void DiInstanceManager::DefragmentBatches(bool optimizeCull, DiVector<DiInstancedModelPtr> &usedEntities,
InstanceBatchVec &fragmentedBatches)
{
auto itor = fragmentedBatches.begin();
auto end = fragmentedBatches.end();
while( itor != end && !usedEntities.empty() )
{
if( !(*itor)->IsStatic() )
{
(*itor)->DefragmentBatch( optimizeCull, usedEntities );
}
++itor;
}
InstanceBatchVec::iterator lastImportantBatch = itor;
while( itor != end )
{
if( !(*itor)->IsStatic() )
{
(*itor)->DefragmentBatchDiscard();
itor->reset();
}
else
{
*lastImportantBatch++ = *itor;
}
++itor;
}
const size_t remainingBatches = end - lastImportantBatch;
fragmentedBatches.resize( fragmentedBatches.size() - remainingBatches );
}
//-----------------------------------------------------------------------
void InstanceManager::defragmentBatches( bool optimizeCull,
InstanceBatch::InstancedEntityVec &usedEntities,
InstanceBatch::CustomParamsVec &usedParams,
InstanceBatchVec &fragmentedBatches )
{
InstanceBatchVec::iterator itor = fragmentedBatches.begin();
InstanceBatchVec::iterator end = fragmentedBatches.end();
while( itor != end && !usedEntities.empty() )
{
if( !(*itor)->isStatic() )
(*itor)->_defragmentBatch( optimizeCull, usedEntities, usedParams );
++itor;
}
InstanceBatchVec::iterator lastImportantBatch = itor;
while( itor != end )
{
if( !(*itor)->isStatic() )
{
//If we get here, this means we hit remaining batches which will be unused.
//Destroy them
//Call this to avoid freeing InstancedEntities that were just reparented
(*itor)->_defragmentBatchDiscard();
OGRE_DELETE *itor;
}
else
{
//This isn't a meaningless batch, move it forward so it doesn't get wipe
//when we resize the container (faster than removing element by element)
*lastImportantBatch++ = *itor;
}
++itor;
}
//Remove remaining batches all at once from the vector
const size_t remainingBatches = end - lastImportantBatch;
fragmentedBatches.resize( fragmentedBatches.size() - remainingBatches );
}