static int i=50,xb=2000,ya=2025,xa=2200,yb=2025,xf,yf,outx=3900,outy=100,inx=3800,iny=200,w,p,r,t,key1=1000;

int static start=0;

int score=0,score1;

void * font1 = GLUT_BITMAP_HELVETICA_18;

void specialKeys( int key, int x, int y);

void show();

char ar1[10],*array;

void rt(int score);

void SetPixel(int px,int py)

{

glBegin(GL_POINTS);

glVertex2f(px,py);

glEnd();

}

void dda(float x0,float y0,float x1,float y1)

{

int steps,k=0;

float xinc,dx,dy,yinc,x,y;

dx=x1-x0;

dy=y1-y0;

x=x0;

y=y0;

if(abs(dx)>abs(dy))

steps=abs(dx);

else

steps=abs(dy);

xinc=(dx/steps);

yinc=(dy/steps);

SetPixel(round(x),round(y));

for(k=0;k<steps;k++)

{

x+=xinc;

y+=yinc;

SetPixel(round(x),round(y));

}

}

char* int_char()

{

int c=0,j=0,ai;

char ar[10];

score1=score;

if(score==0)

ar1[j++]=48;

else

{

while(score1!=0)

{

ar[c++]=((score1%10)+48);

score1=score1/10;

}

}

for(ai=c-1;ai>=0;ai--)

ar1[j++]=ar[ai];

ar1[j]='\0';

return ar1;

}

void renderBitmapString(float x, float y, void *font,const char *string){

const char *c;

glRasterPos2f(x, y);

for (c=string; *c != '\0'; c++) {

glutBitmapCharacter(font, *c);

}

}

void call3()

{

renderBitmapString(1600,3500,(void *)font1,"YOUR TOTAL SCORE IS : ");

array=int_char();

renderBitmapString(2400,3500,(void *)font1,array);

renderBitmapString(1600,3000,(void *)font1,"THANK YOU :)");

}

void pointsz(float size)

{

glEnable( GL_POINT_SMOOTH );

glEnable( GL_BLEND );

glBlendFunc( GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA );

glPointSize(size);

}

void food()

{

int f=1,g=1;

pointsz(6.0);

xf = rand() % 3500;

yf = rand() % 3500;//random food

while((f!=0) && (g!=0))

{

if(!(xf>iny-50 && xf<3800))

{

xf = rand() % 3500;

f=1;

}

else

f=0;

if(!(yf>iny && yf<inx))

{

yf = rand() % 3500;

g=1;

}

else

g=0;

}

SetPixel(xf,yf);

glEnd();

glFlush();

}

void view()

{

glClear(GL_COLOR_BUFFER_BIT);

pointsz(1.0);

glBegin(GL_POINTS);

dda(outx,outy,outx,outx);

dda(outy,outy,outy,outx);

dda(outy,outy,outx,outy);

dda(outy,outx,outx,outx);//outer border

dda(inx+50,inx,inx+50,iny);

dda(iny-50,inx,inx+50,inx);

dda(iny-50,iny,iny-50,inx);

dda(iny-50,iny,inx+50,iny);//inner border

glEnd();

}

void tailgrow(int foodx, int foody, int headx, int heady, int tailx, int taily)

{

if(headx == tailx)

{

if(heady > taily)

{

yb = yb -i;

}

else

{

yb = yb + i;

}

}

else if(heady == taily)

{

if( headx > tailx)

{

xb = xb-i;

}

else

{

xb = xb + i;

}

}

else

{

if(heady >= taily)

yb=yb-i;

else if(heady < taily)

yb=yb+i;

else if(headx > tailx)

xb = xb - i;

else if(headx < tailx)

xb = xb + i;

}

start=0;

}

void setup()

{

//sleep(1);

glColor3f(0.0,0.0,1.0);

pointsz(1.0);

view();

pointsz(6.0);

glColor3f(1.0,1.0,1.0);

glBegin(GL_POINTS);

SetPixel(xf,yf);

glFlush();

pointsz(4.0);

glBegin(GL_POINTS);

}

void motion()

{

if(key1==0)

{

while(t>r)

{

setup();

xa=xa+i;

dda(xa,ya,w,p);

if(p>yb)

{

yb=yb+i;

r=yb;

}

else

{

yb=yb-i;

t=yb;

}

dda(w,p,xb,yb);

if((((xf-20) <= xa) && ((xf +20) >= xa) && ((yf-20) <= ya) && ((yf +20) >= ya)))

{

score++;

tailgrow(xf,yf,xa,ya,xb,yb);

}

glEnd();

glFlush();

}

pointsz(1.0);

}

if( key1 == 3)

{

while(t>r)

{

setup();

ya=ya-i;

dda(xa,ya,w,p);

if(w>xb)

{

xb=xb+i;

r=xb;

}

else

{

xb=xb-i;

t=xb;

}

dda(w,p,xb,yb);

if((((xf-20) <= xa) && ((xf +20) >= xa) && ((yf-20) <= ya) && ((yf +20) >= ya)))

{

score++;

printf("%d\n",score);

tailgrow(xf,yf,xa,ya,xb,yb);

}

glEnd();

glFlush();

}

pointsz(1.0);

}

if(key1==1)

{

while(t>r)

{

setup();

xa=xa-i;

dda(xa,ya,w,p);

if(p>yb)

{

yb=yb+i;

r=yb;

}

else

{

yb=yb-i;

t=yb;

}

dda(w,p,xb,yb);

if((((xf-20) <= xa) && ((xf +20) >= xa) && ((yf-20) <= ya) && ((yf +20) >= ya)))

{

score++;

printf("%d\n",score);

tailgrow(xf,yf,xa,ya,xb,yb);

}

glEnd();

glFlush();

}

pointsz(1.0);

}

if(key1==2)

{

while(t>r)

{

setup();

ya=ya+i;

dda(xa,ya,w,p);

if(w>xb)

{

xb=xb+i;

r=xb;

}

else

{

xb=xb-i;

t=xb;

}

dda(w,p,xb,yb);

if((((xf-20) <= xa) && ((xf +20) >= xa) && ((yf-20) <= ya) && ((yf +20) >= ya)))

{

score++;

printf("%d\n",score);

tailgrow(xf,yf,xa,ya,xb,yb);

}

glEnd();

glFlush();

}

pointsz(1.0);

}

}

void specialKeys( int key, int x, int y) {

// Right arrow

if (key == GLUT_KEY_RIGHT){

w=xa;

p=ya;

if(p>yb)

{

t=p;

r=yb;

}

else

{

t=yb;

r=p;

}

key1=0;

motion();

}

// Left arrow

else if (key == GLUT_KEY_LEFT){

w=xa;

p=ya;

if(p>yb)

{

t=p;

r=yb;

}

else

{

t=yb;

r=p;

}

key1=1;

motion();

}

//up arrow

else if (key == GLUT_KEY_UP)

{

w=xa;

p=ya;

if(w>xb)

{

t=w;

r=xb;

}

else

{

t=xb;

r=w;

}

key1=2;

motion();

}

//down arrow

else if (key == GLUT_KEY_DOWN){

w=xa;

p=ya;

key1 =3;

if(w>xb)

{

t=w;

r=xb;

}

else

{

t=xb;

r=w;

}

motion();

}

}

void display2()

{

if((xa>=inx+50) ||(xa<=iny-50)||(ya>=inx) ||(ya<=iny))

{

glClear(GL_COLOR_BUFFER_BIT);

pointsz(1.0);

glBegin(GL_POINTS);

//show();

glColor3f(0.0,0.0,0.0);

view();

//call3();

glutSwapBuffers();

glEnd();

glFlush();

}

else

{

glColor3f(0.0,0.0,1.0);

pointsz(1.0);

view();

pointsz(4.0);

glBegin(GL_POINTS);

dda(xa,ya,xb,yb);//snake

if(start == 0)

{

glColor3f(1.0,1.0,1.0);

food();

start++;

}

if((((xf-20) <= xa) && ((xf +20) >= xa) && ((yf-20) <= ya) && ((yf +20) >= ya)))

{

score++;

printf("%d\n",score);

tailgrow(xf,yf,xa,ya,xb,yb);

}

glutSpecialFunc(specialKeys);

//sleep(1);

pointsz(4.0);

if(xa==xb)

{

if(ya>yb)

{

ya=ya+i;

yb=yb+i;

}

else

{

ya=ya-i;

yb=yb-i;

}

}

else if(ya==yb)

{

if(xa>xb)

{

xa=xa+i;

xb=xb+i;

}

else

{

xa=xa-i;

xb=xb-i;

}

}

glBegin(GL_POINTS);

dda(xa,ya,xb,yb);

glEnd();

glFlush();

glutPostRedisplay();

pointsz(6.0);

glColor3f(1.0,1.0,1.0);

glBegin(GL_POINTS);

SetPixel(xf,yf);

pointsz(1.0);

glFlush();

}

}