====== Skins ======

===== Definition =====

''Skins'' are sets of [[doc:user:geometry:user:faces|Sides]]. A ''Skin'' can be open or closed.

  skin = skinset.add( Skin(number, [side1, side2, side3, ...]) )

where

| ''number''                         | number of the ''Skin''                     | 
| ''side1'', ''side2'', ''side3''    | ''[[doc:user:geometry:user:faces|Sides]]'' which constitute the ''Skin'' | 


===== Notes =====

  * ''Skin'' can be replaced by ''MultiProjSkin'' (derived class). ''MultiProjWire'' can handle multiple projections when the normal is not continuous
  * The function ''skinset.add'' can take up to ten ''Skins'' in argument. If only one is supplied, the function ''add'' returns a reference pointing towards this skin. If more than one are supplied, no reference is returned. 
  * If the ''Skin'' is to be meshed by the transfinite mesher [[doc:user:geometry:mesh:3d]]), the order of the faces that define it matters.