Plotting a 3D millstone with surfaces
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Markus Reichel
on 22 Jun 2022
Commented: Star Strider
on 22 Jun 2022
I need to plot a Millstone with given radius (outside and inside), aswell as a given thickness.
As seen below I can plot the circles but don´t know how to produce the surfaces.
any help would be much appreciated.
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Accepted Answer
Star Strider
on 22 Jun 2022
I am not certain what you want.
Try something like this —
[X1,Y1,Z1] = cylinder(0.2,50);
[X2,Y2,Z2] = cylinder(1.0,50);
Z1 = 0.25*Z1;
Z2 = 0.25*Z2;
C = [1 1 1]*0.5;
figure
hs1 = surf(X1, Y1, Z1, 'FaceColor',C, 'EdgeColor','none');
hold on
hs2 = surf(X2, Y2, Z2, 'FaceColor',C, 'EdgeColor','none');
hp1 = patch([X1(1,:) flip(X2(1,:))], [Y1(1,:) flip(Y2(1,:))], [Z1(1,:) flip(Z2(1,:))], C, 'EdgeColor','none');
hp2 = patch([X1(2,:) flip(X2(2,:))], [Y1(2,:) flip(Y2(2,:))], [Z1(2,:) flip(Z2(2,:))], C, 'EdgeColor','none');
hc1 = plot3(X1(1,:), Y1(1,:), Z1(1,:), '-', 'Color',[1 1 1]*0.3);
hc2 = plot3(X1(2,:), Y1(2,:), Z1(2,:), '-', 'Color',[1 1 1]*0.3);
hold off
material('dull')
lightangle(gca,-45,30)
lighting('gouraud')
axis('equal')
rotate([hs1,hs2,hp1,hp2,hc1,hc2], [0 1 0], 90)
Make appropriate changes to get the result you want. The ‘hc1’ and ‘hc2’ plot3 calls outline the centre void a bit more distinctly.
.
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