Conways Game of Life Source code

G

Gina

I need to add the cell generation to a templated program. I am using
graphics magician, but my problem is with the math. I cannot figure
out my cell generations. I do know that I need two different arrays.
One array is the original grid, and one is the copy of that grid.
But, I am stuck..here is my code, if anyone could please help me I
would greatly appreciate it.
// John Horton Conway's "Game of Life"
Click to expand...

#include "GraphicsMagician.h"
#include "GMDefines.h"
#include <stdlib.h>
#include <time.h>
GMMachine Machine;

const int MAXX = 47; // Largest x cell
const int MAXY = 47; // Largest y cell
const int PIXSIZE = 10; // the size of each life cell
const int GENTIME = 30; // the time between generations (1/30 of a
second ticks)
const int DEBOUNCETIME = 5; // time to wait before accepting
another mouse click

int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR
lpCmdLine, int nWinMode)
{
if (Machine.Start("Life", hInst, nWinMode))
try
{
int media[MAXX][MAXY] = {0}; // the media that the cells grow in
int x=0,y=0; // cursor coordinates
int x1, y1; // cursor coordinates converted to cell coordinated
int gen = 0; // the current generation
int sim = 0; // are we simulating? 0=no, 1=yes
int genTimer = 0; // how long until the next generation
int deBounceR=0; // how long to wait before accepting another
right mouse click
int deBounceL=0; // how long to wait before accepting another
left mouse click
int i,j; // loop counters

// this function calculates the next generation from the current one
void nextgen(int media[MAXX][MAXY]);

Machine.DrawOnHiddenScreen(); // we draw on the hidden screen
and then display it at the end

Machine.TextColor(RGB(0,255,0)); // yellow text

while (Machine.Active())
{
// compute the new x,y coordinates from the mouse inputs
x += Machine.Mouse.x;
y += Machine.Mouse.y;

// draw grid
Machine.ClearScreen(Machine.Black);
for (i=0; i<=MAXX; i++)
Machine.Line(i*PIXSIZE, 0, i*PIXSIZE, MAXY*PIXSIZE, Machine.Red);
for (i=0; i<=MAXY; i++)
Machine.Line(0, i*PIXSIZE, MAXX*PIXSIZE, i*PIXSIZE, Machine.Red);

// display life
for (i=0; i<MAXX; i++)
for (j=0; j<MAXY; j++)
if (media[j] > 0)
Machine.Rectangle(i*PIXSIZE+1, j*PIXSIZE+1, i*PIXSIZE+PIXSIZE,
j*PIXSIZE+PIXSIZE, gmFILL, Machine.Violet);

// display cursor
if (x<0) x=0; // first make sure the cursor does not go off of
the screen
if (x>639) x=639;
if (y<0) y=0;
if (y>479) x=479;
Machine.Circle(x,y,PIXSIZE/2-1,gmFILL, Machine.Violet); //put up
cursor


if (sim == 1) // if the simulation is active
{
// check for next generation
if (genTimer <= 0) // if we are done waiting
{
genTimer = GENTIME; // reset timer
gen++; // move to next generation
nextgen(media);
}
else
{
genTimer--; // keep waiting
}
}

// display status
gotoxy(500,10);
cout << "Generation: " << gen;
gotoxy(500,35);
cout << "Simulating: " << sim;

// handle left mouse click (set cell status)
if (deBounceL>0) deBounceL--; // count down the debounce timer
if(Machine.MouseLeftButton && deBounceL == 0) // if the button is
down and the timer has expired
{
x1 = x/PIXSIZE; // calculate the cell that the mouse is
over
y1 = y/PIXSIZE;
if (x1 >= 0 && x1 < MAXX && y1 >= 0 && y1 < MAXY) // if it is on
the media
{
if (media[x1][y1] == 0) // flip the status of the cell
media[x1][y1] = 1;
else
media[x1][y1] = 0;
}
deBounceL = DEBOUNCETIME; // start the debounce timer
}

// handle left mouse click (start or stop simulation)
if (deBounceR>0) deBounceR--; // count down the debounce timer
if(Machine.MouseRightButton && deBounceR == 0)// if the button is
down and the timer has expired
{
if (sim == 0) // flip the status of the simulation
sim = 1;
else
sim = 0;
deBounceR = DEBOUNCETIME; // start the debounce timer
}

// display the new screen
Machine.FlipTimed();

}
}
catch (GMExit){};
return Machine.ReturnValue;
}

// this function calculates the next generation from the current one
void nextgen(int media[MAXX][MAXY])
{
int i,j,n/*number of neighbors*/,x1,y1;
int oldmedia[MAXX][MAXY];


oldmedia[MAXX][MAXY]=media[MAXX][MAXY]=0;
for (i=0; i<MAXX; ++i)
for (j=0; j<MAXY; ++j)

{
n = 0;
for (x1=i-1; x1<=i+1; ++x1)
for (y1=j-1; y1<=j+1; ++y1)
n = n + oldmedia[x1][y1];
n = n - oldmedia[j];

if ((oldmedia[j]==0) && (n==3) || (oldmedia[j]==1) &&
((n==2) || (n==3)))
media[j] = 1;
else
media[j] = 0;

for (i=0; i<MAXX; ++i)
for (j=0; j<MAXY; ++j)
oldmedia[j] = media[j];



}

}
 
H

Hendrik Belitz

Gina said:
I need to add the cell generation to a templated program. I am using
graphics magician, but my problem is with the math.
Click to expand...

Math? There's only one function in the whole model, and that's already
implemented in your source code as far as I can see.
I cannot figure
out my cell generations. I do know that I need two different arrays.
One array is the original grid, and one is the copy of that grid.
But, I am stuck..
Click to expand...

COuld you please describe your problem in more detail. If you don't know
why you need two grids, thats quite simple: One grid stores the current
generation T, and the other one is used to store the generation T+1. You
can't simply overwrite the T generation, since you need the data there to
compute the future generation.

To get a further introduction to Conways Life, try posting this again at
comp.ai.alife
// John Horton Conway's "Game of Life"
Click to expand...

#include "GraphicsMagician.h"
#include "GMDefines.h"
#include <stdlib.h>
#include <time.h>
GMMachine Machine;

const int MAXX = 47; // Largest x cell
const int MAXY = 47; // Largest y cell
const int PIXSIZE = 10; // the size of each life cell
const int GENTIME = 30; // the time between generations (1/30 of a
second ticks)
const int DEBOUNCETIME = 5; // time to wait before accepting
another mouse click

int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR
lpCmdLine, int nWinMode)
{
if (Machine.Start("Life", hInst, nWinMode))
try
{
int media[MAXX][MAXY] = {0}; // the media that the cells grow in
int x=0,y=0; // cursor coordinates
int x1, y1; // cursor coordinates converted to cell coordinated
int gen = 0; // the current generation
int sim = 0; // are we simulating? 0=no, 1=yes
int genTimer = 0; // how long until the next generation
int deBounceR=0; // how long to wait before accepting another
right mouse click
int deBounceL=0; // how long to wait before accepting another
left mouse click
int i,j; // loop counters

// this function calculates the next generation from the current one
void nextgen(int media[MAXX][MAXY]);

Machine.DrawOnHiddenScreen(); // we draw on the hidden screen
and then display it at the end

Machine.TextColor(RGB(0,255,0)); // yellow text

while (Machine.Active())
{
// compute the new x,y coordinates from the mouse inputs
x += Machine.Mouse.x;
y += Machine.Mouse.y;

// draw grid
Machine.ClearScreen(Machine.Black);
for (i=0; i<=MAXX; i++)
Machine.Line(i*PIXSIZE, 0, i*PIXSIZE, MAXY*PIXSIZE, Machine.Red);
for (i=0; i<=MAXY; i++)
Machine.Line(0, i*PIXSIZE, MAXX*PIXSIZE, i*PIXSIZE, Machine.Red);

// display life
for (i=0; i<MAXX; i++)
for (j=0; j<MAXY; j++)
if (media[j] > 0)
Machine.Rectangle(i*PIXSIZE+1, j*PIXSIZE+1, i*PIXSIZE+PIXSIZE,
j*PIXSIZE+PIXSIZE, gmFILL, Machine.Violet);

// display cursor
if (x<0) x=0; // first make sure the cursor does not go off of
the screen
if (x>639) x=639;
if (y<0) y=0;
if (y>479) x=479;
Machine.Circle(x,y,PIXSIZE/2-1,gmFILL, Machine.Violet); //put up
cursor


if (sim == 1) // if the simulation is active
{
// check for next generation
if (genTimer <= 0) // if we are done waiting
{
genTimer = GENTIME; // reset timer
gen++; // move to next generation
nextgen(media);
}
else
{
genTimer--; // keep waiting
}
}

// display status
gotoxy(500,10);
cout << "Generation: " << gen;
gotoxy(500,35);
cout << "Simulating: " << sim;

// handle left mouse click (set cell status)
if (deBounceL>0) deBounceL--; // count down the debounce timer
if(Machine.MouseLeftButton && deBounceL == 0) // if the button is
down and the timer has expired
{
x1 = x/PIXSIZE; // calculate the cell that the mouse is
over
y1 = y/PIXSIZE;
if (x1 >= 0 && x1 < MAXX && y1 >= 0 && y1 < MAXY) // if it is on
the media
{
if (media[x1][y1] == 0) // flip the status of the cell
media[x1][y1] = 1;
else
media[x1][y1] = 0;
}
deBounceL = DEBOUNCETIME; // start the debounce timer
}

// handle left mouse click (start or stop simulation)
if (deBounceR>0) deBounceR--; // count down the debounce timer
if(Machine.MouseRightButton && deBounceR == 0)// if the button is
down and the timer has expired
{
if (sim == 0) // flip the status of the simulation
sim = 1;
else
sim = 0;
deBounceR = DEBOUNCETIME; // start the debounce timer
}

// display the new screen
Machine.FlipTimed();

}
}
catch (GMExit){};
return Machine.ReturnValue;
}

// this function calculates the next generation from the current one
void nextgen(int media[MAXX][MAXY])
{
int i,j,n/*number of neighbors*/,x1,y1;
int oldmedia[MAXX][MAXY];


oldmedia[MAXX][MAXY]=media[MAXX][MAXY]=0;
for (i=0; i<MAXX; ++i)
for (j=0; j<MAXY; ++j)

{
n = 0;
for (x1=i-1; x1<=i+1; ++x1)
for (y1=j-1; y1<=j+1; ++y1)
n = n + oldmedia[x1][y1];
n = n - oldmedia[j];

if ((oldmedia[j]==0) && (n==3) || (oldmedia[j]==1) &&
((n==2) || (n==3)))
media[j] = 1;
else
media[j] = 0;

for (i=0; i<MAXX; ++i)
for (j=0; j<MAXY; ++j)
oldmedia[j] = media[j];



}

}
Click to expand...
 

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