I/O Functions

Functions
template<typename OutputIteratorValueType , typename PointOutputIterator , typename NamedParameters = parameters::Default_named_parameters>
bool	CGAL::IO::read_points (const std::string &fname, PointOutputIterator output, const NamedParameters &np=parameters::default_values())
	reads the point set from an input file.
template<typename PointRange , typename NamedParameters = CGAL::parameters::Default_named_parameters>
bool	CGAL::IO::write_points (const std::string &fname, const PointRange &points, const NamedParameters &np=parameters::default_values(),)
	writes the range of points with properties to a file.

Function Documentation

read_points()

template<typename OutputIteratorValueType , typename PointOutputIterator , typename NamedParameters = parameters::Default_named_parameters>

bool CGAL::IO::read_points	(	const std::string &	fname,
		PointOutputIterator	output,
		const NamedParameters &	np = parameters::default_values()
	)

#include <CGAL/IO/read_points.h>

reads the point set from an input file.

Supported file formats are the following:

• Object File Format (OFF) (.off)
• Polygon File Format (PLY) (.ply)
• LAS (Lidar) File Format (.las)
• XYZ File Format (.xyz)

The format is detected from the filename extension (letter case is not important).

Template Parameters

OutputIteratorValueType	type of objects that can be put in PointOutputIterator. It must be a model of DefaultConstructible and defaults to value_type_traits<PointOutputIterator>::type. It can be omitted when the default is fine.
PointOutputIterator	iterator over output points.
NamedParameters	a sequence of Named Parameters

Parameters

fname	the name of the input file.
output	output iterator over points.
np	optional sequence of Named Parameters among the ones listed below.

Optional Named Parameters

point_map a property map associating points to the elements of the point range Type: a model of WritablePropertyMap with value type geom_traits::Point_3 Default: CGAL::Identity_property_map<geom_traits::Point_3>
normal_map a property map associating normals to the elements of the point range Type: a model of WritablePropertyMap with value type geom_traits::Vector_3 Default: If this parameter is omitted, normals in the input stream are ignored.
geom_traits an instance of a geometric traits class Type: a model of Kernel Default: a CGAL Kernel deduced from the point type, using CGAL::Kernel_traits
use_binary_mode indicates whether data should be read in binary (true) or in ASCII (false) Type: Boolean Default: true Extra: This parameter is only relevant for PLY reading: the OFF and XYZ formats are always ASCII, and the LAS format is always binary.

Returns

true if reading was successful, false otherwise.

Examples

Point_set_processing_3/average_spacing_example.cpp, Point_set_processing_3/bilateral_smooth_point_set_example.cpp, Point_set_processing_3/edge_aware_upsample_point_set_example.cpp, Point_set_processing_3/edges_example.cpp, Point_set_processing_3/grid_simplification_example.cpp, Point_set_processing_3/hierarchy_simplification_example.cpp, Point_set_processing_3/normals_example.cpp, Point_set_processing_3/registration_with_OpenGR.cpp, Point_set_processing_3/registration_with_opengr_pointmatcher_pipeline.cpp, Point_set_processing_3/registration_with_pointmatcher.cpp, Point_set_processing_3/remove_outliers_example.cpp, Point_set_processing_3/scale_estimation_example.cpp, Point_set_processing_3/structuring_example.cpp, and Point_set_processing_3/wlop_simplify_and_regularize_point_set_example.cpp.

write_points()

template<typename PointRange , typename NamedParameters = CGAL::parameters::Default_named_parameters>

bool CGAL::IO::write_points	(	const std::string &	fname,
		const PointRange &	points,
		const NamedParameters &	np = parameters::default_values()
	)

#include <CGAL/IO/write_points.h>

writes the range of points with properties to a file.

Supported file formats are the following:

• Object File Format (OFF) (.off)
• Polygon File Format (PLY) (.ply)
• LAS (Lidar) File Format (.las)
• XYZ File Format (.xyz)

The format is detected from the filename extension (letter case is not important).

Template Parameters

PointRange	is a model of ConstRange. The value type of its iterator is the key type of the named parameter point_map.
NamedParameters	a sequence of Named Parameters

Parameters

fname	the name of the output file.
points	the range of points that will be written.
np	optional sequence of Named Parameters among the ones listed below.

Optional Named Parameters

point_map a property map associating points to the elements of the point range Type: a model of ReadablePropertyMap with value type geom_traits::Point_3 Default: CGAL::Identity_property_map<geom_traits::Point_3>
normal_map a property map associating normals to the elements of the point range Type: a model of ReadablePropertyMap with value type geom_traits::Vector_3 Default: If this parameter is omitted, normals are not written in the output file.
geom_traits an instance of a geometric traits class Type: a model of Kernel Default: a CGAL Kernel deduced from the point type, using CGAL::Kernel_traits
use_binary_mode indicates whether data should be written in binary (true) or in ASCII (false) Type: Boolean Default: true Extra: This parameter is only relevant for PLY writing: the OFF and XYZ formats are always ASCII, and the LAS format is always binary.
stream_precision a parameter used to set the precision (i.e. how many digits are generated) of the output stream Type: int Default: 6 Extra: This parameter is only meaningful while using ASCII encoding.

Returns

true if writing was successful, false otherwise.

Examples

Point_set_processing_3/edge_aware_upsample_point_set_example.cpp, Point_set_processing_3/hierarchy_simplification_example.cpp, Point_set_processing_3/registration_with_OpenGR.cpp, Point_set_processing_3/registration_with_opengr_pointmatcher_pipeline.cpp, Point_set_processing_3/registration_with_pointmatcher.cpp, Point_set_processing_3/structuring_example.cpp, and Point_set_processing_3/wlop_simplify_and_regularize_point_set_example.cpp.