Sectioning Point Cloud Data
VX provides a suite of ScanShape™ tools that allows you to work with scan data (from CMMs), point cloud data and imported STL data. Review the tools located on the Point Cloud Design Tool Bar. The commands are also listed in the Related Topics section below. You can also use these commands to section point cloud data so that you can fit surfaces through smaller subsections of the point or STL data. Refer to the basic operational sequence below.
The approach is to divide up the overly complex set of data into separate sections. Instead of one very large surface, several smaller, tangentially connected patches may be generated. Each patch can then be based on a portion of the input point data for which a common projection direction does exist. See Creating Surfaces from Point Clouds for more information.
This should both speed up the overall process and also enable the processing "360" degree scan data. Refer to the basic procedure below.
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VX provides export functionality for STL block objects. STL block objects, usually created via STL import or tessellating point cloud data, can be exported back as a standard STL file. This functionality supports any combination of multiple STL blocks and B-Rep solids in a part. The STL Export "1st quadrant" option, as well as both binary and ASCII modes are supported. This allows the selective export of through blanked objects. |
You can follow this basic procedure to section scan data (from CMMs), point cloud data and imported STL data.
Import the
scan data (from CMMs), point cloud data, STL data or activate a part that
contains point cloud data created by VX.
Use the Tessellate Scattered Data command to tessellate the
STL or point data into connected triangles.
Define a region
on the tessellated data using a set of curves. This is done by using any
of the existing 3D curve tools such as the Curve through
Points command and “tracing” along the tessellated data.
Use the Collect Nodes from Tessellated Data command to collect
the point data that is "enclosed" by the boundary curves you
created in step 3 above.
Use the Trimmed Face from Point
Cloud command to fit a surface through the points collected in step 4 using the curves from step
3 as the boundaries.
