//-----------------------------------------------------------------------
void PagingLandScapePageManager::queuePageNeighbors()
{
// Queue the rest
// Loading must be done one by one to avoid FPS drop, so they are queued.
// We must load the next visible LandScape pages,
// check the LandScape boundaries
for (unsigned int i = mCurrentcam->mPreIniX; i <= mCurrentcam->mPreFinX; i++) {
for (unsigned int j = mCurrentcam->mPreIniZ; j <= mCurrentcam->mPreFinZ; j++) {
// pages in this zone around camera, must be at
// least preloading. that means they can be
// loaded too.
PagingLandScapePage* p = getPage(i, j, true);
if (!(p->isInLoadQueue() || p->isLoaded())) {
if ((j >= mCurrentcam->mIniZ) && (j <= mCurrentcam->mFinZ) && (i >= mCurrentcam->mIniX) && (i <= mCurrentcam->mFinX)) {
// pages in this tighter zone
// around camera must be Loading
// or Loaded as they may be
// below camera very soon.
removeFromQueues(p);
mPageLoadQueue.push(p);
p->setInQueue(PagingLandScapePage::QUEUE_LOAD);
} else {
// must be at least preloading
p->preloadInBackground();
}
}
p->touch();
}
}
}
//-----------------------------------------------------------------------
void PagingLandScapePageManager::processUnloadQueues()
{
// Check for pages that need to be unloaded.
// if touched, that means they didn't have been touch by any cameras
// for several frames and thus need to be unloaded.
// LIST CHECKS
for (PagingLandScapePageList::iterator itl = mLoadedPages.begin(); itl != mLoadedPages.end();) {
if ((*itl)->unloadUntouched()) {
releasePage(*itl);
itl = mLoadedPages.erase(itl);
} else {
++itl;
}
}
// QUEUES CHECKS
// check queues for page that need to be excluded from queues
PagingLandScapePage* p = 0;
for (PagingLandScapeQueue<PagingLandScapePage>::MsgQueType::iterator itq = mPageLoadQueue.begin(); itq != mPageLoadQueue.end();) {
assert(!(*itq)->isLoaded());
assert((*itq)->isInLoadQueue());
if ((*itq)->unloadUntouched()) {
p = *itq;
// remove from queue
p->setInQueue(PagingLandScapePage::QUEUE_NONE);
itq = mPageLoadQueue.erase(itq);
// remove from active pages
//(must be removed from queue first)
releasePage(p);
} else {
++itq;
}
}
}
//-----------------------------------------------------------------------
void PagingLandScapePageManager::LoadFirstPage(PagingLandScapeCamera* cam)
{
const Vector3 CamPos = cam->getDerivedPosition();
//gets page indices (if outside Terrain gets nearest page)
unsigned int i, j;
getPageIndices(CamPos.x, CamPos.z, i, j, true);
// update the camera page position
// does modify mIniX, mFinX, mIniZ, mFinZ
PagingLandScapePage* p = getPage(i, j, false);
if (p) {
mPageLoadQueue.push(p);
p->setInQueue(PagingLandScapePage::QUEUE_LOAD);
}
}
