edgecolor, "flat"))
+ linespec.color = "auto";
+ endif
+ varargin(i:i+1) = [];
+ else
+ opts{end+1} = varargin{i};
+ varargin(i) = [];
+ opts{end+1} = varargin{i};
+ varargin(i) = [];
+ endif
+ else
+ i++;
+ endif
+ endwhile
+
+ if (length(varargin) < 5)
+ z1 = varargin{3};
+ x1 = 1 : columns(z1);
+ y1 = 1 : rows(z1);
+ else
+ x1 = varargin{3};
+ y1 = varargin{4};
+ z1 = varargin{5};
+ endif
+ if (!ismatrix (z1) || isvector (z1) || isscalar (z1))
+ error ("__contour__: z argument must be a matrix");
+ endif
+ if (length (varargin) == 4 || length (varargin) == 6)
+ vn = varargin {end};
+ vnauto = false;
+ else
+ vnauto = true;
+ vn = 10;
+ endif
+
+ if (isscalar (vn))
+ lvl = linspace (min (z1(!isinf(z1))), max (z1(!isinf(z1))),
+ vn + 2)(1:end-1);
+ else
+ lvl = vn;
+ endif
+
+ if (strcmpi (filled, "on"))
+ if (isvector (x1) || isvector (y1))
+ [x1, y1] = meshgrid (x1, y1);
+ endif
+ [nr, nc] = size (z1);
+ x0 = prepad(x1, nc+1, 2 * x1(1, 1) - x1(1, 2), 2);
+ x0 = postpad(x0, nc+2, 2 * x1(1, nc) - x1(1, nc - 1), 2);
+ x0 = [x0(1, :); x0; x0(1, :)];
+ y0 = prepad(y1, nr+1, 2 * y1(1, 1) - y1(2, 1), 1);
+ y0 = postpad(y0, nr+2, 2 * y1(nr, 1) - y1(nr - 1, 1));
+ y0 = [y0(:, 1), y0, y0(:, 1)];
+ z0 = -Inf(nr+2, nc+2);
+ z0(2:nr+1, 2:nc+1) = z1;
+ [c, lev] = contourc (x0, y0, z0, lvl);
+ else
+ [c, lev] = contourc (x1, y1, z1, lvl);
+ endif
+
+ hg = hggroup ();
+ opts = __add_datasource__ ("__countour__", hg, {"x", "y", "z"}, opts{:});
+
+ addproperty ("xdata", hg, "data", x1);
+ addproperty ("ydata", hg, "data", y1);
+ addproperty ("zdata", hg, "data", z1);
+ addproperty ("contourmatrix", hg, "data", c);
+
+ addlistener (hg, "xdata", @update_data);
+ addlistener (hg, "ydata", @update_data);
+ addlistener (hg, "zdata", @update_data);
+ addlistener (hg, "contourmatrix", @update_data);
+
+ addproperty ("fill", hg, "radio", "on|{off}", filled);
+
+ ## The properties zlevel and zlevelmode don't exist in matlab, but
+ ## allow the use of contourgroups with the contour3, meshc and surfc
+ ## functions.
+ if (isnumeric (zlevel))
+ addproperty ("zlevelmode", hg, "radio", "{none}|auto|manual", "manual");
+ addproperty ("zlevel", hg, "data", zlevel);
+ else
+ addproperty ("zlevelmode", hg, "radio", "{none}|auto|manual", zlevel);
+ if (ischar (zlevel) && strcmpi (zlevel, "manual"))
+ z = varargin{3};
+ z = 2 * (min (z(:)) - max (z(:)));
+ addproperty ("zlevel", hg, "data", z);
+ else
+ addproperty ("zlevel", hg, "data", 0.);
+ endif
+ endif
+
+ lvlstep = sum (abs (diff (lvl))) / (length (lvl) - 1);
+
+ addproperty ("levellist", hg, "data", lev);
+ addproperty ("levelstep", hg, "double", lvlstep);
+ if (vnauto)
+ addproperty ("levellistmode", hg, "radio", "{auto}|manual", "auto");
+ addproperty ("levelstepmode", hg, "radio", "{auto}|manual", "auto");
+ elseif (isscalar (vn))
+ addproperty ("levellistmode", hg, "radio", "{auto}|manual", "auto");
+ addproperty ("levelstepmode", hg, "radio", "{auto}|manual", "manual");
+ else
+ addproperty ("levellistmode", hg, "radio", "{auto}|manual", "manual");
+ addproperty ("levelstepmode", hg, "radio", "{auto}|manual", "auto");
+ endif
+
+ addproperty ("labelspacing", hg, "double", 144);
+ addproperty ("textlist", hg, "data", lev);
+ addproperty ("textlistmode", hg, "radio", "{auto}|manual", "auto");
+ addproperty ("textstep", hg, "double", lvlstep);
+ addproperty ("textstepmode", hg, "radio", "{auto}|manual", "auto");
+ addproperty ("showtext", hg, "radio", "on|{off}", "off");
+
+ addproperty ("linecolor", hg, "color", linespec.color, "{auto}|none");
+ addproperty ("linestyle", hg, "linelinestyle", linespec.linestyle);
+ addproperty ("linewidth", hg, "linelinewidth", 0.5);
+
+ ## FIXME It would be good to hide this property which is just an undocumented
+ ## alias for linecolor
+ addproperty ("edgecolor", hg, "color", edgecolor, "{flat}|none");
+
+ addlistener (hg, "fill", @update_data);
+
+ addlistener (hg, "zlevelmode", @update_zlevel);
+ addlistener (hg, "zlevel", @update_zlevel);
+
+ addlistener (hg, "levellist", @update_data);
+ addlistener (hg, "levelstep", @update_data);
+ addlistener (hg, "levellistmode", @update_data);
+ addlistener (hg, "levelstepmode", @update_data);
+
+ addlistener (hg, "labelspacing", @update_text);
+ addlistener (hg, "textlist", @update_text);
+ addlistener (hg, "textlistmode", @update_text);
+ addlistener (hg, "textstep", @update_text);
+ addlistener (hg, "textstepmode", @update_text);
+ addlistener (hg, "showtext", @update_text);
+
+ addlistener (hg, "linecolor", @update_line);
+ addlistener (hg, "linestyle", @update_line);
+ addlistener (hg, "linewidth", @update_line);
+
+ addlistener (hg, "edgecolor", @update_edgecolor);
+
+ add_patch_children (hg);
+
+ axis("tight");
+
+ if (!isempty (opts))
+ set (hg, opts{:});
+ endif
+endfunction
+
+function add_patch_children (hg)
+ c = get (hg, "contourmatrix");
+ lev = get (hg, "levellist");
+ fill = get (hg, "fill");
+ zlev = get (hg, "zlevel");
+ zmode = get (hg, "zlevelmode");
+ lc = get (hg, "linecolor");
+ lw = get (hg, "linewidth");
+ ls = get (hg, "linestyle");
+ filled = get (hg, "fill");
+ ca = gca ();
+
+ if (strcmpi (lc, "auto"))
+ lc = "flat";
+ endif
+
+ if (strcmpi (filled, "on"))
+
+ lvl_eps = get_lvl_eps (lev);
+
+ ## Decode contourc output format.
+ i1 = 1;
+ ncont = 0;
+ while (i1 < columns (c))
+ ncont++;
+ cont_lev(ncont) = c(1, i1);
+ cont_len(ncont) = c(2, i1);
+ cont_idx(ncont) = i1+1;
+ ii = i1+1:i1+cont_len(ncont);
+ cont_area(ncont) = polyarea (c(1, ii), c(2, ii));
+ i1 += c(2, i1) + 1;
+ endwhile
+
+ ## Handle for each level the case where we have (a) hole(s) in a patch.
+ ## Those are to be filled with the color of level below or with the
+ ## background colour.
+ for k = 1:numel (lev)
+ lvl_idx = find (abs (cont_lev - lev(k)) < lvl_eps);
+ len = numel (lvl_idx);
+ if (len > 1)
+ ## mark = logical(zeros(size(lvl_idx)));
+ mark = false (size (lvl_idx));
+ a = 1;
+ while (a < len)
+ ## take 1st patch
+ b = a + 1;
+ pa_idx = lvl_idx(a);
+ ## get pointer to contour start, and contour length
+ curr_ct_idx = cont_idx(pa_idx);
+ curr_ct_len = cont_len(pa_idx);
+ ## get contour
+ curr_ct = c(:, curr_ct_idx:curr_ct_idx+curr_ct_len-1);
+ b_vec = (a+1):len;
+ next_ct_pt_vec = c(:, cont_idx(lvl_idx(b_vec)));
+ in = inpolygon (next_ct_pt_vec(1,:), next_ct_pt_vec(2,:),
+ curr_ct(1, :), curr_ct(2, :));
+ mark(b_vec(in)) = !mark(b_vec(in));
+ a++;
+ endwhile
+ if (numel (mark) > 0)
+ ## All marked contours describe a hole in a larger contour of
+ ## the same level and must be filled with colour of level below.
+ ma_idx = lvl_idx(mark);
+ if (k > 1)
+ ## Find color of level below.
+ tmp = find(abs(cont_lev - lev(k - 1)) < lvl_eps);
+ lvl_bel_idx = tmp(1);
+ ## Set color of patches found.
+ cont_lev(ma_idx) = cont_lev(lvl_bel_idx);
+ else
+ ## Set lowest level contour to NaN.
+ cont_lev(ma_idx) = NaN;
+ endif
+ endif
+ endif
+ endfor
+
+ ## The algorithm can create patches with the size of the plotting
+ ## area, we would like to draw only the patch with the highest level.
+ del_idx = [];
+ max_idx = find (cont_area == max (cont_area));
+ if (numel (max_idx) > 1)
+ ## delete double entries
+ del_idx = max_idx(1:end-1);
+ cont_area(del_idx) = cont_lev(del_idx) = [];
+ cont_len(del_idx) = cont_idx(del_idx) = [];
+ endif
+
+ ## Now we have everything together and can start plotting the patches
+ ## beginning with largest area.
+ [tmp, svec] = sort (cont_area);
+ len = ncont - numel (del_idx);
+ h = [];
+ for n = len:(-1):1
+ idx = svec(n);
+ ctmp = c(:, cont_idx(idx):cont_idx(idx) + cont_len(idx) - 1);
+ if (all (ctmp(:,1) == ctmp(:,end)))
+ ctmp(:, end) = [];
+ else
+ ## Special case unclosed contours
+ endif
+ if (isnan(cont_lev(idx)))
+ fc = get (ca, "color");
+ if (strcmp (fc, "none"))
+ fc = get (ancestor (ca, "figure"), "color");
+ endif
+ else
+ fc = "flat";
+ endif
+ h = [h; __go_patch__(ca, "xdata", ctmp(1, :)(:), "ydata", ctmp(2, :)(:),
+ "vertices", ctmp.', "faces", 1:(cont_len(idx)-1),
+ "facevertexcdata", cont_lev(idx),
+ "facecolor", fc, "cdata", cont_lev(idx),
+ "edgecolor", lc, "linestyle", ls,
+ "linewidth", lw, "parent", hg)];
+ endfor
+
+ if (min (lev) == max (lev))
+ set (ca, "clim", [min(lev)-1, max(lev)+1], "layer", "top");
+ else
+ set (ca, "clim", [min(lev), max(lev)], "layer", "top");
+ endif
+ else
+ ## Decode contourc output format.
+ i1 = 1;
+ h = [];
+ while (i1 < length (c))
+ clev = c(1,i1);
+ clen = c(2,i1);
+
+ if (all (c(:,i1+1) == c(:,i1+clen)))
+ p = c(:, i1+1:i1+clen-1).';
+ else
+ p = [c(:, i1+1:i1+clen), NaN(2, 1)].';
+ endif
+
+ switch (zmode)
+ case "none"
+ h = [h; __go_patch__(ca, "xdata", p(:,1), "ydata", p(:,2),
+ "zdata", [], "facecolor", "none",
+ "vertices", p, "faces", 1:rows(p),
+ "facevertexcdata", clev,
+ "edgecolor", lc, "linestyle", ls,
+ "linewidth", lw,
+ "cdata", clev, "parent", hg)];
+ case "auto"
+ h = [h; __go_patch__(ca, "xdata", p(:,1), "ydata", p(:,2),
+ "zdata", clev * ones(rows(p),1),
+ "vertices", [p, clev * ones(rows(p),1)],
+ "faces", 1:rows(p),
+ "facevertexcdata", clev,
+ "facecolor", "none", "edgecolor", lc,
+ "linestyle", ls, "linewidth", lw,
+ "cdata", clev, "parent", hg)];
+ otherwise
+ h = [h; __go_patch__(ca, "xdata", p(:,1), "ydata", p(:,2),
+ "zdata", zlev * ones (rows(p), 1),
+ "vertices", [p, zlev * ones(rows(p),1)],
+ "faces", 1:rows(p),
+ "facevertexcdata", clev,
+ "facecolor", "none", "edgecolor", lc,
+ "linestyle", ls, "linewidth", lw,
+ "cdata", clev, "parent", hg)];
+ endswitch
+ i1 += clen + 1;
+ endwhile
+ endif
+
+endfunction
+
+function update_zlevel (h, d)
+ z = get (h, "zlevel");
+ zmode = get (h, "zlevelmode");
+ kids = get (h, "children");
+
+ switch (zmode)
+ case "none"
+ set (kids, "zdata", []);
+ case "auto"
+ for i = 1 : length (kids)
+ set (kids(i), "zdata", get (kids (i), "cdata") .*
+ ones (size (get (kids (i), "xdata"))));
+ endfor
+ otherwise
+ for i = 1 : length (kids)
+ set (kids(i), "zdata", z .* ones (size (get (kids (i), "xdata"))));
+ endfor
+ endswitch
+endfunction
+
+function update_edgecolor (h, d)
+ ec = get (h, "edgecolor");
+ lc = get (h, "linecolor");
+ if (ischar (ec) && strcmpi (ec, "flat"))
+ if (! strcmpi (lc, "auto"))
+ set (h, "linecolor", "auto");
+ endif
+ elseif (! isequal (ec, lc))
+ set (h, "linecolor", ec);
+ endif
+endfunction
+
+function update_line (h, d)
+ lc = get (h, "linecolor");
+ ec = get (h, "edgecolor");
+ if (strcmpi (lc, "auto"))
+ lc = "flat";
+ endif
+ if (! isequal (ec, lc))
+ set (h, "edgecolor", lc);
+ endif
+ set (findobj (h, "type", "patch"), "edgecolor", lc,
+ "linewidth", get (h, "linewidth"), "linestyle", get (h, "linestyle"));
+endfunction
+
+function update_data (h, d)
+ persistent recursive = false;
+
+ if (!recursive)
+ recursive = true;
+
+ delete (get (h, "children"));
+
+ if (strcmpi (get (h, "levellistmode"), "manual"))
+ lvl = get (h, "levellist");
+ elseif (strcmpi (get (h, "levelstepmode"), "manual"))
+ z = get (h, "zdata");
+ lvl = ceil ((max(z(:)) - min (z(:)) ./ get (h, "levelstep")));
+ else
+ lvl = 10;
+ endif
+
+ if (strcmpi (get (h, "fill"), "on"))
+ X = get (h, "xdata");
+ Y = get (h, "ydata");
+ Z = get (h, "zdata");
+ if (isvector (X) || isvector (Y))
+ [X, Y] = meshgrid (X, Y);
+ endif
+ [nr, nc] = size (Z);
+ X0 = prepad(X, nc+1, 2 * X(1, 1) - X(1, 2), 2);
+ X0 = postpad(X0, nc+2, 2 * X(1, nc) - X(1, nc - 1), 2);
+ X0 = [X0(1, :); X0; X0(1, :)];
+ Y0 = prepad(Y, nr+1, 2 * Y(1, 1) - Y(2, 1), 1);
+ Y0 = postpad(Y0, nr+2, 2 * Y(nr, 1) - Y(nr - 1, 1));
+ Y0 = [Y0(:, 1), Y0, Y0(:, 1)];
+ Z0 = -Inf(nr+2, nc+2);
+ Z0(2:nr+1, 2:nc+1) = Z;
+ [c, lev] = contourc (X0, Y0, Z0, lvl);
+ else
+ [c, lev] = contourc (get (h, "xdata"), get (h, "ydata"),
+ get (h, "zdata"), lvl);
+ endif
+ set (h, "contourmatrix", c);
+
+ if (strcmpi (get (h, "levellistmode"), "manual"))
+ ## Do nothing
+ elseif (strcmpi (get (h, "levelstepmode"), "manual"))
+ set (h, "levellist", lev);
+ else
+ set (h, "levellist", lev);
+ z = get (h, "zdata");
+ lvlstep = (max(z(:)) - min(z(:))) / 10;
+ set (h, "levelstep", lvlstep);
+ endif
+
+ add_patch_children (h);
+ update_text (h, d);
+ endif
+
+ recursive = false;
+endfunction
+
+function update_text (h, d)
+ persistent recursive = false;
+
+ if (!recursive)
+ recursive = true;
+
+ delete (findobj (h, "type", "text"));
+
+ if (strcmpi (get (h, "textlistmode"), "manual"))
+ lvl = get (h, "textlist");
+ elseif (strcmpi (get (h, "textstepmode"), "manual"))
+ lev = get (h, "levellist");
+
+ lvl_eps = get_lvl_eps (lev);
+
+ stp = get (h, "textstep");
+ t = [0, floor(cumsum(diff (lev)) / (abs(stp) - lvl_eps))];
+ lvl = lev([true, t(1:end-1) != t(2:end)]);
+ set (h, "textlist", lvl);
+ else
+ lvl = get (h, "levellist");
+ set (h, "textlist", lvl, "textstep", get (h, "levelstep"));
+ endif
+
+ if (strcmpi (get (h, "showtext"), "on"))
+ switch (get (h, "zlevelmode"))
+ case "manual"
+ __clabel__ (get (h, "contourmatrix"), lvl, h,
+ get (h, "labelspacing"), get (h, "zlevel"));
+ case "auto"
+ __clabel__ (get (h, "contourmatrix"), lvl, h,
+ get (h, "labelspacing"), "auto");
+ otherwise
+ __clabel__ (get (h, "contourmatrix"), lvl, h,
+ get (h, "labelspacing"), []);
+ endswitch
+ endif
+
+ recursive = false;
+ endif
+endfunction
+
+function lvl_eps = get_lvl_eps (lev)
+ ## FIXME -- is this the right thing to do for this tolerance? Should
+ ## it be an absolute or relative tolerance, or switch from one to the
+ ## other depending on the value of lev?
+ if (isscalar (lev))
+ lvl_eps = abs (lev) * sqrt (eps) + sqrt (eps);
+ else
+ tmp = min (abs (diff (lev)));
+ if (tmp < 10*eps)
+ lvl_eps = sqrt (eps);
+ else
+ lvl_eps = tmp / 1000.0;
+ endif
+ endif
+endfunction
git://git.creatis.insa-lyon.fr / CreaPhase.git / blobdiff