本文整理汇总了C++中PointViewPtr::build2dIndex方法的典型用法代码示例。如果您正苦于以下问题：C++ PointViewPtr::build2dIndex方法的具体用法？C++ PointViewPtr::build2dIndex怎么用？C++ PointViewPtr::build2dIndex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PointViewPtr的用法示例。
在下文中一共展示了PointViewPtr::build2dIndex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: filter
void HAGFilter::filter(PointView& view)
{
PointViewPtr gView = view.makeNew();
PointViewPtr ngView = view.makeNew();
std::vector<PointId> gIdx, ngIdx;
// First pass: Separate into ground and non-ground views.
for (PointId i = 0; i < view.size(); ++i)
{
double c = view.getFieldAs<double>(Dimension::Id::Classification, i);
if (c == 2)
{
gView->appendPoint(view, i);
gIdx.push_back(i);
}
else
{
ngView->appendPoint(view, i);
ngIdx.push_back(i);
}
}
// Bail if there weren't any points classified as ground.
if (gView->size() == 0)
throwError("Input PointView does not have any points classified "
"as ground");
// Build the 2D KD-tree.
KD2Index& kdi = gView->build2dIndex();
// Second pass: Find Z difference between non-ground points and the nearest
// neighbor (2D) in the ground view.
for (PointId i = 0; i < ngView->size(); ++i)
{
PointRef point = ngView->point(i);
double z0 = point.getFieldAs<double>(Dimension::Id::Z);
auto ids = kdi.neighbors(point, 1);
double z1 = gView->getFieldAs<double>(Dimension::Id::Z, ids[0]);
view.setField(Dimension::Id::HeightAboveGround, ngIdx[i], z0 - z1);
}
// Final pass: Ensure that all ground points have height value pegged at 0.
for (auto const& i : gIdx)
view.setField(Dimension::Id::HeightAboveGround, i, 0.0);
}