Plot 3D line object with alpha gradient

2012 2 7
2 个回答
回答已采纳
更新时间：2013 10 4
2 次查看（30 天）

0 个投票

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

请先登录，再回答此问题。

 采纳的回答

0 个投票

amap = linspace(1,0,size(p,1))';
set(mfig,'FaceColor','none','EdgeColor','flat',...
'LineWidth',3,'FaceVertexAlphaData',amap,...
'EdgeAlpha','interp');

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Filip Persson
Filip Persson 2012-2-7
Hi Jonathan,
Unfortunately it doesn't work; I get the following message
Warning: Patch FaceVertexCData length (0) must equal
Vertices length (233) for flat EdgeColor
Do you know what it means?
Thanks for helping me out!
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!

请先登录，再进行评论。

更多回答（1 个）

Filip Persson
Filip Persson 2012-2-8

0 个投票

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)));

类别

在 帮助中心 和 File Exchange 中查找有关 Logical 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by