IFC importer for threejs

[kdilayer]

I have written an ifc 2x3 importer for threejs. It is very experimental but most of the objects will render.

Is this something that can be included in the distribution ? My hope is that someone would develop it further and eventually also add support for ifc4

Example of imported ifc:

[kdilayer]

forgot to mention that it depends on ThreeCSG

[mrdoob]

Never heard of this format. Where is it usually used?

[kdilayer]

As far as I konw, It's used mainly in the construction business, building modeling. Supported by Autocad, Revit, Tekla and Solibri to mention a few.

[mrdoob]

I see I see!
What does it need ThreeCSG for?

[kdilayer]

For example; a Wall object (extruded shape in threejs) might have an opening. And the easiest solution I found was to use ThreeCSG. Also used in other cases like IfcBooleanResult.

Link to the IfcOpeningElement spec:
http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcproductextension/lexical/ifcopeningelement.htm

[johnney88]

you can reference at
http://www.ifcquery.com

[fraguada]

@mrdoob , IFC stands for Industry Foundation Classes and is meant to be a standard exchange format for Building Information Model/Management (BIM) projects. Software packages typically related to this are Revit, ArchiCAD, VisualARQ, and quite few others. While I am generalizing, BIM software provides standard object types such as walls, slabs, roofs, stairs, windows, etc all driven by a family/style definition where the operator defines the parameters for the object. Therefore if I have a wall with a layer of CMU, Plasterboard, and Tile, I can define the thicknesses of all of the layers. I something changes, I change the family/style definition, and everything automagically updates! Reality is not so magical! It is a contentious format, as each software vendor is free to play around with the definition of what a wall may constitute in import/export http://buildingsmart.org/compliance/certified-software/.
It is a great format to support, and I thank @kdilayer for setting it up. @johnney88 is that viewer using threejs?

[johnney88]

Yes, The Viewer use Threejs.
The saved file 'ifcquery.min.js' is writed by Three.js, but it is encoded.

[rhairston]

I can confirm that ifc is used in ConSci. I actually used an ifc converter app to convert my companies files into .objs with .mtl files and they read really well. So taking out the middle man would be really helpful since our customers tend to upload ifc files anyway

[RicoLiu]

@rhairston An ifc converter app?It can convert ifc file into obj file so that Threejs can load it well.
Am I right?

here is an ifc converter app?

[mrdoob]

Thanks everyone for chiming in!

@kdilayer a PR would be great. Please, include ThreeCSG too 😊

[cmeeren]

Any progress here? We're currently converting IFC to DAE for use with three.js, and would love it if three.js supported IFC directly.

[remitache]

Hi kdilayer,

I am very interested into having a look and taking it further.

[Servuc]

Hi everybody,

I've seen that too https://www.npmjs.com/package/ifc-convert
With that you can convert IFC to DAE, OBJ, STP and IGS.

[AlexanderChen1989]

@kdilayer Any progress ?