ga2dbinstrgenome.cpp

遗传算法工具箱C++

// $Header$
/* ----------------------------------------------------------------------------
  binstr2.C
  mbwall 19apr95
  Copyright (c) 1995 Massachusetts Institute of Technology
                     all rights reserved

 DESCRIPTION:
  Source file for the 2D binary string genome.  See the 1D genome for comments.
---------------------------------------------------------------------------- */
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include "gaerror.h"
#include "garandom.h"
#include "GA2DBinStrGenome.h"
#include "GAMask.h"

/* ----------------------------------------------------------------------------
   Genome class definition
---------------------------------------------------------------------------- */
GA2DBinaryStringGenome::
GA2DBinaryStringGenome(unsigned int width, unsigned int height, 
		       GAGenome::Evaluator f, void * u) :
GABinaryString(width*height),
GAGenome(DEFAULT_2DBINSTR_INITIALIZER,
	 DEFAULT_2DBINSTR_MUTATOR,
	 DEFAULT_2DBINSTR_COMPARATOR) {
  evaluator(f);
  userData(u);
  crossover(DEFAULT_2DBINSTR_CROSSOVER);
  nx=minX=maxX=0; ny=minY=maxY=0;
  resize(width, height);
}


GA2DBinaryStringGenome::
GA2DBinaryStringGenome(const GA2DBinaryStringGenome & orig) :
GABinaryString(orig.GABinaryString::size()),
GAGenome() {
  nx=minX=maxX=0; ny=minY=maxY=0;
  GA2DBinaryStringGenome::copy(orig);
}

GA2DBinaryStringGenome::~GA2DBinaryStringGenome() {
}

GAGenome *
GA2DBinaryStringGenome::clone(GAGenome::CloneMethod flag) const {
  GA2DBinaryStringGenome *cpy = new GA2DBinaryStringGenome(nx,ny);
  if(flag == CONTENTS){
    cpy->copy(*this);
  }
  else{
    cpy->GAGenome::copy(*this);
    cpy->minX = minX; cpy->minY = minY; 
    cpy->maxX = maxX; cpy->maxY = maxY; 
  }
  return cpy;
}

void
GA2DBinaryStringGenome::copy(const GAGenome & orig)
{
  if(&orig == this) return;
  const GA2DBinaryStringGenome* c =
    DYN_CAST(const GA2DBinaryStringGenome*, &orig);
  if(c) {
    GAGenome::copy(*c);
    GABinaryString::copy(*c);
    nx = c->nx; ny = c->ny; 
    minX = c->minX; minY = c->minY; 
    maxX = c->maxX; maxY = c->maxY;
  } 
}


int
GA2DBinaryStringGenome::resize(int w, int h)
{
  if((unsigned int)w == nx && (unsigned int)h == ny) return sz;

  if(w == GAGenome::ANY_SIZE)
    w = GARandomInt(minX, maxX);
  else if(w < 0)
    w = nx;		// do nothing
  else if(minX == maxX)
    minX=maxX = w;
  else{
    if(w < STA_CAST(int, minX)) w=minX;
    if(w > STA_CAST(int, maxX)) w=maxX;
  }

  if(h == GAGenome::ANY_SIZE)
    h = GARandomInt(minY, maxY);
  else if(h < 0)
    h = ny;		// do nothing
  else if(minY == maxY)
    minY=maxY = h;
  else{
    if(h < STA_CAST(int, minY)) h=minY;
    if(h > STA_CAST(int, maxY)) h=maxY;
  }

// Move the bits into the right position.  If we're smaller, then shift to
// the smaller size before we do the resize (the resize method maintains bit
// integrety).  If we're larger, do the move after the resize.  If we're the 
// same size the we don't do anything.  When we're adding more bits, the new
// bits get set randomly to 0 or 1.

  if(w < STA_CAST(int,nx)){
    int y=GAMin(STA_CAST(int,ny),h);
    for(int j=0; j<y; j++)
      GABinaryString::move(j*w,j*nx,w);
  }
  GABinaryString::resize(w*h);
  if(w > STA_CAST(int,nx)){		// adjust the existing chunks of bits
    int y=GAMin(STA_CAST(int,ny),h);
    for(int j=y-1; j>=0; j--){
      GABinaryString::move(j*w,j*nx,nx);
      for(int i=nx; i<w; i++)
	bit(j*w+i, GARandomBit());
    }
  }
  if(h > STA_CAST(int,ny)){		// change in height is always new bits
    for(int i=w*ny; i<w*h; i++)
      bit(i, GARandomBit());
  }

  nx = w; ny = h;
  _evaluated = gaFalse;
  return sz;
}


#ifdef GALIB_USE_STREAMS
int
GA2DBinaryStringGenome::read(STD_ISTREAM & is)
{
  static char c;
  unsigned int i=0, j=0;
  while(!is.fail() && !is.eof() && j < ny) {
    is >> c;
    if(isdigit(c)){
      gene(i, j, ((c == '0') ? 0 : 1));
      if(++i >= nx){		// ready for next row
	i=0;
	j++;
      }
    }
  }

  _evaluated = gaFalse;

  if(is.eof() && 
     ((j < ny) ||	     // didn't get some lines
      (i < nx && i != 0))){   // stopped early on a row
    GAErr(GA_LOC, className(), "read", gaErrUnexpectedEOF);
    is.clear(STD_IOS_BADBIT | is.rdstate());
    return 1;
  }

  return 0;
}


// Dump the digits to the stream with a newline between each row.  No newline
// at the end of the whole thing.
int
GA2DBinaryStringGenome::write(STD_OSTREAM & os) const 
{
  for(unsigned int j=0; j<ny; j++){
    for(unsigned int i=0; i<nx; i++)
      os << gene(i,j);
    os << "\n";
  }
  return 0;
}
#endif


int 
GA2DBinaryStringGenome::resizeBehaviour(GAGenome::Dimension which) const {
  int val = 0;
  if(which == WIDTH) {
    if(maxX == minX) val = FIXED_SIZE;
    else val = maxX;
  }
  else if(which == HEIGHT) {
    if(maxY == minY) val = FIXED_SIZE;
    else val = maxY;
  }
  return val;
}


int
GA2DBinaryStringGenome::
resizeBehaviour(Dimension which, unsigned int lower, unsigned int upper)
{
  if(upper < lower){
    GAErr(GA_LOC, className(), "resizeBehaviour", gaErrBadResizeBehaviour);
    return resizeBehaviour(which);
  }

  switch(which){
  case WIDTH:
    minX = lower; maxX = upper;
    if(nx > upper) resize(upper,ny);
    if(nx < lower) resize(lower,ny);
    break;

  case HEIGHT:
    minY = lower; maxY = upper;
    if(ny > upper) resize(nx,upper);
    if(ny < lower) resize(nx,lower);
    break;

  default:
    break;
  }

  return resizeBehaviour(which);
}


void
GA2DBinaryStringGenome::copy(const GA2DBinaryStringGenome & orig,
			     unsigned int r, unsigned int s,
			     unsigned int x, unsigned int y,
			     unsigned int w, unsigned int h)
{
  if(w == 0 || x >= orig.nx || r >= nx ||
     h == 0 || y >= orig.ny || s >= ny) return;
  if(x + w > orig.nx) w = orig.nx - x;
  if(y + h > orig.ny) h = orig.ny - y;
  if(r + w > nx) w = nx - r;
  if(s + h > ny) h = ny - s;

  for(unsigned int j=0; j<h; j++)
    GABinaryString::copy(orig, (s+j)*nx+r, (y+j)*orig.nx+x, w);
  _evaluated = gaFalse;
}


void
GA2DBinaryStringGenome::set(unsigned int x, unsigned int y,
			    unsigned int w, unsigned int h)
{
  if(x + w > nx) w = nx - x;
  if(y + h > ny) h = ny - y;

  for(unsigned int j=0; j<h; j++)
    GABinaryString::set((y+j)*nx+x, w);
  _evaluated = gaFalse;
}


void
GA2DBinaryStringGenome::unset(unsigned int x, unsigned int y,
			      unsigned int w, unsigned int h)
{
  if(x + w > nx) w = nx - x;
  if(y + h > ny) h = ny - y;

  for(unsigned int j=0; j<h; j++)
    GABinaryString::unset((y+j)*nx+x, w);
  _evaluated = gaFalse;
}


void
GA2DBinaryStringGenome::randomize(unsigned int x, unsigned int y,
				  unsigned int w, unsigned int h)
{
  if(x + w > nx) w = nx - x;
  if(y + h > ny) h = ny - y;

  for(unsigned int j=0; j<h; j++)
    GABinaryString::randomize((y+j)*nx+x, w);
  _evaluated = gaFalse;
}


void
GA2DBinaryStringGenome::move(unsigned int x, unsigned int y,
			     unsigned int srcx, unsigned int srcy,
			     unsigned int w, unsigned int h)
{
  if(srcx + w > nx) w = nx - srcx;
  if(x + w > nx) w = nx - x;
  if(srcy + h > ny) h = ny - srcy;
  if(y + h > ny) h = ny - y;

  if(srcy<y){
    for(int j=h-1; j>=0; j--)
      GABinaryString::move((y+j)*nx+x, (srcy+j)*nx+srcx, w);
  }
  else{
    for(unsigned int j=0; j<h; j++)
      GABinaryString::move((y+j)*nx+x, (srcy+j)*nx+srcx, w);
  }
  _evaluated = gaFalse;
}


int
GA2DBinaryStringGenome::equal(const GA2DBinaryStringGenome& orig,
			      unsigned int x, unsigned int y,
			      unsigned int srcx, unsigned int srcy,
			      unsigned int w, unsigned int h) const
{
  unsigned int eq = 0;
  for(unsigned int j=0; j<h; j++)
    eq += GABinaryString::equal(orig, (y+j)*nx+x, (srcy+j)*nx+srcx, w);
  return eq==h ? 1 : 0;
}


int 
GA2DBinaryStringGenome::equal(const GAGenome & c) const
{
  if(this == &c) return 1;
  GA2DBinaryStringGenome & b = (GA2DBinaryStringGenome &)c;
  if(nx != b.nx || ny != b.ny) return 0;
  int val=0;
  for(unsigned int j=0; j<ny && val==0; j++)
    val = GABinaryString::equal(b,j*nx,j*nx,nx) ? 0 : 1;
  return(val ? 0 : 1);
}







/* ----------------------------------------------------------------------------
   Operators
---------------------------------------------------------------------------- */
/* ----------------------------------------------------------------------------
2D Binary String Genome
  The order for looping through indices is height-then-width (ie height loops
before a single width increment)
---------------------------------------------------------------------------- */
void 
GA2DBinaryStringGenome::UniformInitializer(GAGenome & c)
{
  GA2DBinaryStringGenome &child=DYN_CAST(GA2DBinaryStringGenome &, c);
  child.resize(GAGenome::ANY_SIZE, GAGenome::ANY_SIZE);
  for(int i=child.width()-1; i>=0; i--)
    for(int j=child.height()-1; j>=0; j--)
      child.gene(i, j, GARandomBit());
}


void 
GA2DBinaryStringGenome::UnsetInitializer(GAGenome & c)
{
  GA2DBinaryStringGenome &child=DYN_CAST(GA2DBinaryStringGenome &, c);
  child.resize(GAGenome::ANY_SIZE, GAGenome::ANY_SIZE);
  child.unset(0, 0, child.width(), child.height());
}


void 
GA2DBinaryStringGenome::SetInitializer(GAGenome & c)
{
  GA2DBinaryStringGenome &child=DYN_CAST(GA2DBinaryStringGenome &, c);
  child.resize(GAGenome::ANY_SIZE, GAGenome::ANY_SIZE);	
  child.set(0, 0, child.width(), child.height());
}


int