Plot 3D line object with alpha gradient

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Filip Persson
Filip Persson 2012-2-7
编辑： Jeremy 2013-10-4
Dear all,
I have a 3D point set which I would like to plot as connected line segments. In addition, I would like the points (lines) furthest away (from the point of perspective) to appear more distant by having an alpha gradient, i.e points closer to the viewer should have higher alpha values than those further away (like looking in a fog).
I tried using
mfig=patch(p(:,1),p(:,2),p(:,3));
set(mfig,'facealpha',0);
set(mfig,'edgealpha',...
and then play with the different alphamappings but unfortunately I don't get it to work.
Does anyone know how to do this (if possible)?
Thanks!
Cheers, Filip

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采纳的回答

Jonathan Sullivan
amap = linspace(1,0,size(p,1))';
set(mfig,'FaceColor','none','EdgeColor','flat',...
'LineWidth',3,'FaceVertexAlphaData',amap,...
'EdgeAlpha','interp');
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Walter Roberson
Walter Roberson 2012-2-7
Try adding
'FaceVertexCData', ones(size(amap))
Filip Persson
Filip Persson 2012-2-8
It works!
Thanks to Jonathan and Walter!

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更多回答（1 个）

Filip Persson
Filip Persson 2012-2-8
The working script:
amap = linspace(1,0,233)';
mfig=patch(p(:,1),p(:,2),p(:,3),'red');
set(mfig,'facealpha',0);
set(mfig,'FaceColor','none','EdgeColor','flat',...
'LineWidth',3,'FaceVertexAlphaData',amap,...
'EdgeAlpha','interp',...
'FaceVertexCData', ones(size(amap)));

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