mycomet3.m

一个小小的c语言编程

function mycomet3(x,y,z,p,time)

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

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);

% 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
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),
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