Hello everyone,
I trust you are doing well. I’m requesting your invaluable guidance on a challenge we’re currently encountering.
We aim to perform deviation analyses between BIM models and point clouds generated from our construction sites. The intent behind this exercise is to validate that the construction project does not surpass specific tolerance thresholds with respect to the BIM model. Any deviation beyond the tolerances would compel us to implement adjustments on-site.
We have attempted to leverage third-party Revit plugins such as FARO’s As-Built for Revit and Autodesk’s Point Layout. However, we have found that the analysis results are unfortunately erased upon closing the Revit model. This requires us to rerun the analysis each time we reopen the model - a process which is proving to be quite unfeasible, as we need to share the analysis with on-site contractors via the Autodesk Construction Cloud.
Saving the analysis results as images would be an immediate workaround, but it falls short of our requirements. The contractors require the ability to take live measurements from the 3D model on the Construction Cloud, eliminating the need to create multiple elevation drawings for each facet of the building project.
At this point, we are considering a workaround that involves using the Sastrugi package to derive points from the point cloud, and then identifying the required building faces for the analysis. We plan to break these faces into smaller polygons. The points would then be clustered around the center of each polygon, and the distance between the polygon’s center point and the furthest clustered point would be used to establish a color range for the polygon surfaces. We would then override the colors of adaptive components within the Revit project based on these colors. We anticipate that this would enable the deviation analysis colors to be viewable on the Construction Cloud.
However, we recognize that this proposed solution could prove computationally intensive, which might pose a challenge for Dynamo.
One alternative we’ve considered is acquiring a Trimble X7 scanner that allows for on-site deviation analysis. However, the associated cost is currently beyond our budget.
Consequently, we’re reaching out to this knowledgeable community for any potential alternative suggestions. Could the VASA package assist in this situation, or are there other strategies we should explore?
See a sample image of the deviation analysis below.
Thank you in advance for your assistance and insights.
@jacob.small @solamour @Ewan_Opie @Alban_de_Chasteigner @GavinCrump @rhys.goldstein
