Matlab - Initialize a script in every two seconds - matlab

Question

I tried to write an animation code in Matlab that repeats itself in every two seconds. The core animation scheme is as below:
Please take care the gif is repeating the core animation, originally there is only one cycle.
Here is the code:
% Figure settings
h= figure(2);
set(h, 'Position', [100 50 1200 750])
set(h,'Toolbar','None','Menubar','None')
set(h,'Name','Animation')
set(gcf,'doublebuffer','off');
set(gca, 'xlimmode','manual','ylimmode','manual','zlimmode','manual',...
'climmode','manual','alimmode','manual');
xlim([-200 1350])
ylim([-250 800])
set(gca,'xtick',[],'ytick', [], 'Position', [0 0 1 1]);
%Parameters
diameter = 60; %spot çapı
RamanX = 350; %ölçüm noktssı x konumu
nOfSpots = 4; %spot sayısı
spotCount = 0; %toplam spot sayısı
initPos = [50 150;50 300; 50 450; 50 600]; %konum 1
posII = [350 150;350 300; 350 450; 350 600]; %konum 2
Choice = rand(1,4)<.5; %Ölçüm sonunda verilen karar
deltaY2 = 100; % spotlar arası mesafe
x11 = zeros(nOfSpots,2);
x22 = zeros(nOfSpots,2);
x22a = zeros(nOfSpots,2);
x22b = zeros(nOfSpots,2);
for i=1:nOfSpots
x11(i,:) = [RamanX 150*(i-1)];
x22(i,:) = [800 50+deltaY2*(i-1)];
end
for i=1:nOfSpots/2
x22a(2*i-1,:) = [1280 -270+250*(i-1)];
x22a(2*i,:) = [1075 -270+250*(i-1)];
x22b(2*i-1,:) = [1280 220+250*(i-1)];
x22b(2*i,:) = [1075 220+250*(i-1)];
end
%Add 4 Circles to initial position
for i=1:nOfSpots
% Drag & Drop elipsler yerleştiriliyor
spot(i) = imellipse(gca, [initPos(i,1),initPos(i,2),diameter,diameter]);
spotCount = spotCount+1;
%elips özellikleri
setFixedAspectRatioMode(spot(spotCount), 'TRUE');
setResizable(spot(spotCount),0);
posSpot(spotCount,:) = getPosition(spot(i));
end
%Move Circles to posII
r = sqrt(sum(bsxfun(#minus,posII(:,1),initPos(:,1)).^2,2));
v = 30;
stepsize = ceil(r/v);
xstep = (posII(:,1)-initPos(:,1))/stepsize;
for i=1:stepsize
for j=1:nOfSpots
setPosition(spot(j), [initPos(j,1)+xstep(j)*i, initPos(j,2), diameter, diameter] )
posSpot(spotCount,:) = getPosition(spot(j));
end
pause(0.15)
end
%Move Circles to posIII
velocity = 30;
r2a = sqrt(sum(bsxfun(#minus,x22a,x11).^2,2));
stepsize2a = max(ceil(r2a/velocity));
r2b = sqrt(sum(bsxfun(#minus,x22a,x11).^2,2));
stepsize2b = max(ceil(r2b/velocity));
% Eğer öllçüm seçimi 1 ise taşı
for i=1:nOfSpots
if(Choice(i))
xstep2(i) = (x22a(i,1)-x11(i,1))./stepsize2a;
ystep2(i) = (x22a(i,2)-x11(i,2))./stepsize2a;
else
xstep2(i) = (x22b(i,1)-x11(i,1))./stepsize2b;
ystep2(i) = (x22b(i,2)-x11(i,2))./stepsize2b;
end
end
stepsize2 = max([stepsize2a stepsize2b]);
% Eğer ölçüm seçimi 0 ise taşı
for i=1:stepsize2
for j=1:nOfSpots
if(Choice(j))
setPosition(spot(j), [posII(j,1)+xstep2(j)*i, posII(j,2)+ystep2(j)*i, diameter, diameter] )
posSpot(spotCount,:) = getPosition(spot(j));
end
end
pause(0.15)
end
for i=1:stepsize2
for j=1:nOfSpots
if(~Choice(j))
setPosition(spot(j), [posII(j,1)+xstep2(j)*i, posII(j,2)+ystep2(j)*i, diameter, diameter] )
posSpot(spotCount,:) = getPosition(spot(j));
end
end
pause(0.15)
end
if(spotCount > 0)
for i=1:4
delete(spot(i))
end
end
The code doing this is a script not a function, say "animation.m". Now I am trying repeat this code in every 2 seconds. I tried to use loops with tic - toc commands, but the loop does not go to other cycle before finishing "animation.m". I need to get it work in the background.
One of my friend suggested me to use trigger. But, honestly, I could not apply the trigger command for my code even when I functionalized it.
Any help?
Edit:
The graphical flow chart of the problem is below:

Answer 1

I created an example that shows how it could be done.
Modifying your code, to draw just "one animated step" was too much work.
I decided to used your code to create all frames from advance (for example purpose).
I guess you are going to realize, that implementing background animation in Matlab is more difficult than you thought (unless I missed some hidden Matlab feature).
Matlab has very limited threading support, so I used a periodic timer.
My code sample does the following:
Build animation - create a cell array of all animated images.
You should avoid it, because it takes to much time (and memory).
I used it instead of modifying your code to draw one animated image.
Setup a periodic timer object with 0.2 seconds period (0.2 as an example).
I added a loop that illustrates the foreground processing (calculating sin(x) as an example).
Notice: I added small pause in the "foreground processing" loop.
The timer invokes a callback function every 0.2 seconds.
In the callback function the next animated frame is shown.
The timer is used for simulating a background execution.
You should replace the imshow, with your "animation step" function, that draws the frame (instead of showing a frame created from advance).
Here is the code sample (with your modified code included):
function TimerAnimation()
%Build set of images for animation.
[h_figure, Frames] = BuildAnimation();
t = timer;
t.TimerFcn = #timerFcn_Callback; %Set timer callback function
t.ExecutionMode = 'fixedRate'; %Set mode to "singleShot" - execute TimerFcn only once.
t.StartDelay = 0.1; %Wait 0.1 second from start(t) to executing timerFcn_Callback.
t.Period = 0.2; %Set period to 0.2 seconds.
%Turn on figure visibility
set(h_figure, 'Visible', 'on');
frame_counter = 1;
start(t) %Start timer;
%Do some other job...
%The animation is executed in the background (kind of in the background).
for x = 1:20000
y = sin(x/10000); %Calculate somthing...
if (mod(x, 100) == 0)
disp(['sin(', num2str(x/10000), ') = ', num2str(y)]); %Display somthing...
end
if (~isvalid(h_figure))
%Break loop if user closed the animation figure.
break;
end
%Must insert pause to "tight loop", allowing animation to run.
pause(0.01);
end
stop(t) %Stop timer;
delete(t); %Delete timer object.
if (~isvalid(h_figure))
close(h_figure);
end
%Timer function is executed every period of 0.2 seconds.
function timerFcn_Callback(mTimer, ~)
%Increse animation frame counter.
%figure(h_figure); %Set fo h_figure to be active figure.
h_axes = get(h_figure, 'CurrentAxes'); %Get axes of h_figure
imshow(Frames{frame_counter}, 'Parent', h_axes); %Display frame number frame_counter.
drawnow; %Force refresh.
frame_counter = mod(frame_counter, length(Frames)) + 1; %Advance to next frame (cyclically).
end
end
function [h, Frames] = BuildAnimation()
%Build set of images for animation.
%h - return handle to figure
%Frames - return cell array of animation images.
counter = 1;
% Figure settings
%h = figure(2);
%Create invisible figure.
h = figure('Visible', 'off');
set(h, 'Position', [100 50 1200 750])
set(h,'Toolbar','None','Menubar','None')
set(h,'Name','Animation')
set(gcf,'doublebuffer','off');
set(gca, 'xlimmode','manual','ylimmode','manual','zlimmode','manual',...
'climmode','manual','alimmode','manual');
xlim([-200 1350])
ylim([-250 800])
set(gca,'xtick',[],'ytick', [], 'Position', [0 0 1 1]);
%Parameters
diameter = 60; %spot ?ap?
RamanX = 350; %?l??m noktss? x konumu
nOfSpots = 4; %spot say?s?
spotCount = 0; %toplam spot say?s?
initPos = [50 150;50 300; 50 450; 50 600]; %konum 1
posII = [350 150;350 300; 350 450; 350 600]; %konum 2
Choice = rand(1,4)<.5; %?l??m sonunda verilen karar
deltaY2 = 100; % spotlar aras? mesafe
x11 = zeros(nOfSpots,2);
x22 = zeros(nOfSpots,2);
x22a = zeros(nOfSpots,2);
x22b = zeros(nOfSpots,2);
for i=1:nOfSpots
x11(i,:) = [RamanX 150*(i-1)];
x22(i,:) = [800 50+deltaY2*(i-1)];
end
for i=1:nOfSpots/2
x22a(2*i-1,:) = [1280 -270+250*(i-1)];
x22a(2*i,:) = [1075 -270+250*(i-1)];
x22b(2*i-1,:) = [1280 220+250*(i-1)];
x22b(2*i,:) = [1075 220+250*(i-1)];
end
%Add 4 Circles to initial position
for i=1:nOfSpots
% Drag & Drop elipsler yerle?tiriliyor
spot(i) = imellipse(gca, [initPos(i,1),initPos(i,2),diameter,diameter]);
spotCount = spotCount+1;
%elips ?zellikleri
setFixedAspectRatioMode(spot(spotCount), 'TRUE');
setResizable(spot(spotCount),0);
posSpot(spotCount,:) = getPosition(spot(i));
end
%Move Circles to posII
r = sqrt(sum(bsxfun(#minus,posII(:,1),initPos(:,1)).^2,2));
v = 30;
stepsize = ceil(r/v);
xstep = (posII(:,1)-initPos(:,1))/stepsize;
for i=1:stepsize
for j=1:nOfSpots
setPosition(spot(j), [initPos(j,1)+xstep(j)*i, initPos(j,2), diameter, diameter] )
posSpot(spotCount,:) = getPosition(spot(j));
end
%pause(0.15)
%Get frame, convert frame to image, and store image in Frames
Frames{counter} = frame2im(getframe(h));counter = counter + 1;
end
%Move Circles to posIII
velocity = 30;
r2a = sqrt(sum(bsxfun(#minus,x22a,x11).^2,2));
stepsize2a = max(ceil(r2a/velocity));
r2b = sqrt(sum(bsxfun(#minus,x22a,x11).^2,2));
stepsize2b = max(ceil(r2b/velocity));
% E?er ?ll??m se?imi 1 ise ta??
for i=1:nOfSpots
if(Choice(i))
xstep2(i) = (x22a(i,1)-x11(i,1))./stepsize2a;
ystep2(i) = (x22a(i,2)-x11(i,2))./stepsize2a;
else
xstep2(i) = (x22b(i,1)-x11(i,1))./stepsize2b;
ystep2(i) = (x22b(i,2)-x11(i,2))./stepsize2b;
end
end
stepsize2 = max([stepsize2a stepsize2b]);
% E?er ?l??m se?imi 0 ise ta??
for i=1:stepsize2
for j=1:nOfSpots
if(Choice(j))
setPosition(spot(j), [posII(j,1)+xstep2(j)*i, posII(j,2)+ystep2(j)*i, diameter, diameter] )
posSpot(spotCount,:) = getPosition(spot(j));
end
end
% pause(0.15)
%Get frame, convert frame to image, and store image in Frames
Frames{counter} = frame2im(getframe(h));counter = counter + 1;
end
for i=1:stepsize2
for j=1:nOfSpots
if(~Choice(j))
setPosition(spot(j), [posII(j,1)+xstep2(j)*i, posII(j,2)+ystep2(j)*i, diameter, diameter] )
posSpot(spotCount,:) = getPosition(spot(j));
end
end
% pause(0.15)
%Get frame, convert frame to image, and store image in Frames
Frames{counter} = frame2im(getframe(h));counter = counter + 1;
end
if(spotCount > 0)
for i=1:4
delete(spot(i))
end
end
imshow(Frames{1})
end
Example for what I meant by "drawing just one animated step":
function TimerAnimation2()
%Initiazlie animation.
param = InitAnimation();
%Same code as in previous example.
t = timer;t.TimerFcn = #timerFcn_Callback;t.ExecutionMode = 'fixedRate';t.StartDelay = 0.1;t.Period = 0.2;start(t)
for x = 1:20000;if (~isvalid(param.h)), break;end;pause(0.01);end
stop(t);delete(t);if (isvalid(param.h)), close(param.h);end
%Timer function is executed every period of 0.2 seconds.
function timerFcn_Callback(mTimer, ~)
%Animation single step
param = StepAnimation(param);
end
end
function param = InitAnimation()
h = figure;
set(h, 'Position', [100 50 1200 750]);set(h,'Toolbar','None','Menubar','None');set(h,'Name','Animation');set(gcf,'doublebuffer','off');
set(gca, 'xlimmode','manual','ylimmode','manual','zlimmode','manual', 'climmode','manual','alimmode','manual');
xlim([-200 1350]);ylim([-250 800]);set(gca,'xtick',[],'ytick', [], 'Position', [0 0 1 1]);
%Initialize param struct (param struct keeps animation parameters).
param.h = h;
param.x = 10;
param.y = 10;
%Draw rectangle in position x, y
h_axes = get(param.h, 'CurrentAxes');
rectangle('Position', [param.x param.y 20 20], 'Parent', h_axes);
end
%Example fo single animation step
%Get exsiting animation param as input, and retuen updated param as output.
function param = StepAnimation(param)
h_axes = get(param.h, 'CurrentAxes');
%Update param (to be used in next StepAnimation).
param.x = param.x + 10;
param.y = param.y + 10;
if (param.x > 500), param.x = 10;end
if (param.y > 500), param.y = 10;end
%Draw rectangle in position x, y
rectangle('Position', [param.x param.y 20 20], 'Parent', h_axes)
drawnow; %Force refresh.
end