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From Serge Lages, "Here are some modifications to the DatabasePager, with the possibility to :

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- Get or set the target number of PagedLOD children to remove per frame.
- Get or set the minimum number of inactive PagedLOD to keep.

Corresponding environment variables have been added too.
The default values reproduce the previous DatabasePager behavior."
This commit is contained in:
Robert Osfield
2007-12-06 17:31:00 +00:00
parent 6c09a22957
commit b7881943d4
2 changed files with 29 additions and 3 deletions
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19
src/osgDB/DatabasePager.cpp
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@@ -25,6 +25,8 @@ static osg::ApplicationUsageProxy DatabasePager_e1(osg::ApplicationUsage::ENVIRO
static osg::ApplicationUsageProxy DatabasePager_e2(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_MAXIMUM_OBJECTS_TO_COMPILE_PER_FRAME <int>","maximum number of OpenGL objects to compile per frame in database pager.");
static osg::ApplicationUsageProxy DatabasePager_e3(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_DATABASE_PAGER_DRAWABLE <mode>","Set the drawable policy for setting of loaded drawable to specified type. mode can be one of DoNotModify, DisplayList, VBO or VertexArrays>.");
static osg::ApplicationUsageProxy DatabasePager_e4(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_DATABASE_PAGER_PRIORITY <mode>", "Set the thread priority to DEFAULT, MIN, LOW, NOMINAL, HIGH or MAX.");
static osg::ApplicationUsageProxy DatabasePager_e5(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_DATABASE_PAGER_CHILDREN_TO_REMOVE_PER_FRAME <int>", "Set the maximum number of PagedLOD child to remove per frame.");
static osg::ApplicationUsageProxy DatabasePager_e6(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE,"OSG_DATABASE_PAGER_MINIMUM_INACTIVE_PAGEDLOD <int>", "Set the minimum number of inactive PagedLOD child to keep.");
DatabasePager::DatabasePager()
{
@@ -134,6 +136,16 @@ DatabasePager::DatabasePager()
_maximumNumOfObjectsToCompilePerFrame = atoi(ptr);
}
_maximumNumOfRemovedChildPagedLODs = 1;
if( (ptr = getenv("OSG_DATABASE_PAGER_CHILDREN_TO_REMOVE_PER_FRAME")) != 0)
{
_maximumNumOfRemovedChildPagedLODs = atoi(ptr);
}
_minimumNumOfInactivePagedLODs = 100;
if( (ptr = getenv("OSG_DATABASE_PAGER_MINIMUM_INACTIVE_PAGEDLOD")) != 0)
{
_minimumNumOfInactivePagedLODs = atoi(ptr);
}
// initialize the stats variables
resetStats();
@@ -174,6 +186,8 @@ DatabasePager::DatabasePager(const DatabasePager& rhs)
_targetFrameRate = rhs._targetFrameRate;
_minimumTimeAvailableForGLCompileAndDeletePerFrame = rhs._minimumTimeAvailableForGLCompileAndDeletePerFrame;
_maximumNumOfObjectsToCompilePerFrame = rhs._maximumNumOfObjectsToCompilePerFrame;
_maximumNumOfRemovedChildPagedLODs = rhs._maximumNumOfRemovedChildPagedLODs;
_minimumNumOfInactivePagedLODs = rhs._minimumNumOfInactivePagedLODs;
// initialize the stats variables
resetStats();
@@ -833,11 +847,10 @@ void DatabasePager::removeExpiredSubgraphs(double currentFrameTime)
unsigned int i = 0;
// unsigned int numberOfPagedLODToTest = _inactivePagedLODList.size();
unsigned int targetNumOfInActivePagedLODs = 100;
unsigned int targetNumOfRemovedChildPagedLODs = 0;
if (_inactivePagedLODList.size()>targetNumOfInActivePagedLODs) targetNumOfRemovedChildPagedLODs = _inactivePagedLODList.size()-targetNumOfInActivePagedLODs;
if (_inactivePagedLODList.size() > _minimumNumOfInactivePagedLODs) targetNumOfRemovedChildPagedLODs = _inactivePagedLODList.size() - _minimumNumOfInactivePagedLODs;
if (targetNumOfRemovedChildPagedLODs>1) targetNumOfRemovedChildPagedLODs=1;
if (targetNumOfRemovedChildPagedLODs > _maximumNumOfRemovedChildPagedLODs) targetNumOfRemovedChildPagedLODs = _maximumNumOfRemovedChildPagedLODs;
// filter out singly referenced PagedLOD and move reactivated PagedLOD into the active list