TYVisibilityCone.h File Reference

#include "Tympan/models/common/3d.h"
#include <gtest/gtest_prod.h>

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Classes
class	VisibilityCone

Functions
OVector3D	buildVector2D (const OPoint3D &pA2D, const OPoint3D &pB2D)
	Optimized way to build a vector in 2D (horizontal plane z = 0) from point A to B To use as a replacement of costly OVector3D::OVector3D(const OCoord3D&, const OCoord3D&) More...
bool	segmentIntersectsSemiLine2D (const OVector3D &vAB, const OVector3D &vMN, const OVector3D &vAM)
	Test if the segment [MN] intersects the semi-line [AB) in 2D (horizontal plane z = 0) More...
bool	solveLin2x2 (double a11, double a12, double a21, double a22, double b1, double b2, double &x1, double &x2)
	Solve a 2x2 linear system of equations Ax = b. More...

Function Documentation

buildVector2D()

OVector3D buildVector2D ( const OPoint3D &  pA2D, const OPoint3D &  pB2D  )

inline

Optimized way to build a vector in 2D (horizontal plane z = 0) from point A to B To use as a replacement of costly OVector3D::OVector3D(const OCoord3D&, const OCoord3D&)

Parameters

pA2D	A point (third coordinate is ignored)
pB2D	A point (third coordinate is ignored)

Returns

vector from A to B (third coordinate is 0)

Definition at line 92 of file TYVisibilityCone.h.

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segmentIntersectsSemiLine2D()

bool segmentIntersectsSemiLine2D	(	const OVector3D &	vAB,
		const OVector3D &	vMN,
		const OVector3D &	vAM
	)

Test if the segment [MN] intersects the semi-line [AB) in 2D (horizontal plane z = 0)

Parameters

vAB	AB vector (third coordinates are assumed to be 0)
vMN	MN vector (third coordinates are assumed to be 0)
vAM	AM vector (third coordinates are assumed to be 0)

Returns

true if [MN] intersects semi-line [AB) in 1 point, false otherwise

Definition at line 74 of file TYVisibilityCone.cpp.

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solveLin2x2()

bool solveLin2x2	(	double	a11,
		double	a12,
		double	a21,
		double	a22,
		double	b1,
		double	b2,
		double &	x1,
		double &	x2
	)

Solve a 2x2 linear system of equations Ax = b.

Parameters

[in]	a11	A_11 coefficient
[in]	a12	A_12 coefficient
[in]	a21	A_21 coefficient
[in]	a22	A_22 coefficient
[in]	b1	b_1 coefficient
[in]	b2	b_2 coefficient
[out]	x1	solution x_1
[out]	x2	solution x_2

Returns

true if there is a unique solution, false otherwise

Definition at line 92 of file TYVisibilityCone.cpp.

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