Re: [EnergyPlus_Support] Surface Vertices

[Linda Lawrie <linda@xxxxxxxxxx>]

At 01:33 AM 10/9/2002,
alexander.beisteiner@xxxxxxxxxxxxxxxxxx wrote:
> Dear Sir/Madam
> Following the convention in the object SurfaceGeometry from which side
> have the surfaces to be faced- inside or outside?
> Further, what about floor and ceiling?

Page 81 of the IOReference States (Vertex Entry):

Field: VertexEntry

Surfaces are always specified as being viewed from the outside of the zone to which they belong.  (Shading surfaces are specified slightly differently and are discussed under the particular types).  EnergyPlus needs to know whether the surfaces are being specified in counterclockwise or clockwise order (from the SurfaceStartingPosition).  EnergyPlus uses this to determine the outward facing normal for the surface (which is the facing angle of the surface  very important in shading and shadowing calculations.

Surfaces are always specified from the "outside" of the surface.

Linda

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