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Tweaked the KdTree intersection performance testing code block

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This commit is contained in:
Robert Osfield 2008-07-11 16:50:43 +00:00
parent 8a6c25425e
commit 9866eb93f8
1 changed files with 12 additions and 3 deletions
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15
src/osgViewer/View.cpp
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@ -1826,34 +1826,43 @@ bool View::computeIntersections(float x,float y, osgUtil::LineSegmentIntersector
const_cast<osg::Camera*>(camera)->accept(iv);
#else
// timing test code paths
// timing test code paths for comparing KdTree based intersections vs conventional intersections
iv.setUseKdTreeWhenAvailable(true);
iv.setDoDummyTraversal(true);
const_cast<osg::Camera*>(camera)->accept(iv);
osg::Timer_t before = osg::Timer::instance()->tick();
const_cast<osg::Camera*>(camera)->accept(iv);
osg::Timer_t after_dummy = osg::Timer::instance()->tick();
int intersectsBeforeKdTree = picker->getIntersections().size();
iv.setDoDummyTraversal(false);
const_cast<osg::Camera*>(camera)->accept(iv);
osg::Timer_t after_kdTree_2 = osg::Timer::instance()->tick();
int intersectsBeforeConventional = picker->getIntersections().size();
iv.setUseKdTreeWhenAvailable(false);
const_cast<osg::Camera*>(camera)->accept(iv);
osg::Timer_t after = osg::Timer::instance()->tick();
int intersectsAfterConventional = picker->getIntersections().size();
double timeDummy = osg::Timer::instance()->delta_m(before, after_dummy);
double timeKdTree = osg::Timer::instance()->delta_m(after_dummy, after_kdTree_2);
double timeConventional = osg::Timer::instance()->delta_m(after_kdTree_2, after);
osg::notify(osg::NOTICE)<<"Using Dummy "<<timeDummy<<std::endl;
osg::notify(osg::NOTICE)<<" KdTrees "<<timeKdTree<<std::endl;
osg::notify(osg::NOTICE)<<" KdTrees "<<timeKdTree
<<"\tNum intersects = "<<intersectsBeforeConventional-intersectsBeforeKdTree<<std::endl;
osg::notify(osg::NOTICE)<<" KdTrees - Traversal "<<timeKdTree-timeDummy<<std::endl;
osg::notify(osg::NOTICE)<<" Conventional "<<timeConventional<<std::endl;
osg::notify(osg::NOTICE)<<" Conventional "<<timeConventional
<<"\tNum intersects = "<<intersectsAfterConventional-intersectsBeforeConventional<<std::endl;
osg::notify(osg::NOTICE)<<" Conventional - Traversal "<<timeConventional-timeDummy<<std::endl;
osg::notify(osg::NOTICE)<<" Delta "<<timeConventional/timeKdTree<<std::endl;
osg::notify(osg::NOTICE)<<" Delta sans Traversal "<<(timeConventional-timeDummy)/(timeKdTree-timeDummy)<<std::endl;