'Exceeded the maximum number (8) of light sources' When trying to plot two shrinking spheres on the same figure

Question

Max Beaumont 2019-7-12

1
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/471429-exceeded-the-maximum-number-8-of-light-sources-when-trying-to-plot-two-shrinking-spheres-on-the

回答： xiaodong lu 2024-3-22

I have written some code for a project which works out the radius of droplets of water as a function of time (r1,r2) depending on the input variables (size,temp,velocity) and I want to plot two droplets on the same figure shrinking to compare the two. The code works fine with one droplet but when I try to plot two spheres at the same time I get the warning Warning: 'Error updating Light Exceeded the maximum number (8) of light sources' and the figure stops updating. Here is the plotting part of the code:

  for i = 1:size(r1,2)
        [X,Y,Z] = sphere ;
        if selection1(3)<5
            surf(X*r1(i),Y*r1(i),Z*r1(i), 'FaceColor', [0 0 0.07*selection1(3)])
        elseif selection1(3)<10
            surf(X*r1(i),Y*r1(i),Z*r1(i), 'FaceColor', [0.15*selection1(3) 0.15*selection1(3) 0])
        else
            surf(X*r1(i),Y*r1(i),Z*r1(i), 'FaceColor', [0.07*selection1(3) 0 0])
        end
        hold on
        
        if selection2(3)<5
           surf(X*r2(i)+0.001,Y*r2(i),Z*r2(i), 'FaceColor', [0 0 0.07*selection2(3)])
        elseif selection1(3)<10
            surf(X*r2(i)+0.001,Y*r2(i),Z*r2(i), 'FaceColor', [0.15*selection2(3) 0.15*selection2(3) 0])
        else
            surf(X*r2(i)+0.001,Y*r2(i),Z*r2(i), 'FaceColor', [0.07*selection2(3) 0 0])
        end
        
        light('Position',[-1 -1 -1],'Style','local')
        drawnow
        axis([-0.0005 0.002 -0.001 0.001 -0.001 0.001])
        pause(0.1)
    end   