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WS30: Terrasync compatible files, LoD control

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Change WS30 file format to match standard scenery directory
structure, add controls for LOD ranges.
This commit is contained in:
Stuart Buchanan 2021-02-02 15:15:18 +00:00
parent 23a4fb1429
commit bbef23deae
5 changed files with 93 additions and 88 deletions
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19
simgear/bucket/newbucket.cxx
View File

@ -197,10 +197,9 @@ std::string SGBucket::gen_vpb_base() const {
}
top_lon *= 10;
if ( top_lon >= 0 ) {
hem = 'E';
}
else {
hem = 'W';
hem = 'e';
} else {
hem = 'w';
top_lon *= -1;
}
if ( main_lon < 0 ) {
@ -214,17 +213,19 @@ std::string SGBucket::gen_vpb_base() const {
}
top_lat *= 10;
if ( top_lat >= 0 ) {
pole = 'N';
}
else {
pole = 'S';
pole = 'n';
} else {
pole = 's';
top_lat *= -1;
}
if ( main_lat < 0 ) {
main_lat *= -1;
}
::snprintf(raw_path, 256, "WS_%c%d%c%2d", hem, main_lon, pole, main_lat);
::snprintf(raw_path, 256, "%c%03d%c%02d/%c%03d%c%02d/ws_%c%03d%c%02d",
hem, top_lon, pole, top_lat,
hem, main_lon, pole, main_lat,
hem, main_lon, pole, main_lat);
return raw_path;
}

49
simgear/scene/model/ModelRegistry.cxx
View File

@ -937,6 +937,40 @@ public:
}
};
class AdjustLODVisitor : public osg::NodeVisitor
{
public:
float _rangeFactor;
float _maxRange;
AdjustLODVisitor(float rangeFactor, float maxRange): osg::NodeVisitor(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN)
{
_rangeFactor = rangeFactor;
_maxRange = maxRange;
}
void apply(osg::PagedLOD& node)
{
if (node.getNumChildren() == 0) return;
if (node.getNumFileNames() == 2) {
// We use internal knowledge of VPB to modify the LOD ranges.
// The first child is the current node. The second is the sub-tile at higher resolution.
// See VirtualPlanetBuild src/vpb/Destination.cpp CompositeDestination::createPagedLODScene()
// lines 3330-3333
node.dirtyBound(); // At this point the bounds haven't been calculated, so we need to force this.
float maxRange = _maxRange + node.getBound().radius();
float cutoff = std::min(node.getBound().radius() * _rangeFactor, maxRange);
SG_LOG(SG_TERRAIN, SG_DEBUG, "VPB PagedLOD range " << cutoff << " " << maxRange);
node.setRange(0, cutoff, maxRange);
node.setRange(1, 0, cutoff);
} else {
SG_LOG(SG_TERRAIN, SG_ALERT, "Unexpected PagedLOD type in LOD range update");
}
traverse(node);
}
};
struct OSGOptimizePolicy : public OptimizeModelPolicy {
@ -950,27 +984,34 @@ struct OSGOptimizePolicy : public OptimizeModelPolicy {
{
ref_ptr<Node> optimized = node;
const SGReaderWriterOptions* sgopt
= dynamic_cast<const SGReaderWriterOptions*>(opt);
const SGReaderWriterOptions* sgopt = SGReaderWriterOptions::copyOrCreate(opt);
if (fileName.find("vpb/WS_") != string::npos) {
if (fileName.find("ws_") != string::npos) {
// Currently the only way we have to identify WS3.0 / VirtualPlanetBuilder files is by the filename
// Clean out any existing osgTerrain techniques
CleanTechniqueVisitor ctv;
optimized->accept(ctv);
// Adjust the LOD ranges as required.
double rangeFactor = SGSceneFeatures::instance()->getVPBRangeFactor();
double maxRange = SGSceneFeatures::instance()->getVPBMaxRange();
AdjustLODVisitor alv = AdjustLODVisitor(rangeFactor, maxRange);
optimized->accept(alv);
osg::ref_ptr<osgTerrain::Terrain> terrain = findTopMostNodeOfType<osgTerrain::Terrain>(optimized.get());
if (terrain != NULL) {
// Top level
terrain->setSampleRatio(1.0);
terrain->setVerticalScale(1.0);
terrain->setBlendingPolicy(osgTerrain::TerrainTile::INHERIT);
terrain->setTerrainTechniquePrototype(new VPBTechnique(sgopt));
} else {
// no Terrain node present insert one above the loaded model.
terrain = new osgTerrain::Terrain;
terrain->setSampleRatio(1.0);
terrain->setVerticalScale(1.0);
terrain->setTerrainTechniquePrototype(new VPBTechnique(sgopt));
//SG_LOG(SG_TERRAIN, SG_ALERT, "Creating Terrain Node for " << fileName);
// if CoordinateSystemNode is present copy it's contents into the Terrain, and discard it.

65
simgear/scene/tgdb/VPBTechnique.cxx
View File

@ -37,9 +37,10 @@
#include <simgear/debug/logstream.hxx>
#include <simgear/scene/util/SGReaderWriterOptions.hxx>
#include <simgear/scene/material/Effect.hxx>
#include <simgear/scene/material/EffectGeode.hxx>
#include <simgear/scene/util/SGReaderWriterOptions.hxx>
#include <simgear/scene/util/SGSceneFeatures.hxx>
#include "VPBTechnique.hxx"
@ -156,14 +157,12 @@ void VPBTechnique::init(int dirtyMask, bool assumeMultiThreaded)
else
{
applyColorLayers(*buffer, masterLocator);
applyTransparency(*buffer);
}
}
else
{
generateGeometry(*buffer, masterLocator, centerModel);
applyColorLayers(*buffer, masterLocator);
applyTransparency(*buffer);
}
if (buffer->_transform.valid()) buffer->_transform->setThreadSafeRefUnref(true);
@ -847,11 +846,10 @@ void VPBTechnique::generateGeometry(BufferData& buffer, Locator* masterLocator,
numRows = elevationLayer->getNumRows();
}
double scaleHeight = atof(_options->getPluginStringData("SimGear::ELEV_MESH_VERTICAL_SCALE").c_str());
double sampleRatio = atof(_options->getPluginStringData("SimGear::ELEV_MESH_SAMPLE_RATIO").c_str());
double constraint_gap = atof(_options->getPluginStringData("SimGear::ELEV_MESH_CONSTRAINT_GAP").c_str());
// OSG_NOTICE<<"Sample ratio="<<sampleRatio<<std::endl;
double scaleHeight = SGSceneFeatures::instance()->getVPBVerticalScale();
double sampleRatio = SGSceneFeatures::instance()->getVPBSampleRatio();
double constraint_gap = SGSceneFeatures::instance()->getVPBConstraintGap();
unsigned int minimumNumColumns = 16u;
unsigned int minimumNumRows = 16u;
@ -865,8 +863,6 @@ void VPBTechnique::generateGeometry(BufferData& buffer, Locator* masterLocator,
numRows = std::max((unsigned int) (float(originalNumRows)*sqrtf(sampleRatio)),minimumNumRows);
}
bool treatBoundariesToValidDataAsDefaultValue = _terrainTile->getTreatBoundariesToValidDataAsDefaultValue();
OSG_INFO<<"TreatBoundariesToValidDataAsDefaultValue="<<treatBoundariesToValidDataAsDefaultValue<<std::endl;
@ -1516,57 +1512,6 @@ void VPBTechnique::applyColorLayers(BufferData& buffer, Locator* masterLocator)
}
}
void VPBTechnique::applyTransparency(BufferData& buffer)
{
TerrainTile::BlendingPolicy blendingPolicy = _terrainTile->getBlendingPolicy();
if (blendingPolicy == TerrainTile::INHERIT && _terrainTile->getTerrain())
{
OSG_INFO<<"VPBTechnique::applyTransparency() inheriting policy from Terrain"<<std::endl;
blendingPolicy = _terrainTile->getTerrain()->getBlendingPolicy();
}
if (blendingPolicy == TerrainTile::INHERIT)
{
OSG_INFO<<"VPBTechnique::applyTransparency() policy is INHERIT, defaulting to ENABLE_BLENDING_WHEN_ALPHA_PRESENT"<<std::endl;
blendingPolicy = TerrainTile::ENABLE_BLENDING_WHEN_ALPHA_PRESENT;
}
if (blendingPolicy == TerrainTile::DO_NOT_SET_BLENDING)
{
OSG_INFO<<"blendingPolicy == TerrainTile::DO_NOT_SET_BLENDING"<<std::endl;
return;
}
bool enableBlending = false;
if (blendingPolicy == TerrainTile::ENABLE_BLENDING)
{
OSG_INFO<<"blendingPolicy == TerrainTile::ENABLE_BLENDING"<<std::endl;
enableBlending = true;
}
else if (blendingPolicy == TerrainTile::ENABLE_BLENDING_WHEN_ALPHA_PRESENT)
{
OSG_INFO<<"blendingPolicy == TerrainTile::ENABLE_BLENDING_WHEN_ALPHA_PRESENT"<<std::endl;
for(unsigned int i=0; i<_terrainTile->getNumColorLayers(); ++i)
{
osg::Image* image = (_terrainTile->getColorLayer(i)!=0) ? _terrainTile->getColorLayer(i)->getImage() : 0;
if (image)
{
enableBlending = image->isImageTranslucent();
break;
}
}
}
if (enableBlending)
{
osg::StateSet* stateset = buffer._geode->getOrCreateStateSet();
stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
stateset->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
}
}
void VPBTechnique::update(osg::NodeVisitor& nv)
{
if (_terrainTile) _terrainTile->osg::Group::traverse(nv);

2
simgear/scene/tgdb/VPBTechnique.hxx
View File

@ -115,8 +115,6 @@ class VPBTechnique : public TerrainTechnique
virtual void applyColorLayers(BufferData& buffer, Locator* masterLocator);
virtual void applyTransparency(BufferData& buffer);
OpenThreads::Mutex _writeBufferMutex;
osg::ref_ptr<BufferData> _currentBufferData;
osg::ref_ptr<BufferData> _newBufferData;

20
simgear/scene/util/SGSceneFeatures.hxx
View File

@ -64,6 +64,21 @@ public:
bool getVPBActive() const { return _VPBActive; }
void setVPBActive(const bool val) { _VPBActive = val; }
float getVPBRangeFactor() const { return _VPBRangeFactor; }
void setVPBRangeFactor(const float val) { _VPBRangeFactor = val; }
float getVPBMaxRange() const { return _VPBMaxRange; }
void setVPBMaxRange(const float val) { _VPBMaxRange = val; }
float getVPBConstraintGap() const { return _VPBConstraintGap; }
void setVPBConstraintGap(const float val) { _VPBConstraintGap = val; }
float getVPBSampleRatio() const { return _VPBSampleRatio; }
void setVPBSampleRatio(const float val) { _VPBSampleRatio = val; }
float getVPBVerticalScale() const { return _VPBVerticalScale; }
void setVPBVerticalScale(const float val) { _VPBVerticalScale = val; }
void setEnablePointSpriteLights(bool enable)
{
_pointSpriteLights = enable;
@ -150,6 +165,11 @@ private:
bool _distanceAttenuationLights;
int _textureFilter;
bool _VPBActive;
float _VPBConstraintGap;
float _VPBRangeFactor;
float _VPBMaxRange;
float _VPBSampleRatio;
float _VPBVerticalScale;
};
#endif