TransformCoord2D Class Reference

#include <coord2d.hpp>

Public Member Functions
	TransformCoord2D ()
	TransformCoord2D (double x0, double y0, double angle)
	TransformCoord2D (double x0, double y0, double x1, double y1)
void	transform (double x, double y, double &x1, double &y1) const
double	transformX (double x, double y) const
double	transformY (double x, double y) const
void	transformBack (double x1, double y1, double &x, double &y) const

Protected Attributes
double	m_fA [2][2]
double	m_fX0
double	m_fY0

Detailed Description

Class for transformation of 2D coordinates from one cordinate system to another.

    y
y'   ^   x'
\    |  /
  \  | /
    \|/)angle

---—+-----—> 0 x

On the picture x0=0 and y0=0.

Transformation is performed by next rule: x' = A[0][0] * (x - x0) + A[0][1] * (y - y0) y' = A[1][0] * (x - x0) + A[1][1] * (y - y0) where A[0][0] = cos(angle) A[0][1] = sin(angle) A[1][0] = - sin(angle) A[1][1] = cos(angle)

Constructor & Destructor Documentation

TransformCoord2D::TransformCoord2D

(

)

Default coordinate system: (0,0) origin point; 0 angle.

TransformCoord2D::TransformCoord2D	(	double	x0,
		double	y0,
		double	angle
	)

Custom coordinate system x'0y' which is destination of transformation. x0, y0 is a coordinates of origin of destination coordinate system in source one. Angle is in radians.

TransformCoord2D::TransformCoord2D	(	double	x0,
		double	y0,
		double	x1,
		double	y1
	)

Custom coordinate system x'0y' which is destination of transformation. x0, y0 is a coordinates of origin of destination coordinate system in source one. x1, y1 is a direction of x' from x0, y0.

Member Function Documentation

void TransformCoord2D::transform	(	double	x,
		double	y,
		double &	x1,
		double &	y1
	)		const

Main transformation procedure: x and y are in source coordinate system and x1, y1 are in destination coordinate system.

void TransformCoord2D::transformBack	(	double	x1,
		double	y1,
		double &	x,
		double &	y
	)		const

Reverse transformation procedure: x and y are in destination coordinate system and x1, y1 are in source coordinate system.

double TransformCoord2D::transformX	(	double	x,
		double	y
	)		const

Obtain x1 after transformation.

double TransformCoord2D::transformY	(	double	x,
		double	y
	)		const

Obtain y1 after transformation.

Member Data Documentation

double TransformCoord2D::m_fA[2][2]

protected

Transformation matrix.

double TransformCoord2D::m_fX0

protected

Origin of destination coordinate system in source one.

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

• /net/opt/univers/ubp-i-15.3-centos7-x64.urij/include/mth/coord2d.hpp