Rayfront 1.0 User Manual

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Editing Luminaire Descriptions

On this page, you can edit luminaire definitions that have already been imported to the project.

Luminaire Selection

Luminaires in Project:
This list displays all luminaires available in the current project.

Save Changes
If you have modified any of the luminaire properties on this page, then this button will become active, so that you can save your edits.

Luminaire Details:
This list shows all the details that Rayfront could find about the currently selected luminaire when importing it from the original file. This includes information that is not actually used, but is included for informational purposes.

[Luminaire Editing Dialog]

Edit Luminaire Properties

The lower part of the page is activated when a luminaire in one of the lists above is selected, and displays the most important properties of that luminaire.

Luminous Area:
The shape of the luminaire (actually the luminous opening) in plan view. This gives you quick visual feedback to see what kind of luminaire you have selected, eg. if it has a circular or a longitudinal shape.

cd/1000 lm:
A simple graphical display of the output distribution of the selected luminaire.

Fixture Geometry:
Select a definition of the luminaire geometry that has previously been imported. The default is "--No Geometry--", which will result in only the luminous surfaces of the luminaire description being used.
Import Geometry...
Import the geometry description of a luminaire. This can be a self contained Radiance scene file, or a frozen octree file. The file must not reference any external information, or simulations will fail. After importing, each geometry description can be used for any luminaire definition, by selecting it as "Fixture Geometry" as above.

Maintenance Factor:
A reduction factor that is usually applied to take real world degradation of luminaires into account. The most often used value is 0.8, which is also the default.

Horizontal Anchor:
Vertical Anchor:
Those two selections define how the luminaire description will be positioned in the scene, relative to the anchor point defined by the triangular polygon the luminaire replaces. The selections refer to the extents of the bounding box of the luminaire case size as defined in the original luminaire file, or to the luminous size if no case size is given.

The front of the luminaire is defined as the X direction of the luminaire description. This is the C0-plane of the light output distribution, which Rayfront defines as the longer direction of the luminaire, or the original C0-plane of the imported file for circular or square luminaires.

Luminous Shape:
Here you can chose to use luminous surfaces that represent the actual luminaire openings as defined in the original file, or an impostor geometry. The impostor geometry is invisible to the eye, but serves as the actual light source in the simulation. It must always be larger than the actual luminaire, to avoid being shadowed by it. You can select from a box, a sphere, and a vertical cylinder (relative to the luminaire definition).

The actual size of the impostor geometry, if one is selected. The availability of each dimension entry depens on the geometry type selected. The default values are taken from the case size of the original luminaire description, which may sometimes result in values that are too small. Just increase each value until the background of the entry field isn't displayed in red anymore in this case.


Done - Close the dialog.

Help... - display this information.


User Manual Overview
     The Simulation Control Center
         Menu Items
             Importing Luminaire Data

Luminaire Database
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