Mercurial > octave
view scripts/plot/draw/trisurf.m @ 22302:1c4cd12987f5
Use Octave syntax in graphics demos.
* inputdlg.m, listdlg.m, waitbar.m, autumn.m, bone.m, cool.m, copper.m,
cubehelix.m, flag.m, gray.m, hot.m, hsv.m, jet.m, lines.m, ocean.m, pink.m,
prism.m, rainbow.m, rgbplot.m, spring.m, summer.m, viridis.m, white.m,
winter.m, annotation.m, axis.m, clabel.m, daspect.m, datetick.m, grid.m,
legend.m, lighting.m, material.m, pbaspect.m, shading.m, text.m, xlim.m,
ylim.m, zlim.m, area.m, bar.m, barh.m, camlight.m, colorbar.m, comet.m,
comet3.m, contour.m, contour3.m, contourf.m, cylinder.m, ellipsoid.m,
errorbar.m, ezcontour.m, ezcontourf.m, ezmesh.m, ezmeshc.m, ezplot.m,
ezplot3.m, ezsurf.m, ezsurfc.m, feather.m, fill.m, fplot.m, isocaps.m,
isonormals.m, isosurface.m, light.m, line.m, loglog.m, loglogerr.m, mesh.m,
meshc.m, meshz.m, pareto.m, patch.m, pcolor.m, pie.m, pie3.m, plot.m, plot3.m,
plotmatrix.m, plotyy.m, polar.m, quiver.m, quiver3.m, rectangle.m, ribbon.m,
rose.m, scatter.m, scatter3.m, semilogx.m, semilogxerr.m, semilogy.m,
semilogyerr.m, shrinkfaces.m, slice.m, smooth3.m, sombrero.m, stairs.m, stem.m,
stem3.m, stemleaf.m, surf.m, surfc.m, surfl.m, surfnorm.m, tetramesh.m,
trimesh.m, triplot.m, trisurf.m, waterfall.m, copyobj.m, hold.m, linkaxes.m,
linkprop.m, printd.m, refreshdata.m, subplot.m, zoom.m, pcr.m, dump_demos.m:
Use Octave syntax in graphics demos.
author | Rik <rik@octave.org> |
---|---|
date | Mon, 15 Aug 2016 15:15:30 -0700 |
parents | 9babcd597676 |
children | 533c3c4059a3 |
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## Copyright (C) 2007-2015 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 {} {} trisurf (@var{tri}, @var{x}, @var{y}, @var{z}, @var{c}) ## @deftypefnx {} {} trisurf (@var{tri}, @var{x}, @var{y}, @var{z}) ## @deftypefnx {} {} trisurf (@dots{}, @var{prop}, @var{val}, @dots{}) ## @deftypefnx {} {@var{h} =} trisurf (@dots{}) ## Plot a 3-D triangular surface. ## ## In contrast to @code{surf}, which plots a surface mesh using rectangles, ## @code{trisurf} plots the mesh using triangles. ## ## @var{tri} is typically the output of a Delaunay triangulation over the ## grid of @var{x}, @var{y}. Every row of @var{tri} represents one triangle ## and contains three indices into [@var{x}, @var{y}] which are the ## vertices of the triangles in the x-y plane. @var{z} determines the ## height above the plane of each vertex. ## ## The color of the trimesh is computed by linearly scaling the @var{z} values ## to fit the range of the current colormap. Use @code{caxis} and/or ## change the colormap to control the appearance. ## ## Optionally, the color of the mesh can be specified independently of @var{z} ## by supplying a color matrix, @var{c}. If @var{z} has N elements, then ## @var{c} should be an Nx1 vector for colormap data or an Nx3 matrix for ## RGB data. ## ## Any property/value pairs are passed directly to the underlying patch object. ## ## The optional return value @var{h} is a graphics handle to the created patch ## object. ## @seealso{surf, triplot, trimesh, delaunay, patch, shading} ## @end deftypefn function h = trisurf (tri, x, y, z, varargin) if (nargin < 4) print_usage (); endif if (nargin > 4 && isnumeric (varargin{1})) c = varargin{1}; varargin(1) = []; if (isvector (c)) if (numel (c) != numel (z)) error ("trisurf: C must have 'numel (Z)' elements"); endif c = c(:); elseif (rows (c) != numel (z) || columns (c) != 3) error ("trisurf: TrueColor C matrix must be 'numel (Z)' rows by 3 columns"); endif else c = z(:); endif ## For Matlab compatibility: if (! any (strcmpi (varargin, "FaceColor"))) varargin(end+(1:2)) = {"FaceColor", "flat"}; endif hax = newplot (); htmp = patch ("Faces", tri, "Vertices", [x(:), y(:), z(:)], "FaceVertexCData", c, varargin{:}); if (! ishold ()) set (hax, "view", [-37.5, 30], "box", "off", "xgrid", "on", "ygrid", "on", "zgrid", "on"); endif if (nargout > 0) h = htmp; endif endfunction %!demo %! clf; %! colormap ('default'); %! N = 31; %! [x, y] = meshgrid (1:N); %! tri = delaunay (x(:), y(:)); %! z = peaks (N); %! h = trisurf (tri, x, y, z, 'facecolor', 'interp'); %! axis tight; %! zlim auto; %! title (sprintf ('facecolor = %s', get (h, 'facecolor'))); %!demo %! clf; %! colormap ('default'); %! N = 31; %! [x, y] = meshgrid (1:N); %! tri = delaunay (x(:), y(:)); %! z = peaks (N); %! h = trisurf (tri, x, y, z, 'facecolor', 'flat'); %! axis tight; %! zlim auto; %! title (sprintf ('facecolor = %s', get (h, 'facecolor'))); %!demo %! clf; %! colormap ('default'); %! old_state = rand ('state'); %! restore_state = onCleanup (@() rand ('state', old_state)); %! rand ('state', 10); %! N = 10; %! x = 3 - 6 * rand (N, N); %! y = 3 - 6 * rand (N, N); %! z = peaks (x, y); %! tri = delaunay (x(:), y(:)); %! trisurf (tri, x(:), y(:), z(:)); %!demo %! clf; %! colormap ('default'); %! x = rand (100, 1); %! y = rand (100, 1); %! z = x.^2 + y.^2; %! tri = delaunay (x, y); %! trisurf (tri, x, y, z); %!demo %! clf; %! colormap ('default'); %! x = rand (100, 1); %! y = rand (100, 1); %! z = x.^2 + y.^2; %! tri = delaunay (x, y); %! trisurf (tri, x, y, z, 'facecolor', 'interp'); %!demo %! clf; %! colormap ("default"); %! x = rand (100, 1); %! y = rand (100, 1); %! z = x.^2 + y.^2; %! tri = delaunay (x, y); %! trisurf (tri, x, y, z, "facecolor", "interp", "edgecolor", "k"); ## Test input validation %!error trisurf () %!error trisurf (1) %!error trisurf (1,2) %!error trisurf (1,2,3) %!error <C must have 'numel \(Z\)' elements> trisurf (1,2,3,4,[5 6]) %!error <C must have 'numel \(Z\)' elements> trisurf (1,2,3,4,[5 6]') %!error <TrueColor C matrix must> trisurf ([1;1],[2;2],[3;3],[4;4],zeros(3,3)) %!error <TrueColor C matrix must> trisurf ([1;1],[2;2],[3;3],[4;4],zeros(2,2))