my_comet_xyz.m

一个小小的c语言编程

function my_comet_xyz(x,y,z,t,p,time,htext_xyz_t,htext_xyz_x,htext_xyz_y,htext_xyz_z)           %与轨线运动同步显示坐标
global b r
if nargin == 0, error('Not enough input arguments.'); end
if nargin < 3, z = x; x = 1:length(z); y = 1:length(z); end
if nargin < 4, p = 0.10; end

singularity1_x=0;singularity1_y=0;singularity1_z=0;
singularity2_x=(b*(r-1))^(1/2);singularity2_y=(b*(r-1))^(1/2);singularity2_z=r-1;
singularity3_x=-(b*(r-1))^(1/2);singularity3_y=-(b*(r-1))^(1/2);singularity3_z=r-1;
plot3(x,y,z,'W'),hold on

if r<=1
    plot3(singularity1_x,singularity1_y,singularity1_z,'k.','MarkerSize',20)       %画奇点
    text(singularity1_x,singularity1_y,singularity1_z,' O')
      else 
   plot3(singularity1_x,singularity1_y,singularity1_z,'k.','MarkerSize',20)       %画奇点
   text(singularity1_x,singularity1_y,singularity1_z,' O')
   plot3(singularity2_x,singularity2_y,singularity2_z,'k.','MarkerSize',20)       %画奇点
   text(singularity2_x,singularity2_y,singularity2_z,' C+')
   plot3(singularity3_x,singularity3_y,singularity3_z,'k.','MarkerSize',20)       %画奇点
   text(singularity3_x,singularity3_y,singularity3_z,' C-')
end
hold on
title('Lorenz phase'),xlabel('x'),ylabel('y'),zlabel('z'),

ax = newplot;
if ~ishold,
  axis([min(x(isfinite(x))) max(x(isfinite(x))) min(y(isfinite(y)))  ...
        max(y(isfinite(y))) min(z(isfinite(z))) max(z(isfinite(z)))])
end

co = get(ax,'colororder');

if size(co,1)>=3,
  % Choose first three colors for head, body, and tail
  head = line('color',co(1,:),'marker','o','erase','xor', ...
              'xdata',x(1),'ydata',y(1),'zdata',z(1));
  body = line('color',co(2,:),'linestyle','-','erase','none', ...
              'xdata',[],'ydata',[],'zdata',[]);
  tail = line('color',co(3,:),'linestyle','-','erase','none', ...
              'xdata',[],'ydata',[],'zdata',[]);
else
  % Choose first three colors for head, body, and tail
  head = line('color',co(1,:),'marker','o','erase','xor', ...
              'xdata',x(1),'ydata',y(1),'zdata',z(1));
  body = line('color',co(1,:),'linestyle','--','erase','none', ...
              'xdata',[],'ydata',[],'zdata',[]);
  tail = line('color',co(1,:),'linestyle','-','erase','none', ...
              'xdata',[],'ydata',[],'zdata',[]);
end

m = length(z);
k = round(p*m);
q=1;
% Grow the body
for i = 2:k+1
   j = i-1:i;
   set(head,'xdata',x(i),'ydata',y(i),'zdata',z(i))
   set(body,'xdata',x(j),'ydata',y(j),'zdata',z(j))
   pause(time),
   drawnow
   set(htext_xyz_t,'string',['t= ',sprintf('%2.8f\n',t(q))]);
  set(htext_xyz_x,'string',['x= ',sprintf('%2.8f\n',x(q))]);
  set(htext_xyz_y,'string',['y= ',sprintf('%2.8f\n',y(q))]);
  set(htext_xyz_z,'string',['z= ',sprintf('%2.8f\n',z(q))]); 
  q=q+1;
end

% Primary loop
m = length(x);
for i = k+2:m
   j = i-1:i;
   set(head,'xdata',x(i),'ydata',y(i),'zdata',z(i))
   set(body,'xdata',x(j),'ydata',y(j),'zdata',z(j))
   set(tail,'xdata',x(j-k),'ydata',y(j-k),'zdata',z(j-k))
   drawnow
   pause(time),
  set(htext_xyz_t,'string',['t= ',sprintf('%2.8f\n',t(q))]);
   set(htext_xyz_x,'string',['x= ',sprintf('%2.8f\n',x(q))]);
  set(htext_xyz_y,'string',['y= ',sprintf('%2.8f\n',y(q))]);
  set(htext_xyz_z,'string',['z= ',sprintf('%2.8f\n',z(q))]); 
  q=q+1;
end

% Clean up the tail
for i = m+1:m+k
   j = i-1:i;
   set(tail,'xdata',x(j-k),'ydata',y(j-k),'zdata',z(j-k))
   drawnow
end