Building Information Models continuously change during the various phases of design and documentation. Keeping track of changes made by all the members of the team is very important and can be challenging.
Archicad's Model Compare lets you compare two 3D models, then visualize and filter the differences between them.
Users can keep track of design changes accurately and even evaluate design variants.
The two models being compared can be any of the following:
What do we compare?
What is the basis of comparison?
Types of changes between the two models can be:
The Model Compare command is accessible from the Design menu. It generates a view of the two compared models in a separate window.
In the Model Compare window, use the Model Compare Palette to filter, list, and zoom to the model changes, and get feedback on which parameters have changed.
In Teamwork, there are two different commands for Model Compare:
This workflow is recommended for the following scenarios:
This workflow is recommended when you want to compare the content of two different views of the same project, e.g., two different 3D views: the existing and the proposed site plan.
In this case, Model 1 and Model 2 will both be the current model. You need to use the View Selector button that opens the Select View dialog.
To be able to select these two views to be compared, uncheck the Apply Common View Settings checkbox.
You can also check what has changed in your project as a result of a hotlink update. Check the optional Compare Models after OK checkbox in Hotlink Module Manager, hit Update then OK. Once the hotlink update process is ready, the Model Compare window opens automatically and the changes are displayed.
Use this workflow when the structural engineer has sent the revised analytical model back to you after carrying out structural analysis.
In this workflow, select the current model for Model 1. For Model 2, browse for the SAF file (Structural Analysis Format) sent by the structural engineer.
Click the View Selector button. The Select View dialog opens.
Open the Model panel of the dialog, select Structural Analytical Model, then activate the components you want to display in the Compare window. Then hit Compare.
The components can be the following:
See also Select View for Compare in the next section of this article.
View selection can be significant: an element’s modified status is considered by view.
Two different scenarios are possible:
In both cases, you can review their view settings in the View Properties panel, right below the 3D Views selection panel.
By default, the Model Compare palette lists all 3D model changes resulting from the Compare process. Use the Filter buttons to narrow the list of changes shown here and the list format options.
By default, all changed elements are shown in the list. You can narrow down the list by defining the criteria for the elements to be shown. Use the Filter by Criteria button to access the Find & Check dialog where you can set up your custom criteria set.
Using Project Change Tracking (in Teamwork), you can filter to see element changes by Subscription.
Learn more about Tracking Changes in Teamwork Projects in this article.
Click on the Filter by Parameter Sets button. Check/uncheck the type of modifications that you are interested in. Items that have changed based on the checked parameters are listed.
Available parameter sets vary depending on the chosen Model type: Physical Model or Structural Analytical Model.
Click the Settings button to set format options. In the appearing pop-up, check or uncheck the boxes to define your preferred list format. Drag and drop the list items to change their order.
After the Compare command is run, the Model Compare window displays the model with colored highlights and other feedback on changes.
The Model Compare palette is docked at the left edge of this window (this palette cannot be moved).
In the Model Compare window Archicad highlights elements that are
Modified elements are shown in a blended color. Different colors are used for different types of modifications.
Customize the colors used by Model Compare at Options > Work Environment > On-Screen Options.
At the end of the model comparison, you can create issues if needed. See the related article here.