FGFS-4.1/simgear
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Fix PagedLOD for random objects.

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- Only generate the object set and flights from the data once.
- Only expire the PagedLOD node after a suitable period of time.
This commit is contained in:
Stuart Buchanan 2014-11-28 21:57:37 +00:00
parent 9537876bba
commit 9da0031039
1 changed files with 33 additions and 6 deletions
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39
simgear/scene/tgdb/obj.cxx
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@ -40,6 +40,7 @@
#include <osg/Referenced>
#include <osg/StateSet>
#include <osg/Switch>
#include <osgDB/ReaderWriter>
#include <osgUtil/Simplifier>
@ -79,6 +80,7 @@
#define SG_SIMPLIFIER_MAX_ERROR 2000.0
#define SG_OBJECT_RANGE 9000.0
#define SG_TILE_RADIUS 14000.0
#define SG_TILE_MIN_EXPIRY 180.0
using namespace simgear;
@ -102,6 +104,13 @@ public:
SGDirectionalLightListBin reilLights;
SGMatModelBin randomModels;
SGBuildingBinList randomBuildings;
bool tileRandomSurfaceLightsComputed;
bool tileRandomObjectsComputed;
SGTileGeometryBin() {
tileRandomSurfaceLightsComputed = false;
tileRandomObjectsComputed = false;
}
static SGVec4f
getMaterialLightColor(const SGMaterial* material)
@ -480,6 +489,12 @@ public:
{
SGMaterialTriangleMap::iterator i;
// Only compute the lights if we haven't already done so.
// For example, the light data will still exist if the
// PagedLOD expires.
if (tileRandomSurfaceLightsComputed) return;
tileRandomSurfaceLightsComputed = true;
// generate a repeatable random seed
mt seed;
mt_init(&seed, unsigned(123));
@ -536,6 +551,10 @@ public:
{
SGMaterialTriangleMap::iterator i;
// Only compute the random objects if we haven't already done so
if (tileRandomObjectsComputed) return;
tileRandomObjectsComputed = true;
// generate a repeatable random seed
mt seed;
mt_init(&seed, unsigned(123));
@ -1326,6 +1345,7 @@ SGLoadBTG(const std::string& path, const simgear::SGReaderWriterOptions* options
double maxLength = SG_SIMPLIFIER_MAX_LENGTH;
double maxError = SG_SIMPLIFIER_MAX_ERROR;
double object_range = SG_OBJECT_RANGE;
double tile_min_expiry = SG_TILE_MIN_EXPIRY;
if (options) {
matlib = options->getMaterialLib();
@ -1339,7 +1359,8 @@ SGLoadBTG(const std::string& path, const simgear::SGReaderWriterOptions* options
ratio = propertyNode->getDoubleValue("/sim/rendering/terrain/simplifier/ratio", ratio);
maxLength = propertyNode->getDoubleValue("/sim/rendering/terrain/simplifier/max-length", maxLength);
maxError = propertyNode->getDoubleValue("/sim/rendering/terrain/simplifier/max-error", maxError);
object_range = propertyNode->getDoubleValue("/sim/rendering/static-lod/rough", object_range);
object_range = propertyNode->getDoubleValue("/sim/rendering/static-lod/rough", object_range);
tile_min_expiry= propertyNode->getDoubleValue("/sim/rendering/plod-minimum-expiry-time-secs", tile_min_expiry);
}
SGVec3d center = tile.get_gbs_center();
@ -1361,7 +1382,7 @@ SGLoadBTG(const std::string& path, const simgear::SGReaderWriterOptions* options
normals[i] = hlOrf.transform(normals[i]);
tile.set_normals(normals);
osg::ref_ptr<SGTileGeometryBin> tileGeometryBin = new SGTileGeometryBin;
osg::ref_ptr<SGTileGeometryBin> tileGeometryBin = new SGTileGeometryBin();
if (!tileGeometryBin->insertBinObj(tile, matcache))
return NULL;
@ -1399,19 +1420,25 @@ SGLoadBTG(const std::string& path, const simgear::SGReaderWriterOptions* options
}
}
osg::ref_ptr<SGReaderWriterOptions> opt;
opt = SGReaderWriterOptions::copyOrCreate(options);
// we just need to know about the read file callback that itself holds the data
osg::ref_ptr<RandomObjectCallback> randomObjectCallback = new RandomObjectCallback;
randomObjectCallback->_options = SGReaderWriterOptions::copyOrCreate(options);
RandomObjectCallback* randomObjectCallback = new RandomObjectCallback;
randomObjectCallback->_options = opt;
randomObjectCallback->_tileGeometryBin = tileGeometryBin;
randomObjectCallback->_path = std::string(path);
randomObjectCallback->_loadterrain = ! (simplifyNear == simplifyDistant);
randomObjectCallback->_matcache = matcache;
osg::ref_ptr<osgDB::Options> callbackOptions = new osgDB::Options;
callbackOptions->setReadFileCallback(randomObjectCallback.get());
callbackOptions->setObjectCacheHint(osgDB::Options::CACHE_ALL);
callbackOptions->setReadFileCallback(randomObjectCallback);
pagedLOD->setDatabaseOptions(callbackOptions.get());
pagedLOD->setFileName(pagedLOD->getNumChildren(), "Dummy name - use the stored data in the read file callback");
// Ensure that the random objects aren't expired too quickly
pagedLOD->setMinimumExpiryTime(pagedLOD->getNumChildren(), tile_min_expiry);
pagedLOD->setFileName(pagedLOD->getNumChildren(), "Dummy filename for random objects callback");
pagedLOD->setRange(pagedLOD->getNumChildren(), 0, object_range + SG_TILE_RADIUS);
transform->addChild(pagedLOD);
transform->setNodeMask( ~simgear::MODELLIGHT_BIT );