IsoContours uses a fast datastructure to compute intersections of horizontal planes with a given list of triangles. More...

#include <IsoContours.h>

Public Member Functions
	IsoContours (std::vector< Point2 > &vCorners, const Vector2 &dirVec)

	IsoContours (std::vector< Triangle2 * > &vTriangles)

bool	getContours (double height, std::vector< std::vector< Segment2 > > &vvContours, bool bVerbose, bool bAutoPerturbate=true)

double	getMaxHeight ()

double	getMinHeight ()

void	getProfile (const Point2 &p, std::vector< Segment2 > &vSegmentsOut)

Protected Member Functions
	IsoContours (const IsoContours &other)

IsoContours &	operator= (const IsoContours &other)

Protected Attributes
std::vector< Triangle2 * >	vTriangles

Detailed Description

See also: http://www.geom.at/terrain-triangulation/

Constructor & Destructor Documentation

◆ IsoContours()

GEOM_FADE25D::IsoContours::IsoContours	(	std::vector< Point2 > &	vCorners,
		const Vector2 &	dirVec
	)

Experimental feature

IsoContours can be used to create profiles (slices).

Parameters

vCorners	contains 3*n points to specify n triangles, i.e. it is a corners-list where 3 subsequent points define a triangle.
dirVec	specifies the slice direction to compute profiles

Member Function Documentation

◆ getContours()

bool GEOM_FADE25D::IsoContours::getContours	(	double	height,
		std::vector< std::vector< Segment2 > > &	vvContours,
		bool	bVerbose,
		bool	bAutoPerturbate = `true`
	)

Get Contours

Computes the intersection of a horizontal plane at a certain height with all triangles and returns a vector of assembled polygons and polylines. The method works only for height values that do not occur as heights of any of the vertices. It returns false in such as case except bAutoPerturbate=true. In this case a tiny offset is automatically added to height.

Note: Polylines that end in the middle of a terrain can not exist and if you see such lines in the output then these are not only individual line segments but extremely narrow polygons - enforced by your geometric setting. You can numerically inspect those lines to verify that.

◆ getMaxHeight()

double GEOM_FADE25D::IsoContours::getMaxHeight ( )

The the maximum height

Returns the largest z-coordinate

◆ getMinHeight()

double GEOM_FADE25D::IsoContours::getMinHeight ( )

Get the minimum height

Returns the smallest z coordinate

◆ getProfile()

void GEOM_FADE25D::IsoContours::getProfile	(	const Point2 &	p,
		std::vector< Segment2 > &	vSegmentsOut
	)

Get Profile

This is a new method to compute profiles i.e., to produce slices orthogonal to a direction specified in the constructor IsoContours(std::vector<Point2>& vCorners,const Vector2& dirVec)

The documentation for this class was generated from the following file:

IsoContours.h

Public Member Functions

Protected Member Functions

Protected Attributes