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Having attributes be formulas in IFC
This is probably blasphemous to the IFC gods, but it seems like it would be very helpful to have techniques like the following in IFC.
- #148= IFCBUILDINGSTOREY('2Xg7c1A415nR_KbA9qpXi$',#42,'Level 1',$,'Level:Story Level',#146,$,'Level 1',.ELEMENT.,0.);
- #154= IFCBUILDINGSTOREY('2Xg7c1A415nR_KbA9qp4ns',#42,'Level 2',$,'Level:Story Level',#153,$,'Level 2',.ELEMENT.,12.);
- #219= IFCWALLSTANDARDCASE('3aOFpwRCn36Pv_D8U$GBBQ',#42,'Basic Wall:Testy Wall Type:153022',$,'Basic Wall:Testy Wall Type',#183,#213,'153022');
- #213= IFCPRODUCTDEFINITIONSHAPE($,$,(#188,#210));
- #210= IFCSHAPEREPRESENTATION(#125,'Body','SweptSolid',(#200));
- #200= IFCEXTRUDEDAREASOLID(#198,#199,#20,#154.elevation - #148.elevation);
- #198= IFCRECTANGLEPROFILEDEF(.AREA.,$,#197,5.25,0.5);
- #200= IFCEXTRUDEDAREASOLID(#198,#199,#20,#154.elevation - #148.elevation);
- #210= IFCSHAPEREPRESENTATION(#125,'Body','SweptSolid',(#200));
- #213= IFCPRODUCTDEFINITIONSHAPE($,$,(#188,#210));
- #219= IFCWALLSTANDARDCASE('3aOFpwRCn36Pv_D8U$GBBQ',#42,'Basic Wall:Testy Wall Type:153022',$,'Basic Wall:Testy Wall Type',#183,#213,'153022');
In this instance, the importing application could retain the height of the wall as a function of the difference between the 2nd and 1st floor elevations, which in this case equals 12ft (or meters, if that's the unit in the IFC file)
A small step to parameterizing IFC?
