User's Manual

162
Chapter 14: Optimizing Rendering
The camera may disregard range values and
• Display an already-fetched level of detail while a higher level of detail is
downloaded from disk.
• Adjust the level of detail displayed to maintain a constant frame rate; this is always
the case if you leave the range() field empty.
• Disregard the range values for any other implementation-dependent reason.
Tip: For best results, specify ranges only where necessary; give browsers as much
freedom as possible to choose levels of detail based on performance.
Transitioning Between Levels of Detail
The transition() method specifies the range over which one csLOD child changes into
the next, as shown in Figure 14-5.
Figure 14-5 csLOD Ranges
High resolution image
Low resolution image
Transition region
Range 1
Range 2