SliceO_Frame::Inf_2

This method enable you to convert coordinates in "Inf" space to coordinates in "Frm" space.

Syntax

Point_2D Inf_2_Frm(

SliceO_Window * window,

Point_2D pos_inf

) ;

Region_2D Inf_2_Frm(

SliceO_Window * window,

Region_2D reg_inf

) ;

Parameters

window

Pointer to the window used for the conversion.

pos_inf

2D point to convert from "Inf" space to "Frm" space.

reg_inf

2D region to convert from "Inf" space to "Frm" space.

Return value

This method return either a transformed 2D point or a 2D region depending on its arguments.

Remarks

The transformation is computed by:

·Subtracting the origin of the frame in "Inf" space to the coordinates.

·Scaling each coordinates by the current scaling factor for the desired window.

·Scaling the "y" coordinate by the pixel aspect ratio.

// ----------------------------------------------------------------------------

// Inf_2_Frm()

// param: window (SliceO_Window *) the curent window

// pos_inf (Point_2D) The position in "Inf" space

// return: (Point_2D) new coord in "Frm" space

// ----------------------------------------------------------------------------

Point_2D SliceO_Frame::Inf_2_Frm( SliceO_Window *window, Point_2D pos_inf )

{

Region_2D reg_inf = Inside_Get( window ) ;

float x = pos_inf[0] ;

float y = pos_inf[1] ;

x -= reg_inf[0] ;

y -= reg_inf[1] ;

x /= m_scale[window->Id_Get()][window->Mode_Get()] ;

y /= m_scale[window->Id_Get()][window->Mode_Get()] * m_ratio ;

Point_2D pos_frm( COORD_FRM ) ;

pos_frm.Set( x, y ) ;

return( pos_frm ) ;

}

Requirements

Header:

sliceO_include.hpp

Library:

sliceO_Structures.lib

Example