On Thursday, December 13, 2012 15:04:16 Renk Thorsten wrote: > > Somewhat related to the above - *if* the radio propagation model could be > shown to be more realistic - what framerate loss would this be worth as > compared to a faster, less realistic model? And does this question matter > at all if this is implemented optionally - should not the user decide > this? >
Hi Thorsten, Torsten, all, Regarding the performance, you are correct, the user can decide on what to spend the CPU cycles. But for the sake of documenting this issue, I have performed a test: The test is performed in standard condition: on ground, all terrain finished loading, visibility set to 40 miles, LOD range bare 60000 meters, 3 stations tuned, each at limit of loaded terrain, approx 100 km medium distance to them. First image shows subsystem enabled, second shows subsystem disabled. I have highlighted with red the relevant areas in the images. As always, click for details. http://wiki.flightgear.org/File:Radio-perf7b.png Radio subsystem enabled. http://wiki.flightgear.org/File:Radio-perf9b.png Radio subsystem disabled. Notice DME indication has appeared. In both cases, the FPS observed was 39. In long flight tests, the FPS difference is more like 3-5 from disabled to enabled. Now, regarding terrain influence, modes of propagation, and clutter influence on diffraction at different frequencies, you can observe the details on the upper left of the images. I won't get into details anymore, because I have done that already in a couple of messages. If anyone wishes to add more information on the subject of performance, I invite you to use the wiki page: http://wiki.flightgear.org/Talk:Radio_propagation I'm open to any other technical questions regarding the radio propagation algorithms used. Cheers, Adrian ------------------------------------------------------------------------------ LogMeIn Rescue: Anywhere, Anytime Remote support for IT. Free Trial Remotely access PCs and mobile devices and provide instant support Improve your efficiency, and focus on delivering more value-add services Discover what IT Professionals Know. Rescue delivers http://p.sf.net/sfu/logmein_12329d2d _______________________________________________ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
