obj.cpp

一个嵌入式系统的C代码

//***********************************************************************
//  MODULE : Obj - Class Body						*
//  AUTHOR : Ron Chernich						*
//  PURPOSE: Class supporting geometric objects used by RCOS		*
//  HISTORY:								*
//   18-JAN-93	First (MSC/C++ 7.00) version				*
//***********************************************************************

#include "obj.hpp"


/////////////
// very simple little 'critta makes no real assumptions about anything
//
point::point (INT16 n1, INT16 n2)
{
  x = n1, y = n2;
}

///////////////
// Assignment operator
//
point& point::operator = (point &pt)
{
  x = pt.x, y = pt.y;
  return *this;
}

//////////////
// assuming THIS (lvalue) is the origin,
// RETURNS: TRUE  .. point lies in second quadrent or on an axis boundary
//	    FALSE .. point (rvalue) lies inside other three quadrents
//
BOOL point::operator >= (point &pt)
{
  return (BOOL)((x >= pt.x) && (y >= pt.y));
}

//////////////
// assuming THIS (lvalue) is the origin,
// RETURNS: TRUE  .. point on bounding axis or inside quadrents 1, 3 or 4
//	    FALSE .. point (rvalue) lies inside second quadrent
//
BOOL point::operator <= (point &pt)
{
  return (BOOL)((x <= pt.x) && (y <= pt.y));
}



void point::MovePt (INT16 n1, INT16 n2)
{
  x = n1, y = n2;
}


///////////////////
// Rectangle constructors with args..
//
rect::rect (point &pt1, point &pt2)
{

  ul = pt1, lr = pt2;
}

rect::rect (point &pt1, INT16 n1, INT16 n2)
{
  point pt2(n1, n2);

  ul = pt1, lr = pt2;
}

rect::rect (INT16 n1, INT16 n2, INT16 n3, INT16 n4)
{
  point pt1(n1, n2), pt2(n3, n4);

  ul = pt1, lr = pt2;
}

///////////////////
// RETURNS: TRUE if passed point is within the rectangle
//
BOOL rect::InRect (point &pt)
{

  return (BOOL)((pt >= ul) && (pt <= lr));
}

/************************************ EOF ********************************/