plot3 Not Animating with the Loop (Drawnow is already added)

Question

Laurel Castillo 2018-12-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/435421-plot3-not-animating-with-the-loop-drawnow-is-already-added

评论： Laurel Castillo 2018-12-20

The 3D line is drawn with the mtm_x matrix set (3*2*100). In each loop, a set of 3*2 matrix is used to update the values of the line.

I checked that the values of Tip0 and TipX are updating. But the line stays in the initial position. (I've varied the loop no., but the line just stays there......)

Any suggestion?

mtm_x = mtm_x(:,:,1:100); % mtm_x is imported and become a 3*2*100 double
nt = length(mtm_x); % nt = 100
s=0.25;
figure(2);
grid on;
view(3);
for i = 1:nt
cla;
tip_x = mtm_x(:,:,i); % the 3D line is updated with i-th value set. e.g. for i=1, the first 3*2 matrix is used 
%tip
TipO = tip_x(1:3,2);
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
axis([-0.5 0.5 -0.5 0.5 -0.5 0.5]);
drawnow;
end

Thanks!

3 个评论
显示 1更早的评论隐藏 1更早的评论

Jan 2018-12-12

@Aqutris: :-) It will be hard to see a delay of a millisecond, when the monitor is updated with 60Hz. A longer pause would be useful.

Laurel Castillo 2018-12-20

Yeah, you're right! It's too fast to see! Thanks!

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Answer 1

Jan 2018-12-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/435421-plot3-not-animating-with-the-loop-drawnow-is-already-added#answer_352031

编辑：Jan 2018-12-12

在 MATLAB Online 中打开

mtm_x = rand(3,2,100); % mtm_x is imported and become a 3*2*100 double
nt    = size(mtm_x, 3); % do not rely on LENGTH
s     = 0.25;
Lim   = [0, 1];
axesH = axes('XLim', Lim, 'YLim', Lim, 'ZLim', Lim, ...
    'NextPlot', 'add');
grid on;
view(3);
for i = 1:nt
  tip_x = mtm_x(:,:,i);
  TipO  = tip_x(1:3,2);
  TipX  = tip_x(1:3,1) .* s; 
  plot3(axesH, ...
        [TipO(1) TipX(1)+TipO(1)], ...
        [TipO(2) TipX(2)+TipO(2)], ...
        [TipO(3) TipX(3)+TipO(3)], ...
        'color', 'r', 'linewidth', 3);
  drawnow;
end