IFC for Revit Files

This directory contains installs based on the IFC code for Revit 2018 and Revit LT 2018.  New installs will be created when:
- There is a major Revit release or update release that affects IFC.
- There is a critical change to the source code.
- Periodically, if any significant changes have been made since the last install.

Version Log:

(19.1.0) IFC for Revit 2019 v19.1.0.msi
IFC for Revit 2019 Source v19.1.0.zip

General:

- Some of the naming conventions for elements have changed.  Please discuss in the forums if this causes problems.
- This is generally a bug fix release with some new Link IFC functionality.

New Export Functionality:

- Add the ability to import and export custom configuration setups.
- Add the ability to choose the project origin of the exported file.  There are 4 options:
	- Current shared coordinates origin
	- Internal Revit coordinates
	- Project Base Point
	- Site Survey Point
- A number of IFC4 Reference View improvements, including:
	- Export some profile names with geometry when appropriate
	- Fix scaling of triangulation coordinates
	- Improve export of beam axis
	- Restrict use of many disallowed IFC entities and geometries
- Allow columns to be space bounding elements.
- Allow remapping of IFC entity attributes in addition to properties.
- Create more associated type entities for IFC objects.
- Consistent ability to override name, object type and description for all entities
- Export connectors even if they aren't connected to other elements.
- Export parts whose host elements are in linked files, regardless of if "Export Parts as Building Elements" is checked or not.
- Improved creation of IFCBUILDING and IFCSITE entities
- Better support for Illuminance and Volume parameter types.
- Include the exchange requirement information in the File Header for COBie export.
- New UI to allow assigning the address filled out in the export options to the building and/or site.
- Reduce the facet count for some element geometries.
- Support export of fabrication parts.
- Remove unneeded "Triangulation only" checkbox in the "Level of Detail" export options tab.

Export Bug Fixes:

- Export "NetVolume" and "NetSideArea" quantities instead of "Gross" ones.
- Export PredefinedType/ShapeType for ramps, stairs and vibration isolators.
- Fix export of certain elements so that they are of the right type instead of IfcBuildingElementProxy orIfcBuildingElementProxyType.
- Fix export of some multi-story stairs.
- Fix export of some space with empty Occupant fields.
- Fix material assignment for some elements.
- Fix missing predefined type for some elements.
- Fix missing profile names for some beams.
- Fix slope calculations for some elements.
- Fix unexpected error when exporting a floor as an IfcRamp (for IFC2x3 only).
- Fix unexpected error when exporting a site from a 3D view when exporting the active view geometry (for IFC4 RV only).
- More fixes to correct "unexpected errors" of certain entity types.
- Only allow unconnected elements if they are of type IfcDistributionElement.
- Restore calculations for "concealed" and "is external" properties.
- Restore proper mapping of Revit Grids to IfcGrids.
- Restore proper GUID for some door, windows, and property sets.
- Restore remapping of some deprecated IFC2x3 and IFC4 entitites.
- Restore support for parameter mapping files.
- Restore support for provisions for voids in IFC2x3.
- Restore support for IfcSpace "ElevationWithFlooring" attribute.
- Restore tag for IfcCurtainWallType.
- Restore tessellation level of detail for coarse tessellations.
- Restore use of built-in parameters for populating some IFC parameters.
- (Pre-IFC4) Stop converting space heater types to electric heater types.
- (IFC4) Properly export some trimmed edges in advanced BReps.
- (IFC4) Limit distribution ports to IfcDistributionElements only.

New Import Functionality:

- (IFC4) Support IfcCartesianPointList2D, IfcIndexedPolyCurve

Import Bug Fixes:

- Accept structural items that have an undefined LoadBearing parameter.
- Better processing of slightly non-planar faces.
- Better processing of some sweeps that have unnecessary start and end parameters.
- Correct orientation of some objects on import with incomplete placement information.
- Make sure all created schedules and parameters have unique names.
- Improve import of some circular extruded geometries whose outer profile curves are slightly disjointed.
- Improve use of shared geometry across different type elements.
- Properly cut some geometry when the bounded curve for the half-space solid is missing.
- (IFC4) Better import of some geometry with NURBS curve-based edges.