Visualizing a LPF Result for Multi-Sensors Analysis

The Light Expert allows you to specify what ray path to display in 3D view according to required or rejected faces you select and the measures defined in each xmp map.

Note: If you need more information, see Light Expert.

To visualize a LPF Result for a multi sensor analysis:

From Speos tree, double-click the *.lpf file.

Virtual Photometric Lab loads each XMP result of each sensor contained in the Light Expert Group with the first measure area available in the Measures tool on the first opening. The selected measure area (in the Measure tool) upon save is displayed on the next openings. Light Expert panel is displayed.
Note: If necessary, you can hide the XMP results of the 3D view for a better display of the *.lpf ray tracing.
From the Faces filtering drop-down list:
- Select And to display rays that have at least one intersection with each selected faces.
- Select Or to display rays that have at least one intersection with one of the selected faces.
Define the Ray number to be displayed in the 3D view.
In Ray length, set a value to define the ray length preview.

In Virtual Photometric Lab, click Measure.



Extended map	Extended map with surface tool

If necessary, modify the measure area, shape or position on the maps to update the ray tracing preview in the 3D view.
The ray tracing of the 3D view is adjusted in real-time to illustrate the light path from the sources to the sensors.
Select the rays passing:
- Inside all measurement areas: only the rays passing through all of the measurement areas you defined are displayed in the 3D view.
- Outside at least one measurement area: rays passing outside of at least one measurement area are displayed in the 3D view.
  That means a ray is displayed if he passes outside of one measurement area but passes through all other measurement area. However you don't know outside which measurement areas the ray passes.
If you want to filter the rays displayed in the 3D view:
- Click and select the Required faces (the faces that are taken into account to filter rays).
  The rays impacting the required faces and reaching the sensor are displayed in the 3D view.
- Click and select the Rejected faces (the faces that you want to exclude from the light trajectory).
  The rays reaching the sensor, excepted those impacting the rejected faces are displayed in the 3D view.
If you want to better visualize rays paths:
1. Click Section mode .
  The Section mode appears in the 3D view and you can move it thanks to the 3D Manipulator to modify its position and orientation therefore cutting the geometry and see the rays paths.
2. If the 3D Manipulator is not enough discernible, in the Section mode section, with the Rotation handles distance from center parameter you can modify the distance of the rotation manipulators to the center of the 3D Manipulator.
In the Photometric section, if you want to display only the photometric contribution of the rays displayed in the 3D view, check Filtered Rays Only, then click Update Results to recalculate the photometric values of all XMP maps from the Light Expert Group.
Note: Selecting a layer in one of the XMP maps applies the layer to all XMP maps. That implies that sequences are not sorted in descending order of energy from the second sensor of the group. For more information on how the sequences are ordered, refer to the section XMP Map of Sensors Included in Sensors' Group.

The optical system (figure 1) displays the rays passing through the area defined in the sensor 1 result (figure 2) and the area defined in the sensor 2 result (figure 3) and the area defined in the sensor 3 result (figure 4).