Class Name: Distance Level of Detail Data

Superclass - Level of Detail Data

Definition

Level of detail described in terms of distance from the eyepoint to the center of the object.

Primary Page in DRM Diagram:

• 9

Example

1. A Level of Detail Related Geometry object contains two components (each having an attached Distance Level of Detail Data).

   The first Distance Level of Detail Data object has:

   • minimum_range = 100
   • minimum_fade_band = 10
   • maximum_range = 200
   • maximum_fade_band = 20

   The second Distance Level of Detail Data object has:

   • minimum_range = 200
   • minimum_fade_band = 10
   • maximum_range = 1000
   • maximum_fade_band = 10

   If we are moving outward and the distance reaches 90, the first object starts fading in. At a distance of 100, the first object has totally faded in. At a distance of 180 the first object starts to fade out. At a distance of 190 the second object starts fading in. The first and second objects are both seen (super-imposed) between the ranges of 190 and 200. At a distance of 200 the first object is totally faded out, while the second object is the only object seen. At a distance of 990, the second object starts fading out, and at 1000 it is completely faded out.

2. A Level of Detail Related Geometry object contains two components (each having an attached Distance Level of Detail Data).

   The first Distance Level of Detail Data object has:

   • minimum_range = 50
   • minimum_fade_band = 20
   • maximum_range = 100
   • maximum_fade_band = 30

   The second Distance Level of Detail Data object has:

   • minimum_range = 110
   • minimum_fade_band = 15
   • maximum_range = 500
   • maximum_fade_band = 10

   If we are moving outward and the distance reaches 30, the first object starts fading in. At a distance of 50, the first object has totally faded in. At a distance of 70 the first object starts to fade out. At a distance of 95 the second object starts fading in. The first and second objects are both seen (super-imposed) between the ranges of 95 and 100. At a distance of 100, the first object is totally faded out, while the second object is the only object seen, but hasn't completely faded in. At a distance of 110 the second object has completely faded in. At a distance of 490 the second object starts fading out, and at 500 is completely faded out.

   Note: If a target does not contain fade bands, then the minimum_fade_band and maximum_fade_band would be set to 0.

FAQs

Constraints

Composed of (one-way)

• optionally, a Location (notes)

Component of (one-way)(inherited)

• one or more Base Level of Detail Data

Field Elements

Notes

Composed of Notes

Location

 the center point for the LOD test

Fields Notes

minimum_range

 in meters

minimum_fade_band

 expressed in meters (not percent). This fade band must go in the
 negative direction from the minimum range.

maximum_range

 in meters;
 SE_POSITIVE_INFINITY is a legal range value

maximum_fade_band

 expressed in meters (not percent). This fade band must go in the
 negative direction from the maximum range.