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标题: 分享一个猴鞍面的代码 [打印本页]
作者: panphp    时间: 2020-5-28 10:31
标题: 分享一个猴鞍面的代码
分享一个猴鞍面的代码：( T6 z+ ^) X! v1 O1 t
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% monkey_saddle.m9 ]% V8 x0 l2 S/ Q! R' F7 ~
%
6 b3 {( I4 @# o7 u% Make an animation of a monkey saddle surface.
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% Name of animation created
! V8 n$ \4 g( ~4 Efilename = 'monkey_saddle.gif';
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% Polar coordinates
6 E; P' `# Z4 Lr = linspace(0, 1);
0 R& R! [8 u, ?6 v/ g. J2 Vt = linspace(-pi, pi);( F$ Y2 ]8 N5 E: Z( ^
[R, T] = meshgrid(r, t);# C$ D7 e5 e5 `' [/ f5 G! G2 D

: ^  v* `4 H7 i" p1 H6 s% Cartesian coordinates
. p! w& U- ]0 G) R& C! fx = R .* cos(T);, {4 r: n4 b( D# k9 P
y = R .* sin(T);
9 f, m) w& J# xz = x.^3 - 3 * x .* y.^2;
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% t! b+ _) M$ t8 k, c; m* q% Gaussian curvature to color the surface& b, k9 _6 W* |
K = - 36 * (x.^2 + y.^2)...  \. o# N2 T. L2 G: P1 ?( ~
  ./ (1 + 9 * (x.^2 + y.^2).^2).^2;
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% Plot the surface
; ~& S' Z8 k0 A/ KchartSurface = surf(x, y, z, K);
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% Edit its appearance
2 V0 j+ j8 _0 Z3 ochartSurface.EdgeColor    = 'none';. q1 }  _& G$ C
chartSurface.FaceColor    = 'interp';
+ ~7 c% ^  C" J: m' R1 P/ ^chartSurface.FaceLighting = 'gouraud';/ O  E+ ^( h' J+ C& G! R- h% N5 _

" A$ x* M! |0 J2 J  zax = gca;
9 `0 ?" m( q& ]- i' h6 ?8 r4 b5 |# ^% }$ ]
% Remove tick labels
! y( K8 J# }" p. m/ kax.XTickLabel = {};( X; F3 E% x2 d7 W
ax.YTickLabel = {};
/ L3 C4 |) q2 ~# }ax.ZTickLabel = {};8 G! }0 L) V9 [9 Z3 G. |

9 m' d" J# Y# U+ ?% Rotate the camera's azimuthal angle
( I& W3 Z& j* V( i( q& u( xaxis vis3d;
& q7 J3 Z" R# n7 T# Dv = ax.View;; r  ^& N1 z* O) {+ _# M. {& b* V9 s
az = v(1);) A5 g" T& q6 p, h# k
el = v(2);
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% Minimize file size by taking advantage of 3-fold symmetry of the surface$ Y' m- ]6 @, z6 T$ y
for k = 0:119; A2 Q: E0 B4 h/ P) e2 ~1 z
  ax.View = [k, el];: z6 Z7 v- v5 x$ j2 y; g6 y- }) e- _
  drawnow;* ^, V+ {$ m4 M1 `2 ^6 _  u
  frame = getframe(1);8 ~1 h: O6 b2 _# x' W) `( Q$ P- l
  im = frame2im(frame);
& u8 G6 V, D8 A$ m2 _* z) [  [A,map] = rgb2ind(im,256);
( ?9 h" H. Y5 y0 G2 {. H  if k == 0;
& w6 P4 Z; ~. D    imwrite(A,map,filename,'gif','LoopCount',Inf,'DelayTime',0);1 l5 h& ?9 L  A( S# ~7 w% Y6 M% Z  M, v
  else
. c! i3 ^% d' k  S" T/ f, X    imwrite(A,map,filename,'gif','WriteMode','append','DelayTime',0);
' D3 A  M+ ]9 t) v2 ^, `' [7 I  end
& m; R6 H  s. x: \  l3 mend
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作者: duoer    时间: 2020-5-28 11:27
看看楼主的代码。



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