本文整理汇总了C++中osg::Polytope::clear方法的典型用法代码示例。如果您正苦于以下问题：C++ Polytope::clear方法的具体用法？C++ Polytope::clear怎么用？C++ Polytope::clear使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类osg::Polytope的用法示例。
在下文中一共展示了Polytope::clear方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
bool
Feature::getWorldBoundingPolytope(const SpatialReference* srs,
osg::Polytope& out_polytope) const
{
osg::BoundingSphered bs;
if ( getWorldBound(srs, bs) && bs.valid() )
{
out_polytope.clear();
// add planes for the four sides of the BS. Normals point inwards.
out_polytope.add( osg::Plane(osg::Vec3d( 1, 0,0), osg::Vec3d(-bs.radius(),0,0)) );
out_polytope.add( osg::Plane(osg::Vec3d(-1, 0,0), osg::Vec3d( bs.radius(),0,0)) );
out_polytope.add( osg::Plane(osg::Vec3d( 0, 1,0), osg::Vec3d(0, -bs.radius(),0)) );
out_polytope.add( osg::Plane(osg::Vec3d( 0,-1,0), osg::Vec3d(0, bs.radius(),0)) );
// for a projected feature, we're done. For a geocentric one, transform the polytope
// into world (ECEF) space.
if ( srs->isGeographic() && !srs->isPlateCarre() )
{
const osg::EllipsoidModel* e = srs->getEllipsoid();
// add a bottom cap, unless the bounds are sufficiently large.
double minRad = std::min(e->getRadiusPolar(), e->getRadiusEquator());
double maxRad = std::max(e->getRadiusPolar(), e->getRadiusEquator());
double zeroOffset = bs.center().length();
if ( zeroOffset > minRad * 0.1 )
{
out_polytope.add( osg::Plane(osg::Vec3d(0,0,1), osg::Vec3d(0,0,-maxRad+zeroOffset)) );
}
}
// transform the clipping planes ito ECEF space
GeoPoint refPoint;
refPoint.fromWorld( srs, bs.center() );
osg::Matrix local2world;
refPoint.createLocalToWorld( local2world );
out_polytope.transform( local2world );
return true;
}
return false;
}