Updates for improvements to osgdem, such as adding support for skirt
and border into osg::HeightField, handling of computation of neigherbouring tiles in osgdem's DestinationGraph.
This commit is contained in:
Robert Osfield
parent
c06c73993e
commit
b9f032bbb5
@ -17,6 +17,7 @@
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#include <osg/ShapeDrawable>
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#include <osg/Texture2D>
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#include <osg/Group>
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#include <osg/Geometry>
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#include <osgDB/ReadFile>
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#include <osgDB/WriteFile>
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@ -772,6 +773,7 @@ void DataSet::Source::buildOverviews()
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DataSet::DestinationTile::DestinationTile():
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_dataSet(0),
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_imagery_maxNumColumns(4096),
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_imagery_maxNumRows(4096),
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_imagery_maxSourceResolutionX(0.0f),
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@ -918,6 +920,17 @@ void DataSet::DestinationTile::allocate()
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}
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void DataSet::DestinationTile::computeNeighboursFromQuadMap()
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{
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if (_dataSet)
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{
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setNeighbours(_dataSet->getTile(_level,_X-1,_Y),_dataSet->getTile(_level,_X-1,_Y-1),
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_dataSet->getTile(_level,_X,_Y-1),_dataSet->getTile(_level,_X+1,_Y-1),
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_dataSet->getTile(_level,_X+1,_Y),_dataSet->getTile(_level,_X+1,_Y+1),
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_dataSet->getTile(_level,_X,_Y+1),_dataSet->getTile(_level,_X-1,_Y+1));
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}
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}
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void DataSet::DestinationTile::setNeighbours(DestinationTile* left, DestinationTile* left_below,
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DestinationTile* below, DestinationTile* below_right,
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DestinationTile* right, DestinationTile* right_above,
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@ -1302,8 +1315,12 @@ osg::Node* DataSet::DestinationTile::createScene()
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{
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if (_terrain.valid() && _terrain->_heightField.valid())
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{
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osg::HeightField* hf = _terrain->_heightField.get();
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hf->setSkirtHeight(0.003f);
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osg::Geode* geode = new osg::Geode;
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geode->addDrawable(new osg::ShapeDrawable(_terrain->_heightField.get()));
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geode->addDrawable(new osg::ShapeDrawable(hf));
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if (_imagery.valid() && _imagery->_image.valid())
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{
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@ -1319,6 +1336,89 @@ osg::Node* DataSet::DestinationTile::createScene()
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stateset->setTextureAttributeAndModes(0,texture,osg::StateAttribute::ON);
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}
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// create the skirt.
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if (false)
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{
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osg::Vec3 skirtVector(0.0f,0.0f,-0.003f);
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int numColumns = hf->getNumColumns();
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int numRows = hf->getNumRows();
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int numVerticesInSkirt = 2*(numColumns*2 + numRows*2 - 3);
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osg::Geometry* skirt = new osg::Geometry;
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osg::Vec3Array& v = *(new osg::Vec3Array(numVerticesInSkirt));
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osg::Vec3Array& n = *(new osg::Vec3Array(numVerticesInSkirt));
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osg::Vec2Array& t = *(new osg::Vec2Array(numVerticesInSkirt));
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osg::DrawArrays& skirtDrawArrays = *(new osg::DrawArrays(GL_QUAD_STRIP,0,numVerticesInSkirt));
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int vi=0;
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int r,c;
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// create bottom skirt vertices
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r=0;
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float dt_dx = 1.0f/(float)(numColumns-1);
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float dt_dy = 1.0f/(float)(numRows-1);
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for(c=0;c<numColumns-1;++c)
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{
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v[vi] = hf->getVertex(c,r);
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n[vi] = hf->getNormal(c,r);
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t[vi++] = osg::Vec2(c*dt_dx,r*dt_dy);
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v[vi] = hf->getVertex(c,r)+skirtVector;
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n[vi] = hf->getNormal(c,r);
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t[vi++] = osg::Vec2(c*dt_dx,r*dt_dy);
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}
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// create right skirt vertices
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c=numColumns-1;
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for(r=0;r<numRows-1;++r)
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{
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v[vi] = hf->getVertex(c,r);
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n[vi] = hf->getNormal(c,r);
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t[vi++] = osg::Vec2(c*dt_dx,r*dt_dy);
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v[vi] = hf->getVertex(c,r)+skirtVector;
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n[vi] = hf->getNormal(c,r);
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t[vi++] = osg::Vec2(c*dt_dx,r*dt_dy);
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}
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// create top skirt vertices
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r=numRows-1;
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for(c=numColumns-1;c>0;--c)
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{
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v[vi] = hf->getVertex(c,r);
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n[vi] = hf->getNormal(c,r);
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t[vi++] = osg::Vec2(c*dt_dx,r*dt_dy);
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v[vi] = hf->getVertex(c,r)+skirtVector;
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n[vi] = hf->getNormal(c,r);
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t[vi++] = osg::Vec2(c*dt_dx,r*dt_dy);
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}
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// create left skirt vertices
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c=0;
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for(r=numRows-1;r>=0;--r)
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{
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v[vi] = hf->getVertex(c,r);
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n[vi] = hf->getNormal(c,r);
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t[vi++] = osg::Vec2(c*dt_dx,r*dt_dy);
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v[vi] = hf->getVertex(c,r)+skirtVector;
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n[vi] = hf->getNormal(c,r);
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t[vi++] = osg::Vec2(c*dt_dx,r*dt_dy);
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}
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// pass arrays to Geometry
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skirt->setVertexArray(&v);
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skirt->setNormalArray(&n);
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skirt->setNormalBinding(osg::Geometry::BIND_PER_VERTEX);
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skirt->setTexCoordArray(0,&t);
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skirt->addPrimitiveSet(&skirtDrawArrays);
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geode->addDrawable(skirt);
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}
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return geode;
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}
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else
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@ -1375,6 +1475,24 @@ void DataSet::DestinationTile::addRequiredResolutions(CompositeSource* sourceGra
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}
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}
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void DataSet::CompositeDestination::computeNeighboursFromQuadMap()
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{
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// handle leaves
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for(TileList::iterator titr=_tiles.begin();
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titr!=_tiles.end();
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++titr)
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{
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(*titr)->computeNeighboursFromQuadMap();
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}
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// handle chilren
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for(ChildList::iterator citr=_children.begin();
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citr!=_children.end();
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++citr)
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{
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(*citr)->computeNeighboursFromQuadMap();
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}
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}
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void DataSet::CompositeDestination::addRequiredResolutions(CompositeSource* sourceGraph)
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{
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@ -1617,6 +1735,7 @@ DataSet::CompositeDestination* DataSet::createDestinationGraph(osgTerrain::Coord
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DestinationTile* tile = new DestinationTile;
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tile->_name = os.str();
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tile->_dataSet = this;
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tile->_cs = cs;
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tile->_extents = extents;
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tile->_level = currentLevel;
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@ -1627,6 +1746,8 @@ DataSet::CompositeDestination* DataSet::createDestinationGraph(osgTerrain::Coord
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tile->computeMaximumSourceResolution(_sourceGraph.get());
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tile->allocate();
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insertTileToQuadMap(tile);
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if (currentLevel>=maxNumLevels-1)
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{
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// bottom level can't divide any further.
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@ -1801,9 +1922,8 @@ void DataSet::computeDestinationGraphFromSources(unsigned int numLevels)
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0,
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numLevels);
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// now traverse the destination graph to build neighbours.
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_destinationGraph->computeNeighboursFromQuadMap();
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}
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@ -1913,7 +2033,7 @@ void DataSet::updateSourcesForDestinationGraphNeeds()
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for(CompositeSource::source_iterator itr(_sourceGraph.get());itr.valid();++itr)
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{
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Source* source = itr->get();
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//source->buildOverviews();
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source->buildOverviews();
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}
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}
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@ -633,6 +633,8 @@ class DataSet : public osg::Referenced
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DestinationTile();
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void computeNeighboursFromQuadMap();
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void setNeighbours(DestinationTile* left, DestinationTile* left_below,
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DestinationTile* below, DestinationTile* below_right,
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@ -675,6 +677,8 @@ class DataSet : public osg::Referenced
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std::string _name;
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DataSet* _dataSet;
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osg::ref_ptr<DestinationData> _imagery;
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osg::ref_ptr<DestinationData> _terrain;
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osg::ref_ptr<DestinationData> _models;
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@ -712,6 +716,8 @@ class DataSet : public osg::Referenced
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_type(GROUP),
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_maxVisibleDistance(FLT_MAX) {}
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void computeNeighboursFromQuadMap();
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void addRequiredResolutions(CompositeSource* sourceGraph);
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void readFrom(CompositeSource* sourceGraph);
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@ -730,6 +736,29 @@ class DataSet : public osg::Referenced
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};
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typedef std::map<unsigned int,DestinationTile*> Column;
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typedef std::map<unsigned int,Column> Level;
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typedef std::map<unsigned int,Level> QuadMap;
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void insertTileToQuadMap(DestinationTile* tile)
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{
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_quadMap[tile->_level][tile->_X][tile->_Y] = tile;
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}
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DestinationTile* getTile(unsigned int level,unsigned int X, unsigned int Y)
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{
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QuadMap::iterator levelItr = _quadMap.find(level);
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if (levelItr==_quadMap.end()) return 0;
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Level::iterator columnItr = levelItr->second.find(X);
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if (columnItr==levelItr->second.end()) return 0;
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Column::iterator rowItr = columnItr->second.find(Y);
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if (rowItr==columnItr->second.end()) return 0;
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else return rowItr->second;
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}
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public:
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@ -777,6 +806,8 @@ class DataSet : public osg::Referenced
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osg::ref_ptr<CompositeSource> _sourceGraph;
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osg::ref_ptr<CompositeDestination> _destinationGraph;
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QuadMap _quadMap;
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osg::ref_ptr<osgTerrain::CoordinateSystem> _coordinateSystem;
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osg::Matrixd _geoTransform;
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@ -423,7 +423,9 @@ class SG_EXPORT HeightField : public Shape
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_rows(0),
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_origin(0.0f,0.0f,0.0f),
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_dx(1.0f),
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_dy(1.0f) {}
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_dy(1.0f),
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_skirtHeight(0.0f),
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_borderWidth(0) {}
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HeightField(const HeightField& mesh,const CopyOp& copyop=CopyOp::SHALLOW_COPY):
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Shape(mesh,copyop),
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@ -432,6 +434,8 @@ class SG_EXPORT HeightField : public Shape
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_origin(mesh._origin),
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_dx(mesh._dx),
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_dy(mesh._dy),
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_skirtHeight(mesh._skirtHeight),
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_borderWidth(mesh._borderWidth),
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_heights(mesh._heights) {}
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META_Shape(osg, HeightField)
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@ -455,6 +459,28 @@ class SG_EXPORT HeightField : public Shape
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inline void setYInterval(float dy) { _dy = dy; }
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inline float getYInterval() const { return _dy; }
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/** Set the height of the skirt to render around the edge of HeightField.
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* The skirt is used as a means of disguising edge boundaries between adjacent HeightField, particular
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* of ones with different resolutions.*/
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void setSkirtHeight(float skirtHeight) { _skirtHeight = skirtHeight; }
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/** Get the height of the skirt to render around the edge of HeightField.*/
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float getSkirtHeight() const { return _skirtHeight; }
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/** Set the width in number of cells in from the edge that the height field should be rendered from.
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* This exists to allow gradient and curvature continutity to be maintained between adjacent HeightField, where
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* the border cells will overlap adjacent HeightField.*/
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void setBorderWidth(unsigned int borderWidth) { _borderWidth = borderWidth; }
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/** Get the width in number of cells in from the edge that the height field should be rendered from.*/
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unsigned int getBorderWidth() const { return _borderWidth; }
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inline void setRotation(const Quat& quat) { _rotation = quat; }
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inline const Quat& getRotation() const { return _rotation; }
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inline Matrix getRotationMatrix() const { return Matrix(_rotation); }
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inline bool zeroRotation() const { return _rotation.zeroRotation(); }
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inline void setHeight(unsigned int c,unsigned int r,float value)
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{
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@ -474,25 +500,31 @@ class SG_EXPORT HeightField : public Shape
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HeightList& getHeightList() { return _heights; }
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const HeightList& getHeightList() const { return _heights; }
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inline Vec3 getVertex(unsigned int c,unsigned int r) const
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{
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return Vec3(_origin.x()+getXInterval()*(float)c,
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_origin.y()+getYInterval()*(float)r,
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_origin.z()+_heights[c+r*_columns]);
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}
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Vec3 getNormal(unsigned int c,unsigned int r) const;
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inline void setRotation(const Quat& quat) { _rotation = quat; }
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inline const Quat& getRotation() const { return _rotation; }
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inline Matrix getRotationMatrix() const { return Matrix(_rotation); }
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inline bool zeroRotation() const { return _rotation.zeroRotation(); }
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protected:
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~HeightField() {}
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unsigned int _columns,_rows;
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unsigned int _columns,_rows;
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osg::Vec3 _origin;
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float _dx;
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float _dy;
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osg::Vec3 _origin;
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float _dx;
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float _dy;
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Quat _rotation;
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HeightList _heights;
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float _skirtHeight;
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unsigned int _borderWidth;
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Quat _rotation;
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HeightList _heights;
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};
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typedef HeightField Grid;
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@ -56,6 +56,11 @@ class Vec3
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_v[0]=x; _v[1]=y; _v[2]=z;
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}
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inline void set( const Vec3& rhs)
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{
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_v[0]=rhs._v[0]; _v[1]=rhs._v[1]; _v[2]=rhs._v[2];
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}
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inline float& operator [] (int i) { return _v[i]; }
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inline float operator [] (int i) const { return _v[i]; }
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@ -564,6 +564,7 @@ void DrawShapeVisitor::apply(const HeightField& field)
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glPushMatrix();
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glTranslatef(field.getOrigin().x(),field.getOrigin().y(),field.getOrigin().z());
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if (!field.zeroRotation())
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{
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@ -578,21 +579,102 @@ void DrawShapeVisitor::apply(const HeightField& field)
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float dv = 1.0f/((float)field.getNumRows()-1.0f);
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float vBase = 0.0f;
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Vec3 vertTop;
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Vec3 normTop;
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Vec3 vertBase;
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Vec3 normBase;
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if (field.getSkirtHeight()!=0.0f)
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{
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glBegin(GL_QUAD_STRIP);
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float u = 0.0f;
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// draw bottom skirt
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unsigned int col;
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vertTop.y() = 0.0f;
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for(col=0;col<field.getNumColumns();++col,u+=du)
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{
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vertTop.x() = dx*(float)col;
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vertTop.z() = field.getHeight(col,0);
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normTop.set(field.getNormal(col,0));
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glTexCoord2f(u,0.0f);
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glNormal3fv(normTop.ptr());
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glVertex3fv(vertTop.ptr());
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vertTop.z()-=field.getSkirtHeight();
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glVertex3fv(vertTop.ptr());
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}
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glEnd();
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// draw top skirt
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glBegin(GL_QUAD_STRIP);
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unsigned int row = field.getNumRows()-1;
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u = 0.0f;
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vertTop.y() = dy*(float)(row);
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for(col=0;col<field.getNumColumns();++col,u+=du)
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{
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vertTop.x() = dx*(float)col;
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vertTop.z() = field.getHeight(col,row);
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normTop.set(field.getNormal(col,row));
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glTexCoord2f(u,1.0f);
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glNormal3fv(normTop.ptr());
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glVertex3f(vertTop.x(),vertTop.y(),vertTop.z()-field.getSkirtHeight());
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//vertTop.z()-=field.getSkirtHeight();
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glVertex3fv(vertTop.ptr());
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}
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glEnd();
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}
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for(unsigned int row=0;row<field.getNumRows()-1;++row,vBase+=dv)
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{
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float vTop = vBase+dv;
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float u = 0.0f;
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glBegin(GL_QUAD_STRIP);
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// draw skirt at begining if required.
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if (field.getSkirtHeight()!=0.0f)
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{
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vertTop.set(0.0f,dy*(float)row+dy,field.getHeight(0,row+1)-field.getSkirtHeight());
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normTop.set(field.getNormal(0,row+1));
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vertBase.set(0.0f,dy*(float)row,field.getHeight(0,row)-field.getSkirtHeight());
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normBase.set(field.getNormal(0,row));
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glTexCoord2f(u,vTop);
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glNormal3fv(normTop.ptr());
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glVertex3fv(vertTop.ptr());
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glTexCoord2f(u,vBase);
|
||||
glNormal3fv(normBase.ptr());
|
||||
glVertex3fv(vertBase.ptr());
|
||||
}
|
||||
|
||||
for(unsigned int col=0;col<field.getNumColumns();++col,u+=du)
|
||||
{
|
||||
Vec3 vertTop(dx*(float)col,dy*(float)row+dy,field.getHeight(col,row+1));
|
||||
Vec3 normTop(field.getNormal(col,row+1));
|
||||
vertTop.set(dx*(float)col,dy*(float)row+dy,field.getHeight(col,row+1));
|
||||
normTop.set(field.getNormal(col,row+1));
|
||||
|
||||
Vec3 vertBase(dx*(float)col,dy*(float)row,field.getHeight(col,row));
|
||||
Vec3 normBase(field.getNormal(col,row));
|
||||
vertBase.set(dx*(float)col,dy*(float)row,field.getHeight(col,row));
|
||||
normBase.set(field.getNormal(col,row));
|
||||
|
||||
glTexCoord2f(u,vTop);
|
||||
glNormal3fv(normTop.ptr());
|
||||
@ -604,6 +686,22 @@ void DrawShapeVisitor::apply(const HeightField& field)
|
||||
|
||||
}
|
||||
|
||||
// draw skirt at end if required.
|
||||
if (field.getSkirtHeight()!=0.0f)
|
||||
{
|
||||
|
||||
vertBase.z()-=field.getSkirtHeight();
|
||||
vertTop.z()-=field.getSkirtHeight();
|
||||
|
||||
glTexCoord2f(u,vTop);
|
||||
glNormal3fv(normTop.ptr());
|
||||
glVertex3fv(vertTop.ptr());
|
||||
|
||||
glTexCoord2f(u,vBase);
|
||||
glNormal3fv(normBase.ptr());
|
||||
glVertex3fv(vertBase.ptr());
|
||||
}
|
||||
|
||||
glEnd();
|
||||
}
|
||||
|
||||
|
||||
@ -358,6 +358,24 @@ bool HeightField_readLocalData(Object& obj, Input& fr)
|
||||
iteratorAdvanced = true;
|
||||
}
|
||||
|
||||
if (fr.matchSequence("SkirtHeight %f"))
|
||||
{
|
||||
float height;
|
||||
fr[1].getFloat(height);
|
||||
heightfield.setSkirtHeight(height);
|
||||
fr+=2;
|
||||
iteratorAdvanced = true;
|
||||
}
|
||||
|
||||
if (fr.matchSequence("BorderWidth %i"))
|
||||
{
|
||||
unsigned int width;
|
||||
fr[1].getUInt(width);
|
||||
heightfield.setBorderWidth(width);
|
||||
fr+=2;
|
||||
iteratorAdvanced = true;
|
||||
}
|
||||
|
||||
if (fr.matchSequence("Rotation %f %f %f %f"))
|
||||
{
|
||||
osg::Quat rotation;
|
||||
@ -426,6 +444,8 @@ bool HeightField_writeLocalData(const Object& obj, Output& fw)
|
||||
fw.indent()<<"Origin "<<heightfield.getOrigin().x()<<" "<<heightfield.getOrigin().y()<<" "<<heightfield.getOrigin().z()<<std::endl;
|
||||
fw.indent()<<"XInterval "<<heightfield.getXInterval()<<std::endl;
|
||||
fw.indent()<<"YInterval "<<heightfield.getYInterval()<<std::endl;
|
||||
fw.indent()<<"SkirtHeight "<<heightfield.getSkirtHeight()<<std::endl;
|
||||
fw.indent()<<"BorderWidth "<<heightfield.getBorderWidth()<<std::endl;
|
||||
fw.indent()<<"Rotation "<<heightfield.getRotation()<<std::endl;
|
||||
fw.precision(prec);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user