FGFS-4.1/OpenSceneGraph
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Implemented HeightAboveTerrain and added usage into osgintersection

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This commit is contained in:
Robert Osfield
2006-10-31 12:59:51 +00:00
parent e9b501002c
commit a253e17d3e
5 changed files with 215 additions and 14 deletions
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37
examples/osgintersection/osgintersection.cpp
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@@ -1,6 +1,7 @@
#include <osg/ArgumentParser>
#include <osg/ApplicationUsage>
#include <osg/Timer>
#include <osg/CoordinateSystemNode>
#include <osg/Notify>
#include <osg/io_utils>
@@ -9,6 +10,7 @@
#include <osgUtil/IntersectionVisitor>
#include <osgSim/LineOfSight>
#include <osgSim/HeightAboveTerrain>
#include <iostream>
@@ -31,9 +33,9 @@ int main(int argc, char **argv)
arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName());
arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
osg::ref_ptr<osg::Node> root = osgDB::readNodeFiles(arguments);
osg::ref_ptr<osg::Node> scene = osgDB::readNodeFiles(arguments);
if (!root)
if (!scene)
{
std::cout<<"No model loaded, please specify a valid model on the command line."<<std::endl;
return 0;
@@ -42,8 +44,10 @@ int main(int argc, char **argv)
std::cout<<"Intersection "<<std::endl;
osg::CoordinateSystemNode* csn = dynamic_cast<osg::CoordinateSystemNode*>(scene.get());
osg::EllipsoidModel* em = csn ? csn->getEllipsoidModel() : 0;
osg::BoundingSphere bs = root->getBound();
osg::BoundingSphere bs = scene->getBound();
bool useIntersectorGroup = true;
@@ -57,10 +61,13 @@ int main(int argc, char **argv)
osg::Vec3d end = bs.center();// - osg::Vec3d(0.0, bs.radius(),0.0);
osg::Vec3d deltaRow( 0.0, 0.0, bs.radius()*0.01);
osg::Vec3d deltaColumn( bs.radius()*0.01, 0.0, 0.0);
unsigned int numRows = 50;
unsigned int numColumns = 50;
unsigned int numRows = 20;
unsigned int numColumns = 20;
osgSim::LineOfSight los;
osgSim::HeightAboveTerrain hat;
hat.setDatabaseCacheReadCallback(los.getDatabaseCacheReadCallback());
for(unsigned int r=0; r<numRows; ++r)
{
@@ -69,17 +76,20 @@ int main(int argc, char **argv)
osg::Vec3d s = start + deltaColumn * double(c) + deltaRow * double(r);
osg::Vec3d e = end + deltaColumn * double(c) + deltaRow * double(r);
los.addLOS(s,e);
hat.addPoint(s);
}
}
los.computeIntersections(root.get());
std::cout<<"Computing LineOfSight"<<std::endl;
los.computeIntersections(scene.get());
osg::Timer_t endTick = osg::Timer::instance()->tick();
std::cout<<"Completed in "<<osg::Timer::instance()->delta_s(startTick,endTick)<<std::endl;
#if 0
#if 1
for(unsigned int i=0; i<los.getNumLOS(); i++)
{
const osgSim::LineOfSight::Intersections& intersections = los.getIntersections(i);
@@ -95,8 +105,15 @@ int main(int argc, char **argv)
// now do a second traversal to test performance of cache.
startTick = osg::Timer::instance()->tick();
los.computeIntersections(root.get());
std::cout<<"Computing HeightAboveTerrain"<<std::endl;
hat.computeIntersections(scene.get());
for(unsigned int i=0; i<hat.getNumPoints(); i++)
{
std::cout<<" point = "<<hat.getPoint(i)<<" hat = "<<hat.getHeightAboveTerrain(i)<<std::endl;
}
endTick = osg::Timer::instance()->tick();
std::cout<<"Completed in "<<osg::Timer::instance()->delta_s(startTick,endTick)<<std::endl;
@@ -128,7 +145,7 @@ int main(int argc, char **argv)
osgUtil::IntersectionVisitor intersectVisitor( intersectorGroup.get(), new MyReadCallback );
root->accept(intersectVisitor);
scene->accept(intersectVisitor);
osg::Timer_t endTick = osg::Timer::instance()->tick();
@@ -181,7 +198,7 @@ int main(int argc, char **argv)
osgUtil::IntersectionVisitor intersectVisitor( intersector.get(), new MyReadCallback );
root->accept(intersectVisitor);
scene->accept(intersectVisitor);
osg::Timer_t endTick = osg::Timer::instance()->tick();