Plotting 3D by rotate 2D plot around y-axis
I have a question to draw a 3D cup of coffe (no need to draw a handle). I think to be easy we need to draw 2 parabol ( inner and outter ) , the upper bound and bottom bound, then rotate that 2D plot around y-axis, but I dont have any idea and knowledge to do that, is there another way ? Can anyone help me with this, many thanks
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Probably the easiest way is to define a cylinder and a shape vector —
yv = [linspace(0.3, 1, 50)];
ys1 = yv.*exp(-1.75*yv)*5;
ys2 = (1-exp(-25*(yv-0.3)))*0.7;figure
plot(ys1, yv)
hold on
plot(ys2, yv)
hold off
grid
% xlim([0 1.5])
axis ('equal')[X1,Y1,Z1] = cylinder(ys1,50);
[X2,Y2,Z2] = cylinder(ys2,50);figure
surf(X1,Y1,Z1, 'EdgeColor','interp', 'FaceAlpha',0.5) % Outer Surface
hold on
surf(X2,Y2,Z2, 'EdgeColor','interp') % Inner Survface
patch([X1(end,:) X2(end,:)], [Y1(end,:) Y2(end,:)], [Z1(end,:) Z2(end,:)], 'r', 'EdgeColor','r') % Top Rim
patch([X1(1,:) X2(1,:)], [Y1(1,:) Y2(1,:)], [Z1(1,:) Z2(1,:)], 'b', 'EdgeColor','b') % Lower Surfacehold off
colormap(turbo)
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