Group Points into Block (3D)
Point Cloud Tool Tab
Use this command to group
a set of points and/or point blocks into a new point block. Optionally,
the input points and/or point blocks may be deleted after the point block
is created.
This command adds flexibility in handling a large quantity of point data by allowing you to group certain points into one object called a "point block." You can do this at any time, not only during the Import Points from File and the Reduce Point Cloud commands.
This can be used for situations when raw point cloud data needs editing before it can be "committed" to a point block (i.e., noisy data removal), or when a set of points needs to be separated into more than one region/section on the fly and so forth.
You can set or edit point block attributes by selection Attributes > Point or Edit > Attributes.
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You can create a point block from imported STL data using this command. Once created, you can then edit the point block using all of the current point block editing commands such as Explode Point Block and Remove Points from Block. The STL data can also be edited during this command using the Optional Inputs to Delete or Reduce (i.e., thin out) the STL point data. |
30,900 Point Entities = 1 Point Block
Delete input points
Check this box if you want to delete the original point cloud. Otherwise, all of the original points will be kept.
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If you plan to keep the original point cloud, you can use different layers to help manage point cloud data. Do the following before using this command. Using the Layer Manager, create a new layer with a name like "Original Point Cloud" and assign it to the original point cloud. Then create a new layer with a name like "Point Cloud Group" and make it the active layer. Then when you execute this command the point clouds will be kept separate and manageable. |
Reduce point set
Check this box to reduce the total number of points in the block and enter a reduction tolerance below.
Tolerance
The Reduce point set option above spatially sorts points and keeps only one point in each tolerance-sized region. If the tolerance is set to zero or left blank, then a guess is made at a reasonable tolerance. In the sample point file shown above, a tolerance of 0.01 reduced the total number of points by 85% (from 17,697 to 2,761). However, fewer points mean less accuracy but greater system performance.
Create a Point Block from Imported STL Data 
