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CGAL::grid_simplify_point_set

Definition

Function CGAL::grid_simplify_point_set() considers a regular grid covering the bounding box of the input point set, and clusters all points sharing the same cell of the grid by picking as representant one arbitrarily chosen point.

This method modifies the order of input points so as to pack all remaining points first, and returns and returns an iterator over the first point to remove (see erase-remove idiom). For this reason it should not be called on sorted containers.

#include <CGAL/grid_simplify_point_set.h>

template<typename ForwardIterator, typename PointPMap, typename Kernel>
ForwardIterator
grid_simplify_point_set ( ForwardIterator first,
ForwardIterator beyond,
PointPMap point_pmap,
double epsilon,
Kernel kernel)
Merges points which belong to the same cell of a grid of cell size = epsilon.
This method modifies the order of input points so as to pack all remaining points first, and returns an iterator over the first point to remove (see erase-remove idiom). For this reason it should not be called on sorted containers.
Precondition: epsilon > 0.
Template Parameters: 
ForwardIterator: iterator over input points. PointPMap: is a model of boost::ReadablePropertyMap with a value_type = Point_3<Kernel>. It can be omitted if ForwardIterator value_type is convertible to Point_3<Kernel>. Kernel: Geometric traits class. It can be omitted and deduced automatically from PointPMap value_type.
Returns:  iterator over the first point to remove.
Parameters: 
first: iterator over the first input point. beyond: past-the-end iterator over the input points. point_pmap: property map ForwardIterator -> Point_3. epsilon: tolerance value when merging 3D points. kernel: geometric traits.

See Also

CGAL::random_simplify_point_set

Example

See grid_simplification_example.cpp.

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CGAL Open Source Project. Release 3.5. 1 October 2009.