I am trying to filter a subset of points from a pointcloud inside Revit using the node PointCloud.GetPointsFromBoxSelection from the Steamnodes package. However the points that are being returned are not lying correctly within the 3d selection box. See image 1. The ‘shape’ of the returned points s…

I believe I have it. It was a meter / millimeter mismatch. The filtered points, coming out of the first python script in the dyf, are being returned in METER coordinates. So these are pretty small values. These are point coordinates relative to the pointcloud origin. [image] The current location…

check the sastrugi package, there might be something there https://sites.google.com/view/sastrugi/nodes

Thank you. I had already tried the Sastrugi node Pointcloud.SelectPointsInView, but I can’t get that node to return points. It returns null. I don’t know what I am doing wrong. After some initial tryouts I liked the Steamnodes node better. At least I got it to return points, albeit in the wrong pla…

*re-bump … is there anyone out here who has used one of the following nodes… -Sastrugi PointCloud Select Points in View -SteamNodes PointCloud.GetPointsFromBoxSelection …and was able to use them in a successful way? If so, could you please share with me a small explanation of how you did it? W…

do you have the latest version of sastrugi? there was an important update of that node in May

Yes, I believe I downloaded the most recent version around two weeks ago…

A little bit more background about the Steamnodes PointCloud.GetPointsFromBoxSelection node: The node is a .dyf, so we can have a look inside… it looks like this: [image] following my hypothesis that something goes wrong at the transformation, lets have a look at the python script at the red arr…

Here is a preview of what happens when I use the Sastrugi node … cant get it to work … [com-video-to-gif]

maybe feed a bounding box in the point sample size input?

I am getting a little further about what happens inside the Steamnodes PointCloud.GetPointsFromBoxSelection .dyf. The python script at the red arrow returns 4 points. The first point is probably the pointcloud’s (transformed) origin location. This numbers matches with what I see in Revit. [imag…

PointCloud.GetPointsFromBoxSelection returns points at wrong coordinates

Revit

jnoordzij November 6, 2019, 6:16am 5

@Ewan_Opie can you give an example of how to use the sastrugi node?

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PointCloud.GetPointsFromBoxSelection returns points at wrong coordinates

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