Extracting point cloud from patch model

2017 6 5
1 个回答
更新时间：2017 6 8
5 次查看（30 天）

0 个投票

Hi everyone, So I have a model I created using patch function and I need a point cloud of said model to play around with the depth information, so I was wondering if it is possible or not to extract a point cloud from a model and if yes how would I go about on doing so?

7 个评论
显示 5更早的评论 隐藏 5更早的评论

KSSV
KSSV 2017-6-6
More details needed.....show us your model and what you expecting.
Alla
Alla 2017-6-6
编辑：Alla 2017-6-6
Thank you for your reply, here is the model in question,what I am exprecting is simply to have a point cloud of the model
Walter Roberson
Walter Roberson 2017-6-6
If you are expecting that each of the cuboids would become a whole bunch of points inside the volume of the cuboid, then you would need to do interpolation of some sort, or volume rendering.
KSSV
KSSV 2017-6-6
Is this model created in matlab?
Alla
Alla 2017-6-7
编辑：Alla 2017-6-7
Thank you both for your replies, I created the model on Matlab using Patch function and I only need a point cloud of the surfaces not the volume.
Walter Roberson
Walter Roberson 2017-6-7
The patch object does not store the surface points, only the vertices.
KSSV
KSSV 2017-6-8
If you have the vertices in hand..you can create the surface using meshgrid.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2017-6-6

0 个投票

There are two ways of constructing patch objects.
  • For one of them, you can fetch the XData, YData, and ZData properties. Each column represents a face, so there are as many rows as the longest face; shorter faces have NaN to pad them out
  • For the other, more efficient one, you can fetch the Vertices property to get a matrix in which each row defines a unique point. The Faces property gives information about how the vertices are connected.

类别

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

标签

提问:

Alla
Alla
2017-6-5

评论：

KSSV
KSSV
2017-6-8

Community Treasure Hunt

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

Start Hunting!

Translated by