drawnow's low speed

Question

Mehdi 2018-3-9

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/387394-drawnow-s-low-speed

评论： Mehdi 2018-5-26

Hello, I have written a code which animates the motion of a ball. Here is the code:

n  = 100;
axes('XLim', [-10 10], 'YLim', [-10 10], 'ZLim', [-10 n]);
grid on
daspect([1, 1, 1])
axf = gca;            
axf.Clipping = 'off'; 
material shiny
view(135, 10)
set(gcf, 'Renderer', 'opengl')
camlight right
lighting gouraud
xlabel('x')
ylabel('y')
zlabel('z')
[xsph, ysph, zsph] = sphere(500);
h = surface(10*xsph, 10*ysph, 10*zsph, 'FaceColor', 'r', 'EdgeColor', 'none');
w = hgtransform;
set(h, 'parent', w)
zp = 1:n;
yp = zeros(numel(zp));
xp = zeros(numel(zp));
ip = 1;
while ip < n
    transr = makehgtform('translate', [xp(ip)   yp(ip)   zp(ip)]);
    set(w, 'Matrix', transr);
    ip = ip + 1;
    drawnow
end

However the drawnow function slows down the speed of animation drastically. I read other related threads but those suggestions seem not to be applicable to this code, as I'm using surface and not updating any image or video. I wonder if anyone could help me speed up the code a little bit. Thanks a lot.