Creates a TIN using Delaunay refinement algorithm. More...

#include <tin_creation_remeshing_strategy.h>

Inheritance diagram for TinCreation::TinCreationRemeshingStrategy:

Public Member Functions
	TinCreationRemeshingStrategy (double facetDistance, double facetAngle, double facetSize, double edgeSize)

	TinCreationRemeshingStrategy (const std::vector< double > &facetDistance, double facetAngle, const std::vector< double > &facetSize, const std::vector< double > &edgeSize)

Polyhedron	create (const std::vector< Point_3 > &dataPts, const bool &constrainEasternVertices, const bool &constrainWesternVertices, const bool &constrainNorthernVertices, const bool &constrainSouthernVertices)
	Create a TIN from a set of points. More...

void	setParamsForZoom (const unsigned int &zoom)
	Adapts the parameters of the algorithm for the desired zoom level. More...

Public Member Functions inherited from TinCreation::TinCreationStrategy
	TinCreationStrategy ()
	Constructor.

void	setScaleZ (const double &scale)

double	getScaleZ ()
	Get the scale in Z.

void	setBounds (const double &minX, const double &minY, const double &minZ, const double &maxX, const double &maxY, const double &maxZ)

double	getMinX () const
	Get the minimum X coordinate.

double	getMinY () const
	Get the minimum Y coordinate.

double	getMinZ () const
	Get the minimum Z coordinate.

double	getMaxX () const
	Get the maximum X coordinate.

double	getMaxY () const
	Get the maximum Y coordinate.

double	getMaxZ () const
	Get the maximum Z coordinate.

bool	hasOriginalBoundingBox () const

std::vector< Point_3 >	convertUVHToECEF (const std::vector< Point_3 > &pts) const
	Convert points to ECEF assuming that they are on a UVH format, and given the limits of the tile.

std::vector< Point_3 >	convertECEFToUVH (const std::vector< Point_3 > &pts) const
	Convert points from local UVH to ECEF given the limits of the tile.

Point_3	convertUVHToECEF (const Point_3 &p) const
	Convert points to ECEF assuming that they are on a UVH format, and given the limits of the tile.

Point_3	convertECEFToUVH (const Point_3 &p) const
	Convert points from local UVH to ECEF given the limits of the tile.

Detailed Description

Creates a TIN using Delaunay refinement algorithm.

In fact, the method used in this class is not a simplification but a remeshing process.

Starting from a high resolution mesh, we obtain a new mesh following a set of requirements on the final mesh:

facet_distance: Upper bound for the distance between the facet circumcenter and the center of its surface Delaunay ball (i.e., approximation accuracy)
facet_angle: Lower bound for the angles (in degrees) of the surface mesh facets
facet_size: Upper bound for the radii of the surface Delaunay balls
edge_size: Upper bound for the lengths of the boundary edges

When the simplification takes place, all the coordinates of the vertices are normalized between 0..1 Note that this also means that, if the parameters are not set wisely, using this process we can get a mesh of even larger complexity with respect to the original one!

Member Function Documentation

◆ create()

Polyhedron TinCreation::TinCreationRemeshingStrategy::create	(	const std::vector< Point_3 > &	dataPts,
		const bool &	constrainEasternVertices,
		const bool &	constrainWesternVertices,
		const bool &	constrainNorthernVertices,
		const bool &	constrainSouthernVertices
	)

virtual

Create a TIN from a set of points.

While it does not impose any regularity on the input points, the use of constrain<X>Vertices is restricted to the shape of the convex hull of the input point being an axis-aligned rectangle.

Parameters

dataPts	Input 3D point set
constrainEasternVertices	Flag indicating whether the vertices on the eastern border of the tile should be preserved or not
constrainWesternVertices	Flag indicating whether the vertices on the western border of the tile should be preserved or not
constrainNorthernVertices	Flag indicating whether the vertices on the northern border of the tile should be preserved or not
constrainSouthernVertices	Flag indicating whether the vertices on the southern border of the tile should be preserved or not

Returns

Implements TinCreation::TinCreationStrategy.

◆ setParamsForZoom()

void TinCreation::TinCreationRemeshingStrategy::setParamsForZoom ( const unsigned int & zoom )

inlinevirtual

Adapts the parameters of the algorithm for the desired zoom level.

For further information, see the parameters' setting mechanism in the tutorial.