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[ Last edited by shengjunjie on 2011-4-15 at 09:33 ]
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¡¾1¡¿ezimplot3 ´æ´¢¸ÃMÎļþ£¬²¢½«Îļþ·¾¶ÉèÖÃΪmatlabµ±Ç°Â·¾¶
function h = ezimplot3(fun,domain,n,color)
% EZIMPLOT3    Easy to use 3D implicit plotter.
%   EZIMPLOT3(FUN) plots the inline function FUN(X,Y,Z) = 0 over the
%   default domain -2*PI < X < 2*PI, -2*PI < Y < 2*PI, -2*PI < Z < 2*PI.
%
%   EZIMPLOT3(FUN,DOMAIN)plots FUN over the specified DOMAIN instead of the
%   default domain. DOMAIN can be the vector [XMIN,XMAX,YMIN,YMAX,ZMIN,ZMAX]
%   or the vector [A,B] (to plot over A < X < B, A < Y < B, A < Z < B).
%
%   EZIMPLOT3(...,N) plots FUN over the default domain using an N-by-N grid.
%   The default value for N is 60.
%
% Example
% Plot x^3+exp(y)-cosh(z)=4
%
% via a string: f='x^3+exp(y)-cosh(z)-4'
% ezimplot3(f)
%
% via a vectorized function handle: f = @(x,y,z) x.^3+exp(y)-cosh(z)-4
% ezimplot3(f)
%
% Note: this function do not use the ezgraph3 standard, like ezsurf, ezmesh
% ,etc, does. Because of that, ezimplot3 only tries to imitate that
% interface. A future work must be to modify the ezgraph3 to include a
% routine for implicit surfaces based on this file
%
%   Inspired by works of:   A.Jutan     UWO 02-02-98 ajutan@julian.uwo.ca
%   Made by:                G.Morales   UC  03-20-09 gmorales@uc.edu.ve
%
if nargin == 1
    domain = [-2*pi, 2*pi];             % default domain: -2*pi < xi < 2*pi
    n = 60;                             % default grid size
elseif nargin == 2
    n = 60;                             % just default grid
end
if  size(domain,2) == 2
    domain = repmat(domain,1,3);        %domain repeated in all variables
end
xm = linspace(domain(1), domain(2), n); % generating the volume data
ym = linspace(domain(3), domain(4), n);
zm = linspace(domain(5), domain(6), n);
[x,y,z] = meshgrid(xm, ym, zm);

if ischar(fun)
    fun = inline(vectorize(fun)); % making sure string "fun" is vectorized
    fvalues = feval(fun,x,y,z);         % evaluating "fun" in domain
elseif isa(fun,'function_handle')
    fvalues = fun(x,y,z);               % evaluating "fun" in domain
    fun = char(fun); fun = fun(9:end);  % pre-formatting of graph title
end
h = patch(isosurface(x,y,z, fvalues, 0)); %"patch" handles the structure
                                          %sent by "isosurface"
isonormals(x,y,z,fvalues,h) %Recalculating the isosurface normals based on
                            %the volume data
set(h,'FaceColor','red','EdgeColor','none');
xlabel('x');ylabel('y');zlabel('z');% naming the axis
alpha(0.8) % adjusting for some transparency
grid on
view(3)
axis equal
camlight
lighting gouraud
title([strrep(char(fun),'.','') ' = 0']); % graph title without "."
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shengjunjie

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Originally posted by ÑîСÅÖ at 2011-04-21 09:44:06:
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shengjunjie

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ÒýÓûØÌû:
Originally posted by ÑîСÅÖ at 2011-04-21 09:41:30:
¡¾1¡¿ezimplot3 ´æ´¢¸ÃMÎļþ£¬²¢½«Îļþ·¾¶ÉèÖÃΪmatlabµ±Ç°Â·¾¶
function h = ezimplot3(fun,domain,n,color)
% EZIMPLOT3    Easy to use 3D implicit plotter.
%   EZIMPLOT3(FUN) plots the inline functi ...

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shengjunjie

ľ³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
Originally posted by ÑîСÅÖ at 2011-04-21 12:37:10:
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http://muchong.com/html/201006/2180805.html

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