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Point Clouds

Matthew D. Hoedeman
Did some scanning last week. Had 2 pointclouds in the program. I exported both point clouds (one at a time) into XYZ files using the current alignment.

These point clouds pull into Geomagic just fine. I wanted to show something to someone today in the program, and one of the point clouds was empty. I did not empty it. It was still there when I saved the program after I exported both point clouds.

So, I tried to import the missing point cloud. It will not import into the correct location, as it it is off by almost 2000mm. I even tried using each alignment in the program, and NONE of them will import the point cloud into the right location.

What is going on with this?
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  • Usually I do not notice it until I reopen the file a few days later as Matt is stating. Only happens once in a while.


    I was able to successfully recover the pointcloud today.


    I went into the file where I have my programs saved and changed the name of the "^" and "~" files that PCDmis creates. Opened it up, and the model and cloud were not present. I imported the CAD file from the original file that I originally lost the pointcloud from and the point cloud re-appeared with no lost points.


    Maybe all you have to do is reimport the CAD file..... not sure at this time, I guess I will not know until the next time it happens.


    Also, has anyone else had their color map change when they reopen a file. i.e., you have complete coverage in your color map( and that is what you see in the little preview window when reopening it ) when you save, but then when reopen it, it is an earlier colormap where you didn't have complete coverage. Then you have to delete the colormap and redo it and you get back what should have been there in the first place.
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  • Usually I do not notice it until I reopen the file a few days later as Matt is stating. Only happens once in a while.


    I was able to successfully recover the pointcloud today.


    I went into the file where I have my programs saved and changed the name of the "^" and "~" files that PCDmis creates. Opened it up, and the model and cloud were not present. I imported the CAD file from the original file that I originally lost the pointcloud from and the point cloud re-appeared with no lost points.


    Maybe all you have to do is reimport the CAD file..... not sure at this time, I guess I will not know until the next time it happens.


    Also, has anyone else had their color map change when they reopen a file. i.e., you have complete coverage in your color map( and that is what you see in the little preview window when reopening it ) when you save, but then when reopen it, it is an earlier colormap where you didn't have complete coverage. Then you have to delete the colormap and redo it and you get back what should have been there in the first place.
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