Grasshopper

algorithmic modeling for Rhino

why UndergroundSlab HBSrf is recognized as groundFloors?

In the attached GH file, a HBSrf is created as UndergroundSlab using the createHBSrfs component.

However, it is recognized as a groundFloors surface rather than a undergroundSlabs surface using the Decompose Based on Type component.

May I ask why it is like this? What is the difference between groundFloors and undergroundSlabs surfaces?

Thanks!

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Permalink Reply by Mostapha Sadeghipour Roudsari on July 9, 2015 at 4:17am

By definition undergroundSlab is a roof which is underground. A floor which touches the ground is a groundFloor

Permalink Reply by Grasshope on July 9, 2015 at 9:30am

Thanks, Mostapha!

But I don't quite understand what a "underground roof" is.

Is it a roof surface (with a normal pointing upward) whose centroid Z coordinate is smaller/"lower" than that for other "ground touching" floor surface, i.e. a "groundFloors" surface?

Permalink Reply by Mostapha Sadeghipour Roudsari on July 11, 2015 at 8:01am

True! If yyou

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