Wall Flatness - With CAD Data with BuildIT Construction

Tutorial Download

If you would like to download the file used in this article, download the accompanying Training Data and extract its contents to a folder on your PC.

Activate the View of the Wall

Open the “Module 7.3.buildit” file by selecting “File> Open” and navigating to where the file is saved.

• Activate the “Wall to Analyze” view.
  • Right click the view named “Wall to Analyze”.
  • Select “Restore View”. You may also use the “First person view” to navigate to the area of interest.
    

Associate Scan Data to CAD Surfaces

• Now the scan data should be associated to CAD surfaces. This allows the software to only perform analysis with scan points that are near CAD surfaces, speeding up the process.
  • Select “Refine > Auto Associate”.
  • For “Clouds”, select the Cloud1 point cloud
  • For Geometries, select the wall with the three doorways, "surface p2590".
  • Ensure “Exclude points farther than” is checked with a value of 6 inches. This option will only search out up to 6 inches for points to associate. If the cloud is farther than 6 inches, it will be ignored.
     
  • Select “Apply” and view the result below:
    

Perform Surface Analysis

• Now that the points have associated to our CAD, we can perform surface analysis.
  • Select “Evaluate > Surface Deviation Analysis”.
  • For “Surfaces”, select the wall with the three doorways, "surface p2590". This will pull all points associated to the surfaces.
  • Set the “Maximum Search Distance” to 6 inches, mirroring the distance set in the Associate command.
  • Select Preview   to review the analysis.
    
  • For “Color scale”, set it to Rainbow – Red-Green-Red. This will make points that are out of tolerance yellow to red and points that are within tolerance green.
  • For “Analysis mode”, select “Colored cloud”.
  • For the “Limits”, change to “User-defined”. The tolerance used for this exercise will be 1 inch. Enter 1 for “Upper tolerance” and -1 for “Lower tolerance”.
    • Note: You can also use USIBD Lower or Higher Range for Color Scales.
      
  • Select “Apply” and view the result below:
    

Create Annotations

• Now, annotations are needed to represent the deviation we see between the scans and CAD.
  • Select “Evaluate > Surface Inspection Annotation”.
  • Select the Minimal annotation (3D only) radio button.
  • Select a scan point to annotate, then select Apply  to create the annotation, or middle mouse click.
     
  • Repeat the previous step until several annotations have been created, use Set View to save a view with the annotations. Name it Deviation Analysis.
    

Create a Report from the Annotations and Analysis

• Include the items created on a report.
  • Select items to include in the report.
    • Include the two views created, the analysis, and the annotations.
  • Right click and select “Add to Report”.
  • If the items are not in the intended order, they can be moved up or down by selecting and dragging the item.
    
  • Select Run to create the report.