You can export Revizto models to IFC files. Then you can import them to other Revizto projects or authoring tools.

• Limitations
• Configuring export settings
• Overriding IFC type assignment rules
• Exporting models to IFC files

Limitations

Export of Revizto models to IFC files has the following limitations:

• The export is available only on Microsoft Windows.
• Point clouds exported from Revizto to an IFC file cannot be imported back to Revizto.
• Automatic IFC type assignment is available only if the language of the model properties is English.
• If you want to use the resulting IFC files in another Revizto project, import them to the project directly. Importing the IFC files to an authoring tool and then to Revizto might cause data inaccuracies.

Configuring export settings

You can configure the settings for exporting models to IFC files using the "Revizto 5 settings of export to IFC" utility.

To configure export settings:

1. Open the Revizto 5 Settings of Export to IFC application. You may need to search for it in the Windows start menu. 

2. Select the checkboxes next to your desired export options.

   Option	Description
   Export point cloud models	Export point cloud models. It is recommended that you do not export point clouds to federated models. You will have the option to choose the destination model type (regular or federated) during the export.
   Run in parallel threads	Export each model in a separate thread. This speeds up the export but requires more RAM. This option does not apply to export to federated models. You will have the option to choose the destination model type (regular or federated) during the export.
   Export source GUIDs	Export GUIDs of Revizto objects to IFC GUIDs. For each object, Revizto will look for its GUID in the following properties: Revizto / Ifc Guid Item / GUID IFC / GLOBALID The first GUID that is found will be exported to an IFC GUID. If you clear the checkbox, Revizto will generate random IFC GUIDs.
   Export entire model hierarchy	Export the entire model hierarchy. If you clear the checkbox, only geometries and composite objects will be exported. This is how export to IFC was performed in Revizto versions 5.9 and earlier.
   Export height to RefElevation	Export the height of Revizto objects to the RefElevation property of IfcSite objects. Use this option if you want to view the resulting files in an authoring tool that requires filling RefElevation. If you clear the checkbox, the RefElevation property will be blank.
   Export height to LocalPlacement	Export the height of Revizto objects to the Z-value of the LocalPlacement property of IfcSite objects. If you clear the checkbox, the Z-value of the LocalPlacement property will be blank. Use this option if you want to view the resulting files in Revit and you selected the Export height to RefElevation checkbox.
   Swap local placements of IfcSite and IfcBuilding	Swap local placement coordinates of IfcSite and IfcBuilding. This is required for correct import of the resulting IFC files to Revit 2022 or earlier.
   Assign object types	Assign IFC object types whenever possible (based on Revizto model properties). If you clear the checkbox, all objects will have the default types: IfcBuildingElementProxy for leaf objects and IfcBuildingElementPart for branch objects.

3. Click OK.

Overriding IFC type assignment rules

The export settings include the option to assign IFC object types automatically.

Revizto assigns the IFC object types based on Revizto model properties. If the resulting IFC types are incorrect, you can override the type assignment rules in the configuration file.

• Configuration file example
• Configuration file syntax
• Configuring IFC type assignment rules

Configuration file example

The following is an example of the configuration file that overrides IFC type assignment rules. For the description of the file syntax, see Configuration file syntax.

{
    "AssignTypes": true,
    "TypeMappings": [
        {
            "IfcType": "IfcRoof",
            "Conditions": [
                {
                    "Property": "Revit-Typ > Familienname",
                    "Value": "Basisdach"
                }
            ]
        },
        {
            "IfcType": "IfcCovering",
            "Conditions": [
                {
                    "Property": "Other > Type",
                    "Value": "Concrete Deck - Tapered Insulation",
                },
                {
                    "Property": "ElementId > Value",
                    "Value": "140056",
                    "Negate": true
                }
            ]
        }
    ]
}

Configuration file syntax

The configuration file that overrides IFC type assignment rules is a plain text file.

• Top-level parameters
• Rule parameters
• Condition parameters
• Skipping parameters

See also:

• Configuration file example

Top-level parameters

The file contains the following top-level parameters:

Rule parameters

A type assignment rule includes an IFC type and one or several conditions. The IFC type is assigned to an object when it meets at least one of the conditions.

Condition parameters

A condition checks whether a property value is equal to or not equal to the specified value.

Skipping parameters

You can skip any parameter by adding a hyphen before its name. Revizto will ignore commented parameters.

Example:

"-Negate": true

Configuring IFC type assignment rules

To override the type assignment rules:

1. In the Revizto working folder, find the file ifc_type_mapping.txt.

   If the file is not available, create it.

2. Add or edit the type assignment rules.

   For detailed information, see Configuration file syntax.

Exporting models to IFC files

You can export models to IFC files if you have the "Export project to IFC" access right.

There are two ways to export Revizto models to IFC files:

• Exporting models from Revizto (unloaded models and hidden objects are not exported)
• Exporting models from the command line (all models and objects are exported)

See also:

• Resulting file names

Exporting models from Revizto

To export models from Revizto:

1. Configure the export settings.

2. Open the project that you want to export.

3. Do one of the following:

   • Isolate the models that you want to export.

   • Unload or hide the models that you do not want to export.

4. At the top of the application window, go to Project > Export to IFC.

5. In the IFC specification field, select the IFC schema specification version.

6. Select the destination folder.

   Once you select the folder, Revizto starts the export.

7. If your export settings include assigning IFC types based on model properties, review the resulting IFC files. If any of the types are incorrect, override the type assignment rules.

Exporting models from the command line

You can export models to IFC files using the ExportToIFC command-line utility provided with Revizto.

To export models from the command line:

1. Configure the export settings.

2. Find ExportToIFC.exe in <Revizto installation folder>\Bin.

   The default path is:

   • For Revizto 5.10 or earlier:

     C:\Program Files\Vizerra LLC\Revizto5\Bin\ExportToIFC.exe.

   • For Revizto 5.11 or later:

     C:\Program Files\Revizto SA\Revizto5\Bin\ExportToIFC.exe.

3. Run the utility in the command line.

   See Syntax and Examples.

Syntax

When you run the ExportToIFC utility, use the following syntax:

ExportToIFC <--from> <--to> [options]

For the description of arguments and options, consult the following table. If any value that you provide includes spaces, enclose it in double quotation marks.

Examples

Export to an IFC 4 file without filling the author details:

ExportToIFC.exe --from "C:\Users\User\AppData\Local\Revizto5New\400155" --to "C:\IFC models"

Export an IFC 2x3 file with filling the author details:

ExportToIFC.exe --from "C:\Users\User\AppData\Local\Revizto5New\400155" --to "C:\IFC models" --ifc 2x3 --first-name John --last-name Doe --company "My company" --department "My department"

Resulting file names

Revizto assigns IFC file names as follows:

• If you select the Federated file checkbox during the export, the resulting file name is <project title>.ifc.
• If you clear the Federated file checkbox during the export, each model is exported to <model name>.ifc.