Sandbox:TutorialBIMannex

= Goal of this document =

Try to investigate:
 * a parallel workflow in FreeCAD and BlenderBIM
 * make a detailed ifc4 model both Freecad and BlenderBim
 * produce documentation from both

Currently this document is WORK in Progress. Participation is always welcome.

Project description
Creating a simple freestanding annex to a country summerhouse.

Existing and proposed



Functional requirements
Designed as three (possibly Four) adjoining 'buildings', from left to right in below images and sketches.
 * One (Leftmost)
 * Kids playhouse with elevated 'bedroom'
 * Second
 * Sanitary
 * Third
 * bedroom
 * Fourth
 * Eavaluating
 * Maybe Storing of firewood and Garden Utensils

Initial Sketches


= Modeling approach = This is a minor project, but large enough to investigate and document different approaches.

Some main initial thoughts

Project should

 * Use OpenBIM, IFC4
 * Validated
 * Geo-located
 * Models
 * Documentation
 * Produce qty Takeoff

Divide project files by discipline

 * Landscape
 * Terrain
 * Structural
 * Architectural
 * MEP
 * Mechanical
 * Electrical
 * Plumbing
 * Interior

BIM Project
Must Contain, ref BuildingSmart
 * Project
 * Name, DH


 * Site
 * Name, SV
 * Building(s)
 * Name, B01
 * Name, B02
 * Name, B03
 * Floor(s)
 * Name, 0 Foundation
 * Name, 1 Etasje
 * Name, 2 Etasje
 * Name, Roof

= FreeCAD = Modeling the project in FreeCAD = BlenderBim = Modeling the project with BlenderBIM
 * Versions used
 * 201207 (December 07th 2020)
 * 200829 (August 29th 2020)
 * 200813 (August 2020)


 * BlenderBIM documentation
 * Builds

Show number of objects selected in Python Console


In ViewPort Overlays pulldown, check Statistics. This will place Statistics in the viewport.

DoubleDoor
DoubleDoor Opening



If we assume 20mm Clearance each side, this gives L = 2210 H = 2060

BlenderBIM Project Setup
We need to beware that project setup refers to to separate setups. The Blender Project setup, and the BlenderBim project setup. These are basically totally separated, and serve different functions.
 * Blender Project setup
 * deals with organization of blender files and assets.
 * BlendeBIM project setup
 * organizes IFC structure, internal to file.

Useful links

 * blender-collection-instances-ifc-export

= Blender Tips =

Project Setup
Organizing files soon comes vital, plan ahead, avoid spaghetti syndrome

Some links
 * Organize-blender-3d-projects
 * How-to-organize-your-blender-files
 * Blender in Architecture

Linked Models
In order to produce a multidisciplinary approach, containing several model. Model should for BIM purposes be linked, not appended

Is Linking Files Good Practice? ''The biggest advantage of linking is that it makes files easier for Blender to compute. It also makes it easier for you to manage - provided you have a coherent structure. The Linked Library Addon can be considered essential for workflow.

Setting the background in one file that you linked in, should give no problem, and you will probably wish you did it sooner''

The steps are the same as appending: File > Link or Ctrl+Alt+O, find the .blend file to link from, then select the element you wish to link, and click Link from Library in the top right.

As a resource: there is an excellent explanation on - Jason's Blog

Resources

 * Blender-2-8-technical-drawing-architecture-ebook (Amazon)

= Harvesting from IFC = IfcOpenShell_code_examples