MovementMap16 Class Reference

Movement maps are used for rapid computing of animal movement. More...

#include <MovementMap.h>

Public Member Functions
void	ClearMapValue (unsigned x, unsigned y)
int	GetMapValue (unsigned x, unsigned y)
	MovementMap16 (Landscape *L)
void	SetMapValue (unsigned x, unsigned y, unsigned value)
	~MovementMap16 ()

Public Attributes
uint32 *	m_TheMap
uint32	maxx
uint32	maxy

Protected Member Functions
void	Init ()

Protected Attributes
Landscape *	m_ALandscape

Detailed Description

Movement maps are used for rapid computing of animal movement.

Constructor & Destructor Documentation

MovementMap16::MovementMap16

(

Landscape *

L

)

References MovementMap::Init(), MovementMap::m_ALandscape, MovementMap::m_TheMap, MovementMap::maxx, MovementMap::maxy, Landscape::SupplySimAreaHeight(), and Landscape::SupplySimAreaWidth().

{
  m_ALandscape = L;
  // must make sure that we have whole words
  maxx=(m_ALandscape->SupplySimAreaWidth()+1)/2;
  maxy=m_ALandscape->SupplySimAreaHeight();
  m_TheMap = new uint32[ maxx*maxy ];

  Init();
}

MovementMap16::~MovementMap16

(

)

References MovementMap::m_TheMap.

{
  delete m_TheMap;
}

Member Function Documentation

void MovementMap16::ClearMapValue	(	unsigned	x,
		unsigned	y
	)

References MovementMap::m_TheMap, and MovementMap::maxx.

{
  uint32 theWord=x & 1; // is the last bit set?
  theWord=theWord<<4; // Multiply by 16
  // divide by 2
  uint32 index= (x>>1)+(y*maxx); // y and x/2
  m_TheMap[index]  &= ~(0xFFFF<< theWord);
}

int MovementMap16::GetMapValue	(	unsigned	x,
		unsigned	y
	)

References MovementMap::m_TheMap, and MovementMap::maxx.

{
  uint32 theWord=x & 1;
  // Multiply by 16
  theWord=theWord<<4;
  // divide by 16
  uint32 index= (x>>1)+(maxx*y);
  return ((m_TheMap[index] >> theWord) & 0xFFFF); //
}

void MovementMap16::Init ( )

protected

References MovementMap::m_ALandscape, MovementMap::SetMapValue(), Landscape::SupplySimAreaHeight(), and Landscape::SupplySimAreaWidth().

{

  for (int y=0; y<m_ALandscape->SupplySimAreaHeight(); y++)
  {
    for (int x=0; x<m_ALandscape->SupplySimAreaWidth(); x++)
    {
      SetMapValue(x,y,0);
    }
  }
}

void MovementMap16::SetMapValue	(	unsigned	x,
		unsigned	y,
		unsigned	value
	)

References MovementMap::m_TheMap, and MovementMap::maxx.

{

  uint32 theWord= x & 1; // is the last bit set?

  // Multiply by 16o
  theWord=theWord<<4;

  // divide by 16
  // Calculate index:
  uint32 index= (x>>1)+(y*maxx);

  value &= 0xFF;
  uint32 NewVal = m_TheMap[index] & ~( 0xFFFF << theWord );
  m_TheMap[index] = NewVal | (value << theWord);

}

Member Data Documentation

Landscape* MovementMap16::m_ALandscape

protected

uint32* MovementMap16::m_TheMap

uint32 MovementMap16::maxx

uint32 MovementMap16::maxy

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

• MovementMap.h
• MovementMap.cpp