No description
cc3d0221ea
paging system much more robust when position change is very rapid and sporadic. Recall that we must load 3d models in the main render thread because model loading can trigger opengl calls (i.e. with texture loading) and all opengl calls *must* happen in the main render thread. To accomplish this we load the base tile in the pager thread and build a work queue of external models that need to be loaded. We never allow a tile to be paged out of the tile cache until all it's pending model loads are complete. However, when changing position very rapidly, we can quickly create a huge backlog of pending model loads because we are changing positions faster than we can load the associated models for the existing tiles. The end result is that tiles that are long out of range can't be removed because there is still a huge backlog of pending model load requests and memory blows up. This change being committed allows the tile paging system to remove tiles if they are out of range, even when there are pending models to load. The model loading code in the render thread can now check to see if the tile exists and discard any model load request for tiles that no longer exist. This situation should never occur in normal operation, but could occur in "contrived" situations where an external script was rapidly changing the simulator position to then be able to query FG terrain height, and doing this for a large number of points that are distributed across a large area. |
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| docs-mini | ||
| examples/netfdm | ||
| man | ||
| package | ||
| scripts | ||
| src | ||
| tests | ||
| utils | ||
| .cvsignore | ||
| acinclude.m4 | ||
| am2dsp.cfg | ||
| AUTHORS | ||
| autogen.sh | ||
| ChangeLog | ||
| configure.ac | ||
| FlightGear.dsp | ||
| FlightGear.dsw | ||
| Makefile.am | ||
| NEWS | ||
| README | ||
| Thanks | ||
Welcome to the FlightGear Flight Simulator project. =================================================== The primary web page for this project is: http://www.flightgear.org For basic installation instructions see the "INSTALL" file. Before you can run FlightGear you will also need to download and install the "base" package which is a collection of textures, sounds, sample scenery, and other data files need by the sim. For additional install help for specific platforms please browse the "docs-mini/" subdirectory. More complete documentation is available from our web page as a separate distribution. Please take a look at the "Thanks" file for a list of people who have contributed to this project. If you have contributed something but don't find your name in this file. Please send a polite reminder to curt@flightgear.org For a summary of changes/additions by version see the "NEWS" file. This project is GPL'd. For complete details on our licensing please see the "COPYING" file. For information on available mailing lists, mailing list archives, and other available source code and documenation, please visit our web site. FlightGear is a product of the collaboration of large international group of volunteers. FlightGear is a work in progress. FlightGear comes with no warrantee. We hope you enjoy FlightGear and/or find it of some value!