5 Construc n )old ects
) are an important component of lighting system analysis.
(or other more complex obstructions like
modular furniture shown at right) can all have a dramatic impact on lighting system
performance and it is frequently important to model these features to then take
them into account in the calculation.
In Visual, such items are comprised of one or more
in the form of
can be constructed in a pre-grouped fashion as Rooms and Structures.
with a coplanar front and back having the same properties. There is no need to create extra surfaces to have a correct model, as is the case in some other
lighting software. A common wall can be created between two rooms without impacting the average noticeably in most cases if it is convenient. For example, a 60x40 room versus a 61x41
room will have 1% difference in average illuminance with the same lighting system, which is inside the 2% standard photometric test error. Imported CAD files almost always contain both
sides of a given wall, and when an enclosed
is created, Visual's algorithms calculate succinctly so the seeming duplication is not a detriment. See Rooms
are created with a
to discern the front face from the
back face. This is stored in the object
and accessed with the
is a unit vector indicating direction.
(0,0,1) indicates the positive-Z direction. (0,1,0) indicates the positive-Y direction.
(1,0,0) indicates the positive-X direction.
is important in that Visual uses that information (which side
is the front side) when for example a
is placed on a
Calculation Zones on Existing Solid Objects
can be "
" by modifying object
can be converted to
objects if necessary. See Convert
. (Note that the resulting
objects will have a