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// Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
// Copyright (C) 2011 - INRIA - Serge Steer <serge.steer@inria.fr>
//
// This file must be used under the terms of the CeCILL.
// This source file is licensed as described in the file COPYING, which
// you should have received as part of this distribution. The terms
// are also available at;
// http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
function comet3d(varargin)
//Comet-like trajectory.
// comet(y) displays an animated comet plot of the vector y.
// comet(x,y) displays an animated comet plot of vector y vs. x.
// comet(x,y,p) uses a comet of length p*size(y,'*'). Default is p = 0.1.
// Example:
// t = linspace(-%pi,%pi,500);
// clf();comet3d(sin(5*t),sin(t),t^2)
//
// function z=traj(x,y),z=1.5*sin(x^2)*cos(y),endfunction
// clf();comet3d(cos(t),sin(t),traj)
//
nv=size(varargin)
if nv>=3&varargin(nv-1)=="colors" then
c=round(varargin(nv))
if type(c)<>1|~isreal(c) then
error(msprintf(_("%s: Wrong type for argument #%d: Real vector expected.\n"),"comet3d",nv))
end
varargin=list(varargin(1:$-2))
else
c=[]
end
select size(varargin)
case 1 then //z
z=varargin(1)
if or(size(z)==1) then
x=1:size(z,"*")
else
x=1:size(z,1)
end
y=x
p=0.1
case 3 then //x,y,z
[x,y,z]=varargin(1:3)
p=0.1
case 4 then //x,y,z,p
[x,y,z,p]=varargin(1:4)
else
error(msprintf(_("%s: Wrong number of input arguments: %d or %d to %d expected.\n"),"comet3d",1,3,4))
end
if type(x)<>1|~isreal(x) then
error(msprintf(_("%s: Wrong type for argument #%d: Real vector expected.\n"),"comet3d",1))
end
if type(y)<>1|~isreal(x) then
error(msprintf(_("%s: Wrong type for argument #%d: Real vector expected.\n"),"comet3d",1))
end
if (type(z)<>1|~isreal(z))&and(type(z)<>[11 13]) then
error(msprintf(_("%s: Wrong type for argument #%d: Real vector expected.\n"),"comet3d",3))
end
if or(type(z)==[11 13]) then
x=x(:);y=y(:)
n=size(x,"*")
m=1
if n<>size(y,"*") then
error(msprintf(_("%s: Incompatible input arguments #%d and #%d: Same sizes expected.\n"),"comet3d",1,2))
end
prot=funcprot();funcprot(0)
zz=z;
z=zeros(n,1);
for i=1:n
z(i)=zz(x(i),y(i))
end
funcprot(prot)
else
if or(size(z)==1) then
m=1
z=z(:)
n=size(z,"*")
else
[n,m]=size(z)
end
if or(size(x)==1) then
x=x(:)
if size(x,"*")<>n then
error(msprintf(_("%s: Wrong size for argument #%d: %d expected.\n"),"comet3d",1,n))
end
x=x*ones(1,m)
else
if or(size(x)<>size(z)) then
error(msprintf(_("%s: Incompatible input arguments #%d and #%d: Same sizes expected.\n"),"comet3d",1,3))
end
end
if or(size(y)==1) then
y=y(:)
if size(y,"*")<>n then
error(msprintf(_("%s: Wrong size for argument #%d: %d expected.\n"),"comet3d",2,n))
end
y=y*ones(1,m)
else
if or(size(y)<>size(z)) then
error(msprintf(_("%s: Incompatible input arguments #%d and #%d: Same sizes expected.\n"),"comet3d",2,3))
end
end
end
if type(p)<>1|~isreal(p)|size(p,"*")>1 then
error(msprintf(_("%s: Wrong type for argument #%d: Real scalar expected.\n"),"comet3d",3))
end
if p<0|p>=1 then
error(msprintf(_("%s: Wrong value for input argument #%d: Must be in the interval %s.\n"),"comet3d",3,"[0 1["))
end
fig=gcf();
if c==[] then
c=1:m
else
if size(c,"*")<>m then
error(msprintf(_("%s: Wrong size for argument #%d: %d expected.\n"),"comet",nv,m))
end
if min(c)<1|max(c)>size(fig.color_map,1) then
error(msprintf(_( "%s: Wrong value for input argument #%d: Must be in the set {%s}.\n"),"comet",nv,"1,...,"+string(size(fig.color_map,1))))
end
end
axes=gca();
axes.view="3d"
if axes.children==[] then
axes.data_bounds=[min(x) min(y) min(z);max(x) max(y) max(z)];
axes.axes_visible="on";
axes.box="on";
else
axes.data_bounds=[min(axes.data_bounds(1,:), [min(x) min(y) min(z)]);
max(axes.data_bounds(2,:), [max(x) max(y) max(z)])];
end
//create the head, body and tail polylines
drawlater()
for l=1:m
xpoly([],[]);tail(l)=gce();
tail(l).foreground=c(l);
xpoly([],[]);body(l)=gce();
body(l).foreground=c(l); body(l).thickness=2;
xpoly([],[],"marks");head(l)=gce();
head(l).mark_size_unit="point";
head(l).mark_size=6;
head(l).mark_style=9;
head(l).mark_foreground=c(l);
end
show_window();
function anim()
//animation loop
k = round(p*n);
step=ceil(n/200); //used to speed up the drawing
for i=1:n
for l=1:m
head(l).data=[x(i,l),y(i,l),z(i,l)];
if i<=k then
body(l).data= [body(l).data;[x(i,l),y(i,l),z(i,l)]];
else
body(l).data= [body(l).data(2:$,:);[x(i,l),y(i,l),z(i,l)]];
tail(l).data=[ tail(l).data;[x(i-k,l),y(i-k,l),z(i-k,l)]];
end
end
if modulo(i,step)==0 then
fig.immediate_drawing = "on"
fig.immediate_drawing = "off"
end
end
drawnow(),drawlater()
for i=n:n+k
for l=1:m
body(l).data= body(l).data(2:$,:);
tail(l).data=[ tail(l).data;[x(i-k,l),y(i-k,l),z(i-k,l)]];
end
if modulo(i,step)==0 then
fig.immediate_drawing = "on"
fig.immediate_drawing = "off"
end
end
delete(body)
drawnow()
endfunction
//not to generate an error message if the window is closed
exec(anim, "errcatch", -1)
//exec(anim,-1)
endfunction
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