In this article, you will learn how to use the server-side analysis tool. This allows you to compare a point cloud with a model on the cloud. This feature is also available in viewer analysis mode, which has the advantage of allowing comparison with all types of models as well as performing the analysis on part of the cloud only. Server analysis only works with IFCs and takes the entire selected cloud. Server analysis, allows you to do the processing only once and find your result in 1 click.
Please note that this tool is not free. To use it once, you need to exchange tokens. To buy tokens, go to your business management page or see the "tokens" article.
The point cloud / model comparison allows to compare a point cloud with a model. This tool helps you see if the model you created is close to the real item. You must remember though that a percentage of 100% is not achievable because sometimes the point cloud may have points in the wrong places (noise).
First, open your project in the viewer and select the server analysis option as shown in the image below.
The Analysis window has now opened, first select the point cloud you wish to use for the process.
You can then select the precision of the analysis, the smaller the number, the more precise your analysis will be.
Select the model you want to compare to your point cloud and click “Begin Analysis” to start the process. If your model is not aligned with your point cloud, make sure to move it before starting the analysis, you can follow the dedicated article to do this procedure. Also note that when starting a server side analysis, a new project version will automatically be created, saving your model's position, if you moved it.
You can check ou the server side analysis to check if the process is over. Analysis that are still in progress will be displayed with the “Ongoing” mention, once that mention is gone, you will be able to select your analysis to display it. Just press load to show the result.
You can click the reload button on the left of the select to reload the list.
As in the viewer analysis, you will find the 3 options allowing you to show different parts of the point cloud. Regarding the 2nd and 3rd options, points are displayed depending on wether they are are in or out of the tolerance defined by the 2 dots further from the middle, in our example to 10cm and -10cm.
The options are :
- All points (default): All points that have been calculated are displayed
- In tolerance : Only points close to the model are displayed
- Out of tolerance : Only points far from the model are displayed
You can change the tolerance using the analysis range slider, drag the 4 dots to change the tolerance according to your need, if you want to be more precise, move all your points closer to the middle, if you want to get a more global idea of what is wrong and what is right, place your dots closer to the ends.
ℹ️ You can also move the dots by clicking on them to select them, then pressing the arrows on your keyboard to move them up and down (useful for precise placement) ℹ️
You will see that changing the tolerance affects the validation percentage, bringing it closer to 100% when using a larger tolerance.
You can see that you have 2 different validation percentages, the first is the one calculated from the 2 middle points, the second from the 2 end points.
⚠️ The percentages we give you are indicative values, they cannot be taken for granted and are just there to give you an idea of the similarity between the point cloud and the models. ⚠️
In case of problem or difficulty, do not hesitate to contact the platform team.