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Jainsworth

3D Loci density

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Hi all,

 

I have some LiDAR data that I am attempting to play around with and create a site model. The data is free from the Environment Agency (UK) and I have it as a DXF at 1m resolution.

 

Unfortunately, due to the size of the field, and the density of 1 3D loci per metre, there are a mere... 782,864 3D Loci on my drawing. This is causing an insane amount of lag for me!

 

I note that there is a simplify 3D polygon command, but as these are loci and not polygons, I am assuming that this does not work for this data type. Is there any other approach I can take to make the data more manageable?

 

Any ideas would be appreciated.

 

Thanks

 

Joe

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Hi, Joe

I think what you want is the Extract Loci from Point Cloud command. It's in v2019.  Command is in the bottom of the Model menu in the Point Clouds heading.

 

It has parameters for number of loci to extract.

 

Here is a link to the Help topic on this:

http://app-help.vectorworks.net/2019/eng/VW2019_Guide/SiteModel1/Extracting_3D_Loci_From_a_Point_Cloud.htm?rhhlterm=point%20cloud&rhsyns=%20

 

Here is link to a short video demo for this and a couple other Point Cloud features in v2019.

https://www.youtube.com/watch?v=IZLxdtgVC8A

 

Your signature shows v2018. Look for them, but I don't think v2018 includes any of these features.

 

-B

 

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@Benson Shaw

 

Hi Benson,

 

Thanks for the reply, I do actually have 2019 I just haven't got around to updating my signature (can't remember how, i'll have a look now).

 

Cheers!

 

Joe

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6 hours ago, Benson Shaw said:

Hi, Joe

I think what you want is the Extract Loci from Point Cloud command. It's in v2019.  Command is in the bottom of the Model menu in the Point Clouds heading.

 

It has parameters for number of loci to extract.

 

Here is a link to the Help topic on this:

http://app-help.vectorworks.net/2019/eng/VW2019_Guide/SiteModel1/Extracting_3D_Loci_From_a_Point_Cloud.htm?rhhlterm=point cloud&rhsyns=

 

Here is link to a short video demo for this and a couple other Point Cloud features in v2019.

https://www.youtube.com/watch?v=IZLxdtgVC8A

 

Your signature shows v2018. Look for them, but I don't think v2018 includes any of these features.

 

-B

 

Thanks for that @Benson Shaw I didn't realize that this feature was part of VW 2019.

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In 2018 you could turn the point cloud into 3d loci, it just wasn't as straight forward. Also, I think it was called something different, like "convert to 3d points" or something. 

 

Anyway, to the question at hand, you can decimate the point cloud when generating the 3d loci based on a percentage. though the better thing is to start by cleaning it up and filtering outliers and then decimating. 

 

However, ~800,000 points is a pretty light-weight point cloud (which is probably fine for a terrain mesh), so I don't get why it would be lagging on your computer. I have some dense scans of about 7MM points that load pretty darn quickly (relative) and have next to no lag while navigationg on my MS surfacebook 2 i7

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