Initialize to Increase Efficiency of plot3 Animation in Loop
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Laurel Castillo
on 18 Dec 2018
Commented: Laurel Castillo
on 18 Dec 2018
One line is stationary. The moving line is drawn with the psm_xp1V set (4*4*10). In each loop, a set of 4*4 matrix is used to update the values of the line.
Here is my main. Basically I just load the data and put the animiation function in the loop.
psm_xp1V_data = load ('psm_xp1V.mat', 'psm_xp1V');
for i=1:10
psm_xp1V=psm_xp1V_data.psm_xp1V(:,:,i);
[frame_plot] = animation3(psm_xp1V);
end
The animatioin function. The Base line is constant. And the Tip line updates in each loop, according to the dataset.
function [frame_plot]=animation3(psm_xp1V)
figure(3); % BTW I added these two lines here to make the figure as an output of the function. Do I really have to do so?
frame_plot = figure(3); %
axis([-0.5 0.5 -0.5 0.5 -0.5 0.5]);
grid on;
view(3);
s=0.1;
cla;
%Base
Base = eye(4);
BaseO = Base(1:3,4);
BaseX = Base(1:3,1).*s;
plot3([BaseO(1) BaseX(1)+BaseO(1)], [BaseO(2) BaseX(2)+BaseO(2)], [BaseO(3) BaseX(3)+BaseO(3)], ...
'color', 'r', 'linewidth', 3);
hold on % And do I really need hold on?
%Tip
tip_x = psm_xp1V; %input
TipO = tip_x(1:3,4);
TipX = tip_x(1:3,1).*s;
plot3([TipO(1) TipX(1)+TipO(1)], [TipO(2) TipX(2)+TipO(2)], [TipO(3) TipX(3)+TipO(3)], ...
'color', 'r', 'linewidth', 3);
hold on
drawnow;
end
Can I increase the efficiency by adding another function to initialize the figure before the loop?
So we don't have to create and update the whole figure in each loop. Maybe just update the values for the moving line Tip in each loop.
Please advise.
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Accepted Answer
Steven Lord
on 18 Dec 2018
Don't call plot3 over and over, which will keep increasing the number of graphics objects present in the figure. Instead either use the animatedline function or use one of the techniques described in the "Animation Techniques" section on this documentation page.
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