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91 lines
2.3 KiB
91 lines
2.3 KiB
function hh = quadmesh(quad,x,y,z,varargin)
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%QUADMESH Quadrilateral mesh plot.
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% QUADMESH(QUAD,X,Y,Z,C) displays the quadrilaterals defined in the M-by-4
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% face matrix QUAD as a mesh. A row of QUAD contains indexes into
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% the X,Y, and Z vertex vectors to define a single quadrilateral face.
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% The edge color is defined by the vector C.
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%
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% QUADMESH(QUAD,X,Y,Z) uses C = Z, so color is proportional to surface
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% height.
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%
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% QUADMESH(TRI,X,Y) displays the quadrilaterals in a 2-d plot.
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%
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% H = QUADMESH(...) returns a handle to the displayed quadrilaterals.
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%
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% QUADMESH(...,'param','value','param','value'...) allows additional
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% patch param/value pairs to be used when creating the patch object.
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%
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% See also PATCH.
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%
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% Script code based on copyrighted code from mathworks for TRIMESH.
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% Allan P. Engsig-Karup, apek@mek.dtu.dk.
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ax = axescheck(varargin{:});
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ax = newplot(ax);
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if nargin == 3 || (nargin > 4 && ischar(z))
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d = tri(:,[1 2 3 4 1])';
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if nargin == 3
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h = plot(ax, x(d), y(d));
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else
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h = plot(ax, x(d), y(d),z,varargin{1},varargin{2:end});
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end
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if nargout == 1, hh = h; end
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return;
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end
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start = 1;
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if nargin>4 && rem(nargin-4,2)==1
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c = varargin{1};
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start = 2;
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elseif nargin<3
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error(id('NotEnoughInputs'),'Not enough input arguments');
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else
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c = z;
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end
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if ischar(get(ax,'color')),
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fc = get(gcf,'Color');
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else
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fc = get(ax,'color');
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end
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h = patch('faces',quad,'vertices',[x(:) y(:) z(:)],'facevertexcdata',c(:),...
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'facecolor',fc,'edgecolor',get(ax,'defaultsurfacefacecolor'),...
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'facelighting', 'none', 'edgelighting', 'flat',...
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'parent',ax,...
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varargin{start:end});
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if ~ishold(ax), view(ax,3), grid(ax,'on'), end
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if nargout == 1, hh = h; end
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function str = id(str)
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str = ['MATLAB:quadmesh:' str];
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return
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% % Example: plot quadmesh
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% close all, clear all, clc
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%
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% x = [0 1 2 2 1 1 0 0];
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% y = [0 0 0 1 1 2 2 1];
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% for i = 1 : length(x)
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% text(x(i)+0.1,y(i)+0.1,sprintf('%d',i))
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% hold on
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% end
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% quad = [1 2 5 8;
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% 2 3 4 5;
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% 8 5 6 7];
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%
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% plot(x,y,'k.-')
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% axis off
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%
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% z = sin(pi*x).*cos(pi*y);
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% c = z;
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% figure
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%
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% ax=newplot;
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% fc = get(gcf,'Color');
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% h = patch('faces',quad,'vertices',[x(:) y(:) z(:)],'facevertexcdata',c(:),...
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% 'facecolor',fc,'edgecolor',get(ax,'defaultsurfacefacecolor'),...
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% 'facelighting', 'none', 'edgelighting', 'flat',...
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% 'parent',ax);
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