How can I make points show through a surface plot?

I have code that makes a centerline (left) then creates a surface around that centerline (right). I'd like the centerline points to show through the surface so I can still see them while I rotate it around. How can I do this?

Edit: To be more clear, I am specifically not looking for the entire surface to be transparent. I don't want to see the back side of the surface showing through, just the centerline.

Answer 1

[Chunru]

% Plot a sphere and a line 
[x, y, z] = sphere;
h = surf(x, y, z);
hold on
plot3(-1:1, zeros(3,1), zeros(3,1), 'r', 'LineWidth', 3);
h.FaceAlpha = 0.5;   % make it transparent to see inside

[Samuel Harvey]

Thanks, but this isn't quite what I'm looking for. I don't want anything else to show through besides the centerline.

[Chunru]

Then you can use two axes:

ax1 = axes('XLim', [-1,1], 'YLim', [-1,1], 'ZLim', [-1,1]);
view(3);
ax2 = copyobj(ax1, gcf);
[x,y,z]=sphere;
h = surf(ax1, x, y, z)

h = 
  Surface with properties:

       EdgeColor: [0 0 0]
       LineStyle: '-'
       FaceColor: 'flat'
    FaceLighting: 'flat'
       FaceAlpha: 1
           XData: [21×21 double]
           YData: [21×21 double]
           ZData: [21×21 double]
           CData: [21×21 double]

  Show all properties

plot3(ax2, -1:1, zeros(3,1), zeros(3,1), 'r', 'LineWidth', 3);
axes(ax2);
box off
axis off

[Samuel Harvey]

Perfect, that's what I'm looking for. Thank you!