FGFS-4.1/OpenSceneGraph
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Added support for compute the extents on local NDC coordiantes of the

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elevation and colour layers
This commit is contained in:
Robert Osfield
2007-03-28 16:28:20 +00:00
parent b7967b7007
commit cb811aa7cd
4 changed files with 123 additions and 11 deletions
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71
src/osgTerrain/GeometryTechnique.cpp
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@@ -12,6 +12,8 @@
*/
#include <osgTerrain/GeometryTechnique>
#include <osgTerrain/TerrainNode>
#include <osg/io_utils>
using namespace osgTerrain;
@@ -32,24 +34,86 @@ void GeometryTechnique::init()
{
osg::notify(osg::NOTICE)<<"Doing init()"<<std::endl;
if (!_terrainNode) return;
osgTerrain::Layer* elevationLayer = _terrainNode->getElevationLayer();
osgTerrain::Layer* colorLayer = _terrainNode->getColorLayer();
osg::TransferFunction* colorTF = _terrainNode->getColorTransferFunction();
osg::notify(osg::NOTICE)<<"elevationLayer = "<<elevationLayer<<std::endl;
osg::notify(osg::NOTICE)<<"colorLayer = "<<colorLayer<<std::endl;
osg::notify(osg::NOTICE)<<"colorTF = "<<colorTF<<std::endl;
Locator* elevationLocator = elevationLayer ? elevationLayer->getLocator() : 0;
Locator* colorLocator = colorLayer ? colorLayer->getLocator() : 0;
Locator* masterLocator = elevationLocator ? elevationLocator : colorLocator;
if (!masterLocator)
{
osg::notify(osg::NOTICE)<<"Problem, no locator found in any of the terrain layers"<<std::endl;
return;
}
if (!elevationLocator) elevationLocator = masterLocator;
if (!colorLocator) colorLocator = masterLocator;
osg::Vec3d bottomLeftNDC(DBL_MAX, DBL_MAX, 0.0);
osg::Vec3d topRightNDC(-DBL_MAX, -DBL_MAX, 0.0);
if (elevationLayer)
{
if (elevationLocator!= masterLocator)
{
masterLocator->computeLocalBounds(*elevationLocator, bottomLeftNDC, topRightNDC);
}
else
{
bottomLeftNDC.x() = osg::minimum(bottomLeftNDC.x(), 0.0);
bottomLeftNDC.y() = osg::minimum(bottomLeftNDC.y(), 0.0);
topRightNDC.x() = osg::maximum(topRightNDC.x(), 1.0);
topRightNDC.y() = osg::maximum(topRightNDC.y(), 1.0);
}
}
if (colorLayer)
{
if (colorLocator!= masterLocator)
{
masterLocator->computeLocalBounds(*colorLocator, bottomLeftNDC, topRightNDC);
}
else
{
bottomLeftNDC.x() = osg::minimum(bottomLeftNDC.x(), 0.0);
bottomLeftNDC.y() = osg::minimum(bottomLeftNDC.y(), 0.0);
topRightNDC.x() = osg::maximum(topRightNDC.x(), 1.0);
topRightNDC.y() = osg::maximum(topRightNDC.y(), 1.0);
}
}
osg::notify(osg::NOTICE)<<"bottomLeftNDC = "<<bottomLeftNDC<<std::endl;
osg::notify(osg::NOTICE)<<"topRightNDC = "<<topRightNDC<<std::endl;
_geode = new osg::Geode;
_geometry = new osg::Geometry;
_geode->addDrawable(_geometry.get());
osg::Vec3Array* vertices = new osg::Vec3Array;
osg::Vec3Array* normals = new osg::Vec3Array;
osg::Vec2Array* texcoords = new osg::Vec2Array;
_dirty = false;
}
void GeometryTechnique::update(osgUtil::UpdateVisitor* nv)
{
osg::notify(osg::NOTICE)<<"Doing update"<<std::endl;
}
void GeometryTechnique::cull(osgUtil::CullVisitor* nv)
{
osg::notify(osg::NOTICE)<<"Doing cull"<<std::endl;
if (_geode.valid())
{
_geode->accept(*nv);
@@ -58,7 +122,6 @@ void GeometryTechnique::cull(osgUtil::CullVisitor* nv)
void GeometryTechnique::cleanSceneGraph()
{
osg::notify(osg::NOTICE)<<"Cleaning scene graph"<<std::endl;
}
void GeometryTechnique::dirty()