Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
Order them counter-clockwise. For consistency with the default, start at the upper left corner.
The Online help for GlobalGeometry Rules tells us that the shadowing algirthms require the vertices 'in a certain order and positional structure' and goes on to say Surfaces are always 'viewed from the outside of the zone'
The Engineering Reference includes the key detail: 'listed counter-clockwise'. All of this can be summarised as 'use the right hand rule'.
| | 2 | No.2 Revision |
Order them counter-clockwise. For consistency with the default, start at the upper left corner.
The Online help for GlobalGeometry Rules tells us that the shadowing algirthms algorithms require the vertices 'in a certain order and positional structure' and goes on to say Surfaces are always 'viewed from the outside of the zone'
The Engineering Reference includes the key detail: 'listed counter-clockwise'. All of this can be summarised as 'use the right hand rule'.
| | 3 | No.3 Revision |
Order them counter-clockwise. For consistency with the default, start at the upper left corner.corner.
The upper left corner for a horizontal surface is underdefined.
The Online help for GlobalGeometry Rules tells us that the shadowing algorithms require the vertices 'in a certain order and positional structure' and goes on to say Surfaces are always 'viewed from the outside of the zone'
The Engineering Reference includes the key detail: 'listed counter-clockwise'. All of this can be summarised as 'use the right hand rule'. There is some missing info for horizontal surfaces.
