aoishifter.h

BCAM 1394 Driver

//-----------------------------------------------------------------------------
//  (c) 2002 by Basler Vision Technologies
//  Section:  Vision Components
//  Project:  BCAM
//  $Header: AoiShifter.h, 3, 19.09.2002 15:16:08, Nebelung, H.$
//-----------------------------------------------------------------------------
/**
  \file     AoiShifter.h
  \brief    moves the area of interest around
 */


#pragma once


//! Computes the position of the AOI so that it bounces around
class CAoiBouncer
{
public:
  //! Default Constructor
  CAoiBouncer()
  {
  }
  
  //! Initlaizes the object
  void Initialize(        
    CSize ImagerSize,       //!< Size of the imager
    CSize AoiSize,          //!< Size of the AOI
    CPoint Start,           //!< Start point for the upper left corner of the AOI
    CPoint Speed            //!< Speed vector
    ) 
  {
    m_ImagerSize = ImagerSize;
    m_AoiSize = AoiSize;
    m_Start = Start;
    m_Speed = Speed;
  }
  
  //! Computes the AOI postition at a given cycle count value
  void GetAoiPosition(unsigned long CycleCount, CPoint &AoiPosition)
  {
    /** Deal with the x-coordinate **/
    
    // x = x0 + v * t
    AoiPosition.x = m_Start.x + m_Speed.x * CycleCount;                                             
    
    // limit to 2 x imager width
    AoiPosition.x = AoiPosition.x % (2 * (m_ImagerSize.cx - m_AoiSize.cx)); 
    
    // Need to reeflect?
    if( AoiPosition.x > (m_ImagerSize.cx - m_AoiSize.cx) )
      AoiPosition.x = 2 * (m_ImagerSize.cx - m_AoiSize.cx) - AoiPosition.x;
    
    /** Deal with the y-coordinate **/
    
    // y = y0 + v * t
    AoiPosition.y = m_Start.y + m_Speed.y * CycleCount;                                             
    
    // limit to 2 x imager height
    AoiPosition.y = AoiPosition.y % (2 * (m_ImagerSize.cy - m_AoiSize.cy)); 
    
    // Need to reeflect?
    if( AoiPosition.y > (m_ImagerSize.cy - m_AoiSize.cy) )
      AoiPosition.y = 2 * (m_ImagerSize.cy - m_AoiSize.cy) - AoiPosition.y;
    
  }
  
protected:
  //! The size of the Imager
  CSize m_ImagerSize;
  
  //! The size of the AOI
  CSize m_AoiSize;
  
  //! The Start point for the upper left corner of the AOI
  CPoint m_Start;
  
  //! The Speed vector
  CPoint m_Speed;
};